Method of manufacturing rotary valves

• US 3,271,845 A
• Filed: 01/23/1962
• Issued: 09/13/1966
• Est. Priority Date: 02/11/1961
• Status: Expired due to Term

• Current Assignee: Rudolf Breher
• Original Assignee: Rudolf Breher
• Inventors: RUDOLF BREHER
• Application Number:
  US04/168,105
• Time in Patent Office: 1,694 Days
• US Class Current: 29/890.127
• CPC Class Codes: B29C 2049/023 using inherent heat of the preform, i.e. 1 step blow moulding
• CPC Class Codes: B29C 45/14754 being in movable or releasable engagement with the coating, e.g. bearing assemblies
• CPC Class Codes: B29C 49/06 Injection blow-moulding
• CPC Class Codes: F16K 27/067 with spherical plugs
• CPC Class Codes: Y10T 137/0508 Ball valve or rotary ball valve
• CPC Class Codes: Y10T 137/6035 Rotary ball valve
• CPC Class Codes: Y10T 29/49417 including molding or casting

Claims

1. A METHOD OF MANUFACTURING A ROTARY VALVE HAVING A MOLDED HOUSING OF SYNTHETIC MATERIAL FORMED INTEGRALLY WITH CONNECTING BRANCHES AND A ROTARY MEMBER HAVING A SPINDLE ROTATABLY MOUNTED IN SAID HOUSING, COMPRISING THE STEPS FO PREFABRICATING A ROTARY MEMBER WITH A PASSAGE THERETHROUGH, PREFABRICATING SEALING RINGS OF PLASTIC MATERIAL, MOUNTING SAID ROTARY MEMBER AND SAID SEALING RINGS ON A CORE EXTENDING THROUGH AND BEYOND BOTH ENDS OF THE PASSAGE OF SAID ROTARY MEMBER WITH SAID SEALING RINGS TIGHTLY ENGAGING SAID ROTARY MEMBER, INSERTING SAID ROTARY MEMBER JOINTLY WITH SAID CORE AND SAID SEALING RINGS INTO A CONFINED SPACE OF AN INNER CONFIGURATION COMPLEMENTARY TO THE OUTER CONFIGURATION OF SAID HOUSING, SAID CORE BEING ADAPTED TO FORM PASSAGES FOR SAID CONNECTING BRANCHES, MOLDING SAID HOUSING WITHIN SAID CONFINED SPACE AROUND SAID ROTARY MEMBER AND AROUND SAID CORE AND SAID SEALING RINGS, AND REMOVING THE FINISHED PRODUCT FROM SAID CONFINED SPACE AND REMOVING SAID CORE FROM SAID ROTARY MEMBER, SAID HOUSING AND SAID SEALING RINGS AFTER SAID SYNTHETIC MATERIAL OF SAID HOUSING HAS SET.