Patent US3645502A successfully refreshed from Google Patents.
US3645502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rod and pipe pusher and puller
Assignee: Individual
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Filing: 1969-08-08
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Granted: 1972-02-29
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Expires: 1989-08-08
Abstract
Abstract A device for pushing and pulling pipe or rod through the ground having a gripping plate connected to a lever arm mounted for reciprocating movement by swinging movement of the lever arm. An opening is provided in the gripping plate for insertion of the pipe or rod therethrough, and the gripping plate is maintained in tilted position by a spring which may be connected between the bottom of the plate and either end of the pusher and puller frame depending on the desired direction of tilt for pushing or pulling the pipe or rod in either direction.
Inventors
- 👤 Charles Stromp Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:20
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/046
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
198 words
A device for pushing and pulling pipe or rod comprising a frame, a lever, means mounting said lever on said frame for reciprocating movement, a gripping plate pivotally connected to said lever for movement therewith, said gripping plate having an opening therethrough for passage of the pipe or rod, and spring means for biasing said gripping plate to a tilted position for providing positive gripping engagement of an edge portion of said opening with the pipe or rod during movement of said gripping plate in the direction of tilt, said means mounting said lever for reciprocating movement comprising a lever arm having a yoke at one end, said frame having a pair of vertical sides, said yoke being received between said sides, pin means pivotally connecting said yoke to said sides, said one end of said lever received in said yoke on said sides, said one end of said lever received in said yoke on said lever arm and pivotally connected thereto, the other end of said lever having a yoke for receipt of one end of said gripping plate and pivotally connected thereto, and the other end of said gripping plate having said spring means connected thereto.
Claim 2
Independent Claim
198 words
A device for pushing and pulling pipe or rod comprising a frame, a lever, means mounting said lever on said frame for reciprocating movement, a gripping plate pivotally connected to said lever for movement therewith, said gripping plate having an opening therethrough for passage of the pipe or rod, and spring means for biasing said gripping plate to a tilted position for providing positive gripping engagement of an edge portion of said opening with the pipe or rod during movement of said gripping plate in the direction of tilt, said means mounting said lever for reciprocating movement comprising a lever arm having a yoke at one end, said frame having a pair of vertical sides, said yoke being received between said sides, pin means pivotally connecting said yoke to said sides, said one end of said lever received in said yoke on said sides, said one end of said lever received in said yoke on said lever arm and pivotally connected thereto, the other end of said lever having a yoke for receipt of one end of said gripping plate and pivotally connected thereto, and the other end of said gripping plate having said spring means connected thereto.
Claim 3
Dependent Claim
22 words
The device of claim 1 wherein there are two of said spring means pivotally connected to opposite sides of said gripping plate.
Claim 4
Dependent Claim
14 words
The device of claim 1 wherein said opening in said gripping plate is round.
Claim 5
Dependent Claim
14 words
The device of claim 1 wherein said opening in said gripping plate is diamond-shaped.
Claim 6
Dependent Claim
61 words
The device of claim 1 further comprising a pair of vertically spaced guide rollers at opposite ends of said frame for supporting and guiding the pipe or rod during movement through said opening, the upper roller of each pair being generally cylindrical and the lower roller of each pair being contoured to conform to the shape of the pipe or rod.
Claim 7
Dependent Claim
65 words
The device of claim 1 wherein said spring means has a pivotal connection with said gripping plate permitting said spring means to be connected to either end of said frame without disconnecting said spring means from said gripping plate for tilting said gripping plate in opposite directions to grip the pipe or rod for movement in either direction without changing the location of said device.
Claim 8
Dependent Claim
43 words
The device of claim 6 wherein said gripping plate has a horizontal pin projecting from one side of said gripping plat about which one end of said spriNg means is looped to provide said pivotal connection between said spring means and gripping plate.
Claim 9
Dependent Claim
51 words
The device of claim 7 wherein said gripping plate has horizontal pins projecting from opposite sides of said gripping plate, and there are two of said spring means having one of their ends looped around said pins to provide pivotal connections between both of said spring means and said gripping plate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |