초록 ▼

A pipe expanding tool comprising a cylindraceous member having a pipe of oppositely disposed openings and an outer collar; a conical-shaped stepped expander having segmental members including a top stepped portion receivable with the collar, an elastic member receivable in the top stepped portion fo

A pipe expanding tool comprising a cylindraceous member having a pipe of oppositely disposed openings and an outer collar; a conical-shaped stepped expander having segmental members including a top stepped portion receivable with the collar, an elastic member receivable in the top stepped portion for urging the segmental members together to close longitudinal slits therebetween; an axially movable spreader receivable within the expander for overcoming compression on the top stepped portion exerted by the elastic member to spread the segmental members away from each other; a plunger for movement of the segmental members transversely of a longitudinal axis of the plunger and spreader; and an arm bearing against the plunger to move the spreader into the expander for increasing the outer diameter thereof and for movement in an opposite direction out of the expander so that the elastic material urges the segmental members together to close longitudinal slits for decreasing the outer diameter of the expander.

대표청구항 ▼

A pipe expanding tool, comprising: a cylindraceous member having a hollow interior and longitudinal axis, a pair of oppositely disposed opening means axially aligned with said longitudinal axis, and outer collar means at one end of said cylindraceous member; a conical-shaped segmented stepped expand

A pipe expanding tool, comprising: a cylindraceous member having a hollow interior and longitudinal axis, a pair of oppositely disposed opening means axially aligned with said longitudinal axis, and outer collar means at one end of said cylindraceous member; a conical-shaped segmented stepped expander including at least two segmental members together forming a completed outer conical surface and defining a longitudinal slit between adjacent faces, said stepped expander including stepped portions having an increasing outer diameter increasing in a stepped direction with a diameter greater than the diameter of the other stepped portion, a top stepped portion receivable with said outer collar means, said segmental members together forming said segmented expander having a conical-shaped interior; elastic means receivable in means provided in said top stepped portion, receivable in said outer collar means for urging said segmental members together to close said longitudinal slits therebetween; axially movable spreader means receivable within said conical-shaped interior and said hollow interior having an axis coaxial with said longitudinal axis for overcoming compression on said top stepped portion by said elastic means holding said segmental members together for spreading said segmental members away from each other in a direction transverse to said longitudinal axis as said spreader means is moved orthogonally to said transverse direction along said longitudinal axis away from said collar means; plunger means receivable within said hollow interior of said cylindraceous member movable in a direction axially along said longitudinal axis and towards said collar means for movement of said spreader means longitudinally and said segmental members of said stepped expander transversely of said longitudinal axis; and handle means including a first handle fixedly connected with said cylindraceous member and a second handle including a movable arm movable relative to said first handle and movably associated with said plunger means for movement of said spreader means, said movable arm passing through said oppositely disposed opening means and bearing against said plunger means for movement thereof in a first direction along said longitudinal axis to cause said spreader means to move into said stepped segmental members for increasing the outer diameter thereof and in a second direction along said longitudinal axis for movement out of said stepped segmental members and to enable said elastic means to urge said segmental members together to close said longitudinal slits for decreasing the outer diameter o said stepped expander.