Hydraulic piston machine, in particular water hydraulic machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 13, 2018
Issued Date -
N/A
app pub date -
Dec 2, 2010
filing date -
Dec 3, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention concerns a hydraulic piston machine, in particular a water hydraulic machine, with at least one cylinder, in which a piston (4) is arranged to reciprocate, the piston (4) comprising a hollow that is surrounded by an annular wall and has one open end. It is endeavored to keep cavitations small. For this purpose, a filling member (13) is arranged in the hollow (12), the filling member (13) having at least a radial projection (22) and the annular wall (16) having at least a radial depression (17) in the inside facing the hollow (12), or the annular wall (16) having a radial projection and the filing member (13) having a radial depression, the depression having a restraint (19), at least at the end adjacent to the open end (18) of the hollow (12), and the projection (22) and the depression (17) engaging each other.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2010 Application Filing Year
- F04B Class
- 757 Applications Filed
- 507 Patents Issued To-Date
- 66.98 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F04B Class
- 0 % this patent is cited more than
- 7 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Sep 13, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 13, 2029 |
