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US 10,589,618 B1Granted
Cooling pump assembly and cooling system for utility vehicle
AssigneeHydro-Gear Limited Partnership
InventorsScott W. Keller, Donald Rousser
Life of this patent
Estimating the term…
Abstract
A coolant pump assembly having a combined hydraulic drive pump and a coolant circulating pump is disclosed herein, for use in connection with a utility vehicle, such as a ride-on or stand-on mower. Such a vehicle includes at least one combination pump assembly that utilizes a first fluid circuit to hydraulically drive a wheel of the vehicle and a second fluid circuit to cool one or more vehicle components.
Claims21
A pump assembly, comprising:
- a main housing having a first end and a second end;
- an end cap engaged to the second end of the main housing, wherein a first surface of the end cap and the main housing cooperate to form a main sump, the end cap comprising internal hydraulic porting;
- a main pump disposed on the end cap and in the main sump;
- a cooling pump housing disposed adjacent to a second surface of the end cap, opposite the first surface, and having a cooling pump disposed therein, wherein the cooling pump housing is hydraulically segregated from the main sump;
- at least one spacer structure disposed between the cooling pump housing and the second surface of the end cap, to maintain a physical separation space and to permit airflow between the cooling pump housing and the end cap;
- and
- an input shaft extending into the first end of the main housing and engaged to and driving the main pump, wherein the input shaft extends completely through the end cap and drives the cooling pump.
4 more elements
A pump assembly, comprising:
- a main housing having a first end and a second end;
- an end cap engaged to the second end of the main housing, wherein a first surface of the end cap and the main housing cooperate to form a main sump;
- an axial piston pump disposed in the main sump;
- a planetary gear reduction disposed in a gear housing mounted adjacent to a second surface of the end cap;
- an input shaft extending into the first end of the main housing and engaged to and driving the axial piston pump, wherein the input shaft extends completely through the end cap and is engaged to and drives the planetary gear reduction;
- an output shaft driven by the planetary gear reduction;
- a cooling pump housing disposed adjacent to the gear housing and having a cooling pump disposed therein, wherein the cooling pump housing is hydraulically segregated from the main sump, and the cooling pump is engaged to and driven by the output shaft;
- and
- at least one spacer structure disposed between the cooling pump housing and the gear housing, to maintain a physical separation space and to permit airflow between the cooling pump housing and the gear housing.
6 more elements
A pump assembly for use on a vehicle having a cooling circuit for cooling fluid, and a hydraulic motor connected to a hydraulic drive circuit for hydraulic fluid, the pump assembly comprising:
- an end cap engaged to a main pump housing, wherein a first surface of the end cap and the main pump housing cooperate to form a main sump, the end cap comprising internal hydraulic porting;
- a main pump disposed on the end cap and in the main sump, wherein the main pump may be connected to the hydraulic motor through the hydraulic drive circuit;
- a cooling pump housing disposed adjacent to a second surface of the end cap and having a cooling pump disposed therein, wherein the cooling pump housing is hydraulically segregated from the main sump and the cooling pump may be connected to the cooling circuit;
- a plurality of stand-offs disposed between the cooling pump housing and the second surface of the end cap, to maintain a physical separation space adjacent to the cooling pump housing and to permit airflow between the cooling pump housing and the end cap;
- and
- an input shaft extending into the main pump housing and engaged to and driving the main pump, wherein the input shaft extends completely through the end cap and drives the cooling pump.
3 more elements
Dependencies are inferred from the claim text.