CA1118093A - Pipe inspection apparatue - Google Patents
Pipe inspection apparatueInfo
- Publication number
- CA1118093A CA1118093A CA000327800A CA327800A CA1118093A CA 1118093 A CA1118093 A CA 1118093A CA 000327800 A CA000327800 A CA 000327800A CA 327800 A CA327800 A CA 327800A CA 1118093 A CA1118093 A CA 1118093A
- Authority
- CA
- Canada
- Prior art keywords
- housing
- camera
- amplifier
- inspection apparatus
- closed circuit
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/005—Investigating fluid-tightness of structures using pigs or moles
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/12—Installations enabling inspection personnel to drive along sewer canals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/38—Investigating fluid-tightness of structures by using light
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
- H04N7/185—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source from a mobile camera, e.g. for remote control
Abstract
ABSTRACT OF THE DISCLOSURE
A television camera, scanner and amplifier all in water proof housings which are close to one another and in tandem.
The camera has illuminating lamps coupled to it arranged to illuminate a space forwardly of the lens. An elongate television cable couples the scanner to a television readout screen. The housings are arranged so that they can be moved through a bend or a tee of a standard four inch salt-glazed sewer pipe.
A television camera, scanner and amplifier all in water proof housings which are close to one another and in tandem.
The camera has illuminating lamps coupled to it arranged to illuminate a space forwardly of the lens. An elongate television cable couples the scanner to a television readout screen. The housings are arranged so that they can be moved through a bend or a tee of a standard four inch salt-glazed sewer pipe.
Description
This invention relates to an inspection apparatus which can be used (inter alia) for the inspection of pipes of suf-ficient diameter to accept a closed circuit type television camera.
5. BACKGROUND OF THE INVENTION
Some drain pipes which are used are salt glazed sewer pipes and have an inside diameter of four inches (100 mm) or thereabouts, and are constructed to a standard. Most tele-vision cameras are of such length that they are not able to 10. negotiate standard bends or tees in pipes of this dimension.
A television camera has associated with it two separate cir-cuits, namely a scanning circuit and a signalling amplifier circuit, both of which are usually adjacent the television camera. This results in bulky equipment which cannot be used 15. in drain pipes, and to reduce size it has been proposed to locate the signal amplifier above ground level and connect it ko the camera and scannin~ circuit by a co-axial television cable. This must be of sufficient length to allow the camera to be drawn into a drain pipe, and a cable of less than one 20. hundred feet (thirty metres) would be quite inconvenient.
However, such a TV cable is not capable of delivering the signals with the required degree of clarity. It is estimated that about 50% of clarity is lost because of this diqability.
BRIEF SUMMARY OF THE INVENTION
25. The invention includes a television camera, scanner and amplifier all in water proof housings which are close to one another and in tandem. The camera has illuminating lamps coupled to it arranged to illuminate a space forwardly :
.
.
8i~93 of the lens. An elongate television cable couples the scanner to a television readout screen. The housings are arranged so that they can be moved through a bend or a te~ of a standard four inch salt-glazed sewer pipe.
5. More specifically, -the inVentiQn consists of a television camera, and a waterproof camera housing containing the camera, a scanner having electronic components interconnected in a scanning circuit, and a waterproof scanner housing containing the scanner, an amplifier having electronic components inter-10. connected in an amplifier circuit, and a waterpxoof amplifier housing containing the amplifier, the shape, cross-sectional size and length of each said housing being such that it can be moved through a bend or tee in a standard four-inch salt-glazed sewer pipe, flexible cables and flexible tension members 15. interconnecting said camera, scanner and amplifier in tandem and closely spaced from one another, illuminating lamps arran-ged to illuminate a space forwardly of said camera and means coupling the illuminating lamps to the camera, and a television readout screen, and an elongate television cable extending
5. BACKGROUND OF THE INVENTION
Some drain pipes which are used are salt glazed sewer pipes and have an inside diameter of four inches (100 mm) or thereabouts, and are constructed to a standard. Most tele-vision cameras are of such length that they are not able to 10. negotiate standard bends or tees in pipes of this dimension.
A television camera has associated with it two separate cir-cuits, namely a scanning circuit and a signalling amplifier circuit, both of which are usually adjacent the television camera. This results in bulky equipment which cannot be used 15. in drain pipes, and to reduce size it has been proposed to locate the signal amplifier above ground level and connect it ko the camera and scannin~ circuit by a co-axial television cable. This must be of sufficient length to allow the camera to be drawn into a drain pipe, and a cable of less than one 20. hundred feet (thirty metres) would be quite inconvenient.
However, such a TV cable is not capable of delivering the signals with the required degree of clarity. It is estimated that about 50% of clarity is lost because of this diqability.
BRIEF SUMMARY OF THE INVENTION
25. The invention includes a television camera, scanner and amplifier all in water proof housings which are close to one another and in tandem. The camera has illuminating lamps coupled to it arranged to illuminate a space forwardly :
.
.
8i~93 of the lens. An elongate television cable couples the scanner to a television readout screen. The housings are arranged so that they can be moved through a bend or a te~ of a standard four inch salt-glazed sewer pipe.
5. More specifically, -the inVentiQn consists of a television camera, and a waterproof camera housing containing the camera, a scanner having electronic components interconnected in a scanning circuit, and a waterproof scanner housing containing the scanner, an amplifier having electronic components inter-10. connected in an amplifier circuit, and a waterpxoof amplifier housing containing the amplifier, the shape, cross-sectional size and length of each said housing being such that it can be moved through a bend or tee in a standard four-inch salt-glazed sewer pipe, flexible cables and flexible tension members 15. interconnecting said camera, scanner and amplifier in tandem and closely spaced from one another, illuminating lamps arran-ged to illuminate a space forwardly of said camera and means coupling the illuminating lamps to the camera, and a television readout screen, and an elongate television cable extending
2~. from said amplifier to said readout screen.
In most instances the housings are of stainless steel and are interconnected by flexible cables so that each housing is spaced from the next by a distance equal to between one housing length and a half housing length, this being the most 25. suitable length for each housing to pull the next past a bend in a four-inch sewer pipe, or into a pipe line through a tee branch thereof. ~Iowever, the housing can itself be a flexible ~L8g~93 wall tube containing the electronic components, and being a "tail" of the camera housing. In some instances it is possible for the scanner housing and the amplifier housing to be a sin-gle housing.
5. The illumination means can be lamps attached to the camera housing, to the scanner housing to shine over and beyond the camera, or to a further housing in front of the camera housing and coupled thereto by a cable.
The cable in being on the output side of the amplifier 10. is capable of delivering a relatively clear image to the tele-vision screen. The device therefore becomes useful in the inspection of sewer pipes, drain pipes and the like, but its use can also be extended to other inspection requirements, for example chemical apparatus, sub-terrainian bore holes and the 15. like.
BRIEF DESCRIPTION OF THE DRAWINGS
An embodiment of the invention is described hereunder in some detail with reference to and is illustrated in the accom-panying drawings, in which 20. Fig. l is a diagrammatic sectional view showing the in-spection apparatus in use in a drain pipe line, Fig. 2 is an enlarged side elevational view showing the camera housing and portion of the scanner housing, Fig. 3 is an enlarged partly sectional view showing a water 25. proof plug for connecting to the elongate co-axial television cable, Fig. 4 is a front elevation of Fig. 2, Fig. 5 is a fragmentary perspective view according to L8~93 a second embodiment wherein the illuminating lamps are carried on the scanner housing, and Fig. 6 is a fragmentary perspective view according to a third embodiment wherein the illuminating lamps are carried 5. on a separate lamp housing.
In each embodiment use is made of a camera 10 produced by the Japanese manufacturer IKEGAMI, and identified as model CTC-2100. Such a camera includes as standard equipment two electrical component boards, the first being a scanner 11 10. having electronic components 12 interconnected in a scanning circuit, and the second being an amplifier 13 having electronic components 14 interconnected in an amplifier circuit.
The camera lens, focusing adjustment, and optical sensing apparatus is comprised in a camera housing 16. The camera 15. housing 16 is a substantially cylindrical member having a pair of lamps contained in bosses 18 at its farward end, and the forward end contains a threaded aperture which itself receives a ring having a lens shield thereon, the ring being screwed in against a resilient O ring seal (not herein illus-20. trated). The lamps 17 are arranged to be positioned above and on each side of the vidicon tube, and below the lens there are provided mounting means to which is connected a bridle 19 of a draw cable 20~ The draw cable 20 extends through a pipe line 21 and is coupled to a winch 22 which is used for pulling 25. the housing through the pipe line. The draw cable 20 is first located in the pipe line 21 by known means, for example, attach-ing to a hose having a high pressure water jet at its forward end, used to penetrate a pipe, which may otherwise be blocked.
B~ '33 The scanner 11 is contained wi-thin a waterproof scanner housing 25 which is also made of stainless steel, and the amplifier 13 is contained within a waterproof amplifier housing 26, again made of stainless steel.
5. As shown best in Fig. 2, the rear end of the camera housing 16 is provided with a "tail" 28, and each end of the scanner housing 25 is also provided with a "tail", and these tails have secured to them the ends of a relatively small diameter flexible tube 29, clamped in place by clamps 30.
10. The tube 29 functions as a tension member so that as the draw cable 20 pulls the camera housing 16 through the pipe line 21, the tension extends to the housings 25 and 26. A
flexible multicored electrical cable 31 interconnects the camera 10 and the electrical components 12 of the scanner, 15. and the same arrangement interconnects the electrical componants 14 of the amplifier.
An elongate coaxial television cable 34 is connected b~v a plug assembly 35 to the amplifier 13, and joins the amplifier 13 to a television monitor tube 36. The plug assembl~ 35 is 20. shown in Fig. 3 and includes a third male portion 37 thread-ably engaged by a nut 38 and a sealing ring 39 and spacer 40 interposed between the elements effect a water seal.
In this embodiment the three housings are independent from one another~ and the length of the two joining cables 25. 29 is about three-quarters of the length of any one of the housings, this being found to be a convenient length which facilitates movement of the housings passing through a bend or through the branch pipe of a tee of a standard four-inch salt-glazed sewer pipe. As said above, in some other embodi-ments the scanner and amplifier can be contained in a flexi-ble tube joined as a "tail" to the camera housing 16, or both can be contained within a single housing, but neither arrange-ment is described~herein.
As shown in Fig. 1, the pipe line 21 is provided with two standard tees 4~ and 45 with upstanding branches 46 known as "inspection pipes". The train of housings 16, 25 and 26 can be easily fed into the pipe line 21 through such inspec-tion pipes.
10. The second embodiment of Fig. 5 is similar to the first, excepting that the scanner housing (in Fig. 5 designated 47) is a bullet-nose housing and contains two lamps 48 which will shine past the camera housing 16 and illuminate the pipe in front o the camera 10. Another slight variation illustrated 15. in Fig. 5 is the use oE stainless steel tension wires 49 in lleu of the flexible tube 29, the wires 49 being located one on each side of the flexible cable 31.
The third embodiment of Fig. 6 is varied slightly, in that the bridle 19 is coupled by a cable 51 to a lamp housing 20. 52 disposed forwardly of the camera housing 16 and containing two lamps 53 for illuminating the interior wall of the pipe line 21. The cable 31 is contained within a stainless steel bordered tube 54 which functions as a tension member and takes the place of the tension member 29.
25. It has been found that the results achieved provide a much clearer image on the television screen than can be achieved by a prior art type device, and the device is useful in many circumstances where prior art cameras cannot be inserted because of their bulk.
The above embodiment has been described with respect to a four-inch salt-glaze(l sewer pipe. Clearly the embodiment is equally applicable to drain pipes made from plastics or other materials, wherein the interior dimensions and shapes 5. are similar.
In most instances the housings are of stainless steel and are interconnected by flexible cables so that each housing is spaced from the next by a distance equal to between one housing length and a half housing length, this being the most 25. suitable length for each housing to pull the next past a bend in a four-inch sewer pipe, or into a pipe line through a tee branch thereof. ~Iowever, the housing can itself be a flexible ~L8g~93 wall tube containing the electronic components, and being a "tail" of the camera housing. In some instances it is possible for the scanner housing and the amplifier housing to be a sin-gle housing.
5. The illumination means can be lamps attached to the camera housing, to the scanner housing to shine over and beyond the camera, or to a further housing in front of the camera housing and coupled thereto by a cable.
The cable in being on the output side of the amplifier 10. is capable of delivering a relatively clear image to the tele-vision screen. The device therefore becomes useful in the inspection of sewer pipes, drain pipes and the like, but its use can also be extended to other inspection requirements, for example chemical apparatus, sub-terrainian bore holes and the 15. like.
BRIEF DESCRIPTION OF THE DRAWINGS
An embodiment of the invention is described hereunder in some detail with reference to and is illustrated in the accom-panying drawings, in which 20. Fig. l is a diagrammatic sectional view showing the in-spection apparatus in use in a drain pipe line, Fig. 2 is an enlarged side elevational view showing the camera housing and portion of the scanner housing, Fig. 3 is an enlarged partly sectional view showing a water 25. proof plug for connecting to the elongate co-axial television cable, Fig. 4 is a front elevation of Fig. 2, Fig. 5 is a fragmentary perspective view according to L8~93 a second embodiment wherein the illuminating lamps are carried on the scanner housing, and Fig. 6 is a fragmentary perspective view according to a third embodiment wherein the illuminating lamps are carried 5. on a separate lamp housing.
In each embodiment use is made of a camera 10 produced by the Japanese manufacturer IKEGAMI, and identified as model CTC-2100. Such a camera includes as standard equipment two electrical component boards, the first being a scanner 11 10. having electronic components 12 interconnected in a scanning circuit, and the second being an amplifier 13 having electronic components 14 interconnected in an amplifier circuit.
The camera lens, focusing adjustment, and optical sensing apparatus is comprised in a camera housing 16. The camera 15. housing 16 is a substantially cylindrical member having a pair of lamps contained in bosses 18 at its farward end, and the forward end contains a threaded aperture which itself receives a ring having a lens shield thereon, the ring being screwed in against a resilient O ring seal (not herein illus-20. trated). The lamps 17 are arranged to be positioned above and on each side of the vidicon tube, and below the lens there are provided mounting means to which is connected a bridle 19 of a draw cable 20~ The draw cable 20 extends through a pipe line 21 and is coupled to a winch 22 which is used for pulling 25. the housing through the pipe line. The draw cable 20 is first located in the pipe line 21 by known means, for example, attach-ing to a hose having a high pressure water jet at its forward end, used to penetrate a pipe, which may otherwise be blocked.
B~ '33 The scanner 11 is contained wi-thin a waterproof scanner housing 25 which is also made of stainless steel, and the amplifier 13 is contained within a waterproof amplifier housing 26, again made of stainless steel.
5. As shown best in Fig. 2, the rear end of the camera housing 16 is provided with a "tail" 28, and each end of the scanner housing 25 is also provided with a "tail", and these tails have secured to them the ends of a relatively small diameter flexible tube 29, clamped in place by clamps 30.
10. The tube 29 functions as a tension member so that as the draw cable 20 pulls the camera housing 16 through the pipe line 21, the tension extends to the housings 25 and 26. A
flexible multicored electrical cable 31 interconnects the camera 10 and the electrical components 12 of the scanner, 15. and the same arrangement interconnects the electrical componants 14 of the amplifier.
An elongate coaxial television cable 34 is connected b~v a plug assembly 35 to the amplifier 13, and joins the amplifier 13 to a television monitor tube 36. The plug assembl~ 35 is 20. shown in Fig. 3 and includes a third male portion 37 thread-ably engaged by a nut 38 and a sealing ring 39 and spacer 40 interposed between the elements effect a water seal.
In this embodiment the three housings are independent from one another~ and the length of the two joining cables 25. 29 is about three-quarters of the length of any one of the housings, this being found to be a convenient length which facilitates movement of the housings passing through a bend or through the branch pipe of a tee of a standard four-inch salt-glazed sewer pipe. As said above, in some other embodi-ments the scanner and amplifier can be contained in a flexi-ble tube joined as a "tail" to the camera housing 16, or both can be contained within a single housing, but neither arrange-ment is described~herein.
As shown in Fig. 1, the pipe line 21 is provided with two standard tees 4~ and 45 with upstanding branches 46 known as "inspection pipes". The train of housings 16, 25 and 26 can be easily fed into the pipe line 21 through such inspec-tion pipes.
10. The second embodiment of Fig. 5 is similar to the first, excepting that the scanner housing (in Fig. 5 designated 47) is a bullet-nose housing and contains two lamps 48 which will shine past the camera housing 16 and illuminate the pipe in front o the camera 10. Another slight variation illustrated 15. in Fig. 5 is the use oE stainless steel tension wires 49 in lleu of the flexible tube 29, the wires 49 being located one on each side of the flexible cable 31.
The third embodiment of Fig. 6 is varied slightly, in that the bridle 19 is coupled by a cable 51 to a lamp housing 20. 52 disposed forwardly of the camera housing 16 and containing two lamps 53 for illuminating the interior wall of the pipe line 21. The cable 31 is contained within a stainless steel bordered tube 54 which functions as a tension member and takes the place of the tension member 29.
25. It has been found that the results achieved provide a much clearer image on the television screen than can be achieved by a prior art type device, and the device is useful in many circumstances where prior art cameras cannot be inserted because of their bulk.
The above embodiment has been described with respect to a four-inch salt-glaze(l sewer pipe. Clearly the embodiment is equally applicable to drain pipes made from plastics or other materials, wherein the interior dimensions and shapes 5. are similar.
Claims (10)
1. Closed circuit television inspection apparatus useable for pipe inspection comprising:
a television camera, and a water-proof camera housing containing the camera, a scanner having electronic components interconnected in a scanning circuit, and a water-proof scanner housing contain-ing the scanner, an amplifier having electronic components interconnected in an amplifier circuit, and a water-proof amplifier housing containing the amplifier, the shape, cross-sectional size and length of each said housing being such that it can be moved through a bend or tee in a standard four-inch salt-glazed sewer pipe, flexible cables and flexible tension members interconnect-ing said camera, scanner and amplifier in tandem and closely spaced from one another, illuminating lamps arranged to illuminate a space for-wardly of said camera and means coupling the illuminating lamps to the camera, and a television readout screen, and an elongate television cable extending from said amplifier to said readout screen.
a television camera, and a water-proof camera housing containing the camera, a scanner having electronic components interconnected in a scanning circuit, and a water-proof scanner housing contain-ing the scanner, an amplifier having electronic components interconnected in an amplifier circuit, and a water-proof amplifier housing containing the amplifier, the shape, cross-sectional size and length of each said housing being such that it can be moved through a bend or tee in a standard four-inch salt-glazed sewer pipe, flexible cables and flexible tension members interconnect-ing said camera, scanner and amplifier in tandem and closely spaced from one another, illuminating lamps arranged to illuminate a space for-wardly of said camera and means coupling the illuminating lamps to the camera, and a television readout screen, and an elongate television cable extending from said amplifier to said readout screen.
2. Closed circuit television inspection apparatus accor-ding to claim 1 wherein said camera housing, scanner housing and amplifier housing are all separate housings and of rigid construction.
3. Closed circuit television inspection apparatus accor-ding to claim 2 wherein each said housing comprises stainless steel.
4. Closed circuit television inspection apparatus accor-ding to claim 1 wherein each said tension member is a flexible plastics tube surrounding a respective one of said flexible cables.
5. Closed circuit television inspection apparatus according to claim 1 wherein each said tension member is a flexible tube of braided metal surrounding a respective one of said flexible cables.
6. Closed circuit television inspection apparatus according to claim 1 wherein each said tension member is a flexible wire extending between a pair of said housings.
7. Closed circuit television inspection apparatus according to claim 1 wherein said camera housing comprises bosses and said lamps are contained in said bosses.
8. Closed circuit television inspection apparatus according to claim 2 wherein said lamps are contained in said scanner housing.
9. Closed circuit television inspection apparatus according to claim 1 further comprising a lamp housing positioned forwardly of said camera housing, and wherein said lamps are contained in said lamp housing.
10. Closed circuit television inspection apparatus according to claim 1 further comprising a draw cable, and means connecting one end of the draw cable to the camera housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPD4438 | 1978-05-19 | ||
| AUPD443878 | 1978-05-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1118093A true CA1118093A (en) | 1982-02-09 |
Family
ID=3767566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000327800A Expired CA1118093A (en) | 1978-05-19 | 1979-05-15 | Pipe inspection apparatue |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4246604A (en) |
| CA (1) | CA1118093A (en) |
| GB (1) | GB2021351A (en) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2166214B (en) * | 1984-10-25 | 1988-02-24 | Atomic Energy Authority Uk | Transport apparatus |
| GB8429339D0 (en) * | 1984-11-21 | 1985-01-03 | Edgealpha Ltd | Pipeline inspection apparatus |
| US4651558A (en) * | 1985-09-13 | 1987-03-24 | Cues, Inc. | Method and apparatus for inspecting lateral lines |
| USRE33160E (en) * | 1985-09-13 | 1990-02-06 | Cues, Inc. | Method and apparatus for inspecting lateral lines |
| US4695881A (en) * | 1985-12-16 | 1987-09-22 | Kennedy Jesse R | Apparatus for imaging infrared emitting surfaces |
| GB2190722A (en) * | 1986-05-20 | 1987-11-25 | British Nuclear Fuels Plc | Pipework inspection apparatus |
| US4974168A (en) * | 1988-04-19 | 1990-11-27 | Cherne Industries, Inc. | Automatic pipeline data collection and display system |
| GB2242497B (en) * | 1990-03-31 | 1992-08-12 | Stc Plc | Pipe inspection system |
| US5202944A (en) * | 1990-06-15 | 1993-04-13 | Westech Geophysical, Inc. | Communication and power cable |
| US5140319A (en) * | 1990-06-15 | 1992-08-18 | Westech Geophysical, Inc. | Video logging system having remote power source |
| US5663758A (en) * | 1993-04-05 | 1997-09-02 | Dhv International, Inc. | Instrument probe having a back-lighted camera |
| US5457288A (en) * | 1994-02-22 | 1995-10-10 | Olsson; Mark S. | Dual push-cable for pipe inspection |
| US5992247A (en) | 1998-04-23 | 1999-11-30 | Aries Industries Incorporated | Apparatus for inspecting lateral sewer pipes |
| US6313869B1 (en) | 1999-03-09 | 2001-11-06 | Edward J. Hyp | J nozzle articulating camera system |
| US8054459B2 (en) | 1999-05-04 | 2011-11-08 | Envirosight Llc | Inspection system and method |
| US7480041B2 (en) * | 1999-05-04 | 2009-01-20 | Envirosight Llc | Inspection system and method |
| CA2309018A1 (en) * | 2000-05-12 | 2001-11-12 | R. Michael Mcgrew | Improved apparatus for inspecting lateral sewer pipes |
| US6832164B1 (en) * | 2001-11-20 | 2004-12-14 | Alfred Stella | Sewerage pipe inspection vehicle having a gas sensor |
| US7073979B2 (en) * | 2003-11-26 | 2006-07-11 | Aries Industries Incorporated | Method and apparatus for performing sewer maintenance with a thermal sensor |
| US7551197B2 (en) * | 2005-09-08 | 2009-06-23 | Ulc Robotics, Inc. | Pipeline inspection system |
| DE102008021949B4 (en) * | 2008-05-02 | 2010-08-19 | Optronic Pascal Riezler | System for cleaning a canal |
| US10373470B2 (en) | 2013-04-29 | 2019-08-06 | Intelliview Technologies, Inc. | Object detection |
| CA2847707C (en) | 2014-03-28 | 2021-03-30 | Intelliview Technologies Inc. | Leak detection |
| US10221988B2 (en) * | 2014-05-03 | 2019-03-05 | V-Tech Bv | Channeled tube inspection device |
| US10943357B2 (en) | 2014-08-19 | 2021-03-09 | Intelliview Technologies Inc. | Video based indoor leak detection |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3499107A (en) * | 1954-03-11 | 1970-03-03 | Sheldon Edward E | Light transfer devices using light conducting members of multilayered construction and photoelectric means |
| GB1097585A (en) * | 1963-10-30 | 1968-01-03 | Pye Ltd | Improvements in or relating to television cameras |
| US3885091A (en) * | 1973-10-24 | 1975-05-20 | Halliburton Co | Method and apparatus for pipeline inspection |
-
1979
- 1979-05-15 CA CA000327800A patent/CA1118093A/en not_active Expired
- 1979-05-18 US US06/040,280 patent/US4246604A/en not_active Expired - Lifetime
- 1979-05-18 GB GB7917330A patent/GB2021351A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US4246604A (en) | 1981-01-20 |
| GB2021351A (en) | 1979-11-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |