US 5,007,458 AGranted

Poppet diaphragm valve

AssigneeParker-Hannifin Corporation

InventorsJerald J. Marcus, John F. Berninger

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Abstract

A solenoid actuated pneumatic valve (50) has a valve body (52). The valve includes an inlet (60), a first outlet (62) and a second outlet (64). The body has a first internal chamber (66) and a second internal chamber (68). The first and second chambers are connected through a first opening (80). The body also includes a third chamber (76) connected to the first chamber through a second fluid opening (84). A stem (88) extends through the first, second and third chambers and is coaxial with the first and second fluid openings. A first poppet diaphragm (112) is mounted on the stem in the second chamber. The poppet diaphragm includes a face (118) sized for blocking the first opening, and a convoluted web portion (120) which extends radially outward and attaches to the valve body. A second poppet diaphragm (130) is mounted on the stem in the third chamber. The second diaphragm has a face sized for blocking the fluid opening between the first and third chambers. An electric solenoid (108) moves the stem in response to changes in electrical condition. In a first condition, the first poppet diaphragm is disposed of the opening between the first and second chambers. Compressed air passes from the inlet to the first outlet while the second poppet diaphragm blocks the delivery of air to the second outlet. Changing the condition of the electric solenoid moves the stem so that the first poppet diaphragm blocks delivery of air to the first outlet and compressed air is directed to the second outlet.

Claims13

Dependent claims

A fluid valve for directing fluid flow therethrough, comprising:

a valve body;
said body including:
a first chamber;
first inlet means for introducing fluid into said first chamber;
a second chamber, said second chamber having a first side and an opposed second side;
first outlet means for delivering fluid from said first side of said second chamber;
first fluid passage means extending between said first and second chambers, said first fluid passage means including a first opening into said first side of said second chamber;
a stem mounted for axial movement on said valve body, said stem movable between a first position and a second position, said stem including a first reduced portion;
movement means for selectively moving said stem between said first and second positions;
a first poppet diaphragm mounted on said stem for movement therewith in said second chamber, said poppet diaphragm including:
a first resilient body portion, said first body portion including a first hole therethrough, said first reduced portion of said stem extending through said first hole, said first body portion adjacent said stem abutting said first reduced portion whereby said first body portion is fixed on said stem;
said first body portion further having a first face adjacent said first opening, said first face adapted for blocking said first opening when said stem is in the first position, and said first face disposed of said first opening when said stem is in the second position;
a flexible first web portion, said web portion extending outward of said first body portion to first peripheral portions, said first peripheral portions of said web engaging said valve body, said first poppet diaphragm maintaining said first side of said second chamber in fluid tight relation with said first opening and said first outlet means;
whereby movement of said stem between said first and second positions selectively places said first inlet and first outlet in fluid communication.

11 more elements

A fluid valve for selectively directing fluid flow from an inlet to a first outlet and alternatively to a second outlet, comprising:

a valve body,
said body including a first chamber in fluid communication with the inlet, a second chamber in fluid communication with the first outlet, and a third chamber in fluid communication with the second outlet;
said body further including a first aperture for passing fluid from said first chamber to said second chamber, said first aperture having a first sealing point diameter;
said body further including a second aperture for passing fluid from said first chamber to said third chamber, said second aperture having a second sealing point diameter;
a stem mounted for axial movement on said valve body said stem extending through said first and second apertures, said stem moveable between a first position and a second position;
movement means for selectively moving said stem between said first and second positions;
a first poppet diaphragm mounted on said stem for movement therewith in said second chamber, said first poppet diaphragm including a first resilient body portion and having a first face adapted for blocking said first aperture when said first face is adjacent said first aperture in the first portion of the stem;
said first poppet diaphragm further comprising a flexible first web portion extending radially outward from said first body portion to first peripheral portions, said first peripheral portions in fluid tight relation with said body, said web portion further including a first convoluted, half circular fold extending between said first body portion and said first peripheral portions, said first fold having a first circular centerline having a first centerline diameter, the first centerline diameter equal to said second sealing point diameter;
a second poppet diaphragm mounted on said stem for movement therewith in said third chamber, said second poppet diaphragm including a second resilient body portion and having a second face adapted for blocking said second aperture when said second face is adjacent the second aperture in the second portion of the stem;
said second poppet diaphragm further comprising a flexible second web portion extending radially outward from said second body portion to second peripheral portions, said second peripheral portions in fluid tight relation with said body, said second web portion further including a second convoluted, half circular fold extending between said second body portion and said second peripheral portions, said fold having a second circular centerline having a second centerline diameter, the second centerline diameter equal to said first sealing point diameter;
whereby movement of said stem between said first and second positions selectively places said inlet and said first outlet and second outlet alternatively in fluid communication.

8 more elements

Dependencies are inferred from the claim text.