Motor vehicles – Surface effect vehicles – Dynamic seal or fluid curtain
Patent
1994-02-28
1995-09-05
Hurley, Kevin T.
Motor vehicles
Surface effect vehicles
Dynamic seal or fluid curtain
180142, 91375A, 13762523, B62D 5083
Patent
active
054472091
ABSTRACT:
The hydraulic control valve 30 of a hydraulic actuator 20 for generating steering assist force comprises a first valve member 31 and a second valve member 32, both of which are rotatable relative to each other in response to steering resistance. Throttling portions are formed of spaces between axially extending edges defined by slots of the first valve member and axially extending edges defined by slots of the second valve member. The first hydraulic oil outlet slot 51b is located between a right turn slot 50a and a left turn slot 50b. The second hydraulic oil outlet slot 51c is located between communication slots 50c. Hydraulic oil feed slots 51a are located between a right turn slot 50a and a communication slot 50c and between a left turn slot 50b and a communication slot 50c. A closing angle of at least one type of second group throttling portions A', B', C' and D' is set larger than a closing angle of each of a first group throttling portions A, B, C and D. A variable throttle valve 60, capable of varying the flow area of its own throttling portion in response to driving conditions, is disposed between the second group throttling portions A', B', C' and D' and the tank 71.
REFERENCES:
patent: 4561521 (1985-12-01), Duffy
patent: 4570735 (1986-02-01), Duffy
patent: 4570736 (1986-02-01), Waldorf
patent: 4730687 (1988-03-01), Chikuma et al.
patent: 5253729 (1993-10-01), Suzuki
patent: 5259413 (1993-11-01), Harpole et al.
Sano Osamu
Sasaki Hiroto
Hurley Kevin T.
Koyo Seiko Co. Ltd.
LandOfFree
Hydraulic power steering device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic power steering device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic power steering device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-467438