Apparatus for the transmission of rotary motion through the wall

Details Apparatus for the transmission of rotary motion through the wall Apparatus for the transmission of rotary motion through the wall

1988-06-22

1989-05-09

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277177, F16J 1518

Patent

active

048282731

ABSTRACT:
Rotary lead-throughs through the wall of vacuum chambers have to be lubricated until now in order to avoid cold welding of a metallic shaft with vacuum sealing rings of the lead-through. The invention pertains to a new construction in which the inner wall of a bore through the wall of the vacuum chamber, through which the shaft is led, is lined with a sleeve of a low-friction synthetic material, preferentially polytetrafluoro-ethylene, with the sleeve being sealed against the inner wall and against the shaft by sealing rings, preferentially made of an elastomer. Through this construction, constant minimum friction, without the necessity of using additional lubricating agents and reliable sealing in dry operation, even under maximum stress, are acheived.

REFERENCES:
patent: 3331609 (1967-07-01), Moran
patent: 3526407 (1970-09-01), Chattin et al.
patent: 4020910 (1977-05-01), Peterson et al.
patent: 4645216 (1987-02-01), Selvatici

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