Adjustable hole cutting device
OwnerM. Budd Mittleman, Franklin E. Loewinventors
Life of this patent
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Abstract
A circle cutter includes a beam with a central arbor and a pair of tool holders concurrently oppositely adjustable along the beam and having a pair of vertically spaced longitudinal bores carrying screws for engaging cutting members. An extension member engages the tool holder outer face and is detachably attached by screws engaging bores in the extension member and those in the tool holder and used for securing a tool to the extension outer face. A threaded third bore is formed in the extension below the first pair permitting the vertical adjustment of the attached tool.
Claims8
A circle-cutting device comprising a longitudinally extending channel shaped beam including an upper cross web and opposite depending longitudinally extending legs, an arbor projecting centrally upwardly from said beam, a pair of similar tool holders longitudinally slidably engaged by said beam between said channel legs, each of said tool holders having an outwardly directed first face, means for oppositely adjusting said tool holders along the length of said beam symmetrical to the middle thereof, a pair of tool holder extensions having opposite inwardly and outwardly directed second and third faces respectively, a pair of cutting members, and means for detachably securing said tool holders to said holder extensions with respective pairs of said first and second faces in confronting engagement and said cutting members to said tool holder extension third faces.
A tool holder extension for use with a circle-cutting device including a beam carrying a tool holder adjustable along the length of the beam and having an outer tool engaging first face and a pair of threaded longitudinal bores vertically spaced a predetermined distance, said extension comprising a body member having an inside second face complementing said first face, a pair of longitudinal bores vertically spaced said predetermined distance and a tool engaging outer third face and a pair of screws traversing said extension bores and engagable with respective tool holder bores.
A circle-cutting device comprising a longitudinally extending horizontal beam, an arbor projecting upwardly from said beam, a tool, a tool holder mounted on said beam and adjustable along the length thereof and having an outwardly directed tool engaging first face, an extension member having inwardly and outwardly directed faces and means for separably connecting said extension member to said first face with said extension member inwardly directed face engaging said first face and said tool engaging said extension member outwardly directed face.
Dependencies are inferred from the claim text.