Mechanical door check

Details Mechanical door check Mechanical door check

1989-09-06

1991-09-17

Spruill, Robert L.

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

Checks and closers

Spring and gear

16 49, E05F 300

Patent

active

050481517

ABSTRACT:
Herein disclosed is a continuous speed change type door check for closing a door, which comprises: a pivot pin made rotatable; a slider adapted to be linearly moved by the rotations of the pivot pin and to rotate the pivot pin when it returns; a coil spring for biasing the slider to return; a gear train for speeding up the rotations of the pivot pin; a brake connected to the gear train; and a one-way transmission clutch for operating the brake in a direction to close the door.

REFERENCES:
patent: 581972 (1897-05-01), Wright
patent: 696116 (1902-03-01), Taylor
patent: 1918879 (1933-07-01), Welton

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