US3792905A - Power-operated chair - Google Patents
Power-operated chair Download PDFInfo
- Publication number
- US3792905A US3792905A US00288185A US3792905DA US3792905A US 3792905 A US3792905 A US 3792905A US 00288185 A US00288185 A US 00288185A US 3792905D A US3792905D A US 3792905DA US 3792905 A US3792905 A US 3792905A
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- US
- United States
- Prior art keywords
- rest
- seat
- back rest
- leg
- adjacent
- 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 - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G15/00—Operating chairs; Dental chairs; Accessories specially adapted therefor, e.g. work stands
- A61G15/02—Chairs with means to adjust position of patient; Controls therefor
Definitions
- ABSTRACT A chair for medical and quasi-medical use comprising a back rest and leg rest respectively pivotally connected to the rear and front edges of a seat rest, power means connected to said back rest to move it between upright and horizontal positions, and linkage means interconnected between said back rest and leg rest to move the leg rest between vertically depending and horizontal positions incident to corresponding movement of said back rest between said positions thereof.
- Certain services to be rendered a patient are undertaken when the patient is seated upright in the chair, while other services and operations upon the patient are performed when the patient is inclined angularly in various positions relative to the horizontal seat, such inclinations frequently extending to horizontal positions in which the patient is substantially entirely reclined in such horizontal position.
- It is the principal object of the present invention to provide a power-operated chair which, without restriction thereto, particularly is suitable for dental operations, ophthalmology examinations and operations, as well as other similar services and operations, and in which a back rest is pivotally supported adjacent the rear edge of a seat and a leg rest is pivotally supported-
- Another object of the invention is to effect the foregoing connecting of the power means to the back rest, as well as .transmit movement from the back rest to the leg rest by means of extensions depending downwardly from the back rest
- a further object of the invention is to provide a screw jack which extends from one end of an electric motor supported beneath the seat adjacent the forward end thereof, and the screw jack extending'rearwardly for connection to one of said aforementioned extensions on the back rest. 7
- Still another object of the invention is to provide slidable, intermediate link means between additional links respectively connected to opposite ends of the slidable link to provide connection for transmittal of movement from one of said extensions on the back rest to the leg rest.
- a still further object of the invention is to provide appropriate support means for the motor and screw jack, whereby limited pivotal movement is afforded the motor relative to the support means due to the slight changes in angular disposition of the axis of the screw jack relative to the plane of the seat incident to moving the back rest about its pivot through the pivotal attachment of the outer end of the screw jack to one of said extensions on the back rest.
- FIG. 1 is a side elevation of an exemplary poweroperated chair embodying the principles of the present invention and in which the back rest and leg rest are illustrated in full lines in their substantially vertical position, while the same are illustrated in phantom in their extended, substantially horizontal position.
- FIG. 2 is a diagrammatic illustration of the essential movable elements of the power-operated chair illustrated in FIG. 1.
- FIG. 3 is a bottom plan view of the power-operated chair shown in FIG. 1, and in which the back rest and leg rest are shown in extended, substantially horizontal positions with respect to the seat.
- FIG. 4 is a side elevation arranged to illustrate details of the power means which include an electric motor and screw jack connected thereto and the outer end of the screw jack being pivotally connected to an extension on the back rest, substantially as seen on the line 4-4 of FIG. 3.
- FIG. 5 is a view similar to FIG. 4, but being arranged to illustrate the linkage by which one of the extensions on the back rest is connected to the leg rest in order to transmit direct movement thereto resulting from pivotal movement of the back rest with respect to the seat, as seen on the line 55 of FIG. 3.
- FIGS. 6, 7 and 8 are various fragmentary views showing details of mechanism to control movement of the foot rest relative to the leg rest.
- FIG. 1 a chair base 10 which is adapted to be mounted I in conventional manner upon a supporting surface such as a floor.
- the base may either be powered-operated to elevate or lower a vertical movable support plunger 12 or the same may be raised and lowered by foot power, for example, by operation of a treadle member 14.
- said base mechanism primarily is for illustrative purposes to represent an appropriate structure capable of supporting the seat rest 16, which normally is substantially horizontal, although preferably slightly inclined downwardly toward the rear as shown in FIG. 1, and to which a back rest 18 is pivotally interconnected adjacent the rear edge of the seat rest 16 and a leg rest 20 is pivotally connected to the forward edge portion of the seat rest 16.
- the seat rest 16, back rest 18, and leg rest 20 may be appropriately unholstered in accordance with conventional practice.
- the actuating and positioning mechanism comprising the novel aspects of the present invention are adapted to be used with a wide variety of chairs of the type referred to, and therefore, the manner of upholstering the seat rest, back rest, and leg rest is relatively immaterial as far as the present invention is concerned.
- said various elements usually include base frame members of one kind or another to which an upholstered member is connected. Details of such base frame members for such elements are best illustrated in FIG. 3, to which attention is directed.
- FIG. 3 is a bottom plan view of the chair assembly comprising the seat rest 16, back rest 18, and leg rest 20, as well as foot rest 22, which is pivotally connected to the outer end of the leg rest 20, it will be seen that the seat rest 20 comprises a suitable base panel 24, which may be formed from any suitable material, such as metal, plywood, or otherwise.
- An upholstered seat cushion 26 is connected to the upper surface of the base panel 24 by suitable screws or otherwise.
- a head casting 28 which has a central socket 30 which receives the upper end of the support plunger 12 and relative to which the head casting 28 is rotatable about the vertical axis of support plunger 12.
- appropriate locking means 32 is provided on the head casting 28 and is operable from either side of the seat rest 16 by means of handled levers
- the head casting 28 is connected to the under surface of the base panel 24 of the seat rest 16 by means.
- the brackets 38 are provided for purposes of pivotally connecting one end of each of a pair of links 42 to the lower surface of the seat 16, while the opposite ends of the links are pivotally connected to clevises 44 which project from one end of the foot rest 22 adjacent opposite sides thereof, said foot rest being connected to the outer end of the leg rest 20 by pivots 46 of appropriate type, as shown in FIG. 5.
- the purpose of the links 42 is to effect suitable positioning of the foot rest 22 with respect to the leg rest 20, regardless of whether the leg rest 20 is in extended, horizontal position, or the depending position with respect to the front edge of the seat rest 16.
- the foot rest 22 and its positioning mechanism also comprises part of the improvement afforded by the invention, but in addition, shows certain conventional features of the chair in connection with which the present invention is concerned.
- An additional pair of hinge brackets 48 is connected to the lower surface of the base panel 24 of the seat rest 16 adjacent the rear edge thereof and respectively at opposite sides of said seat rest. These are best illustrated in FIG. 3.
- the outer side edge of each of the brackets 48 has an upwardly extending ear 50 to which another hinge bracket 52 is pivotally connected by a hinge bolt 54.
- the portion of hinge brackets 52 which are pivotally connected to the other hinge brackets 48 are connected to and extend perpendicular to a base member 56 which is of appreciable area as can be seen from FIG. 3.
- the base members 56 respectively are adjacent opposite sides of the back rest 18 and are connected thereto by a series of screws or bolts 58.
- the base members 56 are covered by a suitable finishing panel 60 so as to render the back rest aesthetic in appearance.
- the base members 56 also serve another very important function with respect to the present invention.
- Base members 56 respectively have integral extensions 62 and 63 projecting therefrom which, as can be seen from FIGS. 1, 4 and 5, depend from the lower edge of the back rest 18 when the same is in substantially vertical position.
- the terminal end portions of each of the extensions 62 and 63 are substantially parallel to the longitudinal plane of the back rest 18, but are laterally offset a slight distance from the rear surface of the back rest 18 to facilitate the pivotal action thereof with respect to the pivot 54 by power means, details of which are as follows:
- the power means primarily comprises an electric motor 64, which is provided with a reduction gear housing 66 at one end thereof.
- the gear housing 66 is provided with a transversely spaced pair of lugs 68, which respectively extend between a pair of complementary cars 70 provided on bracket 72 which is connected by the bolts 36, which also affixes one side of the head casting 28, to the lower surface of the base panel 24 of seat rest 16.
- a suitable pivot shaft 74 extends between the lug 68 and ears 70 to pivotally connect the sameand, thus, support the power means comprising motor 64'and its associated mechanism with respect to the seat rest 16.
- the power means of the chair also includes a screw jack 76 of conventional type.
- the extensible member thereof moves between the full line and dotted line positions thereof shown in FIG. 4, for example.
- the outer end of the extensible portion of the screw jack 76 is connected to one of the extensions 62 by means of a pivot pin 78, as clearly shown in FIGS. 1 and 4.
- the motor 64 is connected in an ap- Movement of the back rest l8 by the power means 64 and its associated mechanism is transmitted to the leg rest by operation of the extension 63 which is integral with the other base member 56 from that which I supports the companion extension 62, which is rigid with respect to back rest 18.
- Extension 63 is interconnected to a linkage system comprising a connecting link 80, one arm of which is connected to the extremity of extension 63 by a pivot bolt 82.
- the opposite end of link 80 is connected by a pivot bolt 84 to one end of a slidable crosshead rod 86, which is guided for movement longitudinally of itself by a pair of stationary bearings 88, as best seen in FIGS. 3 and S.
- the opposite end of the rod 86 is connected to one end of another link 90 by means of a pivot bolt'92 and the opposite end of link 90 is pivotally connected to a bracket 94, which is affixed in a suitable manner to a portion of the frame structure to which the upholstery of leg rest 20 is connected.
- Movement of the back rest 18 and leg rest 20 occurs simultaneously as such movement is effected by the power means comprising motor 64 and the driving mechanism connected thereto which engages extension 62 on back rest 18, and in turn, causes companion extension 63 on the back rest to effect corresponding movement of the leg rest 20 through the linkage described above, as especially illustrated in detail in FIG. 5.
- the power means and actuating mechanism operated thereby for moving the back rest 18 and leg rest 20 simultaneously between the different optimum positions thereof with respect to the seat rest 16 is relatively simple without sacrificing efficiency, strength, and durability.
- the simplicity and durable aspects result in only minimum servicing of the chair, even over long' periods of use.
- the simplicity of the operating mechanism also can be appreciated at a glance from inspecting the diagrammatic view comprising FIG. 2.
- the foot rest 22 is pivotally connected to the outer ends of the leg rest 20 by pivot pins 46. Details of the pivotal support for the foot rest 22 are best illustrated in detail in FIGS. 6-8. Said foot rests preferably are formed by casting from suitable metal. Due to the pivot pins 46 being adjacent the inner edge of the foot rest, it is apparent that said foot rest is supported in cantilever manner, whereby gravity normally tends to move the outer end of the foot rest downwardly. For example, when the leg rest 20is in the depending position, such as when the back rest 18 is upright, gravity tends to dispose the foot rest in substantially horizontal position. Similarly, when the back rest 18 and leg rest 20 are disposed in substantially horizontal position, such as shown in full lines in FIGS.
- the links 44 are actuated automatically to move the clevises 44 clockwise and, in so doing, will dispose them in the position illustrated in FIG. 5, in which position gravity will also pivotally move the foot rest 22 clockwise when the leg rest 20 is being elevated from its depending position.
- the shoulders 96 on the foot rest will similarly engage the clevises 44 when the elements are in the position shown in FIG. 5, for example.
- each of the clevises 44 is also provided with a bearing hole 106 through which the pivot pins 46 extend, as shown in FIG. 7, and upon which the clevises 44 are freely rotatable.
- the pivot pins 46 also are provided with a longitudinally extending spline 108, as shown in FIG.-7, and into which the set screws 98 extend, for example.
- a washer 110 which is substantially larger in diameter than the pivot shaft 46, as seen from FIGS. 7 and 8, also is mounted upon at least one of the pivot shafts 46 and has a tang 112 thereon, as shown in FIG. 8, for purposes of keying said washer to said shaft, whereby the same is rotatable with the foot rest 22 which the same is pivotally moved with the pivot shaft 46 relative to their bearing sockets 110.
- the washer 110 serves an important function with respect to maintaining the foot rest 22 in elevated position, such as shown in dotted lines in FIG. 6, to insure that the foot rest will not fall accidentally to its horizontal position from the elevated position due to the action of gravity upon the same. This is accomplished by providing within the boss 104 of side frame member 102 a blind bore 114 which is shown in FIG. 7. Disposed within the bore is a compressed spring 116 which urges a metal ball 118 outwardly for disposition of the same within a notch 120 formed at a precise location within the periphery of the washer 110, shown in FIG. 8. When the foot rest 22 is disposed in the vertical position as shown in FIG. 8 and also in the dotted line position of FIG.
- the ball 118 will be in registry with the notch 120 and be projected into the same a sufficient distance to yieldably maintain the foot rest in such upstanding, vertical position.
- the forces of spring 116 readily is overcome to release the notch 120 from engagement by ball 118, and thus, permit downward pivotal movement of the foot rest from its elevated position. Otherwise, the frictional engagement of the ball 118 against the surface of washer 110 when the foot rest is moving to its various pivoted positions is inadequate to overcome the force of gravity and therefore, will not interfere with such pivotal movement of the foot rest to any of its operative positions of those illustrated in the various figures with respect to the depending and horizontally extending positions of the associated leg rest 20.
- a chair including a back rest, a seat rest, and a leg rest; hinge means respectively positioned adjacent 0pposite sides of said rests and pivotally connecting the back rest to the rest portion of said seat rest and pivotally connecting the leg rest to the front portion of the seat rest; a pair of extensions fixed rigidly to and depending from the pivoted end of said back rest respectively adjacent the inner side edges of said hinge means at opposite sides of said seat rest and back rest and extending beyond the pivot axes of said hinge means; power means comprising an electric motor and speed reduction unit supported beneath said seat rest adjacent one side thereof, a screw jack interconnected at one end to said motor for actuation thereby and the op posite end of said screw jack being connected to the extension on said back rest adjacent said one side of said seat rest and operable to move said back rest between substantially upright and horizontal positions relative to said seat rest; and linkage means beneath said seat rest supported for movement adjacent the other side thereof and connected between said other extension on said back rest adjacent said other side of seat rest and including a bar slidably supported within
Abstract
Description
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US28818572A | 1972-09-11 | 1972-09-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3792905A true US3792905A (en) | 1974-02-19 |
Family
ID=23106108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00288185A Expired - Lifetime US3792905A (en) | 1972-09-11 | 1972-09-11 | Power-operated chair |
Country Status (1)
Country | Link |
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US (1) | US3792905A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2392629A1 (en) * | 1977-06-01 | 1978-12-29 | Condor | Reclining armchair with footrest - uses electrically operated double-action movement controlling mechanism operated whilst user is seated |
DE3016839A1 (en) * | 1980-05-02 | 1981-11-05 | Kurt 5093 Burscheid Seydel | Pneumatically controlled fully reclining chair - has individual movement of all five sections powered by air compressor |
FR2482857A1 (en) * | 1980-05-23 | 1981-11-27 | Cir Coop Ind Romagnol | ODONTOLOGICAL OPERATING ARMCHAIR |
US4572573A (en) * | 1981-10-22 | 1986-02-25 | Takara Company | Dental chair operating apparatus |
US4586749A (en) * | 1983-08-05 | 1986-05-06 | Takara Company, New York, Inc. | Barber/beauty chair |
US4691964A (en) * | 1986-06-30 | 1987-09-08 | Morgan John A | Powered reclining chair |
US5467002A (en) * | 1993-11-05 | 1995-11-14 | Reliance Medical Products, Inc. | Adjustable chair having programmable control switches |
US5645313A (en) * | 1992-05-06 | 1997-07-08 | Best; Robert Edward | Dentist's or other chairs |
US20100127550A1 (en) * | 2008-11-27 | 2010-05-27 | Jeff Baker | Articulated chair having universal reclining armrest system |
US20170065083A1 (en) * | 2008-11-27 | 2017-03-09 | Medical Technology Industries, Inc. | Articulated chair having universal reclining armrest system |
US20190231627A1 (en) * | 2018-02-01 | 2019-08-01 | Medical Technology Industries, Inc. | Programmable examination and procedure tables and chairs |
US20220202191A1 (en) * | 2020-12-30 | 2022-06-30 | Leping Yi | Angle adjustment assembly and sofa |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1534272A (en) * | 1923-12-14 | 1925-04-21 | Walter F Koken | Foot-rest-operating mechanism for reclining chairs |
US1675547A (en) * | 1925-07-09 | 1928-07-03 | Emil J Paidar Company | Reclining chair and foot rest |
US1753470A (en) * | 1928-09-17 | 1930-04-08 | Meyer William | Beauty-parlor chair |
US2514447A (en) * | 1949-02-04 | 1950-07-11 | Heywood Wakefield Co | Chair and leg rest combination |
US2714922A (en) * | 1952-10-17 | 1955-08-09 | Joseph L Mckibban | Adjustable reclining chair |
US2770289A (en) * | 1954-08-09 | 1956-11-13 | Mckendrey Leo | Hospital chair |
US3172699A (en) * | 1963-07-01 | 1965-03-09 | Den Tal Ez Chair Mfg Co | Dental chair |
US3476495A (en) * | 1967-05-17 | 1969-11-04 | Lane Co Inc | Reclining chair |
-
1972
- 1972-09-11 US US00288185A patent/US3792905A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1534272A (en) * | 1923-12-14 | 1925-04-21 | Walter F Koken | Foot-rest-operating mechanism for reclining chairs |
US1675547A (en) * | 1925-07-09 | 1928-07-03 | Emil J Paidar Company | Reclining chair and foot rest |
US1753470A (en) * | 1928-09-17 | 1930-04-08 | Meyer William | Beauty-parlor chair |
US2514447A (en) * | 1949-02-04 | 1950-07-11 | Heywood Wakefield Co | Chair and leg rest combination |
US2714922A (en) * | 1952-10-17 | 1955-08-09 | Joseph L Mckibban | Adjustable reclining chair |
US2770289A (en) * | 1954-08-09 | 1956-11-13 | Mckendrey Leo | Hospital chair |
US3172699A (en) * | 1963-07-01 | 1965-03-09 | Den Tal Ez Chair Mfg Co | Dental chair |
US3476495A (en) * | 1967-05-17 | 1969-11-04 | Lane Co Inc | Reclining chair |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2392629A1 (en) * | 1977-06-01 | 1978-12-29 | Condor | Reclining armchair with footrest - uses electrically operated double-action movement controlling mechanism operated whilst user is seated |
DE3016839A1 (en) * | 1980-05-02 | 1981-11-05 | Kurt 5093 Burscheid Seydel | Pneumatically controlled fully reclining chair - has individual movement of all five sections powered by air compressor |
FR2482857A1 (en) * | 1980-05-23 | 1981-11-27 | Cir Coop Ind Romagnol | ODONTOLOGICAL OPERATING ARMCHAIR |
US4572573A (en) * | 1981-10-22 | 1986-02-25 | Takara Company | Dental chair operating apparatus |
US4586749A (en) * | 1983-08-05 | 1986-05-06 | Takara Company, New York, Inc. | Barber/beauty chair |
US4691964A (en) * | 1986-06-30 | 1987-09-08 | Morgan John A | Powered reclining chair |
US5645313A (en) * | 1992-05-06 | 1997-07-08 | Best; Robert Edward | Dentist's or other chairs |
US5467002A (en) * | 1993-11-05 | 1995-11-14 | Reliance Medical Products, Inc. | Adjustable chair having programmable control switches |
US20110095587A1 (en) * | 2008-11-27 | 2011-04-28 | Jeff Baker | Articulated chair having universal reclining armrest system |
US7862123B2 (en) | 2008-11-27 | 2011-01-04 | Medical Technologies Industries | Articulated chair having universal reclining armrest system |
US20100127550A1 (en) * | 2008-11-27 | 2010-05-27 | Jeff Baker | Articulated chair having universal reclining armrest system |
US8480172B2 (en) * | 2008-11-27 | 2013-07-09 | Jeff Baker | Articulated chair having universal reclining armrest system |
US9125495B2 (en) | 2008-11-27 | 2015-09-08 | Medical Technologies Industries, Inc. | Articulated chair having universal reclining armrest system |
US20170065083A1 (en) * | 2008-11-27 | 2017-03-09 | Medical Technology Industries, Inc. | Articulated chair having universal reclining armrest system |
US9782319B2 (en) * | 2008-11-27 | 2017-10-10 | Medical Technology Industries, Inc. | Articulated chair having universal reclining armrest system |
US20190231627A1 (en) * | 2018-02-01 | 2019-08-01 | Medical Technology Industries, Inc. | Programmable examination and procedure tables and chairs |
US10632037B2 (en) | 2018-02-01 | 2020-04-28 | Medical Technology Industries, Inc. | Programmable examination and procedure tables and chairs |
US10898402B2 (en) * | 2018-02-01 | 2021-01-26 | Medical Technology Industries, Inc. | Programmable examination and procedure tables and chairs |
US20220202191A1 (en) * | 2020-12-30 | 2022-06-30 | Leping Yi | Angle adjustment assembly and sofa |
US11517116B2 (en) * | 2020-12-30 | 2022-12-06 | Leping Yi | Angle adjustment assembly and sofa |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: FLEET NATIONAL BANK,RHODE ISLAND Free format text: SECURITY INTEREST;ASSIGNOR:F&F KOENIGKRAMER, INC.,;REEL/FRAME:004761/0224 Effective date: 19870630 Owner name: FLEET NATIONAL BANK, 111 WESTMINSTER ROAD, PROVIDE Free format text: SECURITY INTEREST;ASSIGNOR:F&F KOENIGKRAMER, INC.,;REEL/FRAME:004761/0224 Effective date: 19870630 |
|
AS | Assignment |
Owner name: DENTSPLY INTERNATIONAL INC., 570 WEST COLLEGE AVE. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DENTSPLY RESEARCH & DEVELOPMENT CORP. A CORP. OF DE;REEL/FRAME:004736/0589 Effective date: 19870624 Owner name: F&F KOENIGKRAMER, INC., 96 CALDWELL DR., CINCINNAT Free format text: SECURITY INTEREST;ASSIGNOR:DENTSPLY INTERNATIONAL, INC.;REEL/FRAME:004736/0586 Effective date: 19870630 |
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AS | Assignment |
Owner name: RELIANCE MEDICAL PRODUCTS, INC., OHIO Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FLEET NATIONAL BANK;REEL/FRAME:005048/0276 Effective date: 19890313 |