Hydraulic steering device

Details Hydraulic steering device Hydraulic steering device

2006-12-08

2009-11-17

Hurley, Kevin (Department: 3611)

Motor vehicles

Steering gear

No mechanical connection between steering shaft and steering...

C180S422000

Reexamination Certificate

active

07617905

ABSTRACT:
A hydraulic steering device (1) of a mobile machine, in particular of an industrial truck, includes a steering angle transmitter (2) in mechanically functional communication with a steering valve (4). As a function of the actuation of the steering angle transmitter (2), the steering valve (4) controls the connection of a steering drive (13) with a pressure fluid source (6) and a reservoir (11). To vary the translation ratio of the steering device in a simple manner, a bypass device (20) is operationally associated with the steering drive (13). By activation of the bypass device, the quantity of pressure fluid delivered from the pressure fluid source (6) to the steering drive (13) can be diverted to a reservoir (11).

REFERENCES:
patent: 2671673 (1954-03-01), Benson
patent: 4254968 (1981-03-01), DelVecchio
patent: 4657276 (1987-04-01), Hamerl
patent: 5114170 (1992-05-01), Lanni et al.
patent: 5215158 (1993-06-01), Pedersen
patent: 5941551 (1999-08-01), Harman et al.
patent: 6179318 (2001-01-01), Howard
patent: 2003/0218313 (2003-11-01), Beaudoin

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