Patent ID: 7073989
Filing Date: 2006-07-11
Classification: B23B,Y10S,Y10T

Abstract:
1. A re-configurable bushing comprising: a housing extending lengthwise between opposed forward and rear ends and defining an internal cavity; a nose piece slidably disposed relative to said housing, wherein a forward portion of said nose piece is capable of extending through an opening defined by the forward end of said housing; a gas inlet in fluid communication with a rear portion of the internal cavity defined by said housing between a rear portion of said nose piece and the rear end of said housing; an end plate proximate the rear end of said housing and fixed in position relative to said housing; a mounting mechanism for releasably attaching said housing to a drill motor during operation thereof, said mounting mechanism also permitting said housing to be detached from the drill motor so as to access the rear portion of the internal cavity; and a spring removably disposed within the rear portion of the internal cavity and extending lengthwise between said end plate and said nose piece to bias the nose piece forwardly relative to said housing, wherein the bushing is re-configurable to permit said nose piece to be alternately actuated pneumatically by gas introduced into the rear portion of the internal cavity via said gas inlet and mechanically by said spring disposed in the rear portion of the internal cavity.