US PATENT SUBCLASS 267 / 221
.~.~.~ Helical coil spring

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}
217  DF  .~.~ Fluid retarder {4}
221.~.~.~ Helical coil spring {4}
222  DF  .~.~.~.~> Quadrilateral suspension
223  DF  .~.~.~.~> And rocking actuator arm or rotary fluid displacement member {1}
225  DF  .~.~.~.~> Plural mechanical springs for biasing vehicle parts
226  DF  .~.~.~.~> Spring within coaxial fluid chamber

DEFINITION

Classification: 267/221

Helical coil spring:

(under subclass 217) Spring device wherein the spring element is a helical coil-spring*.

SEE OR SEARCH THIS CLASS, SUBCLASS:

34, for a fluid spring combined with a helical coil-spring.