Infinitely-variable, hydro-mechanical transmission using fixed displacement pumps and motors
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 19, 2013
Grant Date -
Mar 10, 2011
app pub date -
Mar 21, 2010
filing date -
Sep 4, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
This invention consists of two or more fixed displacement hydraulic pump/motors mounted on a common input shaft hydraulically connected to two or more fixed hydraulic pump/motors mounted on a common output shaft. The relative displacements of the pump/motors are chosen such that by selectively activating the individual pump/motors, the transmission ratio can be changed in the case when the input devices and acting as pumps driving the output devices as motors (conversely when driving the vehicle in reverse). Further, a hydraulic accumulator and reservoir are attached in a manner that allows the pressurized fluid to augment the flow produce by the input pumps in order to increase the transmission ratio. Similarly, the transmission ratio can also be reduced by causing the input pumps to pump fluid into the accumulator at the same time they are pumping fluid through the output motors. The transmission also contains a single speed all mechanical by-pass for use when cruising and an input reduction gear to increase the torque and power capacity of the transmission.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2010 Application Filing Year
- F16D Class
- 905 Applications Filed
- 594 Patents Issued To-Date
- 65.64 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 18 Citation Count
- F16D Class
- 83.38 % this patent is cited more than
- 12 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 | May 19, 2025 |
