Air damper

Details Air damper Air damper

1992-06-17

1993-06-22

Bray, W. Donald

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Checks and closers

Pneumatic

16 84, 92 26, 188282, 188311, 18832217, 267225, E05F 1600, F16F 950

Patent

active

052207064

ABSTRACT:
An air damper utilizing only recirculating internal air for dampening in one direction of movement an openable object includes inner and outer cylinder members, primary and secondary shafts, first and second controllable orifice structures, primary and secondary end caps, and primary and secondary compression springs. The first controllable orifice structure restrains the flow of air from a first shaft chamber to the first head chamber to pass only through a first orifice in accordance with the movement of the primary shaft in a first axial direction. The second controllable orifice structure restrains the flow of air from a second shaft chamber to a second head chamber to pass only through a second orifice in accordance with the movement of the secondary shaft in the first axial direction.

REFERENCES:
patent: 2881467 (1951-04-01), Struhar
patent: 4924285 (1990-12-01), Enrietti

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