Method of molding a value with rotatable member

• US 3,907,959 A
• Filed: 11/08/1972
• Issued: 09/23/1975
• Est. Priority Date: 02/17/1971
• Status: Expired due to Term

• Current Assignee: Eugene H. Wise, Homer W. Galt
• Original Assignee: Eugene H. Wise, Homer W. Galt
• Inventors: Wise, Eugene H., Galt, Homer W.
• Primary Examiner(s): White, Robert F.
• Assistant Examiner(s): Lowe, James B.
• Application Number:
  US05/304,752
• Time in Patent Office: 1,049 Days
• Field of Search: 264/242,274
• US Class Current: 264/242
• CPC Class Codes: F16K 27/067 with spherical plugs

Abstract

A valve of the type wherein a valve member having a passageway therethrough is rotatably mounted within a valve body or housing having inlet and outlet passages. The valve body is provided with one or more raised portions on its interior surface which serve to firmly engage or bias the valve member when it is rotated to the closed position, thereby preventing leakage between the valve member and the body. In the manufacture of such a valve in accordance with the method of the present invention, the valve body is formed of a suitable plastic material and is molded about the valve member. The valve member is placed in the open position in the mold and is provided with one or more recessed portions on the outer surface thereof so that complementary raised portions are formed on the inner surface of the molded valve body which serve to firmly engage or bias the valve member when it is rotated to the closed position.

Claims

1. A METHOD OF FORMING A VALVE HAVING A VALVE MEMBER WITH A PASSAGEWAY THERETHROUGH ROTATABLY MOUNTED WITH A SUBSTANTIALLY RIGID PLASTIC VALVE BODY HAVING INLET AND OUTLET PASSAGES SAID METHOD COMPRISING THE STEPS OF:

FORMING A RECESSD PORTION ON THE OUTER SURFACE OF THE VALVE MEMBER, POSITIONING THE VALVE MEMBER IN THE OPEN POSITION WITHIN A MOLD CAVITY HAVING A CONFIGURATION COMPLEMENTARY WITH THE CONFIGURATION OF THE VALVE BODY, FORMING A SUBSTANTIALLY RIGID RAISED PORTION ON THE INNER SURFACE OF THE MOLDED VALVE BODY THAT IS COMPLEMENTARY WITH SAID RECESSES PORTION OF THE VALVE MEMBER BY INTRODUCING PLASTIC MATERIAL INTO SAID MOLD CAVITY TO MOLD THE VALVE BODY ABOUT THE VALVE MEMBER, SAID RECESSED PORTION AND RAISED PORTION BEING SHAPED AND POSITIONED SUCH THAT SAID VALVE MEMBER IS ROTATED FROM AN OPEN TO A CLOSED POSITIONED AND WHEN SAID VALVE MEMBER IS THEREAFTER ROTATED FROM THE OPEN POSITION TO A CLOSED POSITION, SAID RECESSED PORTION IS MOVED OUT OF ENGAGEMENT WITH SAID RAISED PORTION AND SAID RAISED PORTION IS IN TIGHT ENGAGEMENT WITH THE OUTER SURFACE OF THE VALVE MEMBER TO PREVENT LEAKAGE BETWEEN THE VALVE BODY AND THE VALVE MEMBER WHEN THE LATTER IS IN THE CLOSED POSITION, THE FORMING METHOD RESULTING IN A VALVE IN WHICH SAID

2. The method of claim 1 wherein said raised portion is formed adjacent to the inlet passage of the valve body so that it will serve to urge the valve member toward the portion of said valve body adjacent to the outlet passage when the valve member is moved to the closed position.

3. The method of claim 1 wherein said recessed portion formed on the outer surfacE of the valve member has an annular configuration.

4. The method of claim 3 wherein said recessed portion is a flat annular portion surrounding one end of the valve member passageway.

5. The method of claim 3 wherein said recessed portion is an annular groove formed adjacent to one end of the valve member passageway.

6. The method of claim 3 wherein said recessed portion is formed on the outer surface of said valve member adjacent to one end of said passageway, and further comprising the step of forming a second recessed portion on the outer surface of said valve member adjacent to the other end of said passageway, whereby complementary annular raised portions are formed on the inner surface of the molded valve body which serve to tightly engage the valve member when it is rotated to the closed position.