US3815689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power digger for landscape gardeners
Assignee: Individual
•
Filing: 1973-04-25
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Granted: 1974-06-11
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Expires: 1993-04-25
Abstract
Abstract A highly maneuverable power driven implement for digging holes, such post holes or shrubbery planting holes, or lifting loads is arranged with a compact chassis having a steerable power driven rear wheel, a pair of laterally adjustable front wheels projecting ahead of the forward end of the chassis, and a vertical guide at the forward end of the chassis along which a hydraulic auger drive motor is reciprocally movable. A motor driving a variable displacement hydraulic pump selectively supplies power to the hydraulic auger motor, the rear drive wheel motor, and a hydraulic cylinder that reciprocates the auger drive.
Inventors
- 👤 R Kuhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:46
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B19/00; E21B19/08; E21B19/084
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
218 words
A landscaper digger-loader machine, comprising in combination, a generally rectangular chassis, a pair of forwardly extending tubular arms of non-circular cross section, means adjustably mounting said arms to said chassis for lateral adjustment of said arms relative to said chassis, a wheel support slidably received in each arm, a ground engaging wheel mounted on an axle extending transversely of each slidable wheel support, said supports being engageable in said arms in direct and inverted position to Vary the spacing of said wheels with respect to said chassis, a vertically extending shaft journalled in said chassis near the end remote from said tubular arms, a ground engaging drive wheel and hydraulic wheel drive means mounted on said vertically extending shaft, steering mechanism for rotating said vertical shaft relative to said chassis, a guide mounted on and extending upward from said chassis between said forwardly extending arms, a carriage movably mounted on the guide, a hydraulic cylinder and drive means mounted on the chassis and guide for moving the carriage, means on the carriage to selectively receive a hydraulic auger drive motor or load support means, a drive motor and variable displacement hydraulic pump mounted on the chassis and means selectively connecting the hydraulic pump to said hydraulic wheel drive means, said hydraulic cylinder, and said auger hydraulic drive motor.
Claim 2
Dependent Claim
218 words
A landscaper digger-loader machine, comprising in combination, a generally rectangular chassis, a pair of forwardly extending tubular arms of non-circular cross section, means adjustably mounting said arms to said chassis for lateral adjustment of said arms relative to said chassis, a wheel support slidably received in each arm, a ground engaging wheel mounted on an axle extending transversely of each slidable wheel support, said supports being engageable in said arms in direct and inverted position to Vary the spacing of said wheels with respect to said chassis, a vertically extending shaft journalled in said chassis near the end remote from said tubular arms, a ground engaging drive wheel and hydraulic wheel drive means mounted on said vertically extending shaft, steering mechanism for rotating said vertical shaft relative to said chassis, a guide mounted on and extending upward from said chassis between said forwardly extending arms, a carriage movably mounted on the guide, a hydraulic cylinder and drive means mounted on the chassis and guide for moving the carriage, means on the carriage to selectively receive a hydraulic auger drive motor or load support means, a drive motor and variable displacement hydraulic pump mounted on the chassis and means selectively connecting the hydraulic pump to said hydraulic wheel drive means, said hydraulic cylinder, and said auger hydraulic drive motor.
Claim 3
Dependent Claim
45 words
In a digger-loader machine according to claim 1 a demountable trailer hitch tongue extending from an end of the chassis remote from the tubular arms, whereby said digger-loader machine may be towed by a vehicle with said drive wheel out of engagement with the ground.
Claim 4
Dependent Claim
27 words
In a digger loader machine according to claim 1, means for vertically adjusting said arms mounting means whereby said machine may be leveled on uneven job sites.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |