Pneumatic door closer
AssigneeSolid Well International Corp.
InventorChun-Hsien Lin
Life of this patent
Estimating the term…
Abstract
A door closer is set forth having a housing, a plunger rod in the housing with a plunger at the inner end of the rod, and a main spring around the rod between the plunger and a housing end for urging the rod into the housing. An actuator carried at the housing end with an opening for the rod and mounted for transverse sliding motion relative to the rod, with a spring for urging the actuator into a latch space in the rod is utilized. With the door closer connected to a door, the actuator slides into the latch space when the door has been opened, to hold the door open. A further opening movement raises the actuator out of the latch space and a sleeve maintains the actuator raised, permitting closing of the door.
Claims9
In a hold open device for a door closer having a housing, a plunger rod slidingly carried in an end of said housing, a plunger at the inner end of said rod, and a mainspring positioned about said rod between said housing and said plunger,
- the improvement including a combination:
- an actuator carried on said housing for transverse sliding motion relative to said rod, said actuator having an opening for said rod;
- said rod including a collar and latch means defining a latch space on said rod;
- a sleeve slidingly positioned on said collar;
- and
- hold open means positioned between said housing and said actuator for urging said actuator transversely toward said rod into latching engagement with said latch means.
Dependencies are inferred from the claim text.