Hydraulic unit with integral oil cooler
AssigneeParker-Hannifin Corporation
InventorsXingen Dong, Barun Acharya
Life of this patent
Estimating the term…
Abstract
A hydraulic unit including an integrated fluid cooler. The fluid cooler includes a flow-through type heat exchanger. The hydraulic unit can include a pump, a motor, or both a pump and a motor. The fluid cooler can be carried by a housing of the hydraulic unit and a fan for moving air through the fluid cooler and circulating air over at least a portion of the housing of the hydraulic unit can be interposed between the fluid cooler and the housing. The fluid cooler can also be configured to function as a fan shroud. Fluid from the hydraulic unit as well as fluid from other sources can be circulated through the fluid cooler.
Claims12
A hydraulic unit comprising:
- a hydraulic pump and/or motor having a housing;
- a fluid cooler including a flow-through heat exchanger spaced apart from the housing for cooling fluid associated with the hydraulic pump and/or motor;
- and
- a fan positioned to cause air to flow through the fluid cooler and pass over at least a portion of the housing;
- wherein the fluid cooler is carried by the housing;
- wherein the hydraulic unit is a hydrostatic transmission including both a hydraulic pump and a hydraulic motor.
A hydraulic unit as set forth in claim, 1, wherein the flow-through heat exchanger has opposite sides and a plurality of through apertures through which air can flow from one side to the other.
A hydraulic unit comprising:
- a hydraulic pump and/or motor having a housing;
- a fluid cooler including a flow-through heat exchanger spaced apart from the housing for cooling fluid associated with the hydraulic pump and/or motor;
- and
- a fan positioned to cause air to flow through the fluid cooler and pass over at least a portion of the housing;
- and
- a fan shroud including the fluid cooler;
- wherein the fluid cooler is interposed between the fan and the housing.
A lawn mower including a frame to which at least one drive wheel is mounted, and a hydraulic unit mounted to the frame and operatively drivingly coupled to the drive wheel, wherein the hydraulic unit includes
- a hydraulic pump and/or motor having a housing;
- a fluid cooler including a flow-through heat exchanger spaced apart from the housing for cooling fluid associated with the hydraulic pump and/or motor;
- and
- a fan positioned to cause air to flow through the fluid cooler and pass over at least a portion of the housing;
- and
- a fan shroud including the fluid cooler.
A hydraulic unit comprising:
- a hydraulic pump and/or motor having a housing;
- a fluid cooler including a flow-through heat exchanger spaced apart from the housing for cooling fluid associated with the hydraulic pump and/or motor;
- and
- a fan positioned to cause air to flow through the fluid cooler and pass over at least a portion of the housing;
- and
- a fan shroud including the fluid cooler, and further comprising at least one bracket for supporting the fluid cooler, the bracket extending between the housing and the fluid cooler.
Dependencies are inferred from the claim text.