Valve opening/closing handle lock mechanism

Details Valve opening/closing handle lock mechanism Valve opening/closing handle lock mechanism

2007-05-15

2007-05-15

Chambers, A. Michael (Department: 3753)

Fluid handling

With lock or seal

C137S382000, C070S179000, C070S180000

Reexamination Certificate

active

11019715

ABSTRACT:
A valve opening/closing handle lock mechanism provided in a valve having a manually operated valve opening/closing handle (1) is capable of maintaining the security of the valve by preventing the valve from being opened or closed by accident or with malicious intent after completion of a proper opening/closing operation of the valve by means of the handle (1). The handle lock mechanism comprises a locking cap (4) mounted on the handle (1). The locking cap (4) functions to prevent the handle (1) from being operated, extends from the handle (1) to a handle mount portion (3) of the valve so as to cover the corresponding portion of the valve with the locking cap (4), and is provided with: an opening (5) through which an end portion of the handle (1) passes outward; or, a longitudinal groove through which the end portion of the opening/closing handle (1) slidably passes outward.

REFERENCES:
patent: 209181 (1878-10-01), Miller
patent: 1003211 (1911-09-01), Shepard
patent: 1683649 (1928-09-01), Belote
patent: 4716922 (1988-01-01), Camp
patent: 5533891 (1996-07-01), Pearl, II et al.
patent: 6041813 (2000-03-01), Koch et al.

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