Gun drill coolant bushing
AssigneeCBC Industries, Inc.
InventorsGary Tsui, Thomas Heimbigner
Life of this patent
Estimating the term…
Abstract
A lock collar for a drill bushing and a system for cooling a drill bit during a drilling operation are arranged so as to be incorporated into a single mechanism. The mechanism involves two assemblies, one being a locking liner embedded in a jig plate, and the other being a coolant directing assembly adapted to be mounted on a power-fed tool. There is coolant passage means in the coolant directing assembly which accepts coolant from an appropriate source and directs it through the first mentioned assembly to the cutting edge of the drill bit or other cutting tool while the cutting operation is taking place. By reverse rotation of the coolant directing assembly, that assembly can then be removed for subsequent engagement with another locking liner.
Claims13
A coolant handling device for a drill bushing for directing flow of a coolant toward the cutting edge of a rotating cutting tool, said device being in the nature of a portable coolant directing assembly comprising a portable body having releasable and reusable attachments means for engagement and rotation with a rotatable portion of a conventional portable power tool, a cylindrical bushing having a shank extending from said body, a sleeve means extending around and in rotatable engagement with said body, said shank having a counter bore for reception of a separately acting cutting tool, said shank having a free end adapted to extend outwardly of said body and a captive end within and in engagement with said body, said shank and said body having a rotatable engagement with said sleeve means, coolant directing passage means extending between the captive end of said shank and an outlet at the free end of said shank, said passage means extending obliquely inwardly toward the long axis of said counter bore for directing coolant toward the axis of said counter bore, an exterior coolant inlet in the sleeve, and interconnecting passage means in the sleeve and body extending between the exterior coolant inlet and the coolant directing passage means of said shank.
A coolant handling device for a portable electric drill for directing flow of a coolant toward the cutting edge of a rotating cutting tool, said device including a coolant directing assembly comprising a portable body and a cylindrical drill bushing having an shank extending from said body, said shank having a counter bore for reception of a cutting tool, said shank having a free end adapted to extend outwardly of said body and a captive conventional portable power tool, a cylindrical bushing having a shank extending from said body, a sleeve means extending around and in rotatable engagement with said body, said shank having a counter bore for reception of a separately acting cutting tool, said shank having a free end adapted to extend outwardly of said body and a captive end within and in engagement with said body, said shank and said body having a rotatable engagement with said sleeve means, coolant directing passage means extending between the captive end of said shank and an outlet at the free end of said shank, said passage means extending obliquely inwardly toward the long axis of said counter bore for directing coolant toward the axis of said counter bore, an exterior coolant inlet in the sleeve, and interconnecting passage means in the sleeve and body extending between the exterior coolant inlet and the coolant directing passage means of said shank.
A coolant handling device for a drill bushing adapted to direct flow of a coolant to the cutting edge of a rotating cutting tool, said device comprising a stationary subassembly in cooperation with a portable coolant directing assembly, rotationally engageable and releasable interlocking members respectively on said stationary subassembly and said coolant directing assembly, a shank extending from said coolant directing assembly and having a counter bore for reception of a cutting tool, said stationary subassembly having a guide bore therethrough for reception of said shank, said shank having a free end adapted to extend outwardly of said stationary subassembly and a captive end, said coolant directing assembly having coolant distributing passage means extending from an inlet in the captive end of said shank and an outlet at the free end of said shank for directing coolant endwardly and inwardly of said shank.
Dependencies are inferred from the claim text.