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A locking construction for addition to an existing valve having a valve body, a flange on the valve body, a valve member in the valve body, a valve stem coupled to the valve member and extending through the flange for moving the valve member between various positions, the locking construction includ

A locking construction for addition to an existing valve having a valve body, a flange on the valve body, a valve member in the valve body, a valve stem coupled to the valve member and extending through the flange for moving the valve member between various positions, the locking construction including a locking plate securely locked to the flange by bolts which can be removed only with a specialized kay, a plurality of tapped bores in the locking plate, an operating plate slidably mounted on the locking plate and keyed to the valve stem, bores in the operating plate for alignment with the tapped bores in the locking plate, and locking bolts extending through the bores in the operating plate and received in the tapped bores in the locking plate for locking the valve stem in position, the last-mentioned locking bolts capable of being manipulated only by a specialized key.

대표청구항 ▼

In a valve having a valve body, first and second portions in said valve body, a valve member in said first portion of said valve body, and a valve stem coupled to said valve member and extending through said second portion of said valve body for moving said valve member between various positions: a

In a valve having a valve body, first and second portions in said valve body, a valve member in said first portion of said valve body, and a valve stem coupled to said valve member and extending through said second portion of said valve body for moving said valve member between various positions: a lock structure for locking said valve member in at least one of said various positions comprising a first member, first means for securely attaching said first member in locked engagement to said second portion of said valve body, a second member, second means for securing said second member to said valve stem, and third means for locking said second member to said first member in at least said one of said various positions, said second portion of said valve body comprising a flange, said first means comprising key-operated bolt means extending between said flange and said first member, said third means comprising second key-operated bolt means extending between said second member and said first member, said first and second members having first and second surfaces, respectively, in abutting engagement when said third means locks said second member to said first member, said first member being a disc-like plate, a plurality of tapped apertures in said disc-like plate for selectively receiving said second key-operated bolt means for locking said valve member in a plurality of adjusted positions, said second member being a second disc-like plate which covers said tapped apertures in said disc-like plate, said second disc-like plate being of substantially the same cross sectional dimension as said disc-like plate, said plurality of tapped apertures comprising a plurality of pairs of tapped apertures with each tapped aperture of each of said pairs being diametrically opposite to the other of the tapped aperture of the same pair, said second key-operated bolt means extending through apertures in said second disc-like plate which are diametrically opposite to each other, and said tapped apertures in said disc-like plate and said apertures in said second disc-like plate lying on circumferences of the same size, whereby when said second disc-like plate is rotated to align said apertures therein with a selected pair of said tapped apertures in said disc-like plate and said second key-operated bolt means are passed through said apertures and are received in said tapped apertures in alignment therewith, said second disc-like plate and said valve stem and said valve member coupled thereto are locked in a selected position.