US 7,914,241 B2 · Tapping tool

Abstract

A tapping tool having a guide body, a driver for longitudinal movement of a tap within the guide body, and a pump for lubricating the tap. A keyway in the outer body of guide body mates with an indexing key in a rotatable indexing holder of a turret press, which causes the guide body to rotate in sync with the turret press. A driver cylinder is centrally disposed in the guide body. The driver is adapted for sliding, mating engagement within the driver cylinder. A chamber in the lubrication pump holds the lubrication which is ejected by the pump onto the tap. Lubrication is ejected onto the tap through a normally closed ejector inlet that is opened by downward movement of a plunge pin against the lubrication in the chamber. The ejector is sized to restrict the flow of lubrication from the ejector outlet, which creates back pressure in the lubrication chamber. The back pressure forces a ball to close the lubrication conduit when the plunge pin moves downward.

Claims28

Dependent claims

A tapping tool comprising a guide body, a means for longitudinal movement of a tap within the guide body, and a means for lubricating the tap wherein:

the means for lubricating the tap comprises a lubrication pump;
the lubrication pump comprises a lubrication chamber, a means for filling the lubrication chamber with lubrication, and a means for pumping lubrication onto the tap;
and
the means for pumping lubrication onto the tap comprises an upper plunge pin, a head, a means for connecting the upper plunge pin to the head, a lower plunge pin in slidable engagement with the upper plunge pin, and an ejector proximal to the tap when it begins to tap.

1 more element

Dependencies are inferred from the claim text.

Tapping tool

Life of this patent

Tapping tool

Life of this patent

Abstract

Claims28