Method of forming a transition section for connecting a circular tube and a noncircular tube

• US 3,324,534 A
• Filed: 08/21/1964
• Issued: 06/13/1967
• Est. Priority Date: 08/21/1964
• Status: Expired due to Term

• Current Assignee: Joseph H. Spurk
• Original Assignee: Joseph H. Spurk
• Inventors: Spurk, Joseph H.
• Application Number:
  US04/391,344
• Time in Patent Office: 1,026 Days
• US Class Current: 29/890.15
• CPC Class Codes: F16L 25/14 Joints for pipes of different diameters or cross-section
• CPC Class Codes: F16L 55/00 Devices or appurtenances for use in, or in connection with, pipes or pipe systems the preceding groups and groups F16L57/00, F16L59/00 take precedence; repairing or joining pipes on or under water F16L1/26; nozzles B05B; cleaning of pipes B08B9/02; arrangements of draining devices for water main or service pipe systems E03B7/08; devices for preventing bursting of water pipes by freezing E03B7/10; draining devices for hydrants E03B9/14; for domestic plumbing installations E03C1/00; steam traps for draining of liquids from enclosures containing gases or vapours F16T; arrangements for sealing leaky tubes or conduits of heat-exchangers F28F11/00
• CPC Class Codes: Y10T 29/49446 Ferrule making or reforming
• CPC Class Codes: Y10T 29/49904 Assembling a subassembly, then assembling with a second subassembly
• CPC Class Codes: Y10T 29/49996 Successive distinct removal operations

Claims

1. THE METHOD OF FORMING A TRANSITION SECTION FOR CONNECTING TOGETHER A CIRCULAR TUBE AND A SYMMETRICAL NONCIRCULAR TUBE EACH HAVING THE SAME CROSS SECTIONAL AREA, COMPRISING THE STEPS OF FACING OFF THE PERIPHERY OF ONE END OF SAID CIRCULAR TUBE TO PROVIDE A SYMMETRICAL NONCIRCULAR TRUNCATED PYRAMID OF THE SAME CROSS SECTIONAL SHAPE AS SAID NONCIRCULAR TUBE, COUNTERBORING SAID END OF SAID CIRCULAR TUBE WITH A PLANE CURVE TO PROVIDE A PLURALITY OF EQUI-SPACED PROJECTIONS EACH HAVING AN INNER SURFACE COMPRISING A SEGMENT OF A SURFACE OF REVOLUTION AND ANGULARLY DISPOSED OUTER SURFACES COMPRISING THE CORNERS OF SAID PYRAMID, FLARING AN END OF SAID SYMMETRICAL NONCIRCULAR TUBE TO PROVIDE A HOLLOW SYMMETRICAL NONCIRCULAR TRUNCATED PYRAMIDAL BODY COMPLEMENTARY TO SAID PYRAMID, AND SECURING SAID PYRAMID AND PYRAMIDAL BODY TOGETHER IN NESTED COAXIAL RELATION WHEREBY TO PROVIDE A COMPOSITE TAPERING INNER SURFACE OF SAID TRANSISTION SECTION WHICH HAS A CONSTANT CROSS SECTIONAL AREA THROUGHOUT ITS LENGTH EQUAL TO THE CROSS SECTIONAL AREA OF EACH OF SAID TUBES.