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US 5,203,651 AGranted
Tapping attachments
AssigneeTapmatic Corporation
InventorAllan S. Johnson
Life of this patent
Estimating the term…
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AssigneeTapmatic Corporation
InventorAllan S. Johnson
Estimating the term…
A tapping attachment for driving a tapping spindle constructed to be adapted for both direct drive and reverse drive of the spindle. The drive of the spindle is by way of a resiliently mounted dog ring having rigid radially extending drive dogs, extending radially outwardly and inwardly from a drive ring. The driving dogs are rigid, having slanting sides to accommodate clutching engagement and disengagement. Clutching engagement and disengagement occur as a result of relative axial movement as between the attachment and the drive spindle. The drive spindle has a central bore in which is provided an insert member having an axial bore which is connected to a flexible tube within the bore of the spindle, which accommodates relative axial movement, the flexible tube communicating with a similar bore in a tap itself. These bores provide a channel for continuously supplying coolant to the machine and to the spindle itself. In high pressure coolant applications the invention provides a rigid conduit tube together with back pressure relief arrangements.
In coupling means for transmitting torque, in combination, a first rotating member, a second rotating member, said members being relatively movable axially, means for transmitting rotary drive from one member to the other, said means including an axially movable driving member positioned between said rotating members and including at least one dogging part, both of the rotating members having at least one clutching part engageable in engaging position in surface-to-surface contact with said at least one dogging part of the driving member whereby drive is transmitted through the driving member, said driving member having a plurality of dogging parts extending radially inwardly and outwardly for engagement with the clutching parts, said dogging parts having at least one slanted side surface for limiting the amount of axial movement required to move between engaging position and disengaged position.
In a tapping attachment for transmitting drive to a tap having, in combination, a first rotating member connectable to a source of rotational drive, a second rotating member axially aligned with said first rotating member, said members being relatively movable axially, means for transmitting rotary drive from one member to the other, said second member comprising a spindle member having means for carrying a tap having a bore for circulating a coolant to the tap, said bores being positionable and alignable for said purpose, means to accommodate relative movement between said spindle member and said first rotating member, said means to accommodate relative movement between said spindle member and said first rotating member including a flexible tubular member forming part of said bore in said spindle member whereby the first rotating member is movable relatively to the tap and providing for continuous transmission of coolant to the tap, and further including a rigid conduit member disposed within said flexible tubular member.
In a tapping attachment, coupling means for transmitting torque having, in combination, a first rotating member, a second axially aligned rotating spindle member for carrying a tap, said members being relatively movable with respect to one another between forward and reverse drive positions, means for transmitting rotary drive from one member to the other, said means including at least one driving member positioned between the members, the said spindle having a bore for conveying coolant from the upper end of the spindle to the tap and stretchable means within the spindle to accommodate relative axial movement between the first rotating member and the spindle, while conveying coolant to the tap, and a substantially rigid conduit member within said stretchable means, for carrying coolant to said tap.
Dependencies are inferred from the claim text.