Door closer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 16, 2016
Grant Date -
Dec 3, 2015
app pub date -
Nov 5, 2013
filing date -
Mar 4, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed is a door closer that can easily adjust the spring force of a return spring. A piston 2 moves toward a first oil chamber 15 upon a door opening operation and moves toward a second oil chamber 16 upon a door closing operation. A return spring 50 is located on the same line as the piston 2. The return spring 50 is interposed between a spring retaining seat on a fixed side close to a main shaft 3 and a spring retaining seat on a moving side distant from the main shaft 3. The return spring 50 is compressed by the spring retaining seat on the moving side moving closer to the spring retaining seat on the fixed side upon the door opening operation and then stores the closing force. The door closer includes a spring force adjustment mechanism configured to change the position of a spring retaining member 40, which has the spring retaining seat on the fixed side, in the axial direction of the piston 2 with respect to the main body housing 1, and configured to adjust the spring force of the return spring 50 by changing the position of the spring retaining member 40 through an operation from the outside of the main body housing 1.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2013 Application Filing Year
- E05F Class
- 319 Applications Filed
- 263 Patents Issued To-Date
- 82.45 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- E05F Class
- 0 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 16, 2028 |
