Repair key and method of closing cracks

• US 3,168,941 A
• Filed: 11/08/1961
• Issued: 02/09/1965
• Est. Priority Date: 11/08/1961
• Status: Expired due to Term

• Current Assignee: Arch F. Southard Jr
• Original Assignee: Arch F. Southard Jr
• Inventors: Southard, Arch F. Jr.
• Application Number:
  US04/151,094
• Time in Patent Office: 1,189 Days
• US Class Current: 52/514
• CPC Class Codes: B23P 6/04 Repairing fractures or cracked metal parts or products, e.g. castings
• CPC Class Codes: B23P 6/045 of turbine components, e.g. moving or stationary blades, rotors, etc.
• CPC Class Codes: Y10T 29/49735 Mechanically attaching preform with separate fastener

Claims

1. A CONNECTION FOR REPAIRING A CRACK IN A METAL MEMBER COMPRISING, A FIRST BORE FORMING A RECESSED SOCKET IN SAID METAL MEMBER ADJACENT ONE EDGE OF THE CRANK, A SECOND BORE DISPOSED IN SAID METAL MEMBER ADJACENT THE OPPOSITE EDGE OF THE CRANK WITH SAID SECOND BORE BEING OF GREATER DEPTH THAN SAID FIRST BORE AND INCLINED INWARDLY AWAY FROM THE CRACK, A RECESSED CHANNEL EXTENDING TRANSVERE OF THE CRACK AND INTERCONNECTING SAID FIRST AND SECOND BORES AND HAVING A BOTTOM WALL INCLINED DOWNWARDLY FROM SAID FIRST TO SAID SECOND BORE, A RIGID KEY MEMBER HAVING ENLARGED FIRST AND SECOND SUBSTANTIALLY SPHERICAL END PORTIONS JOINED BY A SHANK HAVING A WIDTH SUBSTANTIALLY THE SAME AS THE WIDTH OF SAID RECESSED CHANNEL, SAID FIRST SPHERICAL END PORTIONS DISPOSED IN SAID FIRST BORE, SAID SHANK DISPOSED IN SAID RECESSED CHANNEL AND SAID SECOND SPHERICAL END PORTION DISPOSED IN SAID SECOND BORE, AND LUG MEANS THREADEDLY ENGAGING SAID SECOND BORE AND ADAPTED TO MOVE SAID SECOND SPHERICAL END PORTION DOWNWARDLY IN SAID INCLINED BORE AWAY FROM SAID CRACK AND PIVOT SAID FIRST SPHERICAL PORTION IN THE SOCKET FORMED BY SAID FIRST BORE TO THEREBY DRAW TOGETHER THE METAL MEMBERS ON OPPOSITE SIDES OF THE CRACK.