Patent ID: 7325436

Claim:
An expanding tool comprising: a housing including a handle extended therefrom for being held by a user, and including a passage formed therein, and including a rear portion and a front portion, an expanding device attached to said front portion of said housing and including a plurality of expanding segments for engaging with a pipe to be expanded, and movable radially and outwardly and inwardly relative to said housing to expand the pipe, said expanding device including a conical bore formed in said expanding segments, an expanding mandrel slidably engaged in said passage of said housing, and including a conically tapering end movable and engageable into said conical bore of said expanding segments of said expanding device for moving said expanding segments radially and outwardly relative to said housing to expand the pipe, said expanding mandrel including a groove and an oblong hole formed therein and communicating with each other, and an actuating lever including an upper portion engageable into said groove of said expanding mandrel and pivotally attached to said housing with a shaft, said shaft being relatively and slidably received in said oblong hole of said expanding mandrel for allowing said expanding mandrel to be moved relative to said housing and said actuating lever, said actuating lever including a first cam member located in front of said shaft for moving and forcing said conically tapering end of said expanding mandrel to engage into said conical bore of said expanding segments of said expanding device and for moving said expanding segments radially and outwardly to engage with and to expand the pipe, and said actuating lever including a second cam member located behind said shaft for moving and retracting said conically tapering end of said expanding mandrel rearwardly relative to said housing.