US PATENT SUBCLASS 267 / 215
.~.~.~.~ Relatively rotating friction surfaces (e.g., drum type)

Current as of: June, 1999
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267 /   HD   SPRING DEVICES

2  DF  VEHICLE {14}
195  DF  .~ Mechanical spring and nonresilient retarder (e.g., shock absorber) {2}
196  DF  .~.~ Friction (e.g., "snubber") {7}
214  DF  .~.~.~ Friction surface formed on or biased by additional spring {1}
215.~.~.~.~ Relatively rotating friction surfaces (e.g., drum type)

DEFINITION

Classification: 267/215

Relatively rotating friction surfaces (e.g., drum type):

(under subclass 214) Spring device wherein one of the rubbing surfaces is caused to revolve or swing while in contact with the other surface.