US PATENT SUBCLASS 267 / 205
.~.~.~ Including cam or wedge friction element or actuator therefor

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}
205.~.~.~ Including cam or wedge friction element or actuator therefor {4}
206  DF  .~.~.~.~> Helical cam surface
207  DF  .~.~.~.~> Plural axially spaced expandable friction rings
208  DF  .~.~.~.~> Including relatively rotating friction surfaces (e.g., drum type)
209  DF  .~.~.~.~> Including helical coil spring {3}

DEFINITION

Classification: 267/205

Including cam or wedge friction element or actuator therefor:

(under subclass 196) Spring device including two members or portions having contacting relatively moving surfaces, wherein at least one of the surfaces is sloped or curved to force the friction surfaces against each other.

(1) Note. The cam or wedge surface may also serve as the "friction surfaces".

SEE OR SEARCH THIS CLASS, SUBCLASS:

201+, for a retarder which employs a cam or wedge for compressing an elastomeric friction element.

SEE OR SEARCH CLASS

213, Railway Draft Appliances,

32+, for similar devices which are peculiar to railway use.