Patent US3739857A successfully refreshed from Google Patents.
US3739857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turf plug remover
Assignee: Individual
•
Filing: 1970-09-24
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Granted: 1973-06-19
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Expires: 1990-09-24
Abstract
Abstract A cylindrical member with radially projecting, tubular plug cutters disposed in opposite pairs and containing pistons interconnected by a rigid rod. As the member rolls over the ground, each cutter is sequentially moved into and out of a ground penetrating position. Movement of a plug upwardly in a cutter relative to the cutter shifts both pistons of the pair upwardly ejecting a previously removed plug from the opposite cutter. An alternate embodiment without pistons utilizes the force of each succeeding plug severed by a cutter upon penetration of the latter to directly engage a preceding plug ejecting it from the cutter. A conical baffle deflects the ejected plugs from the member.
Inventors
- 👤 J Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:22
CPC Classifications
A; A01; A01B; A01B45/00; A01B45/02; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/21; Y10T83/2105; Y10T83/2107; Y10T83/2109
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
221 words
Apparatus for removing plugs from turf comprising: a pair of open-ended tubular plug cutters, each for penetration of its open end into the soil to sever and remove a plug therefrom; a piston slidably received in each cutter respectively, each piston being disposed for engagement by the soil as the corresponding cutter penetrates the soil whereby penetration of the cutter downwardly into the soil forces the corresponding piston upwardly relative to its cutter; rotatable means mounting the cutters in spaced relationship for sequential penetration and removal from the soil, whereby one of the cutters of said pair is in a position removed from the soil with its open end extending upwardly while the other cutter is in position to penetrate the soil; an elongated rigid rod secured to each piston respectively for movement with said pistons to effect removal of a plug contained in one of the cutters out of the open end of the latter after the plug is removed from the soil and said one cutter is in said position removed from the soil, by moving the piston in said one cutter upwardly in response to movement of the piston in the other cutter upwardly as the latter penetrates into the soil and means carried by the rod for limiting movement of the rod with respect to the cutters.
Claim 2
Dependent Claim
221 words
Apparatus for removing plugs from turf comprising: a pair of open-ended tubular plug cutters, each for penetration of its open end into the soil to sever and remove a plug therefrom; a piston slidably received in each cutter respectively, each piston being disposed for engagement by the soil as the corresponding cutter penetrates the soil whereby penetration of the cutter downwardly into the soil forces the corresponding piston upwardly relative to its cutter; rotatable means mounting the cutters in spaced relationship for sequential penetration and removal from the soil, whereby one of the cutters of said pair is in a position removed from the soil with its open end extending upwardly while the other cutter is in position to penetrate the soil; an elongated rigid rod secured to each piston respectively for movement with said pistons to effect removal of a plug contained in one of the cutters out of the open end of the latter after the plug is removed from the soil and said one cutter is in said position removed from the soil, by moving the piston in said one cutter upwardly in response to movement of the piston in the other cutter upwardly as the latter penetrates into the soil and means carried by the rod for limiting movement of the rod with respect to the cutters.
Claim 3
Dependent Claim
47 words
The invention of claim 1, wherein movement limiting means includes a pair of abutments carried by the rod, each abutment being disposed for engagement against a corresponding cutter to limit the movement of the rod after the same has moved a predetermined distance toward said corresponding cutter.
Claim 4
Dependent Claim
111 words
The invention of claim 1, wherein said cutter mounting means includes an annular member adapted for rolling movement over the turf, said cutters being carried by the member for successive penetration into the turf as the member rolls thereover, and a shaft carried by the member and extending axially thereof, said shaft having a transverse opening disposed to slidably receive the rod through the opening, and wherein said limiting means includes a pair of spaced apart abutments carried by the rod, there being an abutment on each side of the shaft, the abutments being disposed to engage the shaft upon a predetermined amount of movement of the rod in either direction.
Claim 5
Dependent Claim
60 words
The invention of claim 1, wherein said rotatable mounting means includes a cylinder, an axle secured in the cylinder, a frame operably coupled to the axle for rotation of the cylinder as the frame is moved along the turf, and means carried by the frame for supporting an auxiliary weight for assisting the penetration of said cutters into the turf.
Claim 6
Dependent Claim
29 words
The invention of claim 4, wherein is included a carrier mounted on the frame in disposition to receive the plugs as the latter are ejected from the respective cutters.
Claim 7
Dependent Claim
39 words
The invention of claim 5, wherein said carrier includes a conveyor extending transversely of the path of travel of the apparatus, and means operably coupled with the conveyor for operating the latter to discharge the plugs from the carrier.
Claim 8
Dependent Claim
103 words
The invention of claim 5, wherein said carrier includes a wall mounted on the frame and disposed in proximity to the outer surface of said cylinder for receiving the plugs discharged from the cutters, said wall being provided with a notch in the path of travel of a cutter and adapted to passage of said cutter therethrough during rotation of the cylinder, and resilient flap means secured to the wall normally in disposition closing said notch to prevent inadvertent passage of plugs therethrough, said flap means being yieldable upon engagement of said cutter therewith to permit movement of the cutter through the notch.
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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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |