초록 ▼

An improved tubing expansion apparatus is disclosed which greatly facilitates convenient expansion of tubing, such as for repair and replacement of motor vehicle exhaust systems. The apparatus includes a hand-holdable expander unit and a separate pressurized fluid supply unit joined in fluid communi

An improved tubing expansion apparatus is disclosed which greatly facilitates convenient expansion of tubing, such as for repair and replacement of motor vehicle exhaust systems. The apparatus includes a hand-holdable expander unit and a separate pressurized fluid supply unit joined in fluid communication with the expander unit by a flexible fluid conduit. In order to provide selective control of the fluid supply unit from the expander unit, a trigger-like electrical switch is provided on the expander unit to permit remote operation of the fluid supply unit. Other features of the apparatus enhance its versatility for conveniently effecting varying degrees of expansion on tubing of different dimensions.

대표청구항 ▼

An apparatus for expanding tubing, comprising: an expander unit including single-acting fluid-operated motor means, and outwardly movable, expansion jaw means operable by operation of said motor means in a first direction to effect expansion of tubing, said expander unit including biasing means for

An apparatus for expanding tubing, comprising: an expander unit including single-acting fluid-operated motor means, and outwardly movable, expansion jaw means operable by operation of said motor means in a first direction to effect expansion of tubing, said expander unit including biasing means for effecting movement of said motor means in a second direction opposite said first direction; a pressurized fluid supply unit for providing a source of pressurized fluid; conduit means joining in fluid communication said expander unit and said fluid supply unit for providing said motor means with pressurized fluid; and electrical switch means associated with said expander unit for remotely operating said fluid supply unit; said fluid supply unit comprising electrically powered fluid pump means adapted for continuous operation, and solenoid-operated valve means operatively connected with said electrical switch means for controlling the supply of pressurized fluid to said expander unit from said pump means via said conduit means, whereby actuation of said solenoid-operated valve means effects supply of pressurized fluid from said continuously operating pump means to said single-acting motor means of said expander unit for effecting tubing expansion, said biasing means effecting movement of said motor means in said second direction upon completion of tubing expansion.