US 4,398,662 A · Oil temperature regulator

Abstract

An oil temperature regulator having a by-pass first passage means through the regulator for the oil, a heat exchange second passage means separate from the first, a cooler for transfer of heat between the cooler and the heat exchange second passage means, a first valve movable to open and close a first port between said oil entrance and heat exchange second passage, a second valve downstream from the first valve movable to open and close a second port between the by-pass and heat exchange passages for directing oil away from said by-pass passage through said heat exchange second passage at a selected temperature, a third valve downstream from the second valve movable to open and close a third port between the by-pass first passage means and the oil exit and temperature responsive means at the entrance operable by the entering oil at a first temperature to open the normally closed first valve at this temperature and temperature responsive means operable by the exiting oil at a second temperature higher than said first temperature to open the normally closed second valve and close the normally open third valve at this second temperature.

Claims10

Dependent claims

An oil temperature regulator, comprising:

means providing an oil entrance to said regulator;
means providing an oil exit from said regulator;
by-pass first passage means through said regulator for said oil;
heat exchange second passage means separate from said first passage means;
a cooler in heat exchange relationship with said heat exchange second passage means for transfer of heat therebetween;
a first valve movable to open and close a first port between said oil entrance and said heat exchange second passage;
a second valve downstream from said first valve movable to open and close a second port between said by-pass first and heat exchange second passage means;
a third valve downstream from said second valve movable to open and close a third port between said by-pass first passage means and said oil exit;
first temperature responsive means at said entrance operable by said entering oil at a first temperature to open said normally closed first valve at said first temperature;
and
second temperature responsive means operable by said exiting oil at a second temperature higher than said first temperature to open said normally closed second valve and close said normally open third valve at said second temperature.

8 more elements

Dependencies are inferred from the claim text.

Oil temperature regulator

Life of this patent

Oil temperature regulator

Life of this patent

Abstract

Claims10