Damping force control type hydraulic shock absorber

Details Damping force control type hydraulic shock absorber Damping force control type hydraulic shock absorber

1993-10-12

1994-05-31

Butler, Douglas C.

Brakes

Internal-resistance motion retarder

Controlled by an operator remote from retarder

1376253, 18832215, 188319, F16F 944

Patent

active

053161149

ABSTRACT:
A damping force control type hydraulic shock absorber capable of providing different damping force characteristics during the extension and retraction strokes when the piston speed is low. The hydraulic shock absorber has a piston having a first damping force generating mechanism. A bypass passage is formed in part by small orifice passages and an extension-side damping force generating mechanism. The bypass passage is further provided with large orifice passages (constituting a passage with relatively large cross-sectional area) and medium orifice passages (with a medium cross-sectional area). When all the orifice passages are closed with a shutter, "hard" characteristics are obtained by the first damping force generating mechanism. When the shutter is opened, "medium" characteristics are obtained by the cooperation of the extension-side damping force generating mechanism and the medium orifice passages, which come into effect during the retraction stroke. When the large and small orifice passages are opened, "soft" characteristics are obtained by the cooperation of the small orifice passages, which come into effect during the extension stroke and the large orifice passages, which come into effect during the contraction stroke.

REFERENCES:
patent: 4754855 (1988-07-01), Kuwana et al.
patent: 4765446 (1988-08-01), Murata et al.
patent: 4800994 (1989-01-01), Imaizumi et al.
patent: 4997068 (1991-03-01), Ashiba
patent: 5248014 (1993-09-01), Ashiba

Affiliated with

Also associated with

Rating

Damping force control type hydraulic shock absorber does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Damping force control type hydraulic shock absorber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Damping force control type hydraulic shock absorber will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1622286