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US 5,555,727 AGranted
Auxiliary pumps for axle driving apparatus including hydrostatic transmission
AssigneeHydro-Gear
InventorsRay Hauser, Daryl Smothers, John Schreier
Life of this patent
Estimating the term…
Abstract
Means for connecting auxiliary pumps and charge pumps to an axle driving apparatus to transfer power from a light duty vehicle engine to an output axle, wherein the charge and/or auxiliary pumps are mounted to the external housing for an integrated hydrostatic transmission or to the external housing for a hydrostatic transmission which is connected to separate axle mechanisms.
Claims23
An apparatus for transmitting power from a vehicle engine to an output shaft, comprising:
- a housing having an opening formed therein;
- a hydrostatic transmission disposed substantially within said housing, said hydrostatic transmission comprising a center section, disposed in communication with said opening, having hydraulic porting formed therein;
- a pump mounted on said center section and drivingly linked to said vehicle engine;
- and a motor mounted on said center section and hydraulically connected through said hydraulic porting to said pump, said motor being drivingly connected to said output shaft;
- a sump containing hydraulic fluid in flow communication with said hydrostatic transmission for supplying hydraulic fluid thereto;
- and
- an auxiliary pump in flow communication with said sump disposed adjacent to the external surface of said housing.
4 more elements
An apparatus for transmitting power from a vehicle engine to an output shaft, comprising:
- a housing having an opening formed therein;
- a hydrostatic transmission disposed substantially within said housing, said hydrostatic transmission comprising a center section, disposed in communication with said opening, having hydraulic porting formed therein;
- a pump mounted on said center section and drivingly linked to said vehicle engine;
- and a motor mounted on said center section and hydraulically connected through said hydraulic porting to said pump, said motor being drivingly connected to said output shaft;
- a sump containing hydraulic fluid in flow communication with said hydrostatic transmission for supplying hydraulic fluid thereto;
- and
- a charge pump and associated auxilliarly pump disposed adjacent to the external surface of said housing in flow communication with said hydrostatic transmission and said sump respectively.
4 more elements
An apparatus for transmitting power from a vehicle engine to an output axle, comprising:
- a housing having an opening formed therein;
- a hydrostatic transmission disposed substantially within said housing, said hydrostatic transmission comprising a center section, disposed in communication with said opening, having hydraulic porting formed therein;
- a pump mounted on said center section and drivingly linked to said vehicle engine;
- and a motor mounted on said center section and hydraulically connected through said hydraulic porting to said pump, said motor being drivingly connected to an output shaft;
- a sump containing hydraulic fluid in flow communication with said hydrostatic transmission for supplying hydraulic fluid thereto;
- gearing means substantially disposed within said housing for transmitting power from said output shaft to said output axle;
- and
- an auxiliary pump in flow communication with said sump disposed adjacent to the external surface of said housing.
5 more elements
An apparatus for transmitting power from a vehicle engine to an output shaft, comprising:
- a housing;
- a hydrostatic transmission disposed substantially within said housing, said hydrostatic transmission comprising a center section having hydraulic porting formed therein;
- a pump mounted on said center section and drivingly linked to said vehicle engine;
- and a motor mounted on said center section and hydraulically connected through said hydraulic porting to said pump, said motor being drivingly connected to said output shaft;
- a sump containing hydraulic fluid in flow communication with said hydrostatic transmission for supplying hydraulic fluid thereto;
- a porting plate disposed substantially adjacent to the external surface of said housing having internal porting formed therein in flow communication with said sump;
- and
- an auxiliary pump mounted to said porting plate in flow communication with said internal porting.
5 more elements
An apparatus for transmitting power from a vehicle engine to an output shaft, comprising:
- a housing having housing porting formed therein;
- a hydrostatic transmission disposed substantially within said housing, said hydrostatic transmission comprising a center section having hydraulic porting formed therein;
- a pump mounted on said center section and drivingly linked to said vehicle engine;
- and a motor mounted on said center section and hydraulically connected through said hydraulic porting to said pump, said motor being drivingly connected to said output shaft;
- a sump containing hydraulic fluid in flow communication with said hydrostatic transmission for supplying hydraulic fluid thereto;
- and
- an auxiliary pump mounted to the external surface of said housing in flow communication with said sump through said housing porting.
4 more elements
Dependencies are inferred from the claim text.