Chisel Holder

Abstract

A chisel holder has an outer sleeve, a holding member, multiple positioning members, a resilient member, and a limiting ring. The outer sleeve has an assembling space, a receiving chamber, and an abutting rib. The receiving chamber is defined in the outer sleeve at a position adjacent to the top of the outer sleeve and is conical. The holding member is mounted in the outer sleeve and has a central hole, a limiting rib, and multiple holding holes. The positioning members are mounted respectively in the holding holes in the holding member, selectively extend into the central hole in the holding member, and abut an inner surface of the receiving chamber. The resilient member is mounted in the assembling space in the outer sleeve and abuts the bottom of the holding member.

What is claimed is: 
     
         1 . A chisel holder comprising:
 an outer sleeve having
 a top; 
 a bottom; 
 an assembling space defined in the bottom of the outer sleeve; 
 a receiving chamber defined in the outer sleeve at a position adjacent to the top of the outer sleeve, communicating with the assembling space, being conical, and having
 a top end being adjacent to the top of the outer sleeve and having an inner diameter; and 
 a bottom end being away from the top of the outer sleeve and having an inner diameter larger than the inner diameter of the top end of the receiving chamber; 
 
 an abutting rib formed on and protruding from an inner surface of the outer sleeve at a position of the bottom end of the receiving chamber; and 
 an annular groove defined in the inner surface of the outer sleeve at a position between the abutting rib and the bottom of the outer sleeve; 
   a holding member mounted in the outer sleeve, abutting the inner surface of the outer sleeve, and having
 a top extending out from the top of the outer sleeve; 
 a bottom; 
 a central hole axially defined through the holding member; 
 a limiting rib annularly formed around and protruding from the bottom of the holding member and having a top surface selectively abutting a bottom surface of the abutting rib; and 
 multiple holding holes radially defined in the holding member and communicating with the central hole of the holding member and the receiving chamber in the outer sleeve; 
   multiple positioning members mounted respectively in the holding holes in the holding member, selectively extending into the central hole in the holding member, and abutting an inner surface of the receiving chamber;   a resilient member mounted in the assembling space in the outer sleeve and abutting the bottom of the holding member; and   a limiting ring mounted in the annular groove in the outer sleeve and having a top surface abutting a bottom end of the resilient member.   
     
     
         2 . The chisel holder as claimed in  claim 1 , wherein each holding hole has
 an inner end communicating with the central hole of the holding member; and   an annular stopping rib formed inwardly on the inner end of the holding hole and selectively abutting a corresponding one of the positioning members.   
     
     
         3 . The chisel holder as claimed in  claim 2 , wherein the resilient member is a spring. 
     
     
         4 . The chisel holder as claimed in  claim 1 , wherein the resilient member is a spring.