Abstract: A blade housing assembly for a power operated rotary knife including a split blade housing and an expansion sleeve assembly. The split blade housing including an annular blade support section and a mounting section extending from the blade support section. The mounting section includes a split extending through the mounting section and includes a first body portion and a second body portion on opposite sides of the split, the first body portion including a slot extending axially through the first body portion and movable between blade supporting and blade changing positions. The expansion sleeve assembly extends through the slot and includes a split sleeve changeable between first and second circumferences. The expansion sleeve assembly further including a fastener extends through the split sleeve and, when engaged with the split sleeve, maintains the split sleeve in the first circumference and secures the first body portion in the blade supporting position.

Abstract: A power operated rotary knife including an annular rotary knife blade supported for rotation in a blade housing. The rotary knife blade including a body and a blade section extending from the body. The body includes an outer wall including an arcuate surface having an upper region extending from a first upper end portion to a second intermediate portion and a lower region extending from the second intermediate portion to a third lower end portion. A plurality of gear teeth extend downwardly from the upper end of the body, each of the plurality of gear teeth including an outer peripheral face forming a portion of the upper region of the arcuate surface of the outer wall. The body outer wall includes a bearing surface having a lower bearing face in the lower region of the arcuate surface and an upper bearing face in the upper region of the arcuate surface.

Abstract: A blade housing assembly for a power operated rotary knife including a split blade housing and a cam mechanism for changing a blade housing diameter between blade supporting and blade changing positions. The split blade housing includes an annular blade support section, a mounting section and a split extending through the mounting section and an inner wall of the blade support section and defining a split distance between first and second circumferential ends of the inner wall. The split includes a radial split section and an angled split section adjacent the inner wall. The mounting section includes first and second body portions on opposite sides of the split. The cam mechanism includes a cam plate bridging the first and second body portions and a cam member rotatably supported by the cam plate. The cam member is rotatable between closed and open positions to change the blade housing diameter.

Abstract: A power operated rotary knife assembly including a power operated rotary knife having an annular rotary knife blade, a trim guide, and a drive mechanism for driving the rotary knife blade about an axis of rotation. The assembly also includes a portable power unit, a vacuum assembly and a flexible shaft drive transmission coupled between the power operated rotary knife and the portable power unit. The portable power unit includes a drive motor assembly providing a rotational power source which is operatively coupled to the drive mechanism through the flexible drive transmission to rotate the rotary knife blade. The portable power unit also includes a blower assembly providing vacuum pressure at an inlet duct side, the vacuum assembly being in fluid communication with the inlet duct side to generate a vacuum pressure condition in a region of a cutting opening defined by the rotary knife blade and the trim guide.

Abstract: A power operated rotary knife including an annular rotary knife blade supported for rotation in a blade housing. The rotary knife blade including a body and a blade section extending from the body. The body includes an outer wall including an arcuate surface having an upper region extending from a first upper end portion to a second intermediate portion and a lower region extending from the second intermediate portion to a third lower end portion. A plurality of gear teeth extend downwardly from the upper end of the body, each of the plurality of gear teeth including an outer peripheral face forming a portion of the upper region of the arcuate surface of the outer wall. The body outer wall includes a bearing surface having a lower bearing face in the lower region of the arcuate surface and an upper bearing face in the upper region of the arcuate surface.

Abstract: A power-driven feed roll for rotation about a feed roll axis of rotation in a hand-held, power operated trimming tool, the feed roll including a cylindrical core having an inner surface defining a through bore and an outer surface including a central cylindrical recess bounded by a base and first and second radially extending side walls at opposite ends of the base and first and second flanking portions on either side of the cylindrical recess. The feed roll further includes an annular drive member formed over the cylindrical recess and integral with the cylindrical core, the annular drive member extending along the first and second radially extending side walls of cylindrical recess and protruding radially outwardly, an outer surface of the annular drive member defining a worm gear for driving the feed roll about the axis of rotation. The first and second flanking portions including annular sets of drive teeth.

Abstract: A blade housing assembly for a power operated rotary knife including a split blade housing and a cam mechanism for changing a blade housing diameter between blade supporting and blade changing positions. The split blade housing includes an annular blade support section, a mounting section and a split extending through the mounting section and an inner wall of the blade support section and defining a split distance between first and second circumferential ends of the inner wall. The split includes a radial split section and an angled split section adjacent the inner wall. The mounting section includes first and second body portions on opposite sides of the split. The cam mechanism includes a cam plate bridging the first and second body portions and a cam member rotatably supported by the cam plate. The cam member is rotatable between closed and open positions to change the blade housing diameter.

Abstract: A power operated scribe saw including a head assembly affixed to a handle assembly. The head assembly includes a frame body, a drive train and a cutting blade. The drive train includes a worm driveshaft and worm rotating about a longitudinal axis of rotation and a blade driveshaft and worm gear rotating about a transverse axis of rotation, the cutting blade rotating with the blade driveshaft. The frame body includes a longitudinal throughbore and a transversely extending recess extending into a first side wall, the throughbore including a seating surface. A worm driveshaft support assembly supports the worm driveshaft for rotation and includes a first bearing engaging the worm drive shaft between the distal end of the worm driveshaft and the worm and a second bearing on the seating surface of the throughbore and engaging the worm drive shaft between the proximal end of the driveshaft and the worm.

Abstract: A blade housing assembly for a power operated rotary knife including a split blade housing and an expansion sleeve assembly. The split blade housing including an annular blade support section and a mounting section extending from the blade support section. The mounting section includes a split extending through the mounting section and includes a first body portion and a second body portion on opposite sides of the split, the first body portion including a slot extending axially through the first body portion and movable between blade supporting and blade changing positions. The expansion sleeve assembly extends through the slot and includes a split sleeve changeable between first and second circumferences. The expansion sleeve assembly further including a fastener extends through the split sleeve and, when engaged with the split sleeve, maintains the split sleeve in the first circumference and secures the first body portion in the blade supporting position.

Abstract: A power operated trimming tool including a head assembly affixed to a handle assembly. The head assembly includes a frame body supporting a feed roll, a blade, a blade support and a blade retainer plate. The frame body includes an interface portion affixed to the handle assembly and a support portion extending from the interface portion. The blade support includes a cross member of the frame body and defines a blade support slot and a blade receiving opening at a rearward end of the slot. The blade retainer plate is pivotally coupled to the frame body and pivots between first and second positions, in the first position, the blade retainer plate positioned in proximity to the blade receiving opening of the blade support and, in the second position, the blade retainer plate being spaced from the blade receiving opening allowing access to a back side of the blade.

Abstract: A power operated rotary knife including an annular rotary knife blade supported for rotation in a blade housing. The rotary knife blade including a body and a blade section extending from the body. The body includes an outer wall including an arcuate surface having an upper region extending from a first upper end portion to a second intermediate portion and a lower region extending from the second intermediate portion to a third lower end portion. A plurality of gear teeth extend downwardly from the upper end of the body, each of the plurality of gear teeth including an outer peripheral face forming a portion of the upper region of the arcuate surface of the outer wall. The body outer wall includes a bearing surface having a lower bearing face in the lower region of the arcuate surface and an upper bearing face in the upper region of the arcuate surface.

Abstract: A blade housing assembly for a power operated rotary knife including a split blade housing and a cam mechanism for changing a blade housing diameter between blade supporting and blade changing positions. The split blade housing includes an annular blade support section, a mounting section and a split extending through the mounting section and an inner wall of the blade support section and defining a split distance between first and second circumferential ends of the inner wall. The split includes a radial split section and an angled split section adjacent the inner wall. The mounting section includes first and second body portions on opposite sides of the split. The cam mechanism includes a cam plate bridging the first and second body portions and a cam member rotatably supported by the cam plate. The cam member is rotatable between closed and open positions to change the blade housing diameter.

Abstract: A power operated trimming tool including a head assembly affixed to a handle assembly. The head assembly includes a frame body supporting a feed roll, a blade, a blade support and a blade retainer plate. The frame body includes an interface portion affixed to the handle assembly and a support portion extending from the interface portion. The blade support includes a cross member defining a blade support plate receiving the blade. The blade retainer plate is pivotally coupled to the frame body, in a first position, the blade retainer plate overlies the blade and, in a second position, the blade retainer plate is spaced from the blade. An in-line, clutch engagement assembly provides a pair of clutch engagement plates coupled between a flexible shaft drive transmission and a driver assembly insertable into the handle assembly of the tool to provide one-handed actuation and de-actuation of the feed roll.

Abstract: A power operated rotary knife assembly including a power operated rotary knife having an annular rotary knife blade, a trim guide, and a drive mechanism for driving the rotary knife blade about an axis of rotation. The assembly also includes a portable power unit, a vacuum assembly and a flexible shaft drive transmission coupled between the power operated rotary knife and the portable power unit. The portable power unit includes a drive motor assembly providing a rotational power source which is operatively coupled to the drive mechanism through the flexible drive transmission to rotate the rotary knife blade. The portable power unit also includes a blower assembly providing vacuum pressure at an inlet duct side, the vacuum assembly being in fluid communication with the inlet duct side to generate a vacuum pressure condition in a region of a cutting opening defined by the rotary knife blade and the trim guide.