Abstract: In general terms, the present invention relates to a safety valve or a pressure relief valve (PRV) that is developed to be used in combination boilers and similar appliances and utilized for the purpose of controlling or limiting system pressure. Relief valves are generally used as safety devices in systems where fluid pressure is important, and they reduce the system pressure either by discharging fluid from the system or simply by interrupting the fluid conveyance in case of an emergency when there is an increase in pressure. The present invention relates to a pressure relief valve, the rear cover of which is attached to the body by means of a clawed structure and manufactured from entirely recyclable thermoplastic material.

Abstract: A modular component fishing rod system that allows the end user to easily and securely change one or more of the handle portion and rod blank. The system includes a rod blank, rod sleeve assembly and a slide-on handle assembly. The rod sleeve assembly performs at least three functions including: 1) truing up the taper of the fishing rod blank to allow components of the handle assembly to be slid onto the rod blank from the butt end; 2) providing an indexing or key feature which registers with the handle assembly to maintain proper alignment between the handle assembly and rod blank; and 3) providing a method to attach the handle assembly to the rod sleeve.

Abstract: A collet to feed and fasten cylindrical rivets includes an inlet unit that accepts and supports the rivet, a first feeding unit connected from the inlet unit and configured to feed the rivet, a second feeding unit connected to the first feeding unit opposite to the inlet unit and configured to feed the rivet, and an outlet unit that is connected to the second feeding unit opposite to the first feeding unit and supports the rivet that is fed to it. The inlet unit and the first feeding unit have at least two first slots at opposite angles, the second feeding unit and the outlet unit have more of second slots than the first slots, and when the rivet enters the first feeding unit, the second slots are closed by the opening of the first slots.

Abstract: A collet-type mechanism for releasably gripping either an external or internal target surface of a tubular workpiece includes a collet receiver defining a collet receiver contact surface configured as a curved lateral surface of a truncated right circular cone, and a segmented collet assembly comprising a plurality of collet segments. Each collet segment defines a workpiece engagement surface configured for gripping engagement with a workpiece target surface, and a collet segment contact surface configured for at least partial contacting engagement with the collet receiver contact surface. The collet segment contact surface may comprise two axially-contiguous regions, one of which corresponds to a curved lateral surface of either an oblique circular cylinder or a right circular cylinder, and the other of which corresponds to a curved lateral surface of a truncated right circular cone.

Abstract: The invention is a system and a handheld device for use in open or minimally invasive surgical procedures, such as a bone implant fixation procedure. The handheld device is configured to perform various functions during a bone implant fixation procedure, including performing at least one of: penetration of a bone to form a hole or opening for receipt of a screw; neuromonitoring, in cooperation with a neuromonitoring device, of the hole during, or post-, formation of the hole so as to sense any nearby nerves adjacent to the hole that may be in the path of a screw, or otherwise affected, when a screw is placed within the hole; neurostimulation, in cooperation with a neuromonitoring device, of nerves adjacent to the hole during, or post-, formation of the hole; and measuring of a depth of the hole and providing a digital measurement of the depth to assist the surgeon in selecting the appropriate length of screw.

Abstract: A chuck with automatic positioning collet is provided. The chuck includes a rotation member, over which a stationary member is sleeved. A piston is arranged inside the rotation member by means of a slidable sleeve that includes an internal thread screwed to an external thread of a collet. The rotation member includes an elastic piston pin assembly selectively alignable with a positioning groove of the collet. The stationary member is provided with two gas passages through which gas introduced may drive the piston to move in opposite directions so as to move the slidable sleeve and the collet in opposite directions to cause a tapering hole of the rotation member to loop tightly up or release the collet and an object received in the collet and the gas simultaneously drives the elastic piston pin assembly to position the positioning groove of the collet.

Abstract: A bushing assembly for a reciprocating device is provided. The bushing assembly includes a hollow bushing housing, a collet guide member, and an adjuster mechanism. The hollow bushing housing has a substantially cylindrical shape and an angled inner sidewall. The collet guide member is disposed radially inward from and contacts the angled inner sidewall of the hollow bushing housing. The adjuster mechanism contacts a lower surface of the collet guide member and urges the collet guide member along the angled inner sidewall of the hollow bushing housing.

Abstract: A drill limit system includes a holder having drill stops removably coupled thereto and configured to receive a drill bit therethrough, and a platform coupled to the holder and configured to engage a tip end of the drill bits when received through the drill stops, wherein the holder and platform are movable relative to each other so that the position of the drill stops relative to the drill bits may be selectively varied. A method for attaching drill stops to a drill bit includes providing a holder and a platform movable relative to each other, the holder having a plurality of drill stops removably coupled thereto, inserting a plurality of drill bits through respective drill stops, moving the holder and platform relative to each other to select a desired height of the drill stops on the bits, and engaging the drill stops to the drill bits at the selected height.

