Measuring and testing – Speed – velocity – or acceleration – With means for retaining reading
Patent
1988-08-17
1989-09-19
Levy, Stewart J.
Measuring and testing
Speed, velocity, or acceleration
With means for retaining reading
738665, 33178F, 33 1N, G01B 512, G01B 520
Patent
active
048669784
ABSTRACT:
A method and device for inspecting the internal cross-sectional shape of pipes, and particularly of sewer pipes. A mandrel is inserted into the pipe. The mandrel may include an elastomeric member providing a fluid seal engaging the internal pipe surface. The mandrel also has a retrieval chord attached thereto and trailing therebehind. A plug member is provided behind the mandrel, which may be inflatably expanded to define a second fluid seal with the pipe. The space between the pipe and the two fluid seals is pressurized, such as with compressed air, causing the mandrel to advance along the pipe, pulling the retrieval chord as it advances. The mandrel's advancement will be stopped by a sufficiently large deformation. Thereafter, the mandrel is retrieved by pulling on the retrieval chord.
REFERENCES:
patent: 2686039 (1954-08-01), Bender
patent: 2782370 (1957-02-01), Ver Nooy
patent: 2953919 (1960-09-01), Potts
patent: 3024651 (1962-03-01), McGlasson
patent: 3518873 (1970-07-01), Iglehart et al.
patent: 3755908 (1973-09-01), VerNooy
patent: 3973441 (1976-08-01), Porter
patent: 4000655 (1977-01-01), Jones
patent: 4091678 (1978-05-01), Potter
patent: 4098126 (1978-07-01), Howard
patent: 4170902 (1979-10-01), Pallan
patent: 4274206 (1981-06-01), Moolenaar
patent: 4354379 (1982-10-01), Miner
patent: 4402213 (1983-09-01), Hogan
patent: 4702010 (1987-10-01), Elbracht
Recommended Standards for Sewage Works, 1978 Edition, A Report of the Committee of the Great Lakes-Upper Mississippi River Board of State Sanitary Engineers.
Standard Recommended Practice for Underground Installation of Flexible Thermoplastic Sewer Pipe, published by American National Standard-Undated.
Municipal Products and Mechanical Plugs Brochure by Cherne Industries, Inc. dated 1985, for Single-Size Muni-Ball Plugs, cover sheet and p. 7.
The Wortco 9-Arm Deflection Mandrel Brochure by Wortco, Inc.-Undated.
Levy Stewart J.
Simons Michele
LandOfFree
Pipe inspection method and device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pipe inspection method and device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pipe inspection method and device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-360490