US3907253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe guide means for a rod and pipe pusher
Assignee: McLaughlin Manufacturing Co Inc
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Filing: 1974-06-24
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Granted: 1975-09-23
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Expires: 1994-06-24
Abstract
Abstract A device for maintaining a pipe in straight and proper alignment in a pipe or rod-pushing machine which is used to push a pipe or rod under a finished surface such as a driveway or street. The device comprises, generally, an upper spring loaded roller guide and a lower adjustably fixed roller guide at the front and back ends of a conventional pipe pusher of the type generally attached to a standard tractor-mounted hydraulic backhoe.
Inventors
- 👤 William O Schosek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:02
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/10; E02F3/00; E02F3/04; E02F3/96; E02F3/963; E21; E21B; E21B19/00; E21B19/24; E21B7/00; E21B7/04; E21B7/046
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
211 words
A pipe guide means for attachment to a rod and pipe pusher of the type which is used to push a rod or pipe under finished surfaces such as a driveway, street, etc., the pusher being reversably actuated by a conventional power means while positioned in an operating trench on one side of the finished surface with a target trench on the opposed side thereof, the rod or pipe being in coupled sections, said guide means comprising; a. front and rear guide assemblies attached relative to the front and rear ends of the rod and pipe pusher, each including, 1. an upper roller provided with an annular groove, 2. a lower roller provided with an annular groove, said upper and lower annular grooves being laterally rounded in cross sections to generally conform with the radius of a rod or pipe passing therebetween; b. means to journal said upper and lower rollers; c. means to maintain said upper and lower rollers in alignment in a generally vertical plane; d. means to adjust said lower roller upwardly and downwardly in said vertical plane; e. compression means to normally maintain said top roller in a predetermined position and permitting a limited degree of upward movement thereof when a rod or pipe coupler passes therebetween.
Claim 2
Dependent Claim
211 words
A pipe guide means for attachment to a rod and pipe pusher of the type which is used to push a rod or pipe under finished surfaces such as a driveway, street, etc., the pusher being reversably actuated by a conventional power means while positioned in an operating trench on one side of the finished surface with a target trench on the opposed side thereof, the rod or pipe being in coupled sections, said guide means comprising; a. front and rear guide assemblies attached relative to the front and rear ends of the rod and pipe pusher, each including, 1. an upper roller provided with an annular groove, 2. a lower roller provided with an annular groove, said upper and lower annular grooves being laterally rounded in cross sections to generally conform with the radius of a rod or pipe passing therebetween; b. means to journal said upper and lower rollers; c. means to maintain said upper and lower rollers in alignment in a generally vertical plane; d. means to adjust said lower roller upwardly and downwardly in said vertical plane; e. compression means to normally maintain said top roller in a predetermined position and permitting a limited degree of upward movement thereof when a rod or pipe coupler passes therebetween.
Claim 3
Dependent Claim
102 words
a lower roller provided with an annular groove, said upper and lower annular grooves being laterally rounded in cross sections to generally conform with the radius of a rod or pipe passing therebetween; b. means to journal said upper and lower rollers; c. means to maintain said upper and lower rollers in alignment in a generally vertical plane; d. means to adjust said lower roller upwardly and downwardly in said vertical plane; e. compression means to normally maintain said top roller in a predetermined position and permitting a limited degree of upward movement thereof when a rod or pipe coupler passes therebetween.
Claim 4
Dependent Claim
102 words
a lower roller provided with an annular groove, said upper and lower annular grooves being laterally rounded in cross sections to generally conform with the radius of a rod or pipe passing therebetween; b. means to journal said upper and lower rollers; c. means to maintain said upper and lower rollers in alignment in a generally vertical plane; d. means to adjust said lower roller upwardly and downwardly in said vertical plane; e. compression means to normally maintain said top roller in a predetermined position and permitting a limited degree of upward movement thereof when a rod or pipe coupler passes therebetween.
Claim 5
Dependent Claim
43 words
The pipe guide means as defined in claim 1 wherein said means to journal comprises a journal rod extending through each of said rollers and a pair of side blocks extending outwardly from opposed ends of each of said upper and lower rollers.
Claim 6
Dependent Claim
31 words
The pipe guide means as defined in claim 2 wherein said means to maintain comprises a pair of vertically extending screwthreaded shafts extending freely through the respective pairs of side blocks.
Claim 7
Dependent Claim
39 words
The pipe guide means as defined in claim 3 wherein said means to adjust comprises a pair of nuts threadably engaged on the respective screwthreaded shafts in engagement with the bottoms of the pair of the lower side blocks.
Claim 8
Dependent Claim
36 words
The pipe guide means as defined in claim 3 including a pair of nuts, fixed relative to the bottom of said rod and pipe pusher, to threadably receive the bottom ends of the respective screwthreaded shafts.
Claim 9
Dependent Claim
36 words
The pipe guide means as defined in claim 2 including vertical channel guides fixed to and opening inwardly from the respective sides of the pipe pusher to slidably journal outward extensions from said upper side blocker.
Claim 10
Dependent Claim
27 words
The pipe guide means as defined in claim 6 including stop means fixed relative to said channel guides to limit the downward movement of said upper roller.
Claim 11
Dependent Claim
38 words
The pipe guide means as defined in claim 3 wherein said compression means comprises a compression spring interposed between the top of each of said upper side blocks, and a nut threaded onto each of said screwthreaded shafts.
Claim 12
Dependent Claim
32 words
The pipe guide means as defined in claim 1 including a U-shaped channel assembly fixed relative to the rear end of the rod and pipe pusher to support said rear guide assembly.
References Cited (Backward Citations)
US3645502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |