US PATENT SUBCLASS 267 / 137
.~ Tool movement dampening

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

136  DF  RESILIENT SHOCK OR VIBRATION ABSORBER {8}
137.~ Tool movement dampening

DEFINITION

Classification: 267/137

(under subclass 136) Spring device in which the body constitutes means in moving contact with work to modify the work and in which the spring device minimizes undesirable oscillation incident to said movable contact and work modification.

SEE OR SEARCH THIS CLASS, SUBCLASS:

125, for a piston-type fluid spring device for dampening the operation of a well drill.