Telescopic rack-and-pinion lifting device
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United States of America Patent
Stats
-
Sep 23, 2014
Grant Date -
Jul 19, 2012
app pub date -
Jan 24, 2012
filing date -
Jul 20, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A lifting device with a telescopic pole that has a lower module and an upper module which is mounted in vertical sliding relation with respect to the lower module and which is movable along the pole by a crank handle through a rack-and-pinion drive mechanism. A non-return locking device is automatically implemented by friction coupling mechanism with a drive pinion of the drive mechanism driven by rotating the crank handle for more than one complete turn.
First Claim
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International Classification(s)
- 2012 Application Filing Year
- B66F Class
- 236 Applications Filed
- 185 Patents Issued To-Date
- 78.39 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 14 Citation Count
- B66F Class
- 94.34 % 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 | Mar 23, 2026 |
