Title: Tamperproof hydrant lock with controlled shock absorber

Abstract: A tamperproof hydrant lock with a controlled shock absorber. Power transmitting means are mounted on an operating rod extending within a chamber in the hydrant housing. A spring is mounted between the power transmitting means and the hydrant housing. First and second hydraulic means operatively associated with the power transmitting means control gradual opening and closing of the hydrant valve over first and second delay intervals of time respectively.

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Inventors: Byrnes, Francis R. (Philadelphia, PA, US)

Application Number: 829415
Filing Date: 1977-08-31
Publication_date: 1979-02-13
Assignee: Center Compression Lock Company, Inc. (Philadelphia, PA)
Primary Class(es): 137/296 137/382.5, 251/54, 251/291
Other Classes:
US Patent Ref:

3147827	Sep, 1964	Weisheit	251/54.
3532109	Oct, 1970	Smith	137/296.

Other Refs:
Primary Examiner: Michalsky, Gerald A.
Assistant Examiner:
Attorney: Seidel, Gonda & Goldhammer