Patent ID: 7406769

Claim:
An electric pipe-cutting apparatus comprising: a) a rotating cutting head comprising: a semi-circular beveled cutting ring gear assembly having at least one side geared to form a ring gear to receive a pinion gear to rotatively drive said cutting head and having an interior radius substantially similar to that of a conventional piece of pipe; a semi-circular beveled support ring gear assembly having at least one side geared to receive a pinion gear to rotatively drive said cutting head with one end pivotally connected to said cutting ring gear assembly and having an interior radius substantially similar to that of a conventional piece of pipe thereby forming a throughbore sized slightly larger than said pipe when closed against said cutting ring gear assembly; and a cutting wheel rotatively disposed between said cutting ring gear assembly and said support ring gear assembly with a portion thereof extending radially into said throughbore; b) means for retaining said cutting wheel around the circumference of a pipe; c) means for driving said cutting wheel rotatively around said pipe thereby enabling said cutting wheel to circumferentially penetrate and cut said pipe; d) said means for driving said cutting wheel is a power pack comprising: a substantially columnar housing member; a geared drive assembly having at least one pinion gear to be rotatively engaged with a ring gear of said cutting head and having at least one drive shaft; a motor to rotate said drive shaft; at least one battery to power said motor; a power switch to selectively supply power to said motor to initiate and terminate the operation thereof; and e) said drive assembly comprising: a primary drive shaft rotatively driven by said motor; a primary pinion gear disposed on the distal end of said drive shaft for engagement with said first ring gear of said cutting head; a bevel connection shaft perpendicular to a medial portion of said primary drive shaft; a primary bevel gear connection in communication with said primary drive shaft and said bevel connection shaft; a secondary drive shaft parallel with said primary drive shaft and having an inferior end and a superior end; a secondary pinion gear disposed on said superior end of said secondary drive shaft for geared engagement with said second ring gear; and a secondary bevel gear connection in communication with said bevel connection shaft and said inferior end of said secondary drive shaft thereby enabling the rotation of said primary drive shaft to transfer the rotative action thereof through said bevel connection shaft to rotate said secondary drive shaft in the opposite direction than said primary drive shaft.