US3692135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-propelled pipe cart
Assignee: Individual
•
Filing: 1970-06-01
•
Granted: 1972-09-19
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Expires: 1990-06-01
Abstract
Abstract Self-propelled pipe cart adapted to carry lengths of pipe comprises a frame having a platform and wheels mounted on said frame. Each wheel is driven by a separate hydraulic motor, preferably mounted on a floating axle.
Inventors
- 👤 Paul Holzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:58
CPC Classifications
B; B62; B62D; B62D51/00; B62D51/04; B62D51/06; B60; B60P; B60P3/00; B60P3/40; B60P3/41
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
Self-propelled irrigation pipe cart which comprises elongated frame means having a platform receiving and carrying lengths of irrigation pipe; a pair of axially-aligned wheels each provided with a hollow axle and rotatably affixed on said frame by means of said hollow axle; a hydraulic motor mounted on said frame in the proximity of each wheel and driveably engaging said wheel through said hollow axle; control means for said hydraulic motors; and prime mover means mounted on said frame and driving said hydraulic motors.
Claim 2
Dependent Claim
83 words
Self-propelled irrigation pipe cart which comprises elongated frame means having a platform receiving and carrying lengths of irrigation pipe; a pair of axially-aligned wheels each provided with a hollow axle and rotatably affixed on said frame by means of said hollow axle; a hydraulic motor mounted on said frame in the proximity of each wheel and driveably engaging said wheel through said hollow axle; control means for said hydraulic motors; and prime mover means mounted on said frame and driving said hydraulic motors.
Claim 3
Dependent Claim
31 words
The pipe cart in accordance with claim 1 wherein the hydraulic motors are connected in a parallel hydraulic circuit and are adapted to be driven by a common prime mover means.
Claim 4
Dependent Claim
24 words
The pipe cart in accordance with claim 1 wherein a plurality of members having a serrated upper edge are transversely mounted on said platform.
Claim 5
Dependent Claim
34 words
The pipe cart in accordance with claim 1 wherein said frame is equipped with a handle bar at an end of said platform, said handle bar extending substantially the entire width of said platform.
Claim 6
Dependent Claim
42 words
The pipe cart in accordance with claim 1 wherein each hollow axle is journaled within a stationary hub mounted on said frame means and wherein a drive shaft of each hydraulic motor engages one of said hollow axles in a torque-transmitting relationship.
Claim 7
Dependent Claim
50 words
The pipe cart in accordance with claim 5 wherein each said stationary hub is provided with an inner annular recess and said hollow axle is retained in said stationary hub by means of a ring nut situated within said recess and threadedly engaging the innermost end of said hollow axle.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |