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Home Metal Working Check-valves

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 Check valves

Details
Inventors: Gaehwiler, Heinz U.;
Assignee: EMS-Inventa AG (CH)
Primary Examiner: Nilson; Robert G.
Assistant Examiner:
Attorney, Agent or Firm: Bierman and Muserlian

A diaphragm- and spring-less check valve for gaseous media comprising an inlet housing (41) having a sealing edge (51), an outlet housing (11) and a closure body (30) disposed in between the housings, which is guided so as to be axially (14) movable and capable of being impressed bilaterally in any desired position and/or state of the valve, wherein the closure body (30) is moveable exclusively on the basis of a differential pressure between inlet (41) and outlet housing (11) in the blocking position against the sealing edge (51) and in the through-put position the sealing edge (51).

DETAILED DESCRIPTION What is claimed is: 1.
A diaphragm-less and spring-less check valve for gaseous media comprising an inlet housing (41) having an elastic sealing edge (51), and outlet housing (11) and a funnel-form closure body (30) disposed in between the housings, which blocks the check valve by resting on the elastic sealing edge (51) and a tube end (32) of the funnel-form is closed which is guided so as to be axially (14) movable and capable of being subjected to pressure from both sides in any desired position and/or state of the valve, wherein the closure body (30) is moveable exclusively on the basis of a differential pressure between inlet (41) and outlet housing (11) in the closed position against the sealing edge (51) and in the through-put position away from the sealing edge.
2.
A check valve of claim 1 wherein the closure body (30) is guided axially.
3.
A check valve of claim 1 wherein a region of the closure body (30) for its guidance and a region of the closure body (30) for closing the check valve are independent of one another.
4.
A check valve of claim 1 wherein the closure body (30) is disposed in the outlet housing (11) (41).
5.
A check valve of claim 1 wherein the tube end (32) of the funnel-form is disposed on a pin (14).
6.
A check valve of claim 1 wherein the region next to the sealing edge (51) acts as a guide device of the flow.
7.
A check valve of claim 6 wherein a chamber (52) next to the sealing edge (51) deflects (57) a medium (62) by approximately 180.
degree.
flowing in this region in the direction of the inlet housing (41) before it flows past the sealing edge (51).
8.
A check valve of claim 7 wherein the chamber (52) is an annular depression or bead.
9.
A check valve of claim 6 wherein a medium (60) flowing in the direction of the outlet housing (11) can flow largely unhindered through chamber (52) out of the inlet housing (41).
10.
A check valve of claim 1 wherein the sealing edge (51) is an annular resting edge for the funnel-form portion (31).
11.
A check valve of claim 1 wherein the outer diameter of the free margin (37) of the funnel-form portion (31) is greater than the diameter of the sealing edge (51) acting as an annular resting edge


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