Radial piston hydraulic motor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 31, 2017
Grant Date -
Oct 9, 2014
app pub date -
Apr 4, 2014
filing date -
Apr 5, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to a radial piston hydraulic motor. The radial piston hydraulic motor comprises a cam ring provided, with a wave-shaped inner surface and radial cylinders provided in the inner part inside the cam ring and pistons that move therein as well as rollers coupled to the pistons so as to follow the inner surface of the cam ring. By the effect of the working pressure of hydraulic oil conveyed to the cylinders, the rollers that are pressed against the inner surface of the cam ring provide a rotating movement of the cam ring and the inner part relative to each other. The hydraulic motor is provided with disengaging members disengaging the rollers coupled to the pistons from contact to the inner surface of the cam ring when the working pressure stops acting in the cylinders for bringing the hydraulic motor into freewheeling. The hydraulic motor is provided with a control coupling which, when the prevailing pressure of hydraulic oil in the working pressure line that leads to the cylinders drops below a specific level, automatically disengages the cylinders from the working pressure line and couples the hydraulic motor into freewheeling.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2014 Application Filing Year
- F04B Class
- 1041 Applications Filed
- 888 Patents Issued To-Date
- 85.31 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- F04B Class
- 31.99 % 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 31, 2028 |
