CA1169348A - Device for eliminating vibrations of a driver's chair - Google Patents
Device for eliminating vibrations of a driver's chairInfo
- Publication number
- CA1169348A CA1169348A CA000389009A CA389009A CA1169348A CA 1169348 A CA1169348 A CA 1169348A CA 000389009 A CA000389009 A CA 000389009A CA 389009 A CA389009 A CA 389009A CA 1169348 A CA1169348 A CA 1169348A
- Authority
- CA
- Canada
- Prior art keywords
- carrying frame
- wires
- chair
- driver
- cradle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/50—Seat suspension devices
- B60N2/52—Seat suspension devices using fluid means
- B60N2/527—Seat suspension devices using fluid means using liquids
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Seats For Vehicles (AREA)
- Vibration Prevention Devices (AREA)
Abstract
ABSTRACT
This invention relates to a device for eliminating vibrations of a driver's chair.(29) Known devices for eliminating vibrations of a driver's chair consist of so-called active systems, which are based on rel-atively complicated electronics. These devices consequently are expensive and not especially reliable in operation, either.
Besides, the vibrations are not eliminated from the driver's feet.
The device according to the invention is characterized in that it comprises a carrying frame (1), a cradle (15) located within the carrying frame (1) and carrying the driver's chair (29), which cradle (15) is provided with a number of rotatably supported pulleys (25,27) and is carried relative to the carrying frame (1) in that the pulleys (25,27) contact at least two wires or ropes supported by the carrying frame, one end of said wires is secured resiliently in the carrying frame, and the wires (30) extend transversely to the driving direction for the vehicle, in which the device is to be mounted, and damping means (31) are provided between the cradle and carrying frame.
This invention relates to a device for eliminating vibrations of a driver's chair.(29) Known devices for eliminating vibrations of a driver's chair consist of so-called active systems, which are based on rel-atively complicated electronics. These devices consequently are expensive and not especially reliable in operation, either.
Besides, the vibrations are not eliminated from the driver's feet.
The device according to the invention is characterized in that it comprises a carrying frame (1), a cradle (15) located within the carrying frame (1) and carrying the driver's chair (29), which cradle (15) is provided with a number of rotatably supported pulleys (25,27) and is carried relative to the carrying frame (1) in that the pulleys (25,27) contact at least two wires or ropes supported by the carrying frame, one end of said wires is secured resiliently in the carrying frame, and the wires (30) extend transversely to the driving direction for the vehicle, in which the device is to be mounted, and damping means (31) are provided between the cradle and carrying frame.
Description
1 lB~3~1~
This invention relates to a device for eliminating vibrations of a driver's chair.
The known devices of the aforesaid kind usually are so-called active systems. They opera-te with relatively complicated electronic equipment where vibrations and motions of the vehicle are scanned and whereafter the driverls chair is compensated for 'the type of agitation by means of control e~uipment.
These known devices are very expensive and, more-over, not very reliable in operation.
A further problem with known devices of the afore-said kind is that the feet of the driver rest on the bottom plate in the cab. ~hen this bottom plate is not de-vibra-ted in any way, the vibrations from it will be transferred to the driver's feet and even propagate upward along his legs.
The present invention has the object to produce a device of the kind mentioned above, by which the vibrations are eliminated by a so-called passive system.
~he device according to the invention renders possible so-called all-body damping.
Briefly stated, the present invention is a device for eliminating vibrations of a driver's chair, comprising a carrying frame, a cradle provided in the carrying frame and carrying the driver's chair, the cradle including a plurality of rotatably mounted pulleys and being supported relative to the carrying frame such that the pulleys contact at least two wires or ropes~supported by the carrying frame, one end of the wires being secured "~
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resiliently in the carrying ~rame, the wires extending transversely to the driving direction of the velhicle in which the device is~ adaptç~ ~o be moun-ted s~ch tha-t inclinations at least in the transverse direc-tion may be compensated, and damping means extending between the carrying frame and a portion of the cradle near a central portion of the driver's chair.
