Motor vehicles – Bodies – Tractor and similar vehicle cabs
Patent
1986-11-28
1988-04-26
Weaver, Ross
Motor vehicles
Bodies
Tractor and similar vehicle cabs
180 8914, 296190, B62D 3306
Patent
active
047398531
ABSTRACT:
A cab for a medium-sized farm tractor includes a body portion that is pivotally attached to the chassis of the tractor for pivotal motion between a raised and lowered position. Preferably, the cab is a monocoque structure and is pivotally attached to the tractor at a forward end of the cab so that it pivots about its forward end. The cab and mounting brackets mounting the cab to the tractor are integrated to form a cantilever requiring no other support. The weight of the cab is used to keep the cab in the lowered position and the attachment between the cab and the chassis includes a counterbalance spring that relieves some of the weight of the cab to assist in raising the cab to its raised position. The cab includes a ventilation system that draws air from outside the cab into the interior of the cab. A filter is interposed in the path of the air as it enters the cab to filter out any toxic chemicals and particulate matter from the air. A deflector is installed within the cab in association withthe ventilation system to deflect the air entering the cab into the upper portion of the cab so that it flows around the head and shoulders of an operator within the cab. Preferably, a clear plastic dome is mounted on the top of the cab to provide a 360-degree range of vision for the operator. The air deflector cooperates with the dome to cause air from the ventilation system to flow into the dome. The air then follows the interior surface of the dome and surrounds the upper portion of the operator. A rotary windshield wiper is mounted on the exterior of the transparent dome and is operable to remove any foreign substance that may attach itself to the exterior of the dome.
REFERENCES:
patent: D186979 (1960-01-01), Stucky
patent: 2052471 (1936-08-01), Hula
patent: 2557339 (1951-06-01), Campbell
patent: 2583918 (1952-01-01), Wilson
patent: 2667379 (1954-01-01), Baze
patent: 2967073 (1961-01-01), Gagliardi
patent: 3206245 (1965-09-01), Westrum et al.
patent: 3451713 (1969-06-01), Hollingshead
patent: 3532377 (1970-10-01), Grasseler
patent: 3582132 (1971-06-01), Gunning
patent: 3752530 (1973-08-01), Voth
patent: 3776358 (1973-12-01), Williams
patent: 4097085 (1978-06-01), Nelson
patent: 4120527 (1978-10-01), Lawrence
patent: 4141429 (1979-02-01), Hale
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