US PATENT SUBCLASS 415 / 168.3
.~.~ Screw type pumping seal

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


415 /   HD   ROTARY KINETIC FLUID MOTORS OR PUMPS

168.1  DF  INCLUDING MEANS FOR HANDLING WORKING FLUID LEAKAGE {1}
168.2  DF  .~ Leakage through seal between runner or shaft and static part {2}
168.3.~.~ Screw type pumping seal

DEFINITION

Classification: 415/168.3

Screw type pumping seal:

(under subclass 168.2) Device wherein the (seal) structure comprises a helical groove located at the interface between the runner* or shaft* and the fixed element, which groove rotates relative to the runner or the fixed element to drive the working fluid* between the runner or shaft and the fixed element in a direction parallel to the runner's axis of

rotation.

(1) Note. The groove may be part of the runner or the fixed element.