Abstract: The invention provides a clamping system (1) for a rotary tool (70), for example a milling cutter or drill. The clamping system (1) includes a base element (10), a collet (30) and a clamping nut (50), said clamping nut (50) friction-locking the rotary tool (70) within the base element (10) with the collet (30). In order to avoid a relative rotation of the base element (10) and the collet (30), the clamping system (1) has a form locking anti-twist protection which blocks a rotation of the collet (30) relative to the base element (10).

Abstract: A thread gauge, which allows to reliably know the time for replacement by visual checking and improves the predetermined dimensional accuracy of a thread product has a go-side thread measuring portion extending from one side of a shank portion coaxially with the shank portion or a not-go-side thread measuring portion extending from an other side of the shank portion coaxially with the shank portion, a wear checking gauge line having a predetermined length and a predetermined depth formed on male thread portions and female thread portions formed on the go-side thread measuring portion or the not-go-side thread measuring portion.

Abstract: It is an object of the invention to provide a constituent member of a collet chuck, a collet and a fastening nut as well as a collet chuck capable of reinforcing a holding force of a tool.

Abstract: A miniature drill chuck has a drill chuck housing and a thrust member positioned in the interior for moving clamping jaws into their clamping position during a threading movement of the drill chuck housing onto a machine spindle. The thrust member is longitudinally moveable in a guide bore of the drill chuck housing while being centered circumferentially about its entire stroke. A pair of truncated cone surfaces is provided between the machine spindle and the thrust member, wherein the machine spindle centers the thrust member via the pair of truncated cone surfaces when loading the thrust member.

Abstract: The present invention enhances the lubricating property of the sliding surfaces of a clamp nut and a collet, reduces a friction coefficient, prevents the occurrence of seizure, and enhances durability. Accordingly, it is possible to rotate the clamp nut and the collet without causing vibrations due to imbalance. Moreover, this invention provides a clamp nut that can maintain tool-mounting accuracy for a long period of time even in the case of high-speed rotation, and also provides a collet chuck including such clamp nut. Concerning the clamp nut which is mounted on a collet chuck body for holding tools in the collet and which clamps the collet chuck body and the collet together, at least a part of the clamp nut which comes in contact with the collet is made of oil-bearing metal.

Abstract: A Chucking device comprising a collet with an external taper and a collet holder with a taper socket for the chucking of a rotating part, wherein the taper socket of the collet holder and the external taper of the collet have a taper angle which is smaller than the self-locking angle, and the collet has a head for applying an axial force for pressing it into the holder and for pulling it out of the holder.

Abstract: A tool holding apparatus includes a spindle and a collet nut engaged with a spindle wherein a recess is defined between the spindle and the collet nut. A collet is disposed in the recess and includes a first tapered portion and a second tapered portion spaced from the first tapered portion, wherein the first and second tapered portions form substantially equal angles with respect to a longitudinal center line of the collet.

Abstract: A fastening device for fastening a tool member to a machine tool includes a mouth having an inclined inner peripheral surface, a chuck member received in the mouth and having one or more spring blades and having an inclined outer peripheral surface for engaging with the inclined inner peripheral surface of the mouth, and a shaft received in the chuck member. The spring blades may be forced radially inward to clamp the shaft in the chuck member when the mating inclined peripheral surfaces of the chuck member and of the mouth are moved relative to each other.

Abstract: A device for receiving a tool or support element in a machine tool or spindle has a tool carrier receiving member arranged in a machine tool or spindle and a tool carrier having a tool receiving member for a tool as well as a clamping device for securing the tool carrier in the tool carrier receiving member. The tool carrier has two areas, wherein a first area includes the tool receiving member and wherein a second area is designed to be received in the tool carrier receiving member. The second area includes the clamping device. The two areas are merged with one another in the axial direction of the device by overlapping the areas.

Abstract: A rotary power tool designed to accept a wider range of tool shank diameters, and particularly larger diameters, without any special adapters, including a threaded output spindle with a stepped internal bore including an enlarged counter bore at its end. A one-piece collet having jaw segments, central shank portion, and a base is seated in the spindle bore so the jaw segments are cammed directly by the spindle end, and a collet nut threaded on the spindle, cams the distal ends of the jaw segments against the tool shank. The collet is designed so the larger tool shanks spread the jaws upon collet entry causing the shank portion of the collet to bulge outwardly as the collet jaws are cammed back into parallel relation against the large tool shank. This, in short, enables a smaller size collet to receive and clamp larger diameter tool shanks.

Abstract: A tool bit holder having a collet nut engageable with a rotary and/or reciprocating output shaft having a hollow free end with a collet, having jaws with respective head and shank portions, disposed in the hollow interior of the collet nut and an annular expansion insert member having an aperture of a diameter greater than the diameter of the hollow free end of the tool output shaft through which the shank portion of the collet jaws extend, with the expansion insert member having a proximal end engageable with the free end of the output shaft and a distal end engageable with the heads of the collet jaws, provides improved capacity for the tool bit holder to accommodate a greater range of tool bit sizes.

