Cylinder device with force multiplier
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 10, 2017
Grant Date -
Jan 1, 2015
app pub date -
Feb 12, 2013
filing date -
Feb 16, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An output rod (27) is inserted in a housing (4) so as to be movable vertically. A first piston (41) inserted in a lower part of the housing (4) is fixed to the output rod (27). A second piston (42) inserted on an upper side of the first piston (41) is fitted on the output rod (27) so as to be movable vertically. A lock chamber (44) is provided between the first piston (41) and the second piston (42). A first release chamber (51) is provided below the first piston (41). A second release chamber (52) is provided above the second piston (42). During force multiplication driving of the output rod (27), a pressurized fluid in the lock chamber (44) carries out the force multiplication driving with respect to the output rod (27) downward via the second piston (42) and engaging balls (69). A retaining spring (60) which biases the second piston (42) upward is provided in the lock chamber (44) between the first piston (41) and the second piston (42).
First Claim
Other Claims data not available
Family
International Classification(s)
- 2013 Application Filing Year
- B23Q Class
- 473 Applications Filed
- 407 Patents Issued To-Date
- 86.05 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- B23Q Class
- 31.14 % this patent is cited more than
- 8 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 | Jul 10, 2028 |