One embodiment of the invention is described in the following, with reference to the accompanying drawings, ln which - la -,. ._ 3 ~ B
, ` , Fig. 1 is a front view of the device according to the in-vention, Fig. 2 is a lateral view of the device according to the in-vention, Fig. 3 is a lateral view o4 the cradle comprised in the device according to the 'inventIon,:
Fig. 4 is a schematic ~ayou't of the leveI control system in the device'according to the'invention, Fig. 5 is a basic layout of the suspension of the cradle comprised in the device according to the invention.
The driver s chair shown in Figs. 1 and 2 comprises a carrying frame 1, which consists of a bottom member 2 and two side members 3a and 3b. The bottom member 2 and the side mambers 3a and 3b are~connected by means of inclined stay members 4.
The bottom member 2 consists of two box girders 5 extending transversely to the dr;ving direction of the vehic].e. The box girders are connected by two box girders 6 ex-tending in the driving direction of the vehicle and offset inward relative to the ends of the box girders 5.
Each side member 3a,3b consists of two upright box girders 7a and, respectivelv, 7b, which are inclined outward relative ~ :
.
to the centre of the:driver'~s chair. Each pair:of box girders~
7a and, respectivelv~ 7b are connected a* their upper ends by a horizonta]. box ~irder 8a and, respectively, 8b.
One pair of upright box girders:7a (:the right-hand one in Fig. 1) areprovided at their upper ends with a slit,:which ,: : : :
~' extends transversely.to the drivin~ direction of the vehicle, "
.
,. , . ~ .
:' ` ' '' ~ ~ ' ' I ~ 6~ 3 ~ ~
and in which a pull.ey 9 is supported rotatably. Additional pu].leys 10 are l.ocated immediately be].ow the first pulleys 9, but the second pair of pul.leys 10 are located in a pl.ane prrpendicu].ar to the first ~ulleys 9.
At t~e right-hand side member 3a in Fig. 1, a pressure medium cy].inder 11 is attached, which is located in the pl.ane of the side member 3a,and the piston rod 12 of which is directed downward.
A yoke 13 is attached hingedly to the free end of the piston rod 12 and is provided at its ends with openings 13a for receiving wires or ropes.
Qn.the horizontal box girder 8b of the second pair of upright box girders 7b two fastening eyes 14 are attached.
The driver's chair shown in Figs. 1 and 2 also comprises a cradl.e 15, which is ].ocated between the side members 3a,3b and consists of a bottom member 16 and two side members 17a,17b.
As appears from Figs. 1 - 3, the bottom member 16 comprises two box girders 18 a which extend transversely to the driving direc-t-ion of the vehicle,and two box girders 19, which ex-tend ln the driving direction of the vehicle and are sl.ightl.y drawn-in from the ends of the box girders 18. The box girders 19 are extended forward in~the driving direction of the vehicle, and the extended portions 2Q carry at their ends a foot su~port 21.
The side members :17a and 17b comprise two upright box girders 22, which are inclined outward in relation to the cen-tre of the driver's chair. The~two box girders in the same side member are :
.
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_~ 4 connected by a horizontal box girder 23 slightly above the centre of the upri~ht box girders 22. In the region of the u~per end of the upright box girders a slit 24 is ],ocated (see Fig. 3), in which pulleys 25 are supported rotatably.
Said pul].eys 25 are located in a plane transverse to the driving driving direction of the vehicle.
The two ~orward and, respectively, rearward box girders 22 are interconnected by means 'of ,downwardly curved box girders 26, in the centra]. portion of which a pulley 27 is mounted rotat-ably in the same plane as the ~ulleys 25.
On the side members 17a and 17b arm sup~orts 23 are a-ttached which are intended to receive contro]. equipment (not shown) for the vehicle and its tools.
On the bottom member 16 of the cradle 15 a driver s chair 29 is mounted.
Two wires 30 carry the cradle 15 relative to the carrying frame 1~ The wires 30 are secured at one end in the fastening eyes 14 on the horizontal. box girder 8b. Thereafter the wires 30 pass below the ~ul].eys 25 in the upright box girders 22 and a].so be].ow the pulleys 27 in -the downwardly curved box girders 26. Fro~
the right-hand pu].].eys 25 in Fig. 1 the wires 30 extend over "~ the nul,],eys 9 in the upright box girders 7a in Fig, 1. The ~ wires 30, besides, are def].ected over the pu].].eys 10 before they are secured in the ho],es 13a in the yoke 13.
By this sus~ension of the crad],e 15 with the chair 29, the cradle 15 can be moved in re].ation to the carrying frame 1 in the p].ane of the ~aper~in Fig. 1. The pul].eys 25 and 26 thereby roll on the wires 30 during said movement.
``' :
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~ ~ B~3~3 ~` It is understood immediately that the cradle 15 with the chair 29 always tends to assume a horizontal position relative to the carrying frame 1 in the plane of the paper in Fig. 1.
For effecting this movement of the cradle 15 on the wires 30 to occur as smoothly as possible, a number of shock absorbers 31 are arranged between the cradle 15 and carrying frame 1. The shock absorbers 31 are at one end hingedly attached to the horizontal box girders 23, while their other end is hingedly attached to the upright box girders 7a and 7b of the side members 3a and 3b.
All of the shock absorbers 31 are directed obliquely inward to the central portion of the driver's place 1.
The shock absorbers 31, in addition to braking the ; movement of the cradle 15 along the wires 30, also dampen the rocking motion at acceleration and retardation possibly per-formed by the cradle 15 in relation to the carrying frame 1 ~; perpendicularly to the plane of the paper in Fig. 1.
Due to the attachment of one end of the wires 30 to a resilient means -(the pressure medium cylinder 11), shocks and vibrations in the vertical plane are not transferred from the carrying frame 1 to the chair 29.
In the illustrated embodiment the resilient means is a pressure medium cylindar, but also, for example, a spring can be imàgined when some level control of the chair 29 is not desired.
The suspension of the chair 29 described above m relation to the carrying frame 1 does not permit any horlzontal adjustment of the chair in the plane of the paper in Fig. 2. Empiric tests, however, have shown that this is not necessary.
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In Fig. 4 the princi~l.e of the level. control for the chair 29 is shown.
In the wa].]. of the cy].inder 11 a hole 32 is located. A supply line 33 for ~ressure medium, normally hydraulic oil, is prov-ided at the u~per end of the cylinder 11 in Fig. 4. In ~the suppl.y line ~3 a throttl.e valve 34 i5 loca*ed.
The arrangement according to Fig. 4 operates as follows.
The piston rod 12 is actuated by an upwardly directed force P, the size of which varies with the weight of the person sitting on the chair 29. The force P is balanced by a pressure P~a, which acts on the u~per surface of the piston 35, which surface .
has an area a. The ~iston 35 now tends to assume a position of equi~.ibrium where the amount of pressure medium supPlied per time unit throu~h the l.ine 33 is equal. to the amount of peessure medium remoYed per time unit throu~h the hole 32. This position of equilibrium is achieved when the piston 35 covers a portion of the hole 32.
When now the upwardly directed force P on the pis-ton rod 12 increases in that somebody gets seated on the chair 29, the 5';,b~
piston rod 12 and piston 35 are moved upward until the pressure above the piston 35 has increased so that equilibrium again is achieved. Thereby, however, the piston has been moved above the hole 32, which imp].ies that no pressure medium is removed from the space above the pis-ton 35, bu~ only supp].y *akes place throu~h the throttled ].ine 33. The pressure P/a then increases, whereby the DiStOn 35 is moved downward until the afore-described ~osition of equ~.ibriu~ is achieved.
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1 ~ 6~3'1~3 ,,~ 7 Due to the arrangement shown in Fig. 4 ~ thus~ the chair 29 a].ways wil]. be on the same level., irrespective of the weigh-t of~the person sitting on the chair 29.
The invention is not restricted to the embodiment described ab~ve.
It can be imagined, for exampl.e, that the cylinder 11 is replaced by~two inclined hingedly attached cylinders 11', which is sh,own in the basic layout for the suspension of the cradle 15 a,ccording to Fig. 5. Hereby the progressivity is reduced.
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B ~.-.. ne~-~ the foot support connected to the cradl.e all-body da~ping is ob-tained~ i.e. the driver need not rest with the feet on the vibrating support.
The invention can be varied freel.y also in other respects within the scope of the attached claims.
