Dual function thermal valve

Claim 2

A temperature actuated valving system comprising: a. first and second pressure operated devices; and b. a dual function thermal valve having first and second inlet and outlet ports, said first and second inlet ports connected to a source of pressure, said first outlet connected to said fIrst pressure device and said second outlet connected to said second pressure device, and a single thermal unit means within said valve communicating said first inlet with said first outlet at a first predetermined temperature and communicating said second inlet with said second outlet at a second predetermined temperature.

Claim 3

The system of claim 1 wherein said thermal valve includes a diaphragm positioned between said first inlet and outlet ports and said second inlet and outlet ports, a first and second valve seat for said first inlet and outlet and said second inlet and outlet respectively, and said thermal unit means operatively connected to said diaphragm to seat said diaphragm against said first seat at said first temperature and to seat said diaphragm against said second seat at said second temperature.

Claim 4

The system of claim 2 wherein said thermal valve further includes first, second, third and fourth openings communicating respectively with said first inlet and outlet and said second inlet and outlet ports respectively, said first opening communicating with said second opening when said diaphragm seats against said first valve seat and said third opening communicating with said fourth opening when said diaphragm is seated against said second seat.

Claim 5

A thermal actuated system for controlling vacuum accessories in a motor driven vehicle comprising: a first vacuum operated device controlling a first accessory and a second vacuum operated device controlling a second accessory; and a dual function thermal valve having first and second inlet and outlet ports therein, said first and second inlet ports connected to a source of vacuum, said first outlet connected to said first vacuum operated device, said second outlet connected to said second operated vacuum device, said thermal valve further having a switching hollow portion therein, first and second valve seats disposed at opposite ends of said hollow portion, passage means therein communicating said first inlet port with said first outlet port at said first valve seat and said second inlet port with said second outlet port at said second valve seat, seating means disposed within said hollow and movable from said first seat to said second seat, and thermal unit means engaging said seating means and transmitting movement to said seating means upon change in temperature.

Claim 6

A thermal actuated system for controlling vacuum accessories in a motor driven vehicle comprising: a first vacuum operated device controlling a first accessory and a second vacuum operated device controlling a second accessory; and a dual function thermal valve having first and second inlet and outlet ports therein, said first and second inlet ports connected to a source of vacuum, said first outlet connected to said first vacuum operated device, said second outlet connected to said second operated vacuum device, said thermal valve further having a switching hollow portion therein, first and second valve seats disposed at opposite ends of said hollow portion, passage means therein communicating said first inlet port with said first outlet port at said first valve seat and said second inlet port with said second outlet port at said second valve seat, seating means disposed within said hollow and movable from said first seat to said second seat, and thermal unit means engaging said seating means and transmitting movement to said seating means upon change in temperature.

Claim 7

The thermal actuated system of claim 4 wherein said first vacuum operated device comprises a vacuum motor and valve for controlling the flow of exhaust hydrocarbons into the fuel supply of the motor driven vehicle and said second vacuum operated device includes a three port thermal actuated switch having a first normally open port connected to a source of ported vacuum, a second normally closed port connected to a source of manifold vacuum and an outlet port connected to a spark advance mechanism for controlling the valve timing of the motor driven vehicle.

Claim 8

A dual function thermal valve comprising: a. a thermally responsive unit, b. a valve housing securing the thermally responsive unit to one end thereof, c. said valve housing having first, second and third contiguous hollow portions therein, and first and second inlet and outlet ports, said first outlet port communicating with said first hollow portion, said second outlet port communicating with said third hollow portion, first passageway means within said housing communicating said first inlet port with said second hollow portion, second passage means within said housing communicating said second inlet port with said second hollow portion; d. a first and second valve seat disposed at opposite ends of said second hollow portion; and e. seating means secured within said second hollow portion actuated by said thermally responsive unit to move from said first seat to said second seat upon increase in temperature.

Claim 9

A dual function thermal valve comprising: a. a thermally responsive unit, b. a valve housing securing the thermally responsive unit to one end thereof, c. said valve housing having first, second and third contiguous hollow portions therein, and first and second inlet and outlet ports, said first outlet port communicating with said first hollow portion, said second outlet port communicating with said third hollow portion, first passageway means within said housing communicating said first inlet port with said second hollow portion, second passage means within said housing communicating said second inlet port with said second hollow portion; d. a first and second valve seat disposed at opposite ends of said second hollow portion; and e. seating means secured within said second hollow portion actuated by said thermally responsive unit to move from said first seat to said second seat upon increase in temperature.

Claim 10

The dual function thermal valve of claim 6 wherein said valve further includes an overtravel mechanism comprising an open-ended, bEll-shaped housing disposed within said first hollow passage, a drive stud extending from one end of said bell housing to said diaphragm, piston means extending from said thermal unit to the opposite end of said bell housing and actuated thereby, and a spring compressed between said drive stud and said piston means.