47results about "Cross-cut saws" patented technology

A pruning saw includes an elongated sawblade which has a line of cutting teeth. Opposite sides of the blade extending between the line of teeth and the back edge are concave. A thinnest waist between the concave sides is located closer to the line of teeth than to the back where the blade has its maximum height. A front edge of the blade forms a rounded corner where it intersects the back edge.

A hand tool includes a replaceable cutting portion having an elongate cutting surface, a body and a handle. The body receives displaceable protecting apparatus for shielding the cutting surface of the cutting portion when not in use. A forward distal end of the protecting apparatus contacts a portion of the surface of the object to be cut such that when pressure is applied against the object surface displacement of the protecting apparatus relative to the replaceable cutting portion is effected to expose only as much of the cutting surface as needed to effect the required cut. Alignment means maintain alignment of the replaceable cutting portion relative to the protecting apparatus throughout the cutting. When the cutting action is completed resilience means facilitates return of the protecting apparatus so the cutting surface is no longer exposed.

A folding saw in which either the edge of the blade, the handle or both are curved, to prevent the edge of the blade from being exposed when blade is folded so that the saw can be handled safely. The protective cover in which the edge of the blade can be nestled is placed inside the housing groove of the handle having a semi-U-shaped cross section for housing the blade. The protective cover is retractable with respect to the housing groove, and when the blade is folded, projects out of the housing groove and covers the edge, which may be exposed. The protective cover is preferably energized by a spring so that it covers the edge whenever the blade is folded.

Disclosed is a lithium secondary battery comprising: (a) a cathode; (b) an anode; (c) a separator; and (d) a non-aqueous electrolyte comprising a lithium salt and an organic solvent, wherein the cathode comprises a cathode active material, doped with at least one element selected from the group consisting of Sn, Al and Zr, or containing the element in the form of a solid solution, and the non-aqueous electrolyte comprises a lithium-containing inorganic salt and a lithium imide salt dissociated in at least one organic solvent including gamma-butyrolactone (GBL). The lithium secondary battery can minimize side reactions between both electrodes and gamma-butyrolactone (GBL), used as a conventional electrolyte for a battery, and thus can provide high capacity, long service life and improved quality at high-temperature.

A handsaw includes a handle, a blade removably mounted on the handle, and a press button pivotally mounted on the handle and detachably engaged with the blade to lock the blade on the handle and unlock the blade from the handle. Thus, the blade can be detached from the handle easily and rapidly by pressing the pressing portion of the press button, thereby facilitating the user replacing the blade. In addition, the concave face of the blade is rested on the convex face of the handle, so that the blade is supported by the handle rigidly and stably, thereby facilitating a user operating the handsaw.

A damper assembly for a fuel pump includes at least one diaphragm assembly formed by joining two metal diaphragms to respective two sides of an imperforate central plate, thereby creating a pair of closely spaced diaphragms, each acting upon its own gas volume. Preferably, the diaphragm assembly has (a) a rigid, relatively thick circular or polygonal central plate, (b) a first circular diaphragm having a rim portion sealingly secured as by welding to the plate and a relatively thin, flexible, convex portion projecting from one side of the plate and defining a first pressurized gas volume, and (c) a second circular diaphragm having a rim portion sealingly secured as by welding to the plate and a relatively thin, flexible, convex portion projecting from the other side of the plate and defining an independent second pressurized gas volume.

A handsaw includes a blade having a toothed cutting edge pivoted to a handle. The handle includes a frame and a tooth protecting element. The tooth protecting element is pivoted to the frame to be swung between a working position and a retracted position. Each of the frame and the tooth protecting element includes a gap, whereby when the tooth protecting element is in a retracted position, the gaps are aligned to receive the blade. When the blade is in a retracted state, a portion of the cutting edge is exposed to enable purchasers or users to know what type of cutting edge is provided on the blade without having to move the blade to a working position.

