US 4,858,938 A · Two piece collet with interlocking collet segments

Abstract

A collet head for securing to a collet body for machine tools has a plurality of spaced segments arranged in a circular configuration having spaced slots between each segment. Each segment has a front face, a rear face, an inside work gripping surface, an outer cam surface and left and right side faces. Each segment also has an extraction hole in the front face thereof for receiving extraction tool fingers. On the left and right side faces of each segment is a lock recess extending from the front face of the segment and extending rearwardly towards the rear face. The lock recess comprises an enlarged portion and a narrow portion. The narrow portion of the lock recess opens into the respective side face of the segment. Each of the lock recesses cooperates with the lock recess on the adjacent side face of the adjacent segment. A plurality of removable sealing spring means are provided and inserted into each of the spaced slots between each segment and into each of the cooperating pair of lock recesses, thus locking the segments together to form the collet head. The collet head at its rear face has means for securing the collet head to the collet body.

Claims12

Dependent claims

A collet head for being removably secured to a collet body to form a two piece collet, said collet head comprising:

(a) a plurality of segments arranged in a circular configuration forming spaced slots between said segments;
(b) each of said segments having a front face, a rear face, an inside work gripping surface, an outer cam surface and left and right side faces;
(c) said segments being arranged so that the left side face of each one of said segments lies adjacent to the right side face of its corresponding adjacent segment;
(d) each of said segments having on its left and right side faces a lock recess extending from said front face rearwardly towards said rear face;
(e) said lock recesses opening into the respective side faces of the respective segments;
(f) said left and said right lock recesses of adjacent segments forming cooperating pairs of lock recesses;
(g) a plurality of removable resilient sealing spring means having laterally extending lock ears;
(h) each one of said resilient sealing spring means inserted from said front face into each of said spaced slots with said lock ears projecting into each of said cooperating pair of lock recesses, thereby locking said segments together to form said collet head;
and
(i) means on the rear face of each of said segments for securing said collet head to said collet body.

7 more elements

A two piece collet, comprising:

(a) a collet head;
(b) said collet head including a plurality of segments arranged in a circular configuration forming spaced slots between said segments;
(c) each of said segments having a front face, a rear face, an inside work gripping surface, an outer cam surface and left and right side faces;
(d) said segments being arranged so that the left side face of each one of said segments lies adjacent to the right side face of its corresponding adjacent segment;
(e) each of said segments having on its left and right side faces a lock recess extending from said front face rearwardly towards said rear face;
(f) said lock recesses opening into the respective side faces of the respective segments;
(g) said left and said right lock recesses of adjacent segments forming cooperating pairs of lock recesses;
(h) said collet head including a plurality of removable sealing resilient spring means having lateral lock ears;
(i) each one of said resilient sealing spring means inserted from said front face into each of said spaced slots with said lock ears projecting into each of said cooperating pair of lock ears projecting into each of said cooperating pair of lock recesses, thereby locking said segments together to form said collet head;
(j) a tubular collet body having a longitudinal axis and a front face;
(k) said collet head having means for securing said collet head to said collet body;
and
(l) said collet body including means cooperating with said means on said collet head for securing said collet head to said collet body.

10 more elements

Dependencies are inferred from the claim text.

Two piece collet with interlocking collet segments

Life of this patent

Two piece collet with interlocking collet segments

Life of this patent

Abstract

Claims12