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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||72/356 ; 72/354 ; 72/377|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 7 인용 특허 : 7|
The disclosed method features an automatic high production process of forming a socket wrench and other elongated hollow parts such as a nutdriver from a tubular metal workpiece. The method of making a nutdriver includes extruding a workpiece through a tapered female die to reduce both the inside and outside diameters at one end of the workpiece and along a predetermined portion of its length from that one end of the workpiece. A recess of non-circular cross section is formed at the other end of the workpiece. In the method of making a socket wrench, an ...
A method of forming a socket wrench and other elongated hollow parts, such as a nutdriver, from a workpiece of metallic tubing having a generally uniform circular transverse cross section and a generally uniform wall thickness, the method comprising the steps of elongating the workpiece by driving the workpiece into a die cavity means with a power operated punch to cold extrude a leading axial portion of the workpiece, the elongating step being effected to increase the length of the workpiece by reducing both the inside and outside diameters at one end o...