US PATENT SUBCLASS 277 / 400-- .~.~.~ Hydrodynamic feature

US PATENT SUBCLASS 277 / 400
.~.~.~ Hydrodynamic feature

Current as of: June, 1999
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277 /	HD	SEAL FOR A JOINT OR JUNCTURE

345	DF	SEAL BETWEEN RELATIVELY MOVABLE PARTS (I.E., DYNAMIC SEAL) {10}
358	DF	.~ Relatively rotatable radially extending sealing face member (e.g., face, mechanical, etc.) {9}
399	DF	.~.~ Particular sealing face member configuration {4}
400		.~.~.~ Hydrodynamic feature

DEFINITION

Classification: 277/400

Hydrodynamic feature:

(under subclass 399) Particular sealing face member configuration wherein the sealing face member has means to create turbulence against the opposing sealing face.

(1) Note. In a hydrodynamic, relatively rotatable, radially extending, sealing face member (e.g., face, mechanical, etc.), a distance between a sealing member and a part or another sealing member will change when the rotational speed between relatively movable parts goes from normal operation to slower or nonrotational speeds whereas in a close proximity seal (e.g., contactless, fluent, etc.), the distance is not dependent upon rotational speed.