Locking device, particularly for double-hung windows
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 19, 2014
Grant Date -
Feb 6, 2014
app pub date -
Aug 2, 2012
filing date -
Aug 2, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A sash lock mechanism of all-plastic construction incorporating a plastic detent spring arrangement having operating characteristics equal or superior those of conventional metallic springs while providing a more economical manufacture and assembly. The detent spring is of closed rectangular form, with inwardly bowed side elements positioned to act on opposite sides of a detent cam positioned between them, and connected at their ends by integral end and corner elements. The end and corner elements are closely confined against outward movement, causing the inwardly bowed side elements to be significantly more resistant to outward displacement by the detent cam when operating the lock. The arrangement provides a superior “feel” and snap-action effect than expected from all-plastic detent mechanisms for the purposes intended.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2012 Application Filing Year
- E05C Class
- 294 Applications Filed
- 241 Patents Issued To-Date
- 81.98 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 8 Citation Count
- E05C Class
- 6.47 % this patent is cited more than
- 11 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 19, 2026 |
