Check valve

• US 4,223,697 A
• Filed: 07/31/1978
• Issued: 09/23/1980
• Est. Priority Date: 07/31/1978
• Status: Expired due to Term

• Current Assignee: JM Huber Corporation
• Original Assignee: JUDD Valve Company Incorporated
• Inventors: Pendleton, Jack G.
• Primary Examiner(s): Nilson, Robert G.
• Application Number:
  US05/929,648
• Time in Patent Office: 785 Days
• Field of Search: 137/516.29, 137/518, 137/521, 137/527, 137/527.2, 137/527.4, 137/527.6, 137/527.8, 251/298, 251/299, 251/303, 251/332, 251/357, 251/DIG. 1
• US Class Current: 137/527.8
• CPC Class Codes: F16K 15/03 with a hinged closure member or with a pivoted closure member
• CPC Class Codes: Y10S 251/90 Valves with o-rings
• CPC Class Codes: Y10T 137/7903 Weight biased

Abstract

A flow through check valve having a covered access port and a pivotal clapper member, the valve body and access port cover providing a recess to completely receive the clapper member out of the flow stream such that the clapper member never comes into contact with the access port cover. The clapper member is provided with a modified rabbet cut recess for receiving an O-ring therein which results in a reduction in weight, a reduction of manufacturing costs and ease of replacement of the O-ring.

Claims

1. In a check valve having a valve seat and a cooperating pivotally mounted clapper member, said clapper member having a closed surface area for contacting said valve seat, an improvement comprising:

a substantially V-shaped recess provided in the clapper member closed surface area and an O-ring disposed in said V-shaped recess the cross-sectional angle of said V-shaped recess being acute.

2. A check valve as set forth in claim 1 wherein the valve seat and clapper member closed surface area is annular in shape and wherein the substantially V-shaped recess comprises a rabbet cut around the outer periphery of said closed surface area, the wall of said rabbet cut making an acute angle with respect to the floor of the rabbet cut.

3. A check valve as set forth in claim 2 wherein the O-ring diameter is smaller than the diameter of the V-shaped recess whereby said O-ring is slightly stretched when installed in the V-shaped recess.

4. A flow-through check valve comprising:

(a) a valve body having aligned inlet and outlet ports;

(b) a valve seat interposed between the inlet and outlet ports, said valve seat being an annular surface;

(c) an access port provided in the valve body interposed between the inlet and outlet ports, an access port cover removably secured to the access port to provide access to the interior of the valve body;

(d) a clapper member pivotally secured to the valve body in the proximity of the valve seat, said clapper member comprising an annular member closing surface on one face thereof, a V-shaped rabbit-cut recess around the outer periphery of the closing surface, the inner wall of said rabbit-cut recess forming an acute angle with the floor of said recess for receiving an O-ring therein;

(e) a clapper receiving recess for completely receiving the clapper member out of the flow path in the open position;

(f) a stop member carried by the valve body separate from the access port cover to prevent the clapper from contacting any part of the access port cover; and

(g) an O-ring carried by the V-shaped rabbit-cut recess in the clapper member.