Pipe joints or couplings – With assembly means or feature – Particular tool-engaging means or with tool
Patent
1975-03-05
1976-11-30
Callaghan, Thomas F.
Pipe joints or couplings
With assembly means or feature
Particular tool-engaging means or with tool
285175, 285333, 285392, F16L 1500
Patent
active
039945162
ABSTRACT:
A threaded interconnect structure incorporating respective matching internal and external threaded portions of members to be threadedly interconnected, with the thread geometry defining a profile having contiguous straight-thread and tapered-thread sections. Sealing integrity and make-up length and sealing predictability of the threaded interconnection are improved over standard tapered-thread joints. Tapered sections have a taper in excess of standard taper-threaded profiles and comprise comparatively fewer threads, with the sealing action in the tapered section being mechanically aided by the straight-thread sections during make-up of the joint, and thereafter mechanically reinforced by the straight-thread sections. A tool chaser of new and novel design permits cutting straight-tapered profile transitions with maintenance of pitch and thread matching.
REFERENCES:
patent: 278230 (1883-05-01), Fairlamb
patent: 720578 (1903-02-01), Greenfield
patent: 1064546 (1913-06-01), Ryan
patent: 1973848 (1934-09-01), Duffy
patent: 2029846 (1936-02-01), Von Henke
patent: 2288684 (1942-07-01), Couty
patent: 2329198 (1943-09-01), Hattan et al.
patent: 3212547 (1965-10-01), McKay et al.
patent: 3778089 (1973-12-01), Fredd et al.
Callaghan Thomas F.
Kintzinger Warren H.
Otis Engineering Corporation
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