Abstract: A pad assembly is described that retains a blade assembly or set to the body of a hair cutter. The pad assembly reduces random forces generated by the blade assembly and ensures an accurate and repeatable tension is maintained between the inner and outer blades of the blade assembly. The pad assembly acts as an intermediary between the blade assembly and the body of the hair clippers to reduce challenges associated with fasteners directly attaching the blade assembly to the body of the clipper.

Abstract: A pocket knife includes a chassis and an insert engaged with the chassis, wherein the insert defines an insert surface. A blade has a retracted position in which the blade is inside of the chassis and a deployed position in which at least a portion of the blade is outside of the chassis. An actuator is slidingly engaged with the chassis to reposition the blade between the retracted and deployed positions. A lock is pivotally connected to the chassis and engaged with the blade in the deployed position to lock the blade in the deployed position. A stop pin is connected to the blade, and an end of the stop pin extends a predetermined distance from the blade to engage with the insert surface when the blade is in the deployed position to prevent movement of the blade with respect to the chassis.

Abstract: A hair-cutting unit with rotatable cutting elements for use in a shaving device has hair entry slits of which at least a side surface facing in a direction generally opposite to a direction of rotation of the cutting elements, has a relatively flat and oblique intermediate segment between an upper segment forming a curved transition to the outer surface of the annular wall and a lower segment which serves for catching hairs and urging these into an upright position for achieving a close shave. Within a relatively broad range of shaving pressures, the pleat of skin bulging into a hair-cutting slit contacts a portion or at most all of the intermediate segment. Because the intermediate segment is relatively flat, changes in the extent of skin penetration in response to changes in shaving pressure are significantly reduced.

Abstract: A drive cap uses snap fasteners to couple with the housing assembly of a hair clipper. The drive cap uses joining structures to align with the upper and lower housings of the housing assembly. Once correctly aligned, snap fasteners enable a snug fit and enhance the finish of the hair clipper. The snap fasteners can be located on an inner surface of the drive cap, lower housing, and/or upper housing. A snap detent is located on the inner surface of an adjacent surface to receive the snap fastener. A combination of protrusions, extensions, voids, and recesses, in addition to the snap fasteners ensures a secure fit for the drive cap between the upper and lower housings. The snap fasteners couple the drive cap to upper and lower housings seamlessly along the outer surface of the hair clipper and facilitate quick release of the drive cap for maintenance or cleaning.

Abstract: A fixed blade knife includes a first scale having a first scale inner surface and a second scale opposed to the first scale having a second scale inner surface. A blade has a cutting edge that extends from the first and second scales and a tang that extends between the first scale inner surface and the second scale inner surface. A first recess in the first scale inner surface extends from the first scale inner surface partially through the first scale, and a first flange is around at least a portion of the first recess in the first scale inner surface. A first boss extends from the tang of the blade into the first recess in the first scale inner surface, and a perimeter of the first boss increases away from the tang of the blade.

Abstract: A folding implement such as a knife having a handle and a blade or tool rotatably connected to the handle by a fixed bearing surface. The handle includes a first scale or side and a second scale or side, wherein a first fixed bearing surface is connected to the first scale and a second fixed bearing surface is connected to the second scale, with the blade or tool positioned between the first scale and second scale and in contact with the bearing surfaces. The bearing surfaces contact an adjacent side surface of the tang of the blade or tool and sweep there across when being moved from a closed position to an open position or vice-versa. The bearing surfaces are fixed in the scales and do not rotate thereby providing a consistently reliable mechanism for reducing operating friction.

Abstract: A folding knife includes a handle, a blade, and first and second bearing pivots. The handle has first and second bearing apertures that open to an exterior of the handle. The blade is disposable at least partially within the handle and between the first and second bearing apertures. The first and second bearing pivots are insertable respectively into the first and second bearing apertures. Each of the first and second bearing pivots includes a thrust bearing surface, and at least one of the first and second bearing pivots includes a radial bearing surface about which the blade is configured to rotate. At least one of the first and second bearing pivots is selectively replaceable from the exterior of the handle to convert the knife between manual and automatic functions.

Abstract: Certain embodiments of a folding knife are disclosed. In one embodiment, an example knife may include a handle and a blade carrier. The blade carrier may be rotatable about the handle and may include a left and a right cap. A blade may be removably disposed within the blade carrier. The knife may further include a blade release mechanism. In one embodiment, the blade release mechanism may include a compression spring and a lift bar. In another embodiment, the blade release mechanism may further include a wheel. In yet another embodiment, the blade release mechanism may include a leaf spring and a slide bar. When the blade carrier is rotated such that the knife is not in a cutting position, at least a portion of the blade release mechanism is exposed. When the blade release mechanism is activated, the blade may be removed from within the blade carrier.

Abstract: A hand tool with a replaceable workpiece head includes a handle and a workpiece head. A rear end of the workpiece head is provided with an insertion block. A front end surface of the handle is provided with an insertion hole. The insertion block of the workpiece head is inserted into the insertion hole. A side wall of the handle is provided with a receiving slot which is communicated with the insertion hole. A rear end of the insertion block is provided with a locking part. The receiving slot is provided with a movable locking member and a pushing mechanism. The pushing mechanism is capable of pushing the movable locking member such that the movable locking member and the locking part are engaged with each other.

