Method of opening a knife blade
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 5, 2013
Grant Date -
Jun 13, 2013
app pub date -
Jan 29, 2013
filing date -
Sep 5, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
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Abstract
A folding knife incorporates an opening assist mechanism that functions to drive the blade from the closed to the open position. A torsion spring is retained axially on the blade axis pin and within a bushing that is stationary relative to the knife handle. One leg of the spring is fixed relative to the handle. The opposite leg of the spring extends through and rides in a partial annular groove in the bushing and acts on the blade as it is moved between the open and closed positions.
First Claim
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International Classification(s)
- 2013 Application Filing Year
- B26B Class
- 242 Applications Filed
- 220 Patents Issued To-Date
- 90.91 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 11 Citation Count
- B26B Class
- 68.29 % this patent is cited more than
- 12 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 | May 5, 2025 |
