Patent ID: 6739055
Filing Date: 2004-05-25
Classification: B23D

Abstract:
A rotatable tube cutter, for cutting a tube-like work piece, said rotatable tube cutter comprising:a fixing portion, one end of said fixing portion being a casing, the other end of said fixing portion being disposed with a handle, said casing having a central space for receiving said work piece and a recess for connecting said central space with an outer space, a first guiding slot and a second guiding slot being disposed on an inner surface of said casing, and said handle having an internal slot, a positioning section being disposed in a predetermined position within said internal slot, said first guiding slot having at least two locking cavities spaced apart more than a width of said recess, a locking element that is able to rotate an angle and a resilient element being disposed in said locking cavity; a rotatable portion having a first C-shaped casing, a second C-shaped casing, a curved casing and a fixing rib, said first C-shaped casing being disposed with a C-shaped ratchet teeth portion, said first C-shaped casing and said C-shaped ratchet teeth portion being slidably fitted on a first guiding slot of said fixing portion, said second C-shaped casing being slidably fitted on a second guiding slot of said fixing portion, said C-shaped ratchet teeth portion engaging with at least one locking element so as to limit said rotatable portion to rotate along one direction, a supporting hole being disposed on said fixing rib, and said curved casing having a guiding slot and a receiving portion; a cutting blade assembly including a rotating shaft supported by said supporting hole, a cutting blade seat, and a roller seat; said rotating shaft having a threaded portion and a clutching seat locating within said receiving portion, said cutting blade seat engaging with said threaded portion, a disk-like rolling blade being disposed on said cutting blade seat, a cooperating portion being pivotally disposed on said roller seat to cooperate with said rolling blade; and a feeding assembly having a clutching rod disposed in said internal slot, a clutching resilient element installed in said positioning section and a feeding knob disposed on an outer end of said handle; one end of said clutching rod being a clutching end, a feeding knob disposed on the other end of said clutching rod, a pushing plate being disposed on said clutching rod so as to resist said clutching resilient element; wherein when said clutching end of said clutching rod engages into said rotating seat of said cutting blade assembly and said feeding knob is rotated by a user, a gap between said rolling blade and said cooperating portion is controlled.