Pneumatic door-closer usable for left-hinged and right-hinged do

Details Pneumatic door-closer usable for left-hinged and right-hinged do Pneumatic door-closer usable for left-hinged and right-hinged do

1989-08-01

1991-02-12

Seidel, Richard K.

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

Checks and closers

Pneumatic

16 58, E05F 300

Patent

active

049912550

ABSTRACT:
A pneumatic door-closer includes a door-closer body pivoted to a generally L-shaped crank unit which is mounted pivotally on a support. The unit includes a long crank arm member and a short crank arm member, and can be adjusted to change the positions of the members relative to the support. The adjustable connection of the crank unit to the support enables the door-closer to work regardless of whether the left or the right side of the associated door is hinged to a door frame. The piston rod of the body has a right-hand screw portion engaged threadedly with a piston body, and a left-hand screw end portion engaged with a nut for retaining the piston body on the piston rod.

REFERENCES:
patent: 893185 (1908-07-01), Mick
patent: 3934306 (1976-01-01), Farris
patent: 4287639 (1981-09-01), Denton
patent: 4817238 (1989-04-01), Liu

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