Patent US3742685A successfully refreshed from Google Patents.
US3742685A
Expired / Lapsed
US
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Lawn mower with hydrostatic drive
Assignee: Stellar Industries Inc
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Filing: 1971-12-29
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Granted: 1973-07-03
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Expires: 1991-12-29
Abstract
Abstract A gang lawn mower includes a plurality of reel-type lawn mowers attached to a tractor and a prime mover is mounted in the tractor. One hydrostatic transmission drivingly connects the output of the prime mover to the ground wheels of the tractor to drive the tractor and a second hydrostatic transmission drivingly connects the output of the prime mover to the lawn mower reels. The lawn mower reels are thus driven independently of the speed of the tractor.
Inventors
- 👤 J Lian
- 👤 S Pennila
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:46
CPC Classifications
A; A01; A01D; A01D75/00; A01D75/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
96 words
In a lawn mower, the combination of a tractor, lawn mower means attached to the tractor, a prime mover on the tractor, the tractor having ground wheels; a first hydrostatic transmission drivingly connecting said prime mover to drive the ground wheels, a second hydrostatic transmission drivingly connecting said prime mover and the lawn mower means, means for controlling individually the output speed of each hydrostatic transmission, and means connecting said transmissions to said prime mover, the driving speed of the lawn mower means being independent of the speed at which the tractor ground wheels are driven.
Claim 2
Dependent Claim
96 words
In a lawn mower, the combination of a tractor, lawn mower means attached to the tractor, a prime mover on the tractor, the tractor having ground wheels; a first hydrostatic transmission drivingly connecting said prime mover to drive the ground wheels, a second hydrostatic transmission drivingly connecting said prime mover and the lawn mower means, means for controlling individually the output speed of each hydrostatic transmission, and means connecting said transmissions to said prime mover, the driving speed of the lawn mower means being independent of the speed at which the tractor ground wheels are driven.
Claim 3
Dependent Claim
23 words
In a lawn mower as claimed in claim 1 wherein said lawn mower means consists of a plurality of reel lawn mower units.
Claim 4
Dependent Claim
39 words
In a lawn mower as claimed in claim 2 wherein the transmission driving reels of the lawn mowers can be reversed so that reels can be rotated in reverse direction to power lap the cutting edges of the reels.
Claim 5
Dependent Claim
32 words
In a lawn mower as claimed in claim 1 wherein said prime mover has an output shaft and both hydrostatic transmissions have their inputs drivingly connected to said prime mover output shaft.
Claim 6
Dependent Claim
48 words
In a lawn mower as claimed in claim 1 wherein said lawn mower means include a pair of side mowers on opposite sides of the tractor and mounted on a common shaft, and means for drivingly connecting said common shaft to the output of said second hydrostatic transmission.
Claim 7
Dependent Claim
42 words
In a lawn mower as claimed in claim 5 wherein said lawn mower means comprise a front mower in front of the tractor with a driven shaft and means drivingly connecting said front mower driven shaft and said side mowers common shaft.
Claim 8
Dependent Claim
22 words
In a lawn mower as claimed in claim 6 wherein said drive means comprises a drive chain and sprockets on said shafts.
Claim 9
Dependent Claim
32 words
In a lawn mower as claimed in claim 1 and comprising a drive chain drivingly connecting the inputs of said first and second hydrostatic transmissions to the output of said prime mover.
References Cited (Backward Citations)
US3563012A
Cited
US3579965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |