Door closer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 28, 2006
Grant Date -
May 22, 2003
app pub date -
Oct 10, 2002
filing date -
Oct 11, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A door closer comprising a housing, a member for driving engagement with a door, the member being rotatable relative to the housing in a door opening direction and in a door closing direction, a spring apparatus within the housing providing a resilient bias, the resilient bias being increased by rotation of the member in the door opening direction and a check device for controlling rotation of the member in the door closing direction and hence closure of the door under the action of the spring apparatus, the door closer having a back check comprising a piston member movable in a cylinder from an initial position against resistance of a fluid medium by rotation of the rotatable member in the opening direction.
First Claim
Other Claims data not available