Abstract: A nail cutter is provided that includes a blade and a unitary body. The blade includes a cutting edge. The unitary body includes a first member, a second member, a third member, and a plurality of flexible hinges. The blade extends from a proximal end of the first member. A proximal end of the second member is disposed opposite the cutting edge of the blade. The plurality of flexible hinges are configured such that, when a proximal end of the third member is transitioned from a first position to a second position, the unitary body flexes at the plurality of flexible hinges so as to decrease a distance between the cutting edge and the proximal end of the second member. Other aspects and features are also claimed and described.

Abstract: A reciprocating cutting tool reduces dispersion of dust. The reciprocating cutting tool includes a reciprocation converter drivable by a motor, a rod-like slider connected to the reciprocation converter to be reciprocable, a blade holder at the front end of the slider to hold a blade, a power transmission housing housing the reciprocation converter and allowing the slider to protrude from its front end, a cover outward from the power transmission housing, and a fan rotatable together with a rotor in the motor. A first passage of cooling air from the fan is defined between the power transmission housing and the cover. The first passage branches into a second passage toward the blade holder and a third passage not toward the blade holder.

Abstract: A razor cartridge comprising a first blade support and a second blade support, each of the first and second blade supports include a flat portion having a lower surface and a front end. A support plane S is tangent to the respective front ends of the first and second blade supports and the lower surface faces away from the support plane S. A first blade is attached to the lower surface of the flat portion of the first blade support. The first blade includes a first cutting edge. A second blade is attached to the lower surface of the flat portion of the second blade support. The second blade includes a second cutting edge. The first and second cutting edges are offset with respect to the support plane S.

Abstract: A coating removal device removing a coating of an optical fiber along an axial direction of the optical fiber includes a heating portion including a cutting blade making a cut in the coating of the optical fiber, and a heater heating a part of the coating that is closer to a tip thereof than the cutting blade; a main body portion including a control board electrically connected with the heater; a holding portion holding the optical fiber, the holding portion being provided on the opposite side to the heater with the cutting blade being located between the holding portion and the heater; and a slide mechanism allowing the holding portion to slidably move with respect to the heating portion such that the holding portion is distanced away from the heating portion in the axial direction.

Abstract: In a combination of a sprocket arrangement (128) and a saw chain (16), a sprocket tooth spacing (TI) between consecutive sprocket teeth (40) relates to a drive link spacing between consecutive drive links (30) of the saw chain (16) such that the guide teeth (42) of two or more drive links (30) may enter between a pair of consecutive sprocket teeth (40).

Abstract: A pocket knife includes a chassis and a blade having a retracted position in which the blade is locked inside of the chassis and a deployed position in which at least a portion of the blade is locked outside of the chassis. An actuator is slidingly engaged with the chassis to reposition the blade between the retracted and deployed positions. A lock is pivotally connected to the chassis and has a surface defined by the lock. A first projection extending from the surface of the lock engages with the blade in the deployed position to lock the blade in the deployed position.

Abstract: A coupling mechanism 10 comprising a first coupling element 20 having a first engagement surface 34 configured to pivot about a pivot axis located external to the coupling mechanism, a second coupling element 40 including a second engagement surface 52 configured to come into contact with the one or more first engagement surface, the second coupling element being capable of moving from a first position to a second position and from the second position to the first position, a third coupling element 60 configured to support the first coupling element and the second coupling element, a stop 58 positioned inwardly of the first coupling element configured to impede pivoting of the first coupling element. The stop impedes pivoting of the first coupling element when the second coupling element is in the first position and the stop no longer impedes movement of the first coupling element when the second coupling element is in the second position.

Abstract: A grass trimmer includes a grass trimmer head, a drive device, and an operating member. The grass trimmer head includes a spool used for a grass trimmer rope to be wound around and a head housing for accommodating at least part of the spool. The drive device is configured to drive the grass trimmer head to rotate. The operating member is connected to the drive device and includes an operating portion for a user to operate. The grass trimmer has a winding mode. In the case where the grass trimmer is in the winding mode, movement of the operating member is transmitted to the spool or the head housing through the drive device so as to generate relative movement that is between the spool and the head housing and through which the grass trimmer rope is wound around the spool.

Abstract: A chainsaw may include a saw chain; a guide bar, a sprocket, a prime mover, a housing, a sprocket cover, and a guide member. The guide bar, the housing and the sprocket cover may define a chain passage. The guide member may include a first facing surface having an arc shape centered on the rotation axis and a second facing surface having an arc shape centered on a position offset from the rotation axis. When the chainsaw is placed on a horizontal mounting surface and viewed in the direction along the rotation axis, an angle between (i) a straight line connecting the rotation axis and a position where the first facing surface and the second facing surface are connected and (ii) a horizontal plane may be in a range of ?10 degrees to 25 degrees.

Abstract: A chainsaw includes a chain tension mechanism. The chain tension mechanism includes: an adjustment dial made of resin and rotatable about an axis in a right-left direction; a rotation transmission member made of metal and rotatable about an axis in the right-left direction; a feed screw member made of metal and rotatable about an axis in a front-rear direction; and a slide member coupled to a guide bar. The slide member is screwed to the feed screw member. A first gear of the adjustment dial is meshed with a second gear of the rotation transmission member, and a first bevel gear of the rotation transmission member is meshed with a second bevel gear of the feed screw member.

Abstract: A knife includes a handle, a neck configured to hold a blade, and a lever configured to selectively release the blade from the neck. The lever is coupled to a blade lock arm configured to extend along a side of the blade. A ramped surface pushes the blade lock arm into the blade to press the blade against a side of the neck to clamp the blade to the side of the neck when the blade lock arm is in a blade locked position.