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US 5,630,442 AGranted
Tamper resistant construction for hydrant actuating nut
AssigneeMcGard, Inc.
InventorBradley J. Julicher
Life of this patent
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AssigneeMcGard, Inc.
InventorBradley J. Julicher
Estimating the term…
A tamper resistant construction for preventing unauthorized actuation of the hydrant nut of a fire hydrant by causing any lateral pounding or upward forces applied to the tamper resistant construction to be transmitted directly to the hydrant body cover of the fire hydrant including a packing nut threaded into the hydrant body cover proximate the hydrant nut, a hydrant nut actuating body located within the packing nut and mounted on the hydrant nut in turning relationship therewith, a groove in the packing nut, a plurality of studs extending between the hydrant nut actuating body and the groove in the packing nut, a shroud rotatably mounted on the hydrant nut actuating body in closely spaced relationship to a cap rotatably mounted on the hydrant nut actuating body, and a limited space between the cap and the shroud for receiving a special wrench.
In a fire hydrant having a hydrant body and a hydrant cover mounted on said hydrant body and a hydrant shaft having an upper portion with a valve-actuating polygonal nut positioned at said upper portion of said hydrant shaft and extending outwardly from said hydrant cover, a construction for rendering said nut tamper resistant against unauthorized actuation comprising a packing nut threaded into said hydrant cover proximate to said upper portion of said hydrant shaft, a hydrant nut actuating body, a recess in said hydrant nut actuating body for receiving said polygonal nut in turning relationship, a plurality of circumferentially spaced threaded openings in said hydrant nut actuating body, a plurality of threaded studs having inner and outer ends with said inner ends located in said threaded openings, at least one bore in said packing nut alignable with said spaced threaded openings, a circumferential groove in said packing nut for receiving said outer ends of said threaded studs for establishing a force-transmitting connection between said hydrant nut actuating body and said packing nut while permitting relative rotation between said hydrant nut actuating body and said packing nut whereby said hydrant nut actuating body can rotate relative to said packing nut while said valve actuating polygonal nut retains a turning relationship with said hydrant nut actuating body, a shroud positioned in encircling relationship to said packing nut and having a lower portion positioned proximate said hydrant cover, a first rotatable connection between said shroud and said hydrant nut actuating body for permitting free rotation of said shroud on said hydrant nut actuating body, a cap mounted on said hydrant nut actuating body proximate said shroud, and a second rotatable connection between said cap and said hydrant nut actuating body, said force-transmitting connection between said hydrant nut actuating body and said packing nut transmitting external forces applied to said cap and to said shroud to said hydrant body.
A construction for rendering a hydrant nut tamper resistant comprising a packing nut having upper and lower ends, a threaded end on said lower end of said packing nut, an internal circumferential groove in said packing nut, at least one radial accessing bore in said upper end of said packing nut in communication with said internal circumferential groove, a hydrant nut actuating body having upper and lower ends, a plurality of threaded radial bores in said lower end of said hydrant nut actuating body, an opening in said lower end of said hydrant nut actuating body for receiving a hydrant nut, a plurality of threaded studs in said threaded radial bores which are accessible through said accessing bore when each of said threaded radial bores are aligned therewith, said threaded studs occupying positions wherein they are both threaded in said radial threaded bores and extend into said internal circumferential groove to thereby establish a force-transmitting connection between said hydrant nut actuating body and said packing nut which permits relative rotation therebetween, a shroud rotatably mounted on said hydrant nut actuating body, and a cap rotatably mounted on said hydrant nut actuating body proximate said shroud, said force-transmitting connection between said hydrant nut actuating body and said packing nut transmitting external forces applied to said cap and to said shroud to said packing nut.
A tamper resistant construction for preventing unauthorized actuation of a fire hydrant comprising a packing nut, a hydrant nut actuating body having a portion located within said packing nut, a receiving recess in said hydrant nut actuating body for receiving hydrant nut, a groove in the packing nut, a plurality of studs extending between the hydrant nut actuating body and said groove in said packing nut to thereby establish a force-transmitting connection between said hydrant nut actuating body and said packing nut which permits relative rotation therebetween, at least one bore in said packing nut in communication with said groove and alignable with said studs, a shroud rotatably mounted on said hydrant nut actuating body, and a cap rotatably mounted on said hydrant nut actuating body proximate said shroud, said force-transmitting connection between said hydrant nut actuating body and said packing nut transmitting external forces applied to said cap and to said shroud to said packing nut.
Dependencies are inferred from the claim text.