Oil filled rotary damper having a symmetrically shaped flexible membrane
First Claim
1. A rotary oil type damper, comprising:
- a housing;
a rotor comprising a shaft having a leading end thereof extending out of said housing and provided at a basal portion thereof with a flared part radially diverged downwardly and a braking disk extending from said flared part and integrally formed with said shaft and accommodated within said housing;
a centrally through apertured flexible membrane formed substantially symmetrically with respect to the observe and reverse sides thereof, inserted around said flared part of said rotor for sealing with the same, and positioned in said housing overlying but not normally contacting said braking disk; and
a quantity of oil placed within said housing around said braking disk.
1 Assignment
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Accused Products
Abstract
An oil type damper for braking and absorbing the opening-closing motion of a lid in a cassette tape recorder, video recorder or the like is improved by incorporating therein a flexible membrane formed in a structure symmetrical with respect to the obverse and reverse sides thereof, interposed between a housing and a braking disk, and adapted to absorb thermal expansion of oil and produce a sealing effect and, at the same time, causing the shaft projected from the braking disk for supporting the flexible membrane in place to contain a flared base radially diverged downwardly. Since the flexible membrane has a structure symmetrical with respect to the obverse and reverse sides thereof, the possibility of incorrect assembly of the oil type damper is minimized and the operational efficiency of damper production is increased without sacrificing sealing effect.
71 Citations
5 Claims
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1. A rotary oil type damper, comprising:
- a housing;
a rotor comprising a shaft having a leading end thereof extending out of said housing and provided at a basal portion thereof with a flared part radially diverged downwardly and a braking disk extending from said flared part and integrally formed with said shaft and accommodated within said housing;
a centrally through apertured flexible membrane formed substantially symmetrically with respect to the observe and reverse sides thereof, inserted around said flared part of said rotor for sealing with the same, and positioned in said housing overlying but not normally contacting said braking disk; and
a quantity of oil placed within said housing around said braking disk. - View Dependent Claims (2, 3, 4, 5)
- a housing;
Specification