1975-02-28
1976-08-03
Peshock, Robert
A61C 1902
Patent
active
039721205
ABSTRACT:
In a preferred embodiment, a base structure affording upright support for a substantially horizontally mounted tray providing for movement of the tray slidably forwardly and backwardly intermittently optionally to desired degrees, and providing for forward and backward slant and for slant in either direction intermittently to desired degrees optionally, the tray having an upper surface defining a plurality of parallel grooves open at the forward ends thereof with the forward opening structure of at least one of the grooves defining a constriction in the groove and thereafter a forward widening thereof terminating as an abrupt step, and there being a mechanized tool of dentistry attached to a tubular connector having a forward end defining a downward projection such that the downward projection engages the step when the tubular connector is in a withdrawn state and there being an outer casing having a spiral ridge on the outer surface thereof mounted slidably over a portion of the tubular connector and defining a forward projection downwardly for engagement with the step, the width of the constriction being less than a diameter of the outer casing such that the forward end of the tubular outer casing is angled forwardly downwardly in the enlarged forward portion of the slot thereby facilitating the retained engagement of the downward projection of the outer casing with the step, such that during a dentist's use of the mechanized dental instrument the engaged projection of the outer casing with the step prevents rearward pulling pressure on the dental instrument during manual movements of and working with the dental instrument by the dentist.
REFERENCES:
patent: 2214774 (1940-09-01), Pieper
patent: 3217412 (1965-11-01), Pascente
patent: 3518763 (1970-07-01), Weiss et al.
patent: 3530513 (1970-09-01), Maurer et al.
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