Hydrostatic power unit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 30, 2017
Issued Date -
N/A
app pub date -
Aug 5, 2014
filing date -
Aug 22, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hydrostatic power unit (2) comprises a variable displacement machine with a continuously variable displacement volume and is operated as a pump and motor and is in a drive connection with an internal combustion engine (3). When operated as a pump, the power unit sucks hydraulic fluid out of a tank (9) and delivers into a delivery side (P), and, when operated as a motor, functions as a hydraulic starter to start the internal combustion engine (3). When operated as a motor, the power unit is supplied with hydraulic fluid from a hydraulic accumulator (30). The displacement volume of the power unit (2) is set by a displacement volume control device (60) actuated by a positioning piston device (61) supplied with hydraulic fluid from a charging pressure circuit (23). The power unit (2) includes a supplemental positioning piston device (80) in an operative connection with the displacement volume control device (60) and which is actuated directly by the pressure present in the hydraulic accumulator (30). By means of a connection of the supplemental positioning piston device (80) with the hydraulic accumulator, the power unit (2) can be adjusted to increase the displacement volume to start the internal combustion engine (3).
First Claim
Other Claims data not available
Family
International Classification(s)
- 2014 Application Filing Year
- B60K Class
- 2032 Applications Filed
- 1782 Patents Issued To-Date
- 87.70 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- B60K Class
- 0 % this patent is cited more than
- 8 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 | Nov 30, 2024 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Nov 30, 2028 |
