Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Checks and closers – Liquid
Patent
1976-10-26
1978-08-01
Feldbaum, Ronald
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Checks and closers
Liquid
E05F 320
Patent
active
041033922
ABSTRACT:
An apparatus for automatically closing a door with respect to a fixed support adjacent thereto which includes a torsional spring, a one-way clutch mechanism and a swash plate hydraulic damper concealably retained within a compact housing. The housing is secured to either the door or the fixed support and a first rotatable portion of the one-way clutch is coupled to the other of either of the door or fixed support so that the first rotatable portion rotates in a first direction when the door is opened in the opposite direction when the door is closed. The torsional spring is at least partially disposed about the one-way clutch mechanism and has one end anchored to the housing and the other end secured for movement with the first rotatable portion. As the door is opened, the first rotatable portion is rotated in the first direction to wind up the torsional spring. When the door is released, the torsional spring unwinds to reverse the process and close the door. As the torsional spring unwinds, the first rotatable portion is driven in the opposite direction causing the one-way clutch mechanism to drive a second rotatable portion in the opposite direction as well. The swash plate hydraulic damper includes a plurality of piston chambers formed in the second rotatable portion, a closed hydraulic circuit interconnecting the piston chambers, and a piston element slidably disposed in each of the chambers for sealing the same and having an end portion extending therefrom. The hydraulic damper includes a wedge-shaped swash plate whose upper surface operatively engages the exposed end portions of the piston elements to restrict the rotation of the second rotatable portion so as to control the rate at which the spring unwinds to close the door. The resistance encountered by the pistons can be selectively varied by adjusting the rotational position of the swash plate with respect to the bottom of the housing. In the preferred embodiment disclosed herein, the compact housing forms the central portion of an ordinary hinge having one plate secured to the door and the other plate secured to the door casing although the housing could be mounted on or within the door itself. The compact assembly of the present invention enables a door to be automatically closed with a relatively constant closing force and provides a means whereby the force may be selectively adjusted.
REFERENCES:
patent: 1824217 (1931-09-01), Kreiner
patent: 2200865 (1940-05-01), Stannard
patent: 2591476 (1952-04-01), Swanson
patent: 3117340 (1964-01-01), Arboll
patent: 3118167 (1964-01-01), Morr et al.
patent: 3778866 (1973-12-01), Nakanishi
Feldbaum Ronald
Masco Corporation
LandOfFree
Door closing apparatus 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 closing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Door closing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1973679