Motor vehicles – With means for promoting safety of vehicle – its occupant or... – Responsive to absence or inattention of operator – or...
Patent
1988-07-29
1990-11-13
Bertsch, Richard A.
Motor vehicles
With means for promoting safety of vehicle, its occupant or...
Responsive to absence or inattention of operator, or...
74496, 180 684, 180 692, 180337, 180 531, 280 96, 280771, B60K 2804, B62D 118, B62D 300, B62D 2510
Patent
active
049695339
ABSTRACT:
A tractor includes: (a) a one piece frame having opposite ends defined by respective members adapted for receiving ballast with the rear member including a hitch located below any mounted ballast, (b) a dual screen filtering arrangement located upstream of a radiator and an engine combustion air inlet, (c) an implement lift system including a main spring lift assist which is locked out when the implement is lowered and an auxiliary lift assist for increasing the lift assist for front-mounted implements but is mounted so as to join the main lifts assist to produce a near constant lift force during lifting the implement while producing a minimal lift force when the implement is completely lowered (d) short and long effective lengths of a steering pitman arm may be selected, for respectively minimizing steering effort or maximizing responsiveness, by respectively connecting a mounting point closest to or a mounting point farthest from a pivot axis of the arm to a drag link, (e) a steering wheel is tiltable together with a steering column about a u-joint of the latter to a selected position by operation of a cam-operated latch, (f) a hydrostatic transmission is accurately neutralized by speed and direction and brake controls including adjustable arms, rollers and cams, (g) a tractor hydrostatic transmission includes a manually-operable bypass valve which is shiftable to dump the pressure side of the pump for permitting the tractor to be pushed when the engine is not working, the valve being automatically moved to a normal position permitting normal operation of the pump in response to the pump being driven by the engine, and (h) a switch is mounted to a seat structure so as to open, in response to an operator leaving the tractor seat, the mounting of the switch to the seat being such that a load as small as 20 kg applied at any place on the seat will keep the switch closed.
REFERENCES:
patent: 2417072 (1947-03-01), Graham
patent: 2417073 (1947-03-01), Booth
patent: 3360933 (1968-01-01), Swanson et al.
patent: 3376703 (1968-04-01), Breznski
patent: 3431792 (1969-03-01), Smith
patent: 3628396 (1971-12-01), Grobowski
patent: 3700257 (1972-10-01), Hurlburt
patent: 3985039 (1976-10-01), Federspiel
patent: 4051915 (1977-10-01), Behrens
patent: 4304141 (1981-12-01), Tone et al.
patent: 4317500 (1982-03-01), Bening
patent: 4385863 (1985-05-01), Minor et al.
patent: 4466504 (1984-08-01), Giandenoto et al.
patent: 4509614 (1985-04-01), Bando et al.
patent: 4579183 (1986-04-01), Irikura et al.
patent: 4580811 (1986-04-01), Wykhuis et al.
patent: 4607199 (1986-08-01), Krueger et al.
patent: 4640378 (1987-02-01), Dobberpuhl et al.
patent: 4651018 (1987-03-01), Peterson
patent: 4655313 (1987-04-01), Hicks
John Deere Service Manual, SM-3040, Dated Nov. 1969, Pertaining to Model 110 and 112 Garden Tractors and Being in the French Language--Page 15-1 Only.
John Deere Operator's Manual, OM-M47885, Issue L3, Dated 1983, Pertaining to Model 31 Integral Rotary Tiller for Model 110 and 112 Lawn & Garden Tractors--Cover Page Plus pp. 17, 18 and 20.
John Deere Operator's Manual, OM-M89616, Dated 1985, Issue F5, Pertaining to the Model 37A Snow Thrower for Model 110 and 12 and Other Lawn and Garden Tractors--Cover Page Plus pp. 5, 9 and 13.
Gilson Brother's Company Advertising Brochure Pertaining to Compact Tractors, Dated 9/1977, Selected Portions Only.
Kubota Tractor Company, Advertising Brochure Pertaining to Kubota Diesel Lawn & Garden Tractors, Dated Jul. 1985, Selected Portions Only.
Baker Ronald J.
Behrens Robert N.
Del Ponte Denis J.
Holm David R.
Hopp Mark F.
Bertsch Richard A.
Deere & Company
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