Diaphragm operated fluid logic valves

Claim 2

A valve device, comprising: a. a housing having first and second cavity means therein; b. a first diaphragm dividing said first cavity means into a control pressure chamber and an atmospheric pressure chamber; c. a valve seat in said second cavity means; d. a valve in said second cavity means movable from a seated to an unseated position relative to said valve seat, and vice versa, and normally assuming one of said seated and unseated positions; e. a bore in said housing; f. reciprocably movable valve operator means in said bore and having one end disposed in said atmospheric chamber concentrically engaged with said diaphragm; and g. a Belleville spring in said atmospheric pressure chamber disposed to bias said valve operator means and said diaphragm to a limit position in a direction opposing pressure in said control pressure chamber; and the other end of said operator means disposed for movement in said second cavity means in response to pressure in said control pressure chamber overriding the bias of said Belleville spring to dispose said valve in the other of said seated and unseated positions.

Claim 3

A valve device, as recited in claim 1, in which: a. said housing is comprised of at least two housing sections, each having a face adjacent the other; b. each said face including a depression opposite the other which together comprise said first cavity means; and c. a resilient member extending between and fully across said two housing sections, with the outer peripheral portion thereof tightly disposed between and in sealed relationship with said faces, and with the integral inner portion thereof comprising said diaphragm.

Claim 4

A valve device, as recited in claim 1, in which: a. one end of said bore opens to said atmospheric chamber, and the other end thereof opens to said second cavity means through said valve seat; b. an inlet port in said second cavity means; c. a second diaphragm in said second cavity means and having a first and a second portion; d. said second diaphragm dividing said second cavity means into a third and fourth chamber; e. said first portion overlying said valve seat and comprising said valve; and f. said second portion having aperture means therethrough intercommunicating said third and said fourth chambers.

Claim 5

A valve device, comprising: a. a housing having a first cavity means and a second cavity means therein; b. a first diaphragm dividing said first cavity means into a control pressure chamber and an atmospheric pressure chamber; c. a second diaphragm dividing said second cavity means into a third chamber and a fourth chamber; d. a bore communicating said atmospheric chamber with said third chamber; e. valve operator means reciprocably movable in said bore with radial clearance, one end of said valve operator means disposed in said atmospheric pressure chamber in engagement with said first diaphragm, and having the other end thereof extensible into said third chamber to move said second diaphragm in response to pressurization of said control pressure chamber; f. valve seat means in said fourth chamber; g. an inlet port and an outlet port in said fourth chamber, one of which is surrounded by said valve seat; h. a valve in said fourth chamber movable from a first seated position to a second unseated position, and vice versa, relative to said valve seat in response to reciprocable movement of said valve operator means and said second diaphragm; i. said valve normally assuming one of said first and second positions when said fourth chamber is pressurized via said inlet port, and movable to the other of said first and second positions in response to movement of said valve operator means and said second diaphragm when said control pressure chamber is pressurized.

Claim 6

A valve device, comprising: a. a housing having a first cavity means and a second cavity means therein; b. a first diaphragm dividing said first cavity means into a control pressure chamber and an atmospheric pressure chamber; c. a second diaphragm dividing said second cavity means into a third chamber and a fourth chamber; d. a bore communicating said atmospheric chamber with said third chamber; e. valve operator means reciprocably movable in said bore with radial clearance, one end of said valve operator means disposed in said atmospheric pressure chamber in engagement with said first diaphragm, and having the other end thereof extensible into said third chamber to move said second diaphragm in response to pressurization of said control pressure chamber; f. valve seat means in said fourth chamber; g. an inlet port and an outlet port in said fourth chamber, one of which is surrounded by said valve seat; h. a valve in said fourth chamber movable from a first seated position to a second unseated position, and vice versa, relative to said valve seat in response to reciprocable movement of said valve operator means and said second diaphragm; i. said valve normally assuming one of said first and second positions when said fourth chamber is pressurized via said inlet port, and movable to the other of said first and second positions in response to movement of said valve operator means and said second diaphragm when said control pressure chamber is pressurized.

Claim 7

A valve device, as recited in claim 4, in which: a. said valve seat surrounds said inlet port; and b. said valve comprises a portion of said diaphragm.

Claim 8

A valve device, as recited in claim 1, in which a third diaphragm means divides said control pressure chamber into a first control pressure chamber and a second control pressure chamber, each operable when pressurized to dispose said valve operator means in said other position.

Claim 9

A valve device, as recited in claim 4, in which, a third diaphragm divides said control pressure chamber into a first and second pressure chamber, each operable when pressurized to dispose said operator means in said other position.

Claim 10

A valve device, as recited in claim 4, in which, a Belleville spring is disposed in said control pressure chamber biasing said valve operator means in a direction opposing pressure in said control pressure chamber.

Claim 11

A valve device, as recited in claim 4, in which: a. said second cavity means is comprised of a third and fourth cavity intercommunicated via a second bore; b. said second diaphragm divides said third cavity into said third and fourth chambers; c. an auxiliary valve operator carried by said second diaphragm includes a portion reciprocably movable with radial clearance in said second bore; d. said inlet is disposed in said fourth cavity; and e. the end of said second bore in said fourth cavity is surrounded by said valve seat.

Claim 12

A valve device, as recited in claim 8, in which: a. a third diaphragm divides said fourth cavity into fifth and sixth chambers; b. said third diaphragm having first and second portions; c. said first portion of said third diaphragm overlying said valve seat and comprising said valve; and d. said second portion of said third diaphragm having aperture means therethrough intercommunicating said fifth and sixth chambers.