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US 4,278,372 AGranted
Adjustable boring bar mechanism
AssigneeFansteel Inc.
InventorMarvin M. Heisner
Life of this patent
Estimating the term…
Abstract
An adjustable multiple blade boring bar with diametrically disposed overlapping blade blocks, each adjustable in and out and a control cartridge having actuator pins movable in opposite directions in response to rotation of a differential screw, the pins being oriented in relation to slots on the blade block to move in a camming relationship to shift the blocks in and out. A differential screw associates the control cartridge and the boring bar to permit radial equalization of the blade block when installed initially or after sharpening.
Claims7
A boring bar comprising:
- (a) a body having a mounting end and a working end, said working end having a transverse slot for receiving slidable tool blocks, and having a cartridge recess axially spaced from but in communication with said slot and disposed at an angle to said slot,
- (b) a pair of elongate tool blocks slidable in said boring bar body slot in the direction of the longitudinal axis of said slot and having means to carry a cutting insert at one end, each of said blocks having a slot extending transversely of the longitudinal axis of the block,
- (c) a cartridge actuator in said cartridge recess comprising an elongate body having an elongate slot opening to said transverse slot in said body,
- (d) a pair of actuator pin slides in said cartridge slot having pins extending respectively into said transverse slots in said tool blocks, and
- (e) means movable to actuate said pin slides in equal and opposite directions to cause said tool blocks to move in equal and opposite directions in said transverse slot of said boring bar body.
2 more elements
Dependencies are inferred from the claim text.