Swing check valve

• US 6,679,289 B2
• Filed: 10/01/2001
• Issued: 01/20/2004
• Est. Priority Date: 10/02/2000
• Status: Expired due to Term

• Current Assignee: Knappco Corporation (Dover Corporation)
• Original Assignee: Sure Seal, Inc.
• Inventors: Sisk, David E.
• Primary Examiner(s): Rivell, John
• Assistant Examiner(s): Krishnamurthy, Ramesh
• Application Number:
  US09/968,257
• Publication Number:
  US 20020078999A1
• Time in Patent Office: 841 Days
• Field of Search: 137/315.16, 137/315.33, 137/527, 137/527.2, 137/454.2, 137/454.5, 137/454.6
• US Class Current: 137/527.2
• CPC Class Codes: F16K 15/033 spring-loaded
• CPC Class Codes: F16K 27/0232 the valve member retained by a removable closure
• CPC Class Codes: Y10T 137/6028 Assembling or disassembling pivoted valve
• CPC Class Codes: Y10T 137/7504 Removable valve head and seat unit
• CPC Class Codes: Y10T 137/7898 Pivoted valves
• CPC Class Codes: Y10T 137/79 Head retained by removable closure

Abstract

The present invention relates to a light weight check valve for use in bulk material transfers that incorporates a smooth, generally spherical interior cavity to minimize flow inefficiencies. The check valve is made from two portions: a body portion and a lid assembly which is removably mounted to the body portion. The gate valve, or poppet, is hingedly mounted to the lid assembly. Hence, when the check valve assembly is opened for inspection, by removing the lid assembly, the poppet is removed along with the lid assembly, to allow for easy inspection of the poppet.

Claims

1. A check valve assembly including a valve body defining a chamber, an inlet port, an outlet port, and a poppet positioned in the cavity to be movable between a first position in which the poppet closes one of the ports to prevent the flow of flowable material through the valve assembly and a second position in which the poppet allows for the flow of flowable material through the valve assembly;

the valve body including;

a bottom portion having an open top;

the bottom portion defining a cavity defining a portion of a sphere; and

a lid assembly which closes the open top of the bottom portion;

the lid assembly defining a cavity defining a portion of a sphere;

the bottom and top portion cavities being formed by walls which, when the lid assembly is assembled to the bottom portion, defines a sphere, such that the valve chamber is substantially spherical in shape.

2. The check valve assembly of claim 1 wherein said lid assembly is removably connected to said bottom portion and said poppet is hingedly mounted to said lid assembly.

3. The check valve assembly of claim 1 wherein the poppet is biased to said first, closed position by a spring.

4. A check valve assembly including a housing defining a chamber and including an inlet port, an outlet port, and a poppet positioned in the chamber to be movable between a first position in which the poppet closes one of the ports to prevent the flow of flowable material through the valve assembly and a second position in which the poppet allows for the flow of flowable material through the valve assembly;

said housing comprising a base portion defining an opened cavity and a lid assembly removably mounted to said base portion which closes said opened cavity;

said poppet being hingedly mounted to said lid assembly;

whereby, when said lid is removed from said check valve assembly, said poppet is also removed from said check valve assembly;

said lid assembly also defines an open cavity, said cavities of both said base portion and said lid assembly defining a portion of a sphere, such that, when said lid assembly is placed on said body portion, said cavities, in combination, define said chamber, and said chamber is substantially spherical.

5. The check valve assembly of claim 4 wherein the poppet includes a circumferential groove and a seal being received in said groove.

6. The check valve assembly of claim 4 wherein the walls of the check valve chamber are made of a material which will substantially resist pitting.