Tube fitting

• US 3,290,069 A
• Filed: 09/03/1964
• Issued: 12/06/1966
• Est. Priority Date: 09/03/1964
• Status: Expired due to Term

• Current Assignee: Imperial Clevite Incorporated
• Original Assignee: Robert F. Davis
• Inventors: Davis, Robert F.
• Application Number:
  US04/394,262
• Time in Patent Office: 824 Days
• US Class Current: 285/341
• CPC Class Codes: F16L 19/10 the profile of the ring being altered

Claims

1. A FITTING FOR USE WITH STRAIGHT-ENDED TUBING, COMPRISING:

A BODY MEMBER HAVING AN INNER END, A BORE HAVING AN OPENING THROUGH SAID INNER END, AN ANNULAR TUBE STOP ON SAID INNER END CONCENTRICALLY ABOUT SAID BORE OPENING, AND AN AXIALLY INWARDLY WIDENING ANNULAR FIRST CAM SURFACE CONCENTRICALLY ABOUT SAID BORE OPENING, RADIALLY OUTWARDLY OF SAID TUBE STOP;

A NUT MEMBER HAVING A BORE DEFINING A SECOND CAM SURFACE INCLUDING AN AXIALLY OUTER, AXIALLY INWARDLY NARROWING FRUSTO-CONICAL PORTION AND A CONTIGUOUS AXIALLY INNER CYLINDRICAL PORTION;

COOPERATING MEANS ON SAID BODY MEMBER AND NUT MEMBER FOR FORCIBLY ADVANCING SAID SECOND CAM SURFACE TOWARD SAID INNER END OF THE BODY MEMBER;

AND AN ANNULAR SLEEVE MEMBER HAVING AN AXIALLY OUTER PORTION, A MID-PORTION, AN AXIALLY INNER PORTION, AND AN AXIAL BORE THERETHROUGH, SAID AXILLY INNER PORTION, AND AN THE SLEEVE MEMBER INCLUDING A RADIALLY OUTER, INWARDLY WIDENING THIRD CAM SURFACE FOR ENGAGEMENT WITH SAID FIRST CAM SURFACE OF THE BODY TO CONSTRICT SAID AXIALLY OUTER PORTION OF THE SLEEVE MEMBER RADIALLY INWARDLY AS A RESULT OF ADVANCEMENT OF THE SLEEVE MEMBER TOWARD SAID INNER END OF THE BODY AND AND INNER CYLINDRICAL SURFACE ARRANGED TO HAVE FACIAL ENGAGEMENT WITH THE TUBE AS A RESULT OF CONSTRICTION OF SAID AXIALLY OUTER PORTION OF THE SLEEVE MEMBER BY SAID FIRST CAM SURFACE, SAID AXIALLY OUTER PORTION FURTHER INCLUDING AN AXIALLY OUTER, RADIALLY INNER ANNULAR RECESS DEFINING AN ANNULAR, SHARP EDGE FOR BITTING INTO THE WALL OF A TUBE END EXTENDING COAXIALLY THROUGH SAID NUT MEMBER AND SLEEVE MEMBER BORES INTO ENGAGEMENT WITH SAID TUBE STOP OF THE BODY MEMBER, SAID MID-PORTION OF THE SLEEVE MEMBER INCLUDING A RADIALLY INNER, AXIALLY INWARDLY NARROWING ANNULAR SURFACE PROVIDED WITH RADIALLY INWARDLY PROJECTING MEANS FOR BITING INTO THE WALL OF THE TUBE END, SAID MID-PORTION FURTHER INCLUDING A RADIALLY OUTER, AXIALLY INWARDLY NARROWING FOURTH CAM SURFACE FOR ENGAGEMENT WITH SAID SECOND CAM SURFACE OF THE NUT MEMBER TO CONSTRICT SAID MID-PORTION AND AXIALLY INNER PORTION OF THE SLEEVE MEMBER RADIALLY INWARDLY AS A RESULT OF ADVANCEMENT OF THE NUT MEMBER TOWARD SAID INNER END OF THE BODY MEMBER, AND SAID AXIALLY INNER PORTION OF THE SLEEVE MEMBER INCLUDING A RADIALLY INNER, CYLINDRICAL SURFACE FOR FACIAL ENGAGEMENT WITH THE TUBE, AN AXIALLY OUTER RAIDAL SURFACE INTERSECTING SAID CYLINDRICAL SURFACE AND DEFINING THEREWITH A SHARP EDGE FOR BITING INTO THE WALL OF THE TUBE END, AND A RADIALLY OUTER, AXIALLY INWARDLY NARROWING FIFTH CAM SURFACE COMPRISING AN EXTENSION OF SAID FOURTH CAM SURFACE FOR ENGAGEMENT WITH SAID SECOND CAM SURFACE OF THE NUT MEMBER TO CONSTRICT SAID AXIALLY INNER PORTION OF THE NUT MEMBER RADIALLY INWARDLY AS A RESULT OF THE ADVANCEMENT OF THE NUT MEMBER TOWARD SAID INNER END OF THE BODY MEMBER.