Patent US4021996A successfully refreshed from Google Patents.
US4021996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf greens mower
Assignee: Individual
•
Filing: 1976-02-26
•
Granted: 1977-05-10
•
Expires: 1996-02-26
Abstract
Abstract A precision grass mower of the triplex reel type operating from a common tractor-type power source, each mower unit having an adjustable ground engaging roller for cutting golf greens at a precisely predetermined height. Each of the reels of the mower is provided with manually actuated, automatically operated shifting means for moving the height adjusting roller to either of two positions for cutting the grass of the green and of the collar surrounding the green at different but precisely determined heights. The shifting means of all of the mower reels are instantly and simultaneously actuated and operated by fluid pressure.
Inventors
- 👤 Gordon E. Bartlett
- 👤 Michael D. Roach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:20
CPC Classifications
A; A01; A01D; A01D75/00; A01D75/30; A01D75/306
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
204 words
In a power driven tractor type riding golf greens mower having a plurality of reel mowing units, each mowing unit having a frame including a pair of parallel spaced apart longitudinally extending end members and supporting a transversely extending, rotatable grass cutting reel and bed plate and a pair of parallel rotary ground engaging means disposed forwardly and rearwardly of the reel, the improvement which consists of a cutting height adjustment on each mowing unit comprising: A. a pair of spaced apart mounting brackets for one of said rotary ground engaging means fixedly secured to said frame end members, B. a pair of spaced apart support assemblies for the other of said rotary ground engaging means secured to said frame end members for reciprocable vertical movement relative to the frame, C. a pair of fluid pressure cylinders fixedly secured to said frame above said reciprocable support assemblies, the pistons thereof secured to said support assemblies, D. a pair of stop means for limiting reciprocable movement of each of said reciprocable support assemblies, E. a common source of fluid pressure, F. conduit means connecting said source of fluid pressure to each of said cylinders, and G. control means regulating flow of fluid through said conduits.
Claim 2
Dependent Claim
204 words
In a power driven tractor type riding golf greens mower having a plurality of reel mowing units, each mowing unit having a frame including a pair of parallel spaced apart longitudinally extending end members and supporting a transversely extending, rotatable grass cutting reel and bed plate and a pair of parallel rotary ground engaging means disposed forwardly and rearwardly of the reel, the improvement which consists of a cutting height adjustment on each mowing unit comprising: A. a pair of spaced apart mounting brackets for one of said rotary ground engaging means fixedly secured to said frame end members, B. a pair of spaced apart support assemblies for the other of said rotary ground engaging means secured to said frame end members for reciprocable vertical movement relative to the frame, C. a pair of fluid pressure cylinders fixedly secured to said frame above said reciprocable support assemblies, the pistons thereof secured to said support assemblies, D. a pair of stop means for limiting reciprocable movement of each of said reciprocable support assemblies, E. a common source of fluid pressure, F. conduit means connecting said source of fluid pressure to each of said cylinders, and G. control means regulating flow of fluid through said conduits.
Claim 3
Dependent Claim
57 words
A mower according to claim 1 further characterized in that: A. said source of fluid pressure comprises an electrically operated air compressor and tank, and B. said conduit means includes a first distributor fitting, a separate conduit to each mowing unit, a further distributor fitting mounted on each mowing unit and a separate conduit to each cylinder.
Claim 4
Dependent Claim
23 words
A mower according to claim 2 further characterized in that said control means comprises a swtich controlling the electrical circuit to said compressor.
Claim 5
Dependent Claim
42 words
A mower according to claim 1 further characterized in that: A. each of said reciprocable support assemblies includes a vertically extending shank, and B. the upper end of said shank is rigidly secured to the piston rod of one of said cylinders.
Claim 6
Dependent Claim
20 words
A mower according to claim 4 further characterized in that said shank is in axial alignment with said piston rod.
Claim 7
Dependent Claim
56 words
A mower according to claim 4 further characterized in that: A. said frame end members each include a generally vertical passage adjacent one end thereof, B. said support assemblies shank extends through said passage for reciprocal movement therein, and C. said stop means are mounted on said shank above and below the ends of said passage.
Claim 8
Dependent Claim
58 words
A mower according to claim 6 further characterized in that: A. said shank is threaded through at least part of its length, B. one of said stop means is a nut on the threaded portion of said shank, and C. the other of said stop means is a sleeve coupling the ends of the shank and piston rod.
Claim 9
Dependent Claim
26 words
A mower according to claim 1 further characterized in that the ground engaging means supported in said reciprocable support assemblies is disposed rearwardly of the reel.
References Cited (Backward Citations)
US3524309A
Cited
US3824772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |