Door closer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jul 25, 2017
Issued Date -
N/A
app pub date -
Oct 18, 2016
filing date -
Aug 1, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hydraulic door closer is disclosed. The hydraulic door closer may include a top cap surrounded by an O-ring that is located at the top of the hydraulic door closer housing opposite a spindle to seal the hydraulic fluid within the housing. In addition to or in lieu of the top cap design, the door closer may include a locking washer to secure the valves to the housing; epoxy and an O-ring at the interface between the top cap and the housing of the door closer; use of a dual-walled rubber seal around the spindle; use of dual O-rings on each valve stems; use of caps that are made of the same material as the housing instead of aluminum and use of epoxy on the end caps; and/or use of backcheck with an adjustable spring.
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