US3986562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turf perforating device
Assignee: Individual
•
Filing: 1975-07-10
•
Granted: 1976-10-19
•
Expires: 1995-07-10
Abstract
Abstract A turf perforating device for aerating lawns by removing plugs therefrom comprising a wheeled frame having a plurality of reciprocating tools connected by a linkage to a crankshaft and each linkage slidably mounted in a pivotable sleeve which prevents binding of the linkage as the frame is moved across the lawn and the tool is disposed in the ground.
Inventors
- 👤 Marvin L. Killion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:18
CPC Classifications
A; A01; A01B; A01B45/00; A01B45/02; A01B45/023; Y; Y10; Y10S; Y10S111/00; Y10S111/901
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
91 words
A turf perforating device comprising: a wheeled frame; a laterally disposed crankshaft rotatably mounted on said frame; power means mounted on said frame and operably connected to said crankshaft; a plurality of laterally spaced guide means pivotally connected to said frame below said crankshaft; reciprocating means slidably mounted in each said guide means and having one end connected to said crankshaft and having another end depending therefrom; a tool connected to the depending end of each said reciprocating means and depending therefrom; said power means operable to reciprocate said reciprocating means.
Claim 2
Dependent Claim
91 words
A turf perforating device comprising: a wheeled frame; a laterally disposed crankshaft rotatably mounted on said frame; power means mounted on said frame and operably connected to said crankshaft; a plurality of laterally spaced guide means pivotally connected to said frame below said crankshaft; reciprocating means slidably mounted in each said guide means and having one end connected to said crankshaft and having another end depending therefrom; a tool connected to the depending end of each said reciprocating means and depending therefrom; said power means operable to reciprocate said reciprocating means.
Claim 3
Dependent Claim
59 words
A turf perforating device as defined in claim 1 including a spring biasing means connected between said frame and each said guide means for biasing said guide means in a first position, said guide means pivotal from said first position to a second position disposed rearwardly of said first position in response to a rearward movement of said tool.
Claim 4
Dependent Claim
26 words
A turf perforating device as defined in claim 2 wherein each said guide means has at least one longitudinally disposed reciprocating means receiving slot formed therein.
Claim 5
Dependent Claim
20 words
A turf perforating device as defined in claim 1 wherein said reciprocating means project from only 180° of said crankshaft.
Claim 6
Dependent Claim
59 words
A turf perforating device as defined in claim 4 including a spring biasing means connected between said frame and each said guide means for biasing said guide means in a first position, said guide means pivotal from said first position to a second position disposed rearwardly of said first position in response to a rearward movement of said tool.
Claim 7
Dependent Claim
26 words
A turf perforating device as defined in claim 5 wherein each said guide means has at least one longitudinally disposed reciprocating means receiving slot formed therein.
Claim 8
Dependent Claim
96 words
A turf perforating device as defined in claim 6 wherein each said reciprocating means includes a crank arm having one end secured to said crankshaft, a bearing rotatably secured on one end to the other end of said crank arm, a connecting rod secured on one end to said bearing, and a piston slidably disposed in said guide means and secured on one end to said rod other end and having a free end depending therefrom, and a perforating tool having one end secured to said piston free end and having the other end depending therefrom.
Claim 9
Dependent Claim
19 words
A turf perforating device as defined in claim 7 wherein each said spring biasing means is a compression spring.
Claim 10
Dependent Claim
60 words
A turf perforating device as defined in claim 8 wherein each said guide means includes a generally vertically disposed, hollow open ended, cylindrical sleeve having a longitudinally disposed front slot and a longitudinally disposed rear slot formed in the upper end thereof, and a hinge unit secured to said sleeve upper end proximate said front slot and to said frame.
Claim 11
Dependent Claim
68 words
A turf perforating device as defined in claim 9 wherein said power means includes a motor mounted on said frame and having a sheave mounted on its shaft, a sheave mounted on one end of said crankshaft, an endless belt mounted over said sheaves and a clutch device connected to said frame and operably connected to said belt for tightening and loosening said belt relative to said sheaves.
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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) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |