US PATENT SUBCLASS 188 / 290
.~ Using a rotary-type fluid damper

Current as of: June, 1999
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188 /   HD   BRAKES

266  DF  INTERNAL-RESISTANCE MOTION RETARDER {29}
290.~ Using a rotary-type fluid damper {4}
291  DF  .~.~> Including clutch
292  DF  .~.~> Gear pump
293  DF  .~.~> Driving relatively moving element which causes flow of brake fluid {2}
296  DF  .~.~> Driving radial vanes which cause toroidal flow of brake fluid

DEFINITION

Classification: 188/290

(under subclass 266) Device wherein said moving mechanism turns about an axis in only one direction of turning and is connected to said first member, whereby turning of the moving mechanism is restrained by relative motion between the first member and a fluid medium.

(1) Note. In this and indented subclasses the load member or mechanism is usually a wheel or axle on a vehicle, but may be a pulley, drum, shaft or any one-way rotating mechanism, the rotation of which is to be retarded. The load member usually causes rotation of vanes or blades within a fluid, or rotation of said load member is mechanically converted into reciprocation of a vane or a piston within a cylinder or into rotation plus oscillation of vanes within a housing for fluid, but in all such cases, flow of fluid is effected and such flow is restricted to retard rotation of the load member.

(2) Note. The definition and note does not bar placement of a patent disclosing rotation in either or both of two directions (e.g., clockwise and/or counterclockwise). However, it should be clear that the action of the brake when the member rotates in either direction is the same as if the member were rotating in one direction only.

SEE OR SEARCH CLASS

192, Clutches and Power-Stop Control,

58.1+, for a internal resistance motion retarder for a clutch with unidirectionally rotating load member.