Damper

Details Damper Damper

1985-09-04

1987-03-31

Halvosa, George E. A.

Brakes

Internal-resistance motion retarder

Using a rotary-type fluid damper

16 51, 18832221, 1883225, 192 58B, F16D 5700

Patent

active

046536167

ABSTRACT:
A damper for braking the opening speed of the hatch of a cassette tape holder of a recorder comprises a rotary member such as a gear member and a supporting member for supporting the rotary member, a viscous substance for producing a braking torque being charged in a clearance between the rotary member and the supporting member. The damper is characterized by being provided with an injection opening for injecting the viscous substance into the clearance and an air-escape portion for allowing air contained in the clearance to escape, the air-escape portion being positioned remote from the injection opening, whereby the clearance can be uniformly charged with the viscous substance without air being mixed therewith.

REFERENCES:
patent: 2607548 (1952-08-01), Hollander
patent: 3651903 (1972-03-01), Butler et al.
patent: 3678782 (1972-07-01), Aoki
patent: 4426752 (1984-01-01), Nakayama
patent: 4513473 (1985-04-01), Omata
patent: 4527675 (1985-07-01), Omata et al.
patent: 4565266 (1986-01-01), Omata

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