Abstract: A clamping chuck with a chuck body, a conical receptacle for a collet chuck provided therein, a tension sleeve extending over the collet chuck, and a clamping nut disposed on the chuck body, which can be screwed together with the tension sleeve, wherein a bore, with which openings (12a,) in the clamping nut are aligned, radially extends through the chuck body, and wherein clamping pieces are radially displaceable in the bore.

Abstract: A quick release chuck device has a body member defining an axially extending bore for receipt of a tool shank. At least a portion of the bore is defined by a plurality of radially compressible and axially extending gripping segments. The gripping segments are equally spaced and defined by axial slots extending from a front face of the body member. At least two axially extending and aligned recesses are defined on each of the gripping segments. An operating member is coaxial with and surrounds at least the gripping segments of the body member. The operating member defines a varying radial width channel with the recesses formed on the outside of the gripping segments. The operating member is axially movable relative to the body member. Actuating elements, such as balls, are disposed within the varying radial width channels.

Abstract: A tool holder for small hand tools such as screw driver sets, drill sets, etc., which tool holder has external threads near one end which accommodate a compression sleeve which fits over and compresses a tool holding collet/chuck. Within the tool holder is a female hex shaped receptacle which is sized to accommodate a male hex shaft of the collet/chuck. The hex shaped receptacle in the tool holder and the hex shafts of the collet/chuck's act to prevent the collet/chuck's from turning when the tool is subjected to high levels of torque and also allow collet/chuck to be easily interchanged so that a single tool holder can be used to accommodate tools with a variety of shaft cross-sectional shapes such as round, square, hexagonal, etc.

Abstract: A collet chuck 1 having a chuck body 3, a collet 11 disposed in the body 3, a nose ring 23 for radially compressing the collet 11, and a locknut 30 for axially moving the nose ring 23 into compressive engagement with the collet 11 is provided with a bearing assembly 45 disposed between the nose ring 23 and the collet 11 which loads compressive forces in a direction which is advantageously parallel to the axis of rotation A of the chuck. Both the locknut 30 and the nose ring 23 include flange portions 27, 43 that confront each other with opposing surfaces 47, 49 that are complementary in shape to the spherical profile of the ball bearings 50 and which traverse a line L parallel to the axis of rotation A of the chuck. The collet chuck 1 further includes O-rings 61, 65 disposed between the nose ring 23 and the locknut 30both in front of and behind the ball bearings 50 for sealing the bearing assembly 45 against dust and debris and retaining lubricant.

Abstract: A collet is designed for a tool having a cylindrical shank and a square drive at the rearward end of the cylindrical shank. The collet includes a collet body having a plurality of radially compressible collet segments. An axial bore is formed in the collet body for receiving the cylindrical shank of the tool. The tool is secured in the axial bore by collapsing the collet segments around the cylindrical shank of the tool. A grip-forming slot extends through a midsection of the collet body and communicates with the axial bore so as to receive the square drive of the tool when the tool is inserted into the axial bore. A pair of gripping surfaces are formed on respective collet segments on opposite sides of the grip-forming slot for gripping opposed surfaces of the square drive when the collet segments are radially collapsed to prevent radial movement of the tool.

Abstract: A chuck for a tool, a workpiece and the like has a chuck body having an inner receptacle, a clamping device accommodated in the inner receptacle and having axially projecting spring regions, the clamping device having two ends which are axially supported and being axially compressible for clamping an element in an interior of the clamping device and an element for applying a compressing force to the clamping device at a front end of the chuck body.

Abstract: A clamping arrangement includes taper sleeves which are movable axially towards each other and upon movement in a specific direction open outward radially, so that an outer component can be clamped on a shaft. The axial displacement of the taper sleeves towards each other takes place by means of a screw sleeve with threads of differing pitch, engaging in corresponding threads on the ends of the taper sleeves lying outside a clamping region. The clamping can be produced or released by turning the screw sleeve in one direction or the other.

Abstract: The collect (20) is composed of a foundation body (21) and a closer (22). The foundation body (21) can be connected to the tightening device of a machine tool. The closer (22) is divided into individual clamping jaws (38) which are connected to one another permanently by means of intermediate members made of a rubber-elastic compound. The foundation body (21) and the closer (22) are coupled to one another by means of a coupling device (24) which is positive in the axial direction and nonpositive in the radial direction. The coupling device (24) includes projections (42) arranged ont he closer part (22) and protruding radially outwards and a matching number of openings (48) on the foundtion body (21).

Abstract: A hand-held collet for holding a tool or the like within displaceable jaw pieces which are mounted on sprung rods accommodated within a hollow tubular handle.