Variable position door holder and stop

Details Variable position door holder and stop Variable position door holder and stop

1991-06-12

1992-03-17

Spruill, Robert L.

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

Closure checks

188284, 188288, E05F 502, F16F 948

Patent

active

050955810

ABSTRACT:
A mechanism is provided for maintaining an open door in a selected fixed position includes a hydraulic cylinder having first and second ends. One end of a shaft axially disposed in the cylinder, passes through a hydraulic seal at one end of the cylinder. A piston is axially disposed on the shaft near its other end, and includes o-rings for sealing it against the cylinder walls. The piston includes first and second axially-disposed bores. First and second discs, each including an aperture are axially mounted on the shaft in contact with the opposing faces of the piston and are positioned such that the aperture of each is substantially aligned with one of the bores and blocks the other bore. The discs are held against the faces of the piston with a predetermined amount of force.

REFERENCES:
patent: 1592912 (1926-07-01), Thompson
patent: 4838393 (1989-06-01), Mourray et al.

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