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Class Information
Number: 188/283.1
Name: Brakes > Internal-resistance motion retarder > Piston having a restrictable opening (e.g., apertured plate) in a fixed volume chamber > Vortex flow passages
Description: Piston restrictable opening in which the element is designed to create an outward rotating effect to damp.

Patents under this class:

Patent Number Title Of Patent Date Issued
8157064 Shock absorber for drawer Apr. 17, 2012
5070972 Vortex valving assembly for a hydraulic damper Dec. 10, 1991
4515252 Piston stroke responsive vortex-flow shock absorber May. 7, 1985
4502575 Shock absorber Mar. 5, 1985
4457409 Vortex shock absorber with absorbing force relief means Jul. 3, 1984
4442925 Vortex flow hydraulic shock absorber Apr. 17, 1984
4418802 Shock absorber Dec. 6, 1983
4407397 Shock absorber with pressure-relief mechanism Oct. 4, 1983
4335644 Fluidic recoil buffer for small arms Jun. 22, 1982

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