A working toolkit includes an extendible shaft, a tool handle and a tool head, each having connection formations so that the tool handle may be releasably attached to one end of the shaft, and the tool head may be releasably attached to an opposite end of the shaft to form a working tool, and thereafter disassembled for storage and transportation in a compact form. The tool handle may be directly releasably attached directly to the tool head. A variety of connection formations are provided, particularly adapted for a tubular shaft. The working toolkit may include several different tool handles and tool heads for selectively forming a variety of working tools.

A multi-purpose handheld tool including a handle, a hatchet head portion, a saw blade and a saw blade control mechanism. The handle has a first end and a second end. The handle has a slot formed therein. The hatchet head portion is operatively coupled to the first end of the handle. The saw blade is pivotally coupled to the handle. The saw blade control mechanism pivots the saw blade between a storage configuration and a use configuration. The saw blade control mechanism includes a saw control handle and a saw control hub. The saw control handle has a gripping extension extending therefrom. The gripping extension indicates a direction of the saw blade with respect to the handle. The saw control hub engages the saw blade.

A saw comprises a generally planar saw blade, a handle, and a depth control guide. The blade has an arcuate cutting edge. A shank portion of the saw blade is pivotally connected to the handle in a manner to permit pivoting movement of the saw blade relative to the handle in a plane of the saw blade. The depth control guide comprises an arcuate depth control surface, which is adapted for engagement with a surface of material being cut with the saw in a manner to control cutting depth. The arcuate depth control surface has a curvature that approximates a curvature of the arcuate cutting edge of the saw blade. The depth control guide is adjustably connected to the saw blade in a manner so that the distance between the arcuate depth control surface and the arcuate cutting edge of the blade can be selectively adjusted to achieve a desired cutting depth.

A multi-angle cutting saw that can protect saw teeth from damage, perform multi-angle cutting, and is easy to transport, is provided. The saw includes a handle, a locking bolt, a saw blade, a guide block, and a return mechanism. The saw blade can be installed in the horizontal saw blade hole of the handle through the locking bolt. The guide block, which can be parallel to the saw blade and can rotate along with the saw blade and can penetrate through the handle, can be installed in the horizontal guide hole on the bottom surface of the horizontal saw blade hole in the handle. The saw blade can pass through the saw slot at the upper end of a support frame. The support frame, which can move along the saw blade together with the guide block, can be installed at the end of the guide block. The return mechanism, which is installed inside the upper end of the handle and can drive the guide block to move, can be connected to the spring clip at the other end of the guide block. A position limiting device, which can stop movement of the guide block, can be installed at the lower end of the support frame. A hole can be formed outside the horizontal guide hole at the upper end of the handle. A horizontal stop piece can be installed outside the horizontal guide hole.

A folding handsaw pack-pole system is a folding pruning saw that a hunter or woodsman may conveniently carry folded and may carry in a sheath having a belt loop, for trimming branches from thick foliage or wooded area to clear lanes through the woods for shooting. The handle has a pole receiver so that the hunter doesn't have to carry a long extension handle with him into the woods, but rather cuts an appropriately sized branch to slide into the pole receiver to cut high branches that are normally beyond the user's reach without such an extension.

A pole saw includes a long handle with end adapter, a blade-carrying component pivoted to the end adapter for movement between an extended use position and a handle-adjacent storage position, and a saw blade fixed to the blade-carrying component. The end adapter and holding component are cast aluminum for strength and light weight, and are pivoted together about an offset axis so that the blade and blade-carrying component are positioned adjacent the handle in a partially protected position when collapsed for storage. A folding lock mechanism includes an anchor that engages a saw-holding bolt on the blade-carrying component, and a wing nut that can be tightened to secure the sheath on the blade.

A knife connector includes a base, a cover, a clamping device and a connecting stub. The base has a holding side, a knife-holding end, a connecting end opposite to the knife-holding end and a holding cavity. The holding cavity is defined in the holding side and has an opening defined in the knife-holding end. The cover is pivotally connected to the base to close the holding cavity. The clamping device is mounted on the base and holding the cover on the base to close the holding cavity. The connecting stub is mounted on the connecting end of the base and has a non-circular cross section and an engaging recess defined around the connecting stub. Accordingly, the knife connector can detachably and changeably connect a blade body to a handle to fit with different kinds of cutting tools.

A knife connector includes a base, a cover, a clamping device and a connecting stub. The base has a holding side, a knife-holding end, a connecting end opposite to the knife-holding end and a holding cavity. The holding cavity is defined in the holding side and has an opening defined in the knife-holding end. The cover is pivotally connected to the base to close the holding cavity. The clamping device is mounted on the base and holding the cover on the base to close the holding cavity. The connecting stub is mounted on the connecting end of the base and has a non-circular cross section and an engaging recess defined around the connecting stub. Accordingly, the knife connector can detachably and changeably connect a blade body to a handle to fit with different kinds of cutting tools.

A hand saw for use while bow hunting comprises, in combination, a first arrow shaft, a second arrow shaft coaxially secured to a forward end of the first arrow shaft, a handle grip located at a rear end of the first arrow shaft, a blade adapter secured at a forward end of the second arrow shaft, and a saw blade secured to the adapter. Additionally a flashlight adapter is preferably provided which is attachable to a flashlight and can receive the blade adapter so that the saw blade can be selectively attached to either the arrow shafts or a flashlight.

A pole saw includes a long handle with cast end adapter, a cast saw-holding component pivoted to the end adapter for movement between an extended use position and a handle-adjacent storage position, and a saw blade pivoted to the holding component for movement between a blade-use position and a blade-protected position. The end adapter and holding component are cast aluminum for strength and light weight, and are pivoted together about an offset axis so that the blade and blade-holding component are positioned adjacent the handle in a partially protected position that is very compact; thus, no disassembly or separate tools are required. A folding lock mechanism includes a hook and pressure pad that cooperate for secure locking in the extended use position. An adjustable set screw eliminates blade looseness when in the use position.

A hand panel saw able to prevent human skin from being worn off is composed of saw blade, handle with grasp hole, and screws for connecting said saw blade with handle. It features that at least 2 lines of through holes are made on said handle outside said grasp hole.

A utility knife assembly includes a case having a slot in which two blades are received. A resilient plate is secured in the slot and includes two resilient fingers to push the blades out from the slot. A switch unit is connected to the case and selectively activates either one of the two blades to be pivoted out from the slot.

A pole saw includes a long handle with end adapter, a blade-carrying component pivoted to the end adapter for movement between an extended use position and a handle-adjacent storage position, and a saw blade fixed to the blade-carrying component. The end adapter and holding component are cast aluminum for strength and light weight, and are pivoted together about an offset axis so that the blade and blade-carrying component are positioned adjacent the handle in a partially protected position when collapsed for storage. A folding lock mechanism includes an anchor that engages a saw-holding bolt on the blade-carrying component, and a wing nut that can be tightened to secure the sheath on the blade.

An assembly of saw handle and saw member is provided. An end portion of the saw member is inserted into an inserting groove of the saw handle. The saw handle has stopping bars at an inserting portion and a swing arm. The end portion defines an opened hole and a closed hole. When the swing arm is moved to an eject position and not received in a receiving space of a guard portion of the saw handle, the saw member is not blocked by the swing arm and is allowed to be inserted into the inserting groove. After the saw member is inserted into the inserting groove and the swing arm is moved to a fix position, the stopping bars are respectively located in the opened hole and the closed hole, so that the saw member can be assembled with the saw handle in a convenient and rapid manner.

This invention relates to a curved saw, the saw body 1 is curved from the base toward the tip. The concavely arch-shaped side rim of the curved saw body 1 is provided with many saw teeth 2. The cross angle ([alpha]) of a cutting edge 3 as the base side rim of the saw tooth 2 situated at the base of the saw body 1 with a tooth point line 5 joining the tooth points 4 of the saw teeth 2 each other is made larger, while the cross angle ([alpha]) of the cutting edge 3 as the base side rim of the saw tooth 2 situated at the tip of the saw body 1 with a tooth point line 5 joining the tooth points 4 of the saw teeth 2 each other is made smaller. Thereby, the total saw teeth from the base to the tip of the saw body can be utilized, realizing the objective saw, mainly a pruning saw, enabling cutting works to be smoothly performed with a constant force.

The present invention addresses the problem of proving a handsaw configured so that clogging with chips is dramatically eliminated, the teeth can be densely arranged without widening the pitch of the tooth tips, the top cut surface of each of the teeth, which is called a top edge, can have a large area, a reduction in the cutting performance caused by the clogging of chips can be sufficiently prevented, and the cutting performance of the handsaw is significantly improved. The handsaw is formed by arranging saw teeth at a longitudinal side edge (21) of the saw blade (20). The saw teeth are formed as prism-shaped teeth (30) which are configured in such a manner that at least adjacent prism-shaped teeth rise at the same angle (theta) from the edge surface (21a) of the longitudinal side edge (21) of the saw blade (20) to cause the gap (S) between the adjacent prism-shaped teeth to be constant in the direction in which the teeth rise.

The present invention relates to an angle adjustable connecting part for farm equipment and hand tools, which can easily detach a working part of farm equipment and a hand tool from a sack, and can be adjusted at various angles to allow many types of farm equipment to be interchangeably used. The present invention is configured such that: a connecting part is formed on the front end of a working part of farm equipment or a hand tool, a connecting part is also formed on the front end of a sack, and the working part and the sack can be coupled through the connecting parts; the connecting part has a fixing hole formed in the center thereof, and multiple angle adjusting holes are formed concentrically outward from the fixing hole; a fixing hole is formed at the center outward from the connecting part, and a fixing plate is provided having a fixing protrusion that is inserted into the angle adjusting hole formed outward thereon. When a fixing screw is inserted in and fixed to the fixing plate and the fixing hole of the connecting part, the fixing protrusion of the fixing plate is inserted in and fixed to an angle adjusting hole of the connecting part, and after the fixing screw is unscrewed, the connecting part can be turned to fix the working part and the sack at a desired angle.

A saw includes a handle and a blade which is fixed to the handle. The handle includes a recess defined in a side thereof and an illumination device is rotatably connected to the recess of the handle. The illumination device includes a light emitting member and a switch connected thereto. The user may rotate the illumination device to adjust the direction of the light beam from the light emitting member.

An assembly of saw handle and saw member is provided. An end portion of the saw member is inserted into an inserting groove of the saw handle. The saw handle has stopping bars at an inserting portion and a swing arm. The end portion defines an opened hole and a closed hole. When the swing arm is moved to an eject position and not received in a receiving space of a guard portion of the saw handle, the saw member is not blocked by the swing arm and is allowed to be inserted into the inserting groove. After the saw member is inserted into the inserting groove and the swing arm is moved to a fix position, the stopping bars are respectively located in the opened hole and the closed hole, so that the saw member can be assembled with the saw handle in a convenient and rapid manner.

The purpose of the present invention is to provide a blade-replaceable saw in which, even when the width dimension of a handle insertion part is greater than the width dimension of a guide member, thehandle insertion part can be inserted into and engaged with the guide member. The blade-replaceable saw is configured such that: a slit part (8) is provided in the handle insertion part (3) of a sawblade (1), the slit part (8) being configured from a first slit section (6) that is formed inward from a side edge section of the handle insertion part (3), and a second slit section (7) that is formed continuous to the first slit section (6) and formed from a deep end portion (6A) of the first slit section (6) toward a tip side of the handle insertion part (3); and when a slit outer section (9) located outside the slit part (8) of the handle insertion part (3) receives an external force applied inward from the side edge section side, the slit outer section (9) is elastically moved or elastically deformed toward the inside by the slit part (8).