Motor vehicles – Steering gear – No mechanical connection between steering shaft and steering...
Reexamination Certificate
2005-08-02
2005-08-02
Hurley, Kevin (Department: 3611)
Motor vehicles
Steering gear
No mechanical connection between steering shaft and steering...
Reexamination Certificate
active
06923290
ABSTRACT:
A closed-circuit pump is provided that receives input from a steering unit in order to drive a steering cylinder. The closed-circuit pump is preferably a proportional bi-directional pump. The steering unit includes a steering wheel or similar device controlled by an operator. In one embodiment, the steering unit is a conventional hydraulic system that includes a servo pump. In another embodiment, the steering unit is an electronic displacement control system. The steering cylinder engages with a steering assembly to perform the steering function by physically turning the wheels of the vehicle. The inlet of the steering cylinder includes a counterbalance valve, which prevents flow into the steering cylinder when there is no steering input from the operator.
REFERENCES:
patent: 3011579 (1961-12-01), Milliken, Jr.
patent: 3016708 (1962-01-01), Gordon et al.
patent: 4020867 (1977-05-01), Sumiyoshi
patent: 4409789 (1983-10-01), Hansen et al.
patent: 4578948 (1986-04-01), Hutson et al.
patent: 4628690 (1986-12-01), Arai et al.
patent: 4640094 (1987-02-01), Wittren
patent: 4865144 (1989-09-01), North
patent: 4914592 (1990-04-01), Callahan et al.
patent: 5267627 (1993-12-01), Frank et al.
patent: 5273129 (1993-12-01), Wright et al.
patent: 5893427 (1999-04-01), Bohner et al.
patent: 6047788 (2000-04-01), Bohner et al.
patent: 6068013 (2000-05-01), Arai et al.
patent: 6102150 (2000-08-01), Bohner et al.
patent: 6220385 (2001-04-01), Bohner et al.
patent: 6298940 (2001-10-01), Bohner et al.
patent: 6354393 (2002-03-01), Ahlert et al.
patent: 6560961 (2003-05-01), Draper et al.
MacLeod Ian J. C.
Sporrer Rick J.
Hurley Kevin
Sauer-Danfoss Inc.
LandOfFree
Closed circuit steering circuit for mobile vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Closed circuit steering circuit for mobile vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Closed circuit steering circuit for mobile vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3477355