Apparatus and method for rotating tube adjustment and visually indicating spring force in a door operator or closer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 4, 2017
Issued Date -
N/A
app pub date -
Oct 1, 2015
filing date -
Oct 2, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An apparatus for adjusting the force in a door operator or closer includes a tube rotatable about a longitudinal axis and a coil spring therein connected to door operator/closer. A fixed adjusting screw extends along the longitudinal axis of the housing through the coil spring and a spring collar is threaded onto the adjusting screw and rotatable with the tube. The spring collar bears on the distal end of the spring to vary the spring compression upon rotation of the housing and thereby vary force applied by the door operator or closer. The housing has an opening though which the spring is visible, and the tube has markings indicating the degree of spring compression. An indicator is moveable along and visible outside the housing to indicate the compression of the spring.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2015 Application Filing Year
- E05F Class
- 531 Applications Filed
- 417 Patents Issued To-Date
- 78.54 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 20 Citation Count
- E05F Class
- 95.10 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jan 4, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 4, 2029 |
