US4363374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor
Assignee: RICHTER MACHINERY (AUST) Pty Ltd
•
Filing: 1980-10-10
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Granted: 1982-12-14
•
Expires: 2000-10-10
Abstract
Abstract The tractor has a main frame, supported by a pair of steering/driving wheels, to which is fitted the engine and transmission. A pair of booms are pivotally mounted on the frame (or on a sub-frame pivotally connected to the frame) and are provided with castor wheels. The track between the castor wheels is selectively adjustable by hydraulic rams connected to the booms and the frame (or sub-frame). Agricultural implements may be connected to the frame, to the booms inside the wheelbase of the tractor or to a draw-bar interconnecting the booms.
Inventors
- 👤 Howard J. Richter
- 👤 Graham J. Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:37
CPC Classifications
B; B62; B62D; B62D49/00; B62D49/06; B62D49/0607; B62D49/0678; Y; Y10; Y10S; Y10S180/00; Y10S180/90
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
92 words
A tractor including: (a) a frame; (b) an engine mounted on said frame; (c) at least one drive wheel supporting said frame; (d) transmission means operatively connecting said engine and said drive wheel; (e) at least one boom pivotally connected to said frame and extending in a direction away from said frame; (f) means for pivotally moving said boom toward or away from the longitudinal axis of said frame; (g) means on said boom to permit a farming implement to be secured thereto; and (h) a ground engaging wheel supporting said boom.
Claim 2
Dependent Claim
92 words
A tractor including: (a) a frame; (b) an engine mounted on said frame; (c) at least one drive wheel supporting said frame; (d) transmission means operatively connecting said engine and said drive wheel; (e) at least one boom pivotally connected to said frame and extending in a direction away from said frame; (f) means for pivotally moving said boom toward or away from the longitudinal axis of said frame; (g) means on said boom to permit a farming implement to be secured thereto; and (h) a ground engaging wheel supporting said boom.
Claim 3
Dependent Claim
27 words
A tractor as claimed in claim 1 wherein said frame is substantially rectangular; and a pair of booms are pivotally connected to adjacent corners of the frame.
Claim 4
Dependent Claim
30 words
A tractor as claimed in claim 1 further including a sub-frame pivotally connected to said frame for relative angular movement; and a pair of booms pivotally connected to the subframe.
Claim 5
Dependent Claim
19 words
A tractor as claimed in claims 2 or 3 further including hydraulic ram means for pivotally moving said booms.
Claim 6
Dependent Claim
64 words
A tractor as claimed in claim 1 wherein said transmission means comprises: a hydraulic motor operatively connected to said drive wheel; a hydraulic pump driven by the engine; means to connect said hydraulic motor and said hydraulic pump; and control means to control the flow of hydraulic fluid from said hydraulic pump to said hydraulic motor to thereby control the drive to said motor.
Claim 7
Dependent Claim
47 words
A tractor as claimed in claim 1 further including: an axle housing mounted on each side of said frame; a stub axle slidably mounted in each axle housing and movable to vary the track of the tractor, each stub axle having a drive wheel rotatably mounted thereon.
Claim 8
Dependent Claim
48 words
A tractor as claimed in claim 6 and further including an axle arm pivotally mounted on each side of said frame, each of said axle housings being mounted on a respective axle arm, pivotal movement of said axle arms raising and lowering said frame relative to the ground.
Claim 9
Dependent Claim
17 words
A tractor as claimed in claim 1 in which said ground engaging wheel is a castor wheel.
Claim 10
Dependent Claim
17 words
A tractor as claimed in claim 1 in which said ground engaging wheel is driven and steerable.
References Cited (Backward Citations)
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US2796140A
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |