US 7,458,414 B2Granted

Hydraulic reservoir with integrated heat exchanger

AssigneeParker-Hannifin Corporation

InventorMatthew H. Simon

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Abstract

Improvement, in hydraulic systems, such as for vehicle transmissions and the like, in the form of a hydraulic reservoir with integrated heat exchanger having fluid supply/return and fluid return ports, including a central section, having inner and outer shell portions with a first gap therebetween, the outer shell being provided with a plurality of radially-spaced, external cooling fins, longitudinally-directed for the length of the central section; the ends of the latter being closed off via respective bottom and top cap portions, thereby defining a central fluid cavity, the top cap portion having spaced outer and inner cap portions, with a second gap therebetween, with a fluid inlet port, in the outer cap portion, directing incoming fluid from the second gap into and through the entire length of the first gap before entering the central fluid cavity, thereby maximizing heat transfer from the fluid via the plurality of cooling fins.

Claims22

Dependent claims

A hydraulic reservoir with integrated heat exchanger comprising:

a. a generally cylindrical central section having an inner cylindrical shell portion and a peripherally-spaced cylindrical outer shell portion, with a first annular gap therebetween, said outer shell portion being provided with a plurality of external cooling fins;
b. a bottom cap portion, closing said central section at a lower end portion thereof;
c. a top cap portion, closing said central section at an upper end portion thereof, having an outer cap portion and a spaced inner cap portion, with a second gap therebetween forming a direct continuation of said central section first gap, said outer cap portion including a fluid inlet port in communication with said second gap;
d. said central section, together with said top and bottom cap portions, defining an internal central fluid cavity containing pressurized fluid;
and
e. a fluid supply/return port and at least one fluid outlet port extending into said central fluid cavity;
f. wherein incoming fluid, into said fluid inlet port, flows from said second gap into and through the entire length of said first gap before entering said central fluid cavity, thereby maximizing heat transfer from said fluid via said plurality of external cooling fins.

4 more elements

In a hydraulic cooling circuit, a hydraulic reservoir with integrated heat exchanger, the latter comprising in combination:

a. a substantially cylindrical central section having an inner cylindrical shell portion and a peripherally-spaced outer cylindrical shell portion, with a first gap therebetween, said outer shell being provided with a plurality of radially-spaced, external cooling fins, said cooling fins being directed substantially along the entire length of said central section;
b. a curved bottom cap portion, closing said central section at a lower end portion thereof;
c. a curved top cap portion, closing said central section at an upper end portion thereof, having an outer cap portion and a spaced inner cap portion, with a second gap therebetween forming a direct continuation of said central section first gap;
d. said central section, together with said top and bottom cap portions, defining an internal central fluid cavity;
and
e. a fluid inlet port in said top cap portion, with a fluid supply/return port and at least one fluid outlet port extending into said central cavity;
f. wherein incoming fluid, into said fluid inlet port, flows from said second gap into and through said first gap before entering said central fluid cavity, thereby maximizing heat transfer, from said fluid therein, via said plurality of external cooling fins.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/113,947Filed 25 Apr 2005 · us provisional application
Priority: 22 Jul 2004
Published: US 2006/0016184 A126 Jan 2006
Granted: 2 Dec 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

F15B 1/26
Installations or systems with accumulators; Supply reservoir or sump assemblies: supply reservoir or sump assemblies
Y10S 60/912
Power plants: cooling means
Y10S 165/916
Heat exchange: oil cooler
F15B
Systems acting by means of fluids in general