US4084642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turf perforating machine
Assignee: Individual
•
Filing: 1976-07-13
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Granted: 1978-04-18
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Expires: 1996-07-13
Abstract
Abstract A turf perforating machine for aerating lawns by removing plugs therefrom comprising a wheeled frame having a plurality of reciprocating tools, each connected by a linkage to an eccentric mounted on a journal and each linkage slidably mounted in a pivotable guide secured to the journal which prevents binding of the linkage as the frame is moved across the lawn and the tool is disposed in the ground, and including further a retractor unit for pivoting the guide, linkage and tools to a nonperforating position.
Inventors
- 👤 Marvin L. Killion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:10
CPC Classifications
A; A01; A01B; A01B45/00; A01B45/02; A01B45/023
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
87 words
A turf perforating machine comprising: a wheeled frame; a laterally disposed shaft rotatably mounted on said frame; power means mounted on said frame and operably connected to said shaft; a guide device pivotally connected to said shaft and depending therefrom; an eccentric unit secured to said shaft; a reciprocating unit slidably disposed in said guide device and having one end connected to said eccentric unit and having the other end depending from said guide unit; and a tool unit secured to and depending from said reciprocating unit.
Claim 2
Dependent Claim
87 words
A turf perforating machine comprising: a wheeled frame; a laterally disposed shaft rotatably mounted on said frame; power means mounted on said frame and operably connected to said shaft; a guide device pivotally connected to said shaft and depending therefrom; an eccentric unit secured to said shaft; a reciprocating unit slidably disposed in said guide device and having one end connected to said eccentric unit and having the other end depending from said guide unit; and a tool unit secured to and depending from said reciprocating unit.
Claim 3
Dependent Claim
90 words
A turf perforating machine as defined in claim 1 and said guide device including a pair of bearings disposed on said shaft with one of said bearings mounted on each side of said eccentric unit, a pair of elongated spaced bars with each secured on one end to said bearing and having the other end generally depending therefrom and an open ended guide secured between the other ends of said bars with said open ends disposed one over the other; said reciprocating unit disposed between said bars and said guide.
Claim 4
Dependent Claim
33 words
A turf perforating machine as defined in claim 1 and including a manually operated retractor unit interconnected between said frame and said guide device for pivoting said guide device to a nonoperating position.
Claim 5
Dependent Claim
32 words
A turf perforating machine as defined in claim 3 and including a spring interconnected between said guide device and said retractor unit for biasing said guide guide device to an operating position.
Claim 6
Dependent Claim
121 words
A turf perforating machine as defined in claim 4 and said retractor unit including an elongated hanger pivotally secured on one end to said shaft, a transversely, horizontally disposed bar secured to the other end of said hanger, an arm having one end pivotally secured to said guide device and having another end movably secured to said bar, said spring disposed between said guide device and said bar on said arm, a lever secured on one end to said bar and operably connected on the other end to said frame wherein said lever is movable from an operating position wherein said guide device is in said operating position to a transport position wherein said guide device is in said nonoperating position.
Claim 7
Dependent Claim
91 words
A turf perforating machine as defined in claim 5 and said guide device including a pair of bearings disposed on said shaft with one of said bearings mounted on each side of said eccentric unit, a pair of elongated spaced bars with each secured on one end to a bearing and having the other end generally depending therefrom, and an open ended guide secured between the other ends of said bars with said open ends disposed one over the other said reciprocating unit disposed between said bars and in said guide.
Claim 8
Dependent Claim
37 words
A turf perforating machine as defined in claim 6 and said retractor device including a pair of depending, diverging flanges secured to said lever and coactable with said frame to position said lever relative to said frame.
Claim 9
Dependent Claim
47 words
A turf perforating machine as defined in claim 7 and said frame including an elongated angle iron secured transversely to said frame with said iron having a pair of upstanding legs against which said flanges seat when said lever is in an operating and a nonoperating position.
References Cited (Backward Citations)
US2056337A
Cited
US2236562A
Cited
US2255040A
Cited
US2638831A
Cited
US2800066A
Cited
FR1250983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |