Pipes and tubular conduits – Combined
Patent
1977-12-01
1979-02-06
Aegerter, Richard E.
Pipes and tubular conduits
Combined
F16L 5500
Patent
active
041379462
ABSTRACT:
A lock screw arrangement for a lateral passage which intersects the longitudinal bore of a pressure vessel, wherein the lateral passage includes a first shoulder facing toward, a second shoulder facing away from the bore, includes a shaft for extending through the lateral passage with threads intermediate the inner and outer shaft ends. The inner shaft end is formed to provide a surface for engaging a member to retain it in the bore and an annular shoulder facing the first shoulder within the lateral passage. Packing abuts the second shoulder and surrounds the shaft. A nut is externally threaded for engaging with threads in the internal passage, and internal threads for engaging with the threads on the shaft whereby the nut may be engaged against the packing to seal between the passage and shaft.
Seal means are carried by the nut for engaging adjacent the outer shaft end to isolate the internal nut threads and shaft threads from the environment and from internal pressure in the vessel. The outer shaft end is provided with surface means whereby the shaft can be rotated to sealingly abut the annular shaft shoulder with the shoulder in the bore to seal off between the bore and passage so that the nut can be removed for replacing the packing in the presence of pressure in the vessel.
REFERENCES:
patent: 1511529 (1924-10-01), Standlee
patent: 1720346 (1929-07-01), Pew
patent: 2029202 (1936-01-01), Shepherd
patent: 2902302 (1959-09-01), Ackermann
patent: 3239247 (1966-03-01), Pickert
Aegerter Richard E.
Equipment Renewal Company
Footland L.
Hayden Jack W.
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