Brakes – Internal-resistance motion retarder – Position of thrust member relative to chamber
Patent
1979-10-05
1981-11-03
Butler, Douglas C.
Brakes
Internal-resistance motion retarder
Position of thrust member relative to chamber
267 8R, 188287, 188315, F16F 944
Patent
active
042981018
ABSTRACT:
A shock absorber for providing a decelerating force employs a piston disposed in a cylinder acting to displace the hydraulic fluid through a programmed series of orifices disposed along the length of the cylinder, with turbulent flow of the hydraulic fluid through the orifices. An adjustment in the shock absorber characteristics is achieved by a sleeve slidably fit over the cylinder, the cylinder having a series of ports with the sleeve being formed with a corresponding series of encircling straight-sided grooves which extend transversely with respect to the radial planes of the cylinder, such that each groove defines a variable area orifice depending on the rotative position of the sleeve over the cylinder by the overlying of the groove and cylinder ports. In a first version, the grooves are shaped as rings, tilted with respect to the cylinder axis so as to form ellipses; and, in a second version, the encircling grooves are formed in a partial spiral with a connecting return leg to provide a greater than 180.degree. metering range. Both configurations have groove areas greater than the orifice area to insure a low pressure condition in the groove such that the primary resistance to flow is defined by turbulent flow through the orifice.
REFERENCES:
patent: 4059175 (1977-11-01), Dressell, Jr. et al.
patent: 4174098 (1979-11-01), Baker et al.
Dressell, Jr. Richard G.
Heideman Robert J.
Butler Douglas C.
Enertrols, Inc.
LandOfFree
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 Shock absorber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shock absorber will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1060499