Vacuum assembly

Details Vacuum assembly Vacuum assembly

1975-05-22

1976-04-20

Wood, Jr., M. H.

Cutlery

F16C 124

Patent

active

039514781

ABSTRACT:
A rotating vacuum shaft assembly includes a housing, a hollow shaft positioned in an opening in the housing and at least one seal made of a fluorocarbon polymer material disposed in the region around the shaft to permit a vacuum to be drawn through the shaft while it is rotated. The seal has deformable ribs which contact the surface of the shaft and the internal walls of the housing, the ribs deforming when a pressure difference exists across the seal thereby enhancing the quality of the seal.

REFERENCES:
patent: 2518338 (1950-08-01), Lampe
patent: 2713522 (1955-07-01), Petch
patent: 2776173 (1957-01-01), Rudy
patent: 3062555 (1962-11-01), Britton
patent: 3125126 (1964-03-01), Engels
patent: 3168320 (1965-02-01), Sneed
patent: 3220756 (1965-11-01), Templeton
patent: 3400988 (1968-09-01), Hudson et al.

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