公开(公告)号：US3589226A

公开(公告)日：1971-06-29

申请号：US3589226D

申请日：1968-11-27

申请人： DAYTON PROGRESS CORP

发明人： SHADOWENS ROBERT L JR

IPC分类号： B21D28/34 ,  B26F1/14

CPC分类号： B21D28/34 ,  Y10T83/2166 ,  Y10T83/9461 ,  Y10T83/9476 ,  Y10T279/17761

摘要： A punch, punch retainer or like assembly characterized by a uniquely applied retainer element in the form of a coiled compression spring installed in a bore to apply a spring load to a component part. The spring has a differential diameter and is differentially wound. When inserted in a bore, a portion of the spring contacts the bore wall with an expanding pressure to per se yieldingly anchor the spring in place. A spring portion lends itself to a simple winding to facilitate introduction and removal of the spring. In certain applications the spring is permitted a self-adjusting action under the influence of impact and vibration forces.