Fuel control system and pneumatically operated valve means therefor or the like

Claim 2

A pneumatically operated valve means comprising a housing means having an inlet separated from an outlet by a valve seat means, said valve seat means having a first valve seat leading to one of said inlet and said outlet and a second valve seat leading to the other of said inlet and said outlet, said first and second valve seats being fluidly interconnected together, pressure regulator means controlling said first valve seat so as to control the pressure of the fluid adapted to pass from said inlet to said outlet through said valve seats, said pressure regulator comprising a movable valve member for varying the degree of fluid flow through said first valve seat, said movable valve member being movable between said first and second valve seats, and pneumatically operated means controlling the opening and closing of said second valve seat so as to control the flow of the fluid adapted to pass from said inlet to said outlet through said valve seats.

Claim 3

A pneumatically operated valve means as set forth in claim 1 wherein said second valve seat is intermediate said inlet And said first valve seat.

Claim 4

A pneumatically operated valve means as set forth in claim 1 wherein said first and second valve seats are in axially aligned relation.

Claim 5

A pneumatically operated valve means as set forth in claim 1 wherein a flexible diaphragm is carried by said housing means and defines a chamber therewith, said flexible diaphragm defining said pneumatically operated means for opening and closing said second valve seat.

Claim 6

A pneumatically operated valve means as set forth in claim 4 wherein said flexible diaphragm carries a guide member that projects into said second valve seat to guide movement of said diaphragm relative to said second valve seat.

Claim 7

A pneumatically operated valve means as set forth in claim 4 wherein spring means is carried by said housing means and is operatively interconnected to said diaphragm to tend to urge said diaphragm to one of its opening and closing positions relative to said second valve seat.

Claim 8

A pneumatically operated valve means as set forth in claim 4 wherein said chamber is interconnected to the exterior of said housing means by a passage means formed in said housing means.

Claim 9

A pneumatically operated valve means as set forth in claim 7 wherein a restriction means is disposed in said passage means that leads to said chamber.

Claim 10

A pneumatically operated valve means as set forth in claim 1 wherein said pneumatically operated means is vacuum operated and comprises a flexible diaphragm carried by said housing means and defining a chamber therewith on one side of said diaphragm, said flexible diaphragm having the other side thereof for opening and closing said second valve seat with said other side being subjected to the pressure at said inlet and said outlet when said other side is closing said second valve seat.

Claim 11

A pneumatically operated valve means as set forth in claim 1 wherein said pressure regulator means has a flexible diaphragm operatively interconnected to said movable valve member for controlling movement of said valve member relative to said first valve seat.

Claim 12

In a fuel control system having a source of fuel, a burner means and a pneumatic source, the improvement comprising a pneumatically operated valve means having a housing means provided with an inlet separated from an outlet by a valve seat means, means interconnecting said fuel source to said inlet, means interconnecting said burner means to said outlet, said valve seat means having a first valve seat leading to one of said inlet and said outlet and a second valve seat leading to the other of said inlet and said outlet, said first and second valve seats being fluidly interconnected together, pressure regulator means controlling said first valve seat so as to control the pressure of the fuel passing from said inlet to said outlet through said valve seats, said pressure regulator comprising a movable valve member for varying the degree of fluid flow through said first valve seat, said movable valve member being movable between said first and second valve seats, pneumatically operated means controlling the opening and closing of said second valve seat to control the flow of the fuel passing from said inlet to said outlet through said valve seats, and control means for interconnecting said pneumatic source to said pneumatically operated means to actuate the same to open said second valve seat and to disconnect said pneumatic source from said pneumatically operated means to deactuate the same to close said second valve seat.

Claim 13

In a fuel control system having a source of fuel, a burner means and a pneumatic source, the improvement comprising a pneumatically operated valve means having a housing means provided with an inlet separated from an outlet by a valve seat means, means interconnecting said fuel source to said inlet, means interconnecting said burner means to said outlet, said valve seat means having a first valve seat leading to one of said inlet and said outlet and a second valve seat leading to the other of said inlet and said outlet, said first and second valve seats being fluidly interconnected together, pressure regulator means controlling said first valve seat so as to control the pressure of the fuel passing from said inlet to said outlet through said valve seats, said pressure regulator comprising a movable valve member for varying the degree of fluid flow through said first valve seat, said movable valve member being movable between said first and second valve seats, pneumatically operated means controlling the opening and closing of said second valve seat to control the flow of the fuel passing from said inlet to said outlet through said valve seats, and control means for interconnecting said pneumatic source to said pneumatically operated means to actuate the same to open said second valve seat and to disconnect said pneumatic source from said pneumatically operated means to deactuate the same to close said second valve seat.

Claim 14

In a fuel control system as set forth in claim 11, the further improvement wherein said second valve seat is intermediate said inlet and said first valve seat.

Claim 15

In a fuel control system as set forth in claim 11, the further improvement wherein said first and second valve seats are in axially aligned relation.

Claim 16

In a fuel control system as set forth in claim 11, the further improvement wherein a flexible diaphragm is carried by said housing means and defines a chamber therewith, said flexible diAphragm defining said pneumatically operated means for opening and closing said second valve seat, said control means being adapted to interconnect and disconnect said pneumatic source to and from said chamber.

Claim 17

In a fuel control system as set forth in claim 14, the further improvement wherein said flexible diaphragm carries a guide member that projects into said second valve seat to guide movement of said diaphragm relative to said second valve seat.

Claim 18

In a fuel control system as set forth in claim 14, the further improvement wherein spring means is carried by said housing means and is operatively interconnected to said diaphragm to tend to urge said diaphragm to one of its opening and closing positions relative to said second valve seat.

Claim 19

In a fuel control system as set forth in claim 14, the further improvement wherein said chamber is interconnected to the exterior of said housing means by a passage means formed in said housing means, said control means being interconnected to said passage means.

Claim 20

In a fuel control system as set forth in claim 17, the further improvement wherein a restriction means is disposed in said passage means that leads to said chamber.

Claim 21

In a fuel control system as set forth in claim 11, the further improvement wherein said pneumatically operated means is vacuum operated and comprises a flexible diaphragm carried by said housing means and defining a chamber therewith on one side of said diaphragm, said flexible diaphragm having the other side thereof for opening and closing said second valve seat with said other side being subjected to the pressure at said inlet and said outlet when said other side is closing said second valve seat.

Claim 22

In a fuel control system as set forth in claim 11, the further improvement wherein said pressure regulator means has a flexible diaphragm operatively interconnected to said movable valve member for controlling movement of said valve member relative to said first valve seat.