Hydraulic steering arrangement

Details Hydraulic steering arrangement Hydraulic steering arrangement

2007-03-06

2009-12-15

Leslie, Michael (Department: 3745)

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

C060S384000

Reexamination Certificate

active

07631590

ABSTRACT:
The invention concerns a hydraulic steering arrangement (1) with a supply connection arrangement (P, T), a working connection arrangement (A, B) connectable to a steering motor (5), a steering unit (6) located between the supply connection arrangement (P, T) and the working connection arrangement (A, B), and a steering valve (14) whose outlet is connected to the working connection arrangement (A, B). It is endeavored to keep the load of such a steering arrangement small. For this purpose, the steering unit (6) is made as an open-center steering unit, an inlet (20) of the steering valve (14) being connected to a pressure supply arrangement (22) that can be activated by an activation of the steering valve (14).

REFERENCES:
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patent: 3996838 (1976-12-01), Goff
patent: 4215720 (1980-08-01), Becker
patent: 4311006 (1982-01-01), Becker
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patent: 5234070 (1993-08-01), Noah et al.
patent: 5511457 (1996-04-01), Hawkins et al.
patent: 6490861 (2002-12-01), Biggi et al.
patent: 1355955 (1974-06-01), None
Co-pending U.S. Appl. No. 11/714,510 entitled “Hydraulic Steering” filed Mar. 6, 2007.
Co-pending U.S. Appl. No. 11/714,364 entitled “Hydraulic Steering” filed Mar. 6, 2007.
Co-pending U.S. Appl. No. 11/714,419 entitled “Hydraulic Steering” filed Mar. 6, 2007.

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