Door closer
First Claim
1. A door closer comprising,(a) a tubular housing, a bushing at one end, a rigid rod extending through the bushing and extending axially of the housing to be movable longitudinally of the housing,(b) resilient means for urging said rod inwardly of the housing,(c) fluid control means in said housing comprising a fluid filled chamber defined by the housing and a piston carried by said rod and slidable in said fluid filled chamber, the chamber being divided into two compartments and incorporating valve means between said compartments which permit relatively free movement of the fluid from one compartment to the other when the rod is moved outwardly of the housing but which when the rod is moved inwardly affords sufficient resistance to movement of the fluid as to check the rate at which the rod is moved under the force of said resilient means,(d) a fixing plate and articulated connecting means for connecting said plate to said rod, said connecting means comprising a rigid link.
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Accused Products
Abstract
A door closer with integral check action comprising a rigid rod movable inwardly and outwardly of a tubular housing which is adapted to be mounted on a door. The rigid rod is pivotally connected to a rigid link plate itself pivotally connected to a fixing plate for mounting on the door frame. A spring within the housing urges the rod inwardly to close the door. On one side of a transverse wall, through which the rod extends, is a fluid filled chamber in which moves a piston, carried by the rigid rod. Valve means on the piston act to resist only inward movement of the piston as the door is closed by the force of said spring and the rate of closure of the door is thereby controlled without substantially restricting outward movement of the piston in response to opening of the door.
28 Citations
8 Claims
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1. A door closer comprising,
(a) a tubular housing, a bushing at one end, a rigid rod extending through the bushing and extending axially of the housing to be movable longitudinally of the housing, (b) resilient means for urging said rod inwardly of the housing, (c) fluid control means in said housing comprising a fluid filled chamber defined by the housing and a piston carried by said rod and slidable in said fluid filled chamber, the chamber being divided into two compartments and incorporating valve means between said compartments which permit relatively free movement of the fluid from one compartment to the other when the rod is moved outwardly of the housing but which when the rod is moved inwardly affords sufficient resistance to movement of the fluid as to check the rate at which the rod is moved under the force of said resilient means, (d) a fixing plate and articulated connecting means for connecting said plate to said rod, said connecting means comprising a rigid link.
Specification