Spanner for a ball valve

Details Spanner for a ball valve Spanner for a ball valve

2005-09-06

2005-09-06

Keasel, Eric (Department: 3754)

Valves and valve actuation

With means for blocking or disabling actuator

Latch manipulator mounted on handle or stem

C251S207000

Reexamination Certificate

active

06938874

ABSTRACT:
A ball valve has a body, a stem engaging a ball closing component having a main flow hole and auxiliary flow holes, and a spanner having shaft body and a handle. The shaft body has a base with a seating hole and a latch with an elastic pressure element located slidably in the base. In the body there is a recess which accepts an end of the latch to retain the spanner in a position where flow is effected through the auxiliary flow holes and not the main flow hole. The shaft body is connected with the stem by a screw. A handle is connected to an upper end of the shaft body.

REFERENCES:
patent: 3148553 (1964-09-01), Carr
patent: 3648970 (1972-03-01), Hartmann et al.
patent: 3679170 (1972-07-01), Bernas et al.
patent: 4203572 (1980-05-01), Coffman
patent: 5183073 (1993-02-01), Roberts
patent: 5213308 (1993-05-01), Jeromson et al.
patent: 5285997 (1994-02-01), Chang
patent: 5772177 (1998-06-01), Holloway et al.
patent: 5944051 (1999-08-01), Johnson

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