..''
This invention relates to a device for eliminating vibrations of a driver's chair.
The known devices of the aforesaid kind usually are so-called active systems. They opera-te with relatively complicated electronic equipment where vibrations and motions of the vehicle are scanned and whereafter the driverls chair is compensated for 'the type of agitation by means of control e~uipment.
These known devices are very expensive and, more-over, not very reliable in operation.
A further problem with known devices of the afore-said kind is that the feet of the driver rest on the bottom plate in the cab. ~hen this bottom plate is not de-vibra-ted in any way, the vibrations from it will be transferred to the driver's feet and even propagate upward along his legs.
The present invention has the object to produce a device of the kind mentioned above, by which the vibrations are eliminated by a so-called passive system.
~he device according to the invention renders possible so-called all-body damping.
Briefly stated, the present invention is a device for eliminating vibrations of a driver's chair, comprising a carrying frame, a cradle provided in the carrying frame and carrying the driver's chair, the cradle including a plurality of rotatably mounted pulleys and being supported relative to the carrying frame such that the pulleys contact at least two wires or ropes~supported by the carrying frame, one end of the wires being secured "~
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': ' ' . : :
-: ' - ' ' ' ' ' .
.. .
6 ~
resiliently in the carrying ~rame, the wires extending transversely to the driving direction of the velhicle in which the device is~ adaptç~ ~o be moun-ted s~ch tha-t inclinations at least in the transverse direc-tion may be compensated, and damping means extending between the carrying frame and a portion of the cradle near a central portion of the driver's chair.
One embodiment of the invention is described in the following, with reference to the accompanying drawings, ln which - la -,. ._ 3 ~ B
, ` , Fig. 1 is a front view of the device according to the in-vention, Fig. 2 is a lateral view of the device according to the in-vention, Fig. 3 is a lateral view o4 the cradle comprised in the device according to the 'inventIon,:
Fig. 4 is a schematic ~ayou't of the leveI control system in the device'according to the'invention, Fig. 5 is a basic layout of the suspension of the cradle comprised in the device according to the invention.
The driver s chair shown in Figs. 1 and 2 comprises a carrying frame 1, which consists of a bottom member 2 and two side members 3a and 3b. The bottom member 2 and the side mambers 3a and 3b are~connected by means of inclined stay members 4.
The bottom member 2 consists of two box girders 5 extending transversely to the dr;ving direction of the vehic].e. The box girders are connected by two box girders 6 ex-tending in the driving direction of the vehicle and offset inward relative to the ends of the box girders 5.
Each side member 3a,3b consists of two upright box girders 7a and, respectivelv, 7b, which are inclined outward relative ~ :
.
to the centre of the:driver'~s chair. Each pair:of box girders~
7a and, respectivelv~ 7b are connected a* their upper ends by a horizonta]. box ~irder 8a and, respectively, 8b.
One pair of upright box girders:7a (:the right-hand one in Fig. 1) areprovided at their upper ends with a slit,:which ,: : : :
~' extends transversely.to the drivin~ direction of the vehicle, "
.
,. , . ~ .
:' ` ' '' ~ ~ ' ' I ~ 6~ 3 ~ ~
and in which a pull.ey 9 is supported rotatably. Additional pu].leys 10 are l.ocated immediately be].ow the first pulleys 9, but the second pair of pul.leys 10 are located in a pl.ane prrpendicu].ar to the first ~ulleys 9.
At t~e right-hand side member 3a in Fig. 1, a pressure medium cy].inder 11 is attached, which is located in the pl.ane of the side member 3a,and the piston rod 12 of which is directed downward.
A yoke 13 is attached hingedly to the free end of the piston rod 12 and is provided at its ends with openings 13a for receiving wires or ropes.
Qn.the horizontal box girder 8b of the second pair of upright box girders 7b two fastening eyes 14 are attached.
The driver's chair shown in Figs. 1 and 2 also comprises a cradl.e 15, which is ].ocated between the side members 3a,3b and consists of a bottom member 16 and two side members 17a,17b.
As appears from Figs. 1 - 3, the bottom member 16 comprises two box girders 18 a which extend transversely to the driving direc-t-ion of the vehicle,and two box girders 19, which ex-tend ln the driving direction of the vehicle and are sl.ightl.y drawn-in from the ends of the box girders 18. The box girders 19 are extended forward in~the driving direction of the vehicle, and the extended portions 2Q carry at their ends a foot su~port 21.
The side members :17a and 17b comprise two upright box girders 22, which are inclined outward in relation to the cen-tre of the driver's chair. The~two box girders in the same side member are :
.
` ~ ~ &~3~
_~ 4 connected by a horizontal box girder 23 slightly above the centre of the upri~ht box girders 22. In the region of the u~per end of the upright box girders a slit 24 is ],ocated (see Fig. 3), in which pulleys 25 are supported rotatably.
Said pul].eys 25 are located in a plane transverse to the driving driving direction of the vehicle.
The two ~orward and, respectively, rearward box girders 22 are interconnected by means 'of ,downwardly curved box girders 26, in the centra]. portion of which a pulley 27 is mounted rotat-ably in the same plane as the ~ulleys 25.
On the side members 17a and 17b arm sup~orts 23 are a-ttached which are intended to receive contro]. equipment (not shown) for the vehicle and its tools.
On the bottom member 16 of the cradle 15 a driver s chair 29 is mounted.
Two wires 30 carry the cradle 15 relative to the carrying frame 1~ The wires 30 are secured at one end in the fastening eyes 14 on the horizontal. box girder 8b. Thereafter the wires 30 pass below the ~ul].eys 25 in the upright box girders 22 and a].so be].ow the pulleys 27 in -the downwardly curved box girders 26. Fro~
the right-hand pu].].eys 25 in Fig. 1 the wires 30 extend over "~ the nul,],eys 9 in the upright box girders 7a in Fig, 1. The ~ wires 30, besides, are def].ected over the pu].].eys 10 before they are secured in the ho],es 13a in the yoke 13.
By this sus~ension of the crad],e 15 with the chair 29, the cradle 15 can be moved in re].ation to the carrying frame 1 in the p].ane of the ~aper~in Fig. 1. The pul].eys 25 and 26 thereby roll on the wires 30 during said movement.
``' :
.. . . ~ .
'. ~
~ ~ B~3~3 ~` It is understood immediately that the cradle 15 with the chair 29 always tends to assume a horizontal position relative to the carrying frame 1 in the plane of the paper in Fig. 1.
For effecting this movement of the cradle 15 on the wires 30 to occur as smoothly as possible, a number of shock absorbers 31 are arranged between the cradle 15 and carrying frame 1. The shock absorbers 31 are at one end hingedly attached to the horizontal box girders 23, while their other end is hingedly attached to the upright box girders 7a and 7b of the side members 3a and 3b.
All of the shock absorbers 31 are directed obliquely inward to the central portion of the driver's place 1.
The shock absorbers 31, in addition to braking the ; movement of the cradle 15 along the wires 30, also dampen the rocking motion at acceleration and retardation possibly per-formed by the cradle 15 in relation to the carrying frame 1 ~; perpendicularly to the plane of the paper in Fig. 1.
Due to the attachment of one end of the wires 30 to a resilient means -(the pressure medium cylinder 11), shocks and vibrations in the vertical plane are not transferred from the carrying frame 1 to the chair 29.
In the illustrated embodiment the resilient means is a pressure medium cylindar, but also, for example, a spring can be imàgined when some level control of the chair 29 is not desired.
The suspension of the chair 29 described above m relation to the carrying frame 1 does not permit any horlzontal adjustment of the chair in the plane of the paper in Fig. 2. Empiric tests, however, have shown that this is not necessary.
' dm: ~\ 5 : - `- ~ :
. : :
I .~ 6 ~3 3 ~
In Fig. 4 the princi~l.e of the level. control for the chair 29 is shown.
In the wa].]. of the cy].inder 11 a hole 32 is located. A supply line 33 for ~ressure medium, normally hydraulic oil, is prov-ided at the u~per end of the cylinder 11 in Fig. 4. In ~the suppl.y line ~3 a throttl.e valve 34 i5 loca*ed.
The arrangement according to Fig. 4 operates as follows.
The piston rod 12 is actuated by an upwardly directed force P, the size of which varies with the weight of the person sitting on the chair 29. The force P is balanced by a pressure P~a, which acts on the u~per surface of the piston 35, which surface .
has an area a. The ~iston 35 now tends to assume a position of equi~.ibrium where the amount of pressure medium supPlied per time unit throu~h the l.ine 33 is equal. to the amount of peessure medium remoYed per time unit throu~h the hole 32. This position of equilibrium is achieved when the piston 35 covers a portion of the hole 32.
When now the upwardly directed force P on the pis-ton rod 12 increases in that somebody gets seated on the chair 29, the 5';,b~
piston rod 12 and piston 35 are moved upward until the pressure above the piston 35 has increased so that equilibrium again is achieved. Thereby, however, the piston has been moved above the hole 32, which imp].ies that no pressure medium is removed from the space above the pis-ton 35, bu~ only supp].y *akes place throu~h the throttled ].ine 33. The pressure P/a then increases, whereby the DiStOn 35 is moved downward until the afore-described ~osition of equ~.ibriu~ is achieved.
. .
' l ~
.
.~
', , . ' : , :
', ' ' . ' ' ~
1 ~ 6~3'1~3 ,,~ 7 Due to the arrangement shown in Fig. 4 ~ thus~ the chair 29 a].ways wil]. be on the same level., irrespective of the weigh-t of~the person sitting on the chair 29.
The invention is not restricted to the embodiment described ab~ve.
It can be imagined, for exampl.e, that the cylinder 11 is replaced by~two inclined hingedly attached cylinders 11', which is sh,own in the basic layout for the suspension of the cradle 15 a,ccording to Fig. 5. Hereby the progressivity is reduced.
3"~ c ~
B ~.-.. ne~-~ the foot support connected to the cradl.e all-body da~ping is ob-tained~ i.e. the driver need not rest with the feet on the vibrating support.
The invention can be varied freel.y also in other respects within the scope of the attached claims.
..''
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A device for eliminating vibrations of a driver's chair, comprising a carrying frame, a cradle provided in the carrying frame and carrying the driver's chair, the cradle including a plurality of rotatably mounted pulleys and being supported relative to the carrying frame such that the pulleys contact at least two wires or ropes supported by the carrying frame, one end of said wires being secured resiliently in the carrying frame, the wires extending transversely to the driving direction of the vehicle in which the device is adapted to be mounted such that inclinations at least in the transverse direction may be compensated, and damping means extending between the carrying frame and a portion of the cradle near a central portion of the driver's chair.
2. The device as defined in claim 1, wherein the carrying frame comprises two side members, another end of the wires being non-resiliently attached to one side member, while the one end of the wires is attached to a piston rod of a pressure medium cylinder, said pressure medium cylinder being attached on the other side member with the piston rod directed downward.
3. The device as defined in claim 1, wherein the damping means comprises shock absorbers, which are directed inward to the cradle at the central portion of the driver's chair.
4. The device as defined in claim 1, wherein three pulleys of the cradle are in contact with each wire.
5. The device as defined in claim 2, wherein on the side member of the carrying frame where the wires are secured resiliently, each wire runs over the two pulleys attached to said member, the planes of rotation of the two pulleys being perpendicular to each other.
6. The device as defined in claim 1, wherein the resiliently secured ends of the wires are connected to a spring.
7. The device as defined in claim 2, wherein the pressure medium cylinder is provided with a supply line including a throttle valve, and a hole being located in the cylinder wall at about half the cylinder height.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8007701A SE429525B (en) | 1980-11-03 | 1980-11-03 | DEVICE FOR DEVibrating a front seat |
| SE8007701-9 | 1980-11-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1169348A true CA1169348A (en) | 1984-06-19 |
Family
ID=20342149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000389009A Expired CA1169348A (en) | 1980-11-03 | 1981-10-29 | Device for eliminating vibrations of a driver's chair |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4401342A (en) |
| CA (1) | CA1169348A (en) |
| DE (1) | DE3142553A1 (en) |
| FI (1) | FI69601C (en) |
| SE (1) | SE429525B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE438826B (en) * | 1981-03-10 | 1985-05-13 | Rova Jan Erik Torsten Mikael | DEVICE FOR SPRING SYSTEM FOR SPRING Suspension of front seats or seat of vehicle |
| US4687173A (en) * | 1984-02-17 | 1987-08-18 | Genna Robert T | Mechanical and acoustical vibration reduction apparatus for turntables and speaker enclosures |
| US4763869A (en) * | 1985-03-20 | 1988-08-16 | Tokico Ltd. | Vibration isolating apparatus |
| US4941640A (en) * | 1985-03-20 | 1990-07-17 | Tokico Ltd. | Vibration isolating apparatus |
| GB2203032B (en) * | 1987-02-12 | 1990-05-02 | Hoskins Ltd | Resiliently suspended load carrier |
| FR2623450B1 (en) * | 1987-11-20 | 1990-05-04 | Durand Francois | BENCH WITH VARIABLE SUSPENSION FOR LIGHT MOTOR VEHICLE |
| FR2640573B1 (en) * | 1988-12-15 | 1994-06-03 | Durand Francois | BENCH FOR LIGHT MOTOR VEHICLE |
| DE3936375C1 (en) * | 1989-11-02 | 1991-01-31 | Audi Ag, 8070 Ingolstadt, De | |
| DE20001748U1 (en) * | 2000-02-01 | 2000-05-11 | Ostmecklenburgische Flugzeugba | Seat for aircraft and land vehicles, in particular for light aircraft |
| US7073865B2 (en) * | 2003-07-03 | 2006-07-11 | Lear Corporation | Tuned vibration absorbing system for a seat system |
| US7008015B2 (en) | 2003-12-16 | 2006-03-07 | Eric Bischoff | Seat suspension assembly |
| DE202004021112U1 (en) * | 2004-09-18 | 2006-10-26 | Otto Bock Healthcare Gmbh | Electric wheelchair to act as a vehicle has a chassis, a driver's seat, curved rails, a slope sensor for seat angle and an adjusting device |
| WO2011039754A1 (en) * | 2009-10-02 | 2011-04-07 | Mobius Protection Systems Ltd. | Shock absorbing device |
| JP5407837B2 (en) * | 2009-12-18 | 2014-02-05 | オイレス工業株式会社 | Active dynamic vibration absorber |
| US10682933B2 (en) | 2018-05-16 | 2020-06-16 | Eric Bischoff | Adjustable seat suspension assembly |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1599555A (en) * | 1925-02-26 | 1926-09-14 | Lester W Coe | Vehicle seat |
| US1774555A (en) * | 1928-08-08 | 1930-09-02 | Charles E Horsley | Resilient seat |
| US2637368A (en) * | 1948-04-30 | 1953-05-05 | All American Eng Co | Shock absorbing means for aircraft seats |
| US2707986A (en) * | 1953-03-19 | 1955-05-10 | Leslie W Johnson | Resilient support for tractor seat |
| US3099261A (en) * | 1960-09-06 | 1963-07-30 | Boeing Co | Full body restraint system |
| US3986748A (en) * | 1973-05-18 | 1976-10-19 | Emil Magnuson | Tractor chair cushion device |
| US4128217A (en) * | 1977-07-22 | 1978-12-05 | Ara, Inc. | System for isolating floor vibration and distortions from an object such as an aircraft seat |
-
1980
- 1980-11-03 SE SE8007701A patent/SE429525B/en not_active IP Right Cessation
-
1981
- 1981-10-27 DE DE19813142553 patent/DE3142553A1/en not_active Withdrawn
- 1981-10-27 US US06/315,426 patent/US4401342A/en not_active Expired - Fee Related
- 1981-10-29 CA CA000389009A patent/CA1169348A/en not_active Expired
- 1981-10-29 FI FI813403A patent/FI69601C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FI69601C (en) | 1986-03-10 |
| US4401342A (en) | 1983-08-30 |
| SE8007701L (en) | 1982-05-04 |
| FI813403L (en) | 1982-05-04 |
| DE3142553A1 (en) | 1982-08-26 |
| SE429525B (en) | 1983-09-12 |
| FI69601B (en) | 1985-11-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |