US3774481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe tight all
Assignee: Individual
•
Filing: 1971-01-21
•
Granted: 1973-11-27
•
Expires: 1991-01-21
Abstract
Abstract A wrench for grasping pipes and tightening the same, the wrench including a hollow handle with an electric motor therein that is powered externally by means of an extension cord and plug leading from the handle, the motor driving rotationally a pair of toothed rollers between which there is a saddle into which a pipe is fitted for being rotated by the toothed rollers, the pipe being held tightly against the two toothed rollers by means of a swivel linked belt that carries freely rotatable rollers bearing against the surface of the pipe.
Inventors
- 👤 E Goodman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:55
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/48; B25B13/50; B25B13/5008; B25B13/5016; B25B13/52; B25B21/00; B25B21/002
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
A self-powered pipe wrench comprising a housing, an electric drive motor mounted in said housing, a pair of rollers rotatably mounted in said housing for rotation about parallel axes, means driven by said motor for rotating said rollers, a strap for engaging and retaining a pipe in position for rotation with its axis parallel with the axes of the rollers, said strap having one end secured to the housing and extending outwardly over said rollers and a positioned pipe, the other end of said strap being releasably secured to said housing so as to be openable to receive a pipe for engagement and to retain the pipe against movement away from said rollers upon subsequent closing, and means drivingly connecting the peripheries of said rollers with the periphery of the pipe to impart rotation to the pipe in response to rotation of said rollers.
Claim 2
Dependent Claim
144 words
A self-powered pipe wrench comprising a housing, an electric drive motor mounted in said housing, a pair of rollers rotatably mounted in said housing for rotation about parallel axes, means driven by said motor for rotating said rollers, a strap for engaging and retaining a pipe in position for rotation with its axis parallel with the axes of the rollers, said strap having one end secured to the housing and extending outwardly over said rollers and a positioned pipe, the other end of said strap being releasably secured to said housing so as to be openable to receive a pipe for engagement and to retain the pipe against movement away from said rollers upon subsequent closing, and means drivingly connecting the peripheries of said rollers with the periphery of the pipe to impart rotation to the pipe in response to rotation of said rollers.
Claim 3
Dependent Claim
31 words
A self-powered pipe wrench according to claim 1 and characterized further in that said other end of said strap is adjustably secured to said housing to accommodate pipes of different diameters.
Claim 4
Dependent Claim
33 words
A self-powered pipe wrench according to claim 2 and characterized further in that said strap carries a plurality of rollers positioned for contact with a pipe to allow pipe rotation during engagement thereof.
References Cited (Backward Citations)
CA860013A
Cited
US2400712A
Cited
US2576203A
Cited
US2746329A
Cited
US3016775A
Cited
US3521509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |