Abstract: A workpiece clamping device able to clamp a first workpiece and a second workpiece placed on the first workpiece. The workpiece clamping device includes a receiving base on which the first workpiece is to be placed, a first clamping mechanism for clamping the first workpiece, and a second clamping mechanism for clamping a second workpiece placed on the first workpiece. The first clamping mechanism has a first clamp section and a second clamp section, which are provided on the receiving base so as to open and close. The second clamping mechanism has a third clamp section and a fourth clamp section, which are provided on the receiving base so as to open and close, to retain the second workpiece at a predetermined position with respect to the first workpiece.

Abstract: A clamp for mounting a structure on a support. The clamp includes a fixed jaw, a base, and a moveable thruster plate between the fixed jaw and the base. The clamp includes a thruster cylinder configured to be rotatably received through the clamp body and having threads that engage a screw so that when the thruster cylinder rotates, the screw is advanced or retracted to move the thruster plate into and out of engagement with the support. A knob is used to rotate the thruster cylinder. The clamp includes a friction washer or collet located between the thruster cylinder and the clamp body. The clamp is configured so that when the thruster plate engages the support, further axial movement of the screw is prevented and further rotation of the knob and thruster cylinder compresses the friction washer or collet.

Abstract: A grounding clamp (10, 210) is provided for use with an overhead electrical conductor (12) and is operated by a user via a shotgun stick or other elongate stick or pole. The grounding damp (10) includes a pair of damp jaws (16, 18; 216,218) that, in one embodiment (10), are biased towards a closed position by at least one spring (20,22) and that are driven between open and closed positions via a cam mechanism (24) in response to the user applying a torque force to the clamp (10) with the shotgun stick or other elongate stick or pole. In another embodiment, a ground clamp (210) includes a tightening mechanism (220) configured to tighten a pair of jaws (216,218), and a ratchet mechanism (222) configured to allow the tightening mechanism (220) to be translated relative to the jaw (216) to any of a plurality of predetermined, linearly spaced, fixed positions to adjust the spacing between the jaws (216,218).

Abstract: A tool support incorporates height adjustment and locking features in common components. A pivoting door is used to control the engagement of a height adjustment threaded shaft with the bearing flange of the power tool, with the position of the pivoting door controlled by a manual actuator. In one position the manual actuator allows the door to pivot outward to disengage the height adjustment shaft from the bearing flange. In a second position the manual actuator moves the door to engage the height adjustment shaft with the bearing flange to permit “micro” height adjustment by rotation of the height adjustment shaft. In a third position the manual actuator presses the door into the height adjustment shaft to effectively lock the shaft in position.

Abstract: A multifunction clamp and jack system having a generally C-shaped main body with an elongate threaded rod with a top end configured to receive an open end wrench, a socket of a socket or ratchet wrench, a male square drive member of a ratchet wrench or a non-ratcheting breaker bar, the drive member of an electric or air impact wrench or a removable handle member, the bottom end of the threaded rod configured to receive selected workpiece engaging rotary attachments, the male square drive member of a ratchet wrench or electric or air impact wrench. The main body may be supported in an upright vertical position by front and rear base support members allowing it to be free standing. A plurality of interchangeable workpiece engaging attachments are provided for clamping, holding, or lifting variously shaped workpieces or objects.

Abstract: A method for manufacturing a rotary physical shielding purifier, comprising the following steps: (1) respectively placing an outer rim, spokes and a central clamp base in an outer rim groove, spoke grooves and a central hole, and pressing a pressing die on the spokes; (2) using a welder to weld the contact parts between the spokes and the outer rim; (3) installing a central clamp gland on the central clamp base; and (4) separating the pressing die from a clamping die, and taking the finished product out.

Abstract: Vises utilizing a threaded screw and nut to translate rotary motion of the screw into linear relative movement of vise components. The nut may be a half-nut urged into contact with the screw by a cam that may be operated by a lever located near the handle for turning the screw. A tail vise embodiment may be mounted to the underside of a workbench without signification bench modification and positions the screw near the front edge of the bench top. A front vise embodiment may include a screw cover to protect workpieces from contact with the screw.

Abstract: A quick release vise includes a first and second jaw moveable relative to the first jaw, and a threaded shaft rotatably fixed to the second jaw. A shaft receiver is fixed relative to the first jaw and includes a boss and a boss cover that is moveable relative to the boss. The boss and the boss cover have channels which cooperatively define an at least partially threaded shaft-receiving bore. The boss cover is moveable between a first position wherein the threads of the shaft engage threads within the shaft-receiving bore, and a second position wherein the threads of the shaft are disengaged from the threads within the shaft-receiving bore.

Abstract: A vise quick-release structure for a miter saw includes a base frame and at least one clamp. The clamp can be operated to move to and fro on the base frame, having pillars. The base frame has through holes each having portions having different widths. The pillars are inserted into the portions of the through holes respectively, whereby the clamp can only be forced to move to and fro in the portions of the through holes, such that the clamp can be quickly detached and installed with respect to the base frame.

Abstract: A cantilever clamping device capable of clamping work pieces of variable sizes and shape is equipped with a quick release button at its fixed arm to release the threaded rod and hence the work piece. The Quick Release Cantilever Clamp utilizes a fixed arm and a movable arm with floating pads to clamp the work piece. Clamping action is achieved by turning the threaded rod, one end of which is connected to the movable arm and the other end is attached with a turning handle. Both the fixed arm and the movable arm are designed to have clamping teeth on the curved inner edges to clamp large size cylindrical work pieces and the floating pads are for smaller size cylindrical work pieces and work pieces of different shape and sizes. The fixed arm is equipped with two holes for attaching the optional base block to mount the clamp on a work surface.

Abstract: A device (20) having a pair of jaws (22, 23) cooperating with a pair of threaded rods (24, 25) and which displace equally from a midpoint (36) of device (20) along threaded rods (24, 25). A spirally-wound rod (40) with sets (41, 42) of keyways rides in sets (50, 51) of keys positioned in jaws (22, 23). A center plate (44) for the rods (24, 25, 40) maintains them at a midpoint (36) for device (20). Sliding assemblies (60, 94) lock and unlock barrel nuts (71, etc.) in the jaws (22, 23) from threaded rods (24, 25). Different senses of threads for threaded rods (24, 25) extend to each side of rod (40). In another embodiment, a push handle (116) directly actuates the ‘quarter-turn’ threads in bores (122) of barrel nuts (115) into and out of engagement with threaded rods (121).

Abstract: An adjustable C-clamp which includes a generally C-shaped frame fitted with parallel bottom and top clamp seats and threadibly receiving a clamp cylinder at the top clamp seat. A slotted cylinder is secured in the clamp cylinder typically by means of an allen screw, and a clamp rod slidably disposed in the slotted cylinder is fitted with a clamp rod pin. A clamp nut typically attached to one end of the clamp rod faces the bottom clamp seat across the expanse of the clamp frame. The clamp rod pin is designed to traverse a pair of parallel, diametrically-opposed longitudinal cylinder slots in the slotted cylinder to facilitate slidably adjusting the clamp rod in the slotted cylinder and quickly positioning the clamp nut at a selected spacing from the bottom clamp seat.

Abstract: A clamp having a first leg, a second lega and a base connecting the first and second leg together. An anvil on the first leg and an opening in the second leg. A threaded bolt having threads extending through the opening. A striker head at one end of the threaded bolt which is opposite to and faces the anvil. A control box in the second leg communicating with the opening. A control block mounted within the control box. The control block having teeth extending therefrom which face the threads in the threaded bolt. A control mechanism is provided for moving the control block from a position in which its teeth engage and mesh with the threads on the threaded bolt to a position in which its teeth are disengaged from the threads on the threaded bolt.

Abstract: An adjustable clamping device is provided for clamping/shaping work pieces of various dimensions and may be applied for straightening beams, joist, bearers, etc., squaring house frames, positioning form work, or maintaining work pieces in position. The device includes a first clamping member, a second clamping member and an elongate threaded member on which the first and second members are located and arranged for continuous adjustment of relative positions therealong. The second member is fixedly or adjustably located on the elongate member. The first member has cooperating thread engagement arrangement movable between a released position at which the first member is slidingly positional along the elongate member and an engaged position at which the second member cannot slide along the elongate member but is positional by rotating the engagement arrangement in meshing engagement with the elongate member.

Abstract: A clamping device including a generally C-shaped frame having first and second ends. The first end of the C-shaped frame is uniquely provided with a first through bore and a second angularly extending bore. The device further includes an elongated threaded rod having an external thread and being telescopically movable within the through bore. A novel control member having a rack-like upper surface is disposed within the second bore of the C-clamp frame for movement into and out of the engagement with the threaded rod in response to manual force exerted on the control member and also in response to forces exerted on the out-board end of the threaded rod urging it in a direction toward engagement with the work piece.

Abstract: A vise assembly and a method of manufacture therefor includes a threaded feed screw rod having a clamp member at one end thereof and a manually graspable handle at the other end thereof. The feed screw rod is rotatably mounted in a vise mount. The vise mount includes a frame mount that includes a pair of laterally extending wing portions and a concave portion between the wing portions in which the feed screw rod is received. On the frame mount are included a pair of stepped frame members, each including a first portion fixed to a respective wing portion of the frame mount, and a second portion bent substantially orthogonal to the first portion thereof to define side portions on either side of the concave portion of the frame mount, the feed screw rod being further disposed therebetween. A vise lock handle is pivotably mounted between the second portions of the pair of stepped frame portions.

Abstract: A vise includes a fixed body mounted to a working table. The fixed body includes a compartment defined therein, a longitudinal bore extending therethrough and partially communicating with the compartment, and a transverse bore defined in two lateral sides thereof and communicating with the compartment. A shaft is pivotally mounted in the longitudinal bore and includes a reduced eccentric section. A positioning block is mounted in the compartment of the fixed body and includes a hole in alignment with the transverse bore. An adjusting screw rod is extended through the transverse bore of the fixed body and the hole of the positioning block. The adjusting screw rod includes a first end to which an operative handle is attached and a second end to which a movable jaw is fixedly attached.

Abstract: A removable attachment for use with a hand-held tool is disclosed. The tool comprises a housing and a cutting blade mounted therein for continuous reciprocating movement during operation. The attachment comprises a work piece receiving member pivotally mounted to the tool housing. An adjustable clamping member is pivotally mounted to the work piece receiving member. An adjuster, movable between an operable and a non-operable position, is operably connected to the clamping member for adjusting the clamping member so as to clamp a work piece positioned on the work piece receiving member for operation thereon by the cutting blade. A quick release mechanism comprising a sliding member, movable between a first position and a second position, is provided for quickly moving the adjuster between its operable and non-operable positions.

Abstract: A hand screw clamp includes first and second jaws and a pair of threaded rods, each having a handle for manual rotation. Two first couplers are mounted to the first jaw and coupled to the threaded rods, and two releasable couplers are mounted to the second jaw and coupled to the threaded rods. The releasable couplers each include a threaded portion engageable with the threaded rods and a slidable portion sized to accommodate sliding movement of the threaded rods. A push plate is movably mounted to the second jaw and engaged with both of the releasable couplers. This push plate is movable between a first position, in which both of the threaded portions are engaged with the rods and manual rotation of the handles moves the second jaw along the threaded rods, and a second position, in which both of the threaded portions are disengaged from the threaded rods and the threaded rods are free to slide past the slidable portions without rotation of the threaded rods.

Abstract: A vise includes: a vise body, a stationary vise jaw secured to the vise body, a movable vise jaw operatively moving in cooperation with the stationary vise jaw as driven by a screw, a pair of half nut portions formed on a pair of shear-like clamping handles which are operatively closed to form a combined nut engageable with the screw by a clutch, or opened to disengage the two half nut portions from the screw for fast movement of the movable vise jaw for quickly clamping a work piece between the movable jaw and the stationary jaw.

Abstract: A multiple-purpose vice for wