US3817337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for making holes in putting greens
Assignee: Individual
•
Filing: 1972-09-08
•
Granted: 1974-06-18
•
Expires: 1992-09-08
Abstract
Abstract A machine for making holes in putting greens positions a vertically movable rotatable cutting cylinder for manual and hydraulic operation. Controls for hydraulic fluid supplied the device act to move the cutting cylinder downwardly until the action is resisted whereupon the cutting cylinder is revolved. Stripping means mounted in the cutting cylinder eject a plug of turf and dirt therefrom when the cutting cylinder is elevated.
Inventors
- 👤 P Panak
- 👤 E Bronson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:31
CPC Classifications
A; A01; A01B; A01B45/00; A01G; A01G23/00; A01G23/02; A01G23/04; A01G23/046; E; E21; E21B; E21B7/00; E21B7/003
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
180 words
A machine for making holes in putting greens including a supporting frame, a thrust arm, means pivotally connecting said thrust arm to said supporting frame and a hydraulic piston and cylinder assembly positioned therebelow, means pivotally connecting said hydraulic piston and cylinder assembly to said thrust arm, a rotary hydraulic motor including a drive shaft carried by said piston and a cutting cylinder secured to said drive shaft, a source of fluid pressure and means connecting said hydraulic piston and cylinder and rotary hydraulic motor to said source, a first valve means controlling said fluid pressure with respect to said hydraulic piston and cylinder whereby said cutting cylinder may be moved vertically thereby and a second valve means that is pressure responsive in opening in communication with said means connecting said source of fluid pressure with said hydraulic piston and cylinder and in communication with said rotary hydraulic motor and responsive in operation to an increase in fluid pressure in said connecting means whereby said cutting cylinder may be rotated thereby upon an increase in pressure in said connecting means.
Claim 2
Dependent Claim
180 words
A machine for making holes in putting greens including a supporting frame, a thrust arm, means pivotally connecting said thrust arm to said supporting frame and a hydraulic piston and cylinder assembly positioned therebelow, means pivotally connecting said hydraulic piston and cylinder assembly to said thrust arm, a rotary hydraulic motor including a drive shaft carried by said piston and a cutting cylinder secured to said drive shaft, a source of fluid pressure and means connecting said hydraulic piston and cylinder and rotary hydraulic motor to said source, a first valve means controlling said fluid pressure with respect to said hydraulic piston and cylinder whereby said cutting cylinder may be moved vertically thereby and a second valve means that is pressure responsive in opening in communication with said means connecting said source of fluid pressure with said hydraulic piston and cylinder and in communication with said rotary hydraulic motor and responsive in operation to an increase in fluid pressure in said connecting means whereby said cutting cylinder may be rotated thereby upon an increase in pressure in said connecting means.
Claim 3
Dependent Claim
51 words
The machine for making holes in putting greens sEt forth in claim 1 and wherein the pressure responsive valve controls the fluid pressure delivered to said rotary hydraulic motor and is arranged to open communication upon an increase of pressure relative to that necessary to move said hydraulic piston and cylinder.
Claim 4
Dependent Claim
73 words
The machine for making holes in putting greens set forth in claim 1 and wherein said support means includes a vertical member having a sideward extension at its upper and and the thrust arm is pivoted to the outer end of the sideward extension and latch means are provided for securing said thrust arm in releasable engagement with said sideward extension so as to hold said thrust arm in a predetermined fixed position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |