Chassis with height adjustable wheels for regulating...

Land vehicles – Body elevation or tilt – Terrain slope compensation

Reexamination Certificate

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Details

C180S009520, C180S900000, C280S006155, C280S124111, C280S124112, C280S124116, C280S104000

Reexamination Certificate

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07131651

ABSTRACT:
A chassis is described which is constructed of two lower side frames which at each end are provided with a wheel or caterpillar track. On each of the two lower side members, there is a horizontal bearing. Each of these bearings are connected to an upper vertical side member which at their upper end is connected to two parallel cross members through horizontal bearings for the development of a parallelogram connection. Between the lower and upper side members, there are two double-acting hydraulic cylinders. These can be connected in parallel in order to make a weight distribution possible. By means of a regulation valve between pressure side and suction side, respectively, on the double-acting hydraulic cylinders the upper part of the chassis can swing back and forth in the longitudinal direction of the side members. Between the two cross members there is a double-acting hydraulic cylinder which can swing the upper part of the chassis back and forth in the side member's transverse direction by means of a regulation valve. Thus, it is possible to adjust a chassis member to a preferred orientation irrespective of the slope of the surface.

REFERENCES:
patent: 1686941 (1928-10-01), Taylor
patent: 2829901 (1958-04-01), Rush
patent: 2954833 (1960-10-01), Davidson
patent: 3309097 (1967-03-01), Seeber
patent: 3899037 (1975-08-01), Yuker
patent: 4186815 (1980-02-01), Hart
patent: 4679803 (1987-07-01), Biller et al.
patent: 5967529 (1999-10-01), Kopczynsk
patent: 6131919 (2000-10-01), Lee et al.
patent: 0501585 (1992-09-01), None
patent: 1114577 (2001-07-01), None
patent: 2719543 (1995-11-01), None
patent: 459571 (1989-07-01), None
patent: WO 91/14590 (1991-10-01), None

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