Crawler tractor

Details Crawler tractor Crawler tractor

2008-07-01

2008-07-01

Winner, Tony H. (Department: 3611)

Motor vehicles

Steering by driving

Combined with manual steering

C180S006320, C180S006440

Reexamination Certificate

active

07392867

ABSTRACT:
A crawler tractor comprises steering mechanisms (44) (45) for rotating a machine body by causing right and left crawler belts (9) to move differentially. The tractor is characterized in that the steering mechanism (44) is connected to a drive system located behind a reverser mechanism (21) that moves the machine body forward and back. Even when the machine body movement direction is changed from forward to back, the direction of the steering wheel (18) and the direction of the rotation of the machine body are kept the same, so that a reversed steering phenomenon is prevented from occurring, and an appropriate operation in forward or back movement is enabled with a simple structure that does not require an additional mechanism such as a reverse-steering preventions mechanism.

REFERENCES:
patent: 3966005 (1976-06-01), Binger
patent: 4215755 (1980-08-01), Waterworth et al.
patent: 5477455 (1995-12-01), Ishino et al.
patent: 5535840 (1996-07-01), Ishino et al.
patent: 5611405 (1997-03-01), Ishino et al.
patent: RE36151 (1999-03-01), Ishino et al.
patent: 6126564 (2000-10-01), Irikura et al.
patent: 61-244672 (1986-10-01), None
patent: 2001-55161 (2001-02-01), None
patent: 2001-253362 (2001-09-01), None

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