Drop-proof and dust-proof device in rotary operation section of

Details Drop-proof and dust-proof device in rotary operation section of Drop-proof and dust-proof device in rotary operation section of

1978-05-17

1984-04-03

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 88, F16J 1532

Patent

active

044404034

ABSTRACT:
Eccentricity between an external knob and camera casing is accommodated by providing a flexible rubber ring between the two which will bend during a change in their relative positions so that a good seal is continuously maintained. Sealing can also be enhanced by extending the rubber gripping ring around the circumference of the knob down to the camera casing so that the sealing and operating rings are integral.

REFERENCES:
patent: 795283 (1905-07-01), Hull
patent: 2107179 (1938-02-01), Gibbs
patent: 2937039 (1960-05-01), Santapa
patent: 3510138 (1970-05-01), Bowen et al.
patent: 4061345 (1977-12-01), Lund
patent: 4085941 (1978-04-01), Wilkerson
patent: 4142731 (1979-03-01), Filippou et al.

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