Abstract: A hand held rotary cutter comprising a first handle including a head at one end thereof for receiving a blade and a second handle pivotally connected to the first handle. The second handle includes a rotating member at one end thereof. The rotating member rotates into and out of alignment with the head of the first handle to guard the blade. A spring biases the first and second handles to an open position, and a latch is mounted on one of the first and second handles and movable between an unlocked position and a locked position. The latch is engageable with a member on the other of the first and second handles. When the latch is in the unlocked position, the first handle and the second handle are fixed in position relative to each other.

Abstract: A pizza cutter and eating tool has a fork portion, an elongated handle connected to a rearward end of the fork portion. A cutting wheel mounting area is located in the handle adjacent the rearward end of the fork portion. An elongated longitudinal slot is located in the mounting area. Cutting wheel mounting tabs have upper ends secured to a center portion of the slot and they extend downwardly therefrom below the fork. A pizza cutting tool is rotatably mounted on the mounting tabs and an upward periphery of the wheel extends partially through the elongated slot. An arcuate elongated guard member extends from a forward end of the slot, thence upwardly and over a portion of a periphery of the cutting wheel, and thence extends downwardly through a rearward end of the elongated slot, and thence outwardly and rearwardly from an adjacent portion of the periphery of the cutting wheel below the elongated slot.

Abstract: A cutting and grinding tool for removing grout from between tiles comprises a rotatable cutting disc formed with a plurality of radially extending teeth about the circumference of the disc. A drive gear engagable with the teeth is rotated by a power drill to exert a drive force to rotate the cutting disc. The disc teeth serve a dual function of performing a cutting and grinding operation and transmitting the drive force of the drive gear to rotate to the disc. The tool is simple in construction, reliable in operation and easy to control in order to efficiently remove grout from between tiles.

Abstract: An edge trimming tool for trimming the edge of a piece of material. The edge trimming tool includes a trimming head rotatably attached to a handle. The trimming head defines a first cylindrical section having a peripheral surface and a pair of substantially flat side surfaces. The trimming head also defines a second cylindrical section extending laterally from one of the side surfaces of the first cylindrical section. The second cylindrical section also includes a peripheral surface and a side surface located opposite the first cylindrical section. The intersection between the outer peripheral edge and one of the flat lateral edges of the first cylinder defines a substantially sharp cutting intersection adapted to be used for cutting the material to be trimmed.

Abstract: A rotary-blade cutting apparatus which includes a spring-biased cutting-blade cover. The cover is spring biased to a closed position and includes a projection for manually applying a hold-open force to rotate and hold the spring-biased cover in an open or retracted position in a cutting-blade chassis. The handle of the apparatus is angled to provide for a more comfortable grip.

Abstract: A food cutting utensil, (e.g., a rotary pizza cutter) includes a disc and a handle that are selectively connectable together. The disc has a first side, a second side and a central through bore that is substantially aligned with an axis of the disc. A rim projects from the first side of the disc about the through bore. The handle has a first portion for being gripped by a hand while being used as a cutting utensil, and a second portion for rotatably supporting the disc. The second portion has a first arm and a second arm. The first arm has an axially projecting hub that is received in the through bore when the handle is connected to the disc.

Abstract: Around a push button formed on an arm 3, teeth are disposed at a regular angle, and around the push button inserting hole in a handle 4 grooves are disposed corresponding to the teeth, thereby, by biasing the arm 3 with a compressed coil spring to engage the teeth with the grooves. Whereby, by pushing the push button to cause the arm to stroke, the engagement of the teeth and the groove is released to cause the arm 3 to turn and by freeing the push button the teeth and the grooves are engaged, thereby the arm 3 is positioned and held at a desired position.

Abstract: A food cutting utensil, (e.g., a rotary pizza cutter) includes a disc and a handle that are selectively connectable together. The disc has a first side, a second side and a central through bore that is substantially aligned with an axis of the disc. A rim projects from the first side of the disc about the through bore. The handle has a first portion for being gripped by a hand while being used as a cutting utensil, and a second portion for rotatably supporting the disc. The second portion has a first arm and a second arm. The first arm has an axially projecting hub that is received in the through bore when the handle is connected to the disc.

Abstract: A roller cutter has a partially circular housing having a slit extending in from receiving a cutter wheel, which can be selectively shifted between an extended cutting position and a retracted position enclosed within the housing to protect the cutter wheel cutting edge. A push button operates a latch release to allow shifting between these positions. A slide bar mounting the cutting wheel for shifting movement is itself held in a slot in the housing, but may be released for removal and cleaning. A tangential grip at the top of housing allows convenient stroking for cutting pizza, mincing herbs, etc.

Abstract: It is possible by use of a disclosed cutter wheel to obtain deep vertical cracks inside brittle materials while suppressing generation of horizontal cracks. Such a cutter wheel for brittle materials comprises a disk with two side planes and an outer periphery between them, outer periphery comprising two bevel portions and a ridge portion between them. The ridge portion comprises a plurality of peaks aligned along a circumferential line. For example, the ridge portion comprises a straight line connecting two adjacent peaks in the plurality of peaks. Alternatively, the ridge portion comprises a depression between two adjacent peaks in the plurality of peaks, and the depth of the depression is deeper than the straight line connecting between the two adjacent peaks. Preferably, the peaks are arranged at an equal distance between them.

Abstract: A cutting device (1) for floor coverings, intended for cutting or starting a tear of seams, includes a base body (2) with at least one blade (3) that is mounted on the base body (2), and a contact edge (4), envisioned on the bottom side (5) of the base body (2), for an edge of a floor covering. A removable first plate (6) and a removable second plate (7) are attached in the front area of the base body (2), and the blade (3) can be arranged parallel to the contact edge (4) between the plates (6, 7). To provide a cutting device (1) that allows for the simple adjustment of the cutting width, at least one additional plate (8, 9, 10) is provided, allowing the blade (3) to be arranged, if necessary, between the second plate (7) and the additional plate (8) or between adjacent additional plates (8, 9, 10).

Abstract: A round knife including a handle which is provided in a head end thereof with a slot for receiving pivotally a round knife blade and a support frame. The slot is provided with a protective groove for retaining and locating the support frame. When the support frame is securely engaged with the protective groove, the round knife blade is concealed securely by a protective shield of the support frame. The support frame can be actuated by an actuation piece to rotate so as to expose the round knife blade to execute the cutting operation.

Abstract: The present invention is directed to a cutter having a disposable blade cartridge, a grip for handling by a user, and a coupling arrangement for coupling the cartridge to the grip in such a manner to prevent undesired rotation of the cartridge with respect to the grip. The blade cartridge includes a blade, an upper cover, and a lower cover, the blade being rotatably supported therebetween. The upper cover is further provided with a locking protrusion at one end and a locking recess. The locking protrusion is inserted into a locking aperture that is carried by the grip, thereby acting against a spring-biased pusher within the aperture. The grip further carries a spring-biased locking member that mates with the locking recess of the upper cover. To attach the blade cartridge to the grip, the locking protrusion is inserted into the locking aperture, against the spring-biased pusher. The cartridge is then rotated 90° clockwise, thereby locking the protrusion in the aperture.

Abstract: A gripping type of cutter knife wherein a knife blade can be locked into both the retracted and projected positions. This cutter knife includes a locking mechanism of which construction and handling are simple. In this cutter knife, a knife blade is projected by grasping, against spring force, a trigger lever projected from the grip portion of the cutter body. This cutter knife is characterized in that it has a push-type locking mechanism which is selectively held in “unlocking position” wherein the trigger lever is allowed to swing, or “locking position” wherein the swing is prohibited.

Abstract: A tool is described as including a pivotable guide member through which a rotatable cutting blade extends. As the cutting tool is advanced over the object to be cut, the guide member pivots in response to contacting the object which allows the object to be compressed under the guide member if desired. The guide member includes rounded first and second ends which accommodate using the cutting tool by either dragging the tool rearwardly or pushing the tool forwardly over the object.

Abstract: A rotary cutter has a handle, a rotary blade having a cutting edge, a protective member for covering the blade, a lock mechanism for locking the protective member, and a brake mechanism for applying rotational resistance to the blade. The blade is rotatably supported by the handle. The protective member moves between a first position, in which the protective member is held to prevent exposure of the cutting edge of the blade, and a second position, in which the protective member permits exposure of the edge of the blade. The lock mechanism moves between a lock position, in which the protective member is positioned in the first position, and an unlock position, in which the protective member is positioned in the second position. The control element is common to both the lock mechanism and the brake mechanism for operating both the lock mechanism and the brake mechanism.

Abstract: A cutter wheel which can form a deep slit on an article to be cut so that the article can be broken easily along the slit and a perpendicular cut surface can be formed reliably when the article is broken along the slit. The cutter wheel is a disk-shaped member having a cutting edge along the outer edge and formed with a mounting hole extending therethrough along its axis. The mounting hole has an irregular shape so that the cutter wheel vibrates when it rolls due to steps between adjacent sides of the polygonal hole. The edge of the wheel can thus penetrate more deeply into the glass plate so that a deeper and smoother slit can be formed in the glass plate. This in turn makes it possible to more easily break the glass plate along the slit and to form a perpendicular cut surface.

Abstract: A physiologically appropriate hand-held cutter for fabric and sheet goods comprising a rotary cutter blade encased within a handle that includes a recessed depression within the handle surface essentially proximate the area of the handle enclosing the blade within which the user's thumb is positioned when the cutter is in use and optionally including a head section forward the section enclosing the blade for receiving the user's forefinger. The cutter fits naturally in the palm of the hand and reduces strain on the carpel tunnel area of the wrist.

Abstract: A glass cutting disc forms a scribed line on a surface of a glass product along which the glass product can be broken when an external force is applied thereto. The glass cutting disc includes an outer peripheral portion radially outwardly beveled to define a peripheral ridge. The peripheral ridge has surface features formed thereon so as to alternate in a direction circumferentially of the cutting disc. The surface features may be in the form of protrusions and grooves that alternate with each other over the peripheral ridge.

Abstract: A rotary cutter includes an elongated handle having a gripping portion connected to a platform having a peripheral edge. A generally circular blade is rotatably mounted on a shaft extending through an aperture formed in the platform. The cutter also includes a blade guard having an arcuate portion. The guard is rotatable by the user to expose the cutting edge of the blade prior to using the cutter.

Abstract: A rotary cutter including a handle, a cylindrical head formed on one end of the handle and having a planar surface on each side, the handle and head having an interval cavity, an actuating member mounted in the cavity in the handle and head, a blade support formed on the actuating member for movement between a storage position and one of two operating positions with respect to the head, a spring mounted on the actuating member for biasing the actuating member to ta storage position and a latch assembly formed in the actuating member for electively locking the actuating member in one of the two operating positions.

Abstract: An assembly including a wheel-shaped cutting blade and protective cover may be attached to a multiple function cutting tool by inserting an engagement member of the assembly into a connecting chamber of the tool and securing the member to the tool with a screw. The protective cover is slidably mounted on a connecting member and disposable in either a first position for exposing the blade or a second position for concealing the blade.

Abstract: A hand tool comprising an angular handle, a circular blade and a hand guard permits efficient removal of caulking in window units.

Abstract: A scalpel includes a circular blade rotatably attached to one end of a handle. A circular depth guard having a diameter smaller than that of the blade is rigidly and coaxially connected thereto. The depth guard includes tractional knurls arranged around a rim thereof. Pressing the blade into a piece of tissue causes penetration thereinto until the depth guard engages the tissue. Pulling the scalpel along the tissue causes the depth guard to roll along thereon and rotate the blade, which makes a cut with a rolling motion that minimizes tissue adhesion and dragging for a smooth and even incision. The depth guard ensures that the blade cuts at a precisely known and perfectly even depth. The tractional knurls ensure reliable rotation of the depth guard and the blade even on wet and slippery tissue. In a second embodiment, a rotary depth guard is attached to a fixed blade. In both a third and a fourth embodiment, a circular rotary blade and a circular rotary depth guard are eccentrically mounted.

Abstract: A rotary cutter employs a disc blade removably mounted on a cylindrical bearing surface portion carried to upstand from adjacent one end of a handle and a swing arm movable between a retaining position in which it overlies the disc blade and a release position in which it is removed from overlying relation with the disc blade to permit removal thereof, wherein a first latch portion disposed adjacent the bearing surface portion and a second latch portion carried by the swing arm engaged to removably retain the swing arm in its retaining position.

Abstract: A rotating cutter for cutting pizza or other planar objects. The inventive device includes a substantially U-shaped handle with a rotating cutting wheel mounted to the base of the handle. The handle is oriented relative to the cutting wheel such that a downward force can be applied to the wheel during a cutting procedure.

Abstract: A cutter includes a movable blade, a handle and a slider. The movement of the slider causes the blade to move between an extended cutting position and a retracted storage position. The slider includes one projection which is pressed against a surface of the blade so as to frictionally engage the blade for preventing its free rotation or movement during the cutting operation.

Abstract: A package for carrying and transporting a pizza product or like food article in which a combination device is used both to support a top panel of the package and prevent it from contacting the pizza product and to slice the pizza product at the place of consumption.

Abstract: The present pizza cutter of a unique design has a circular blade mounted in a fork on the forward end of an arch-shaped frame. The intermediate portion of the frame is a handle for holding the pizza cutter. The arched shape of the handle prevents the hand from contacting the pizza during cutting. The handle has a thumb guide for applying pressure to cut the pizza, a thumb guard for preventing the thumb from contacting the blade, and a fender to protect the hand from contacting the blade. The rearward end of the frame is a support for supporting the pizza cutter in a vertical position on a horizontal surface when not in use. The blade is attached to the frame by a hub between the tines of the fork, thereby preventing the blade from wobbling during cutting. The pizza cutter also has a stand adapted to receive the blade and support.

Abstract: A rotary cutter having a handle, a cylindrical head formed on one end of the handle and having a planar surface on each side of the head, an actuating member pivotally mounted in the head, a circular blade mounted on the actuating member and having a pinking or wave shaped cutting edge offset from the blade to form a hub, the blade being secured to one side of the actuating member with the hub located in a parallel relation to one of the planar surfaces, and a finger guard formed as an integral part of the handle and head.

Abstract: A utility knife has a bolster formed at a downward angle from a body which receives a blade shield and a circular blade. A channel is formed in the body at the bolster and has an upper pair of notches and a lower pair of notches. The blade shield has a circular portion which has a diameter greater than that of the blade and a pair of resilient arms each with a tab. When the tabs are engaged with the lower pair of notches, the blade shield shields the blade, and when the tabs are engaged with the upper pair of notches, the blade is exposed.

Abstract: A rotary cutter having a handle, a cylindrical head formed on one end of the handle and having an internal cavity with a planar surface on each side, an actuating member is pivotally mounted in the cavity with a circular blade secured to one side of the actuating member in a parallel relation to one of the planar surfaces, a pivoting member is provided on the periphery of the head for moving the actuating member to an operative position with a portion of the blade projecting outwardly from the cylindrical head, the actuating member being biased to a storage position within the cylindrical member.

Abstract: Rotary scalpel blade and blade protector structure. The rotary scalpel blade in one embodiment is circular and has a sharpened outer periphery and an opening through the center thereof for securing the blade to means for rotating the blade. In modifications of the circular scalpel blade the sides of the scalpel blade may be concave, depressed or flat with an annular groove around the outer periphery thereof. The rotary scalpel blade may also be a linear radial scalpel blade sharpened on one or both edges. The blade protector structure in one embodiment includes a disc having a disc shaped pocket in the center thereof split centrally to receive a scalpel blade, held together with a living hinge and locked in closed position by a split cylinder positioned over a cylindrical flange on one side of the blade protector.

Abstract: Rotary scalpel structure and method which rotary scalpel may be either manual or automatic. The manual rotary scalpel structure includes an handle having a bifurcated end between the ends of which a circular scalpel blade is mounted for rotation. The automatic rotary scalpel includes a circular scalpel blade secured at one end of a blade support arm connected to a handle having a drive motor secured to the other end thereof and means extending through the handle and the blade support arm for rotating the circular scalpel blade on energization of the motor. The automatic rotary scalpel includes structure for releasably securing the blade support arm to the handle. A circular scalpel blade is also provided which has concave surfaces to reduce blade friction along with a blade container for transporting and storing circular scalpel blades.The method includes manually or automatically rotating a circular scalpel blade and drawing it across an area in which an incision is required.

Abstract: A tractor-towable sidewalk edging device includes a pair of laterally spaced cutting blade members and the depth of the cut the blade members make in vegetation to be trimmed is controllable by adding or removing weight members to receptacle members which form a part of the device. The lateral spacing between the cutting blade members is adjustable in three different ways. Each cutting blade member may also be pivoted about a vertical axis.

Abstract: A manual cutting device for severing generally planar food stuffs, such as pizza, which is characterized by an elongate handle provided with a removably mounted, circular cutting blade rotatably mounted to the handle. A removably mounted pivot pin is provided which is releasably locked through aligned openings in the handle and the circular cutting blade to permit easy assembly and dis-assembly of the handle and cutting blade for cleaning purposes.

Abstract: A manual method of making a surgical incision in free tissue including moving a freely rotatable circular scalpel blade across an area of the free tissue at a desired incision depth without pressing the tissue to a mechanical backing member wherein the circular scalpel blade is rotated solely by friction between the blade and the tissue in which the incision is required. The scalpel blade may be pushed or pulled across the area of free tissue, preferably at a speed of between four and seven centimeters per second.

Abstract: According to the invention, a pizza cutting device is provided comprising an elongate handle, a cutting wheel with a peripheral cutting edge and a hub having a bore with a central axis and structure for removably assembling the handle with the cutting wheel so that the cutting wheel is guidingly rotatable relative to the handle about the hub central axis. The handle has spaced bearing surfaces which stabilize the device during use.

Abstract: A cutter having a circular rotary blade comprises: a handle; a blade mounting section formed on one end of the handle; a circular blade secured to one side of the blade mounting section and rotatably carried at its central portion; a slot having an opening formed in the blade mounting section at a position behind the central portion of the circular disc and corresponding to the circular blade; a pressing member movably received in the slot and projectable through the opening of the slot into pressure contact with one side of the circular blade; and an operation member adapted to limit the movement of the pressing member so as to adjust the pressure of contact between the pressing member and the circular blade, the operation member being held in engagement with the pressing member through cam means and positioned on the opposite side of the blade mounting section to the circular blade.

Abstract: A rotary cutter which includes an elongated handle having an aperture extending through its one end, a shaft extending through the aperture so as to be supported by the handle, a disc blade rotatably mounted on the shaft and lying in a plane perpendicular to the longitudinal axis of the shaft, and a member engageable with the shaft, with a bearing projection formed on the handle coaxially with the aperture.

Abstract: A fabric cutting tool comprising an elongated shank curved and bifurcated at one end and a handle on the other, the bifurcated end having a spring loaded rotary cutting blade rollingly mounted between the bifurcation, a protective shield for the blade, a pair of guide wheels for assisting in the cutting, and a foot plate providing a cutting surface for the fabric.

Abstract: A rotary cutter which includes an elongated handle having an aperture extending through its one end, a shaft extending through the aperture so as to be supported by the handle, a disc blade rotatably mounted on the shaft and lying in a plane perpendicular to the longitudinal axis of the shaft, and a member engageable with the shaft, with a bearing projection formed on the handle coaxially with the aperture.