Diaphragm valve structure

Details Diaphragm valve structure Diaphragm valve structure

1994-11-10

1996-06-11

Lee, Kevin

Valves and valve actuation

Reciprocating valve

Diaphragm

251359, F16K 717

Patent

active

055248659

ABSTRACT:
A diaphragm valve structure which is durable and has high reliability is obtained.
In the diaphragm valve structure, a body 11, a valve seat 12, a seat holder 13, and a diaphragm 14, are provided; an inflow passage and an outflow passage for fluids and openings thereof are formed in body 11, valve seat 12 is disposed around the periphery of the opening of the inflow passage, the valve seat is pressed downward into body 11 by seat holder 13, diaphragm 14 comes into contact with valve seat 12 and places the opening in an airtight state, and thereby, movement of fluid between the inflow passage and the outflow passage is halted. At least two projecting parts are formed between the inflow passage and the outflow passage of this diaphragm valve structure; one of these two projecting parts is formed on valve seat 12, and the other projecting part is formed either on valve seat 12 or on seat holder 13. By means of this structure, it is possible to maintain contact between diaphragm 14 and at least one projecting part, and it is possible to increase the reliability of the airtight state.

REFERENCES:
patent: 4304260 (1981-12-01), Turner et al.
patent: 4828219 (1989-05-01), Ohmi et al.
patent: 5253671 (1993-10-01), Kolenc

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