Lubricator for equipment exposed to pressure

Details Lubricator for equipment exposed to pressure Lubricator for equipment exposed to pressure

2011-04-26

2011-04-26

Mansen, Michael R (Department: 3654)

Lubrication

Lubricators

Nipple or fitting

C137S540000

Reexamination Certificate

active

07931126

ABSTRACT:
A lubricator (1) includes a coaxial compartment (3) with a shaped seat (4) upon which a sliding shutter (5) consisting of a front shaped plug (6) and an intermediate stem (7) with a back beat (8) associated with a first stop pin (9), operates; in the rear threaded end (10) of the compartment (3) a security dowel (11) with a front beat (12) associated with a second stop pin (13), screws on. A counter spring (15) engages itself between pins (9) and (13). The stem (7) of the shutter and the dowel (11) present peripheral helical grooves (14, 14′) with a spiral developing in the opposite direction as to the threading (10) of the compartment (3) and the threading of the dowel (11) itself.

REFERENCES:
patent: 1353951 (1920-09-01), Frost
patent: 4977927 (1990-12-01), Hill
patent: 5096158 (1992-03-01), Burdick et al.
patent: 6206032 (2001-03-01), Hill
patent: 6675825 (2004-01-01), Reeves et al.
patent: 2008/0000724 (2008-01-01), Stlaske et al.

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