公开(公告)号：US06719303B2

公开(公告)日：2004-04-13

申请号：US10066237

申请日：2001-10-26

Applicant: John Thomas Stephens

Inventor： John Thomas Stephens

IPC: B23B3130

CPC classification number: B23B31/16179 ,  B23B31/16166 ,  Y10T279/1291 ,  Y10T279/17589 ,  Y10T279/17743

Abstract: A drill rod chuck in which the closing of the jaws is effected through the use of gas springs mounted in the slidable jaw actuating jaw bowl. Further the jaws are supported by bushings against cantilever loading during drilling and the jaws are positively advanced and retracted through slidable interengagement with the jaw bowl.

Abstract translation: 钻杆卡盘，其中通过使用安装在可滑动爪致动爪碗中的气弹簧来实现夹爪的关闭。 此外，在钻孔期间，钳口由衬套支撑在悬臂加载上，并且钳口通过与颚槽的可滑动相互接合而被正向推进和缩回。