Door and window closer

Details Door and window closer Door and window closer

1975-08-07

1977-01-18

Schroeder, Werner H.

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

Closers

Spring

16 81, 16DIG21, 49404, E05F 102, E05F 108

Patent

active

040031020

ABSTRACT:
A spring or gravity motor having an override mechanism for a movable window or door including a pneumatic cylinder, a piston, a check valve admitting air to the cylinder, an override valve permitting pressure dumping of the air in the cylinder during movement of the door or window at a speed greater than the normal closing speed by the motor.

REFERENCES:
patent: 1871030 (1932-08-01), Bommer
patent: 2735675 (1956-02-01), Lindsey
patent: 3334444 (1967-08-01), Hargrove
patent: 3389422 (1968-06-01), Glenn

Affiliated with

Also associated with

Rating

Door and window closer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Door and window closer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Door and window closer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-64054