Fluid handling – With lock or seal – Locks against rotary motion
Reexamination Certificate
2006-02-07
2006-02-07
Chambers, A. Michael (Department: 3753)
Fluid handling
With lock or seal
Locks against rotary motion
C137S382000, C070S178000, C070S180000, C070S186000
Reexamination Certificate
active
06994106
ABSTRACT:
A locking device to inhibit unauthorized operation of a fire hydrant includes a locking plug having a bottom opening that fits over an actuating nut of the hydrant. The locking plug has a cylindrically-shaped body formed with an upper actuator nut. A peripheral groove in a sidewall of the plug body is located above a set of inward extending, threaded bores for set screws to affix the locking plug to the hydrant actuating nut. Fitting over the plug is a cap having a passageway that intersects tangentially with the plug groove. A locking pin on a hasp bracket then is inserted into the cap passageway to form an interference fit with the plug groove. Rotating the bracket upward positions a staple post on the cap in a slot in the hasp bracket. A padlock then secures the position of the hasp bracket to inhibit access to the plug actuator nut and operatively connected hydrant actuating nut.
REFERENCES:
patent: 1830667 (1931-11-01), Lolley
patent: 1993784 (1935-03-01), Henderson
patent: 4936636 (1990-06-01), Matsuda
patent: 5469724 (1995-11-01), Pollard
patent: 6691732 (2004-02-01), Fleury et al.
patent: 6920894 (2005-07-01), Nickeas et al.
Embry King C.
Hackley Charles L.
Weiland Gerald J.
Chambers A. Michael
Plasticsworks, Inc.
Schmitt John L.
Utility Supply of America, Inc.
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