SELF-CLOSING VALVE

• US 3,586,018 A
• Filed: 02/24/1969
• Issued: 06/22/1971
• Est. Priority Date: 02/24/1969
• Status: Expired due to Term

• Current Assignee: Bogardh Sven-Eric, Sven V. Nordquist
• Original Assignee: Bogardh Sven-Eric, Sven V. Nordquist
• Inventors: BOGARDH SVEN-ERIC, Nordquist, Sven V.
• Application Number:
  US04/801,603
• Time in Patent Office: 848 Days
• US Class Current: 137/67
• CPC Class Codes: F16K 31/001 actuated by volume variations caused by an element soluble in a fluid or swelling in contact with a fluid life-boats B63C9/24
• CPC Class Codes: Y10T 137/1624 Destructible or deformable element controlled

Abstract

A self-closing valve is disclosed wherein the valve body is temporarily prevented from closing by an obstacle that is slowly removed by the fluid flowing through the valve. Said obstacle may consist of a dissolvable plug that is placed in a chamber into which an extension of the valve body reaches so as to rest against said plug. Said chamber has an easily removable cap enabling convenient replacement of such plugs. The dissolvable substance may also consist of a powder filling in a perforated sleeve. The liquid flow past the dissolvable substance may be changed in order to vary the retardment of the closure of the valve.

Claims

1. A valve with delayed automatic closure comprising a valve housing having first and second chambers, said first chamber having an inlet for a fluid, said second chamber having an outlet for said fluid and a tubular extension closed by a removable cap, said first and second chambers being separated from each other by a wAll having an aperture which forms a valve seat, a valve body being situated in said first chamber, said valve body being mounted on an extension which projects through said aperture and into said second chamber and having an enlarged section on the end of the extension in said second chamber, apertured sleeve means cooperating with said enlarged section and defining therewith an apertured cylindrical chamber situated within said second chamber and on the opposite side of said enlarged section from said valve seat aperture for retaining material dissolvable in said fluid, said apertured sleeve means being attached to said removable cap, said extension with enlarged end and valve body being movable in a coaxial direction with respect to the axis of said apertured cylindrical chamber whereby the extension with enlarged end and valve body is supported by the dissolvable material in said apertured cylindrical chamber and as the dissolvable material disintegrates, the extension with enlarged end and valve body moves in said axial direction such that the valve body ultimately seats on said valve seat.

2. A valve as claimed in claim 1 wherein the enlarged end on said extension is perforated.

3. A valve as claimed in claim 1 wherein the enlarged end on said extension is of a smaller diameter than the inner diameter of said apertured sleeve means.

4. A valve as claimed in claim 1 wherein the apertured sleeve means and removable cap are rotatable by manual operation, the opposite end of said sleeve means with respect to said removable cap being situated close to the valve seat aperture and the apertures of said apertured sleeve means being so shaped to direct the flow of liquid through the second chamber differently depending upon the angular position of said cap and sleeve means.

5. A valve as claimed in claim 4 wherein the apertured sleeve means has a central inlet close to the valve seat aperture and an outlet.

6. A valve as claimed in claim 1 wherein the removable cap telescopes over said tubular extension.

7. A valve as claimed in claim 6 wherein the overlap of the telescoping members is the same length as the maximum movement of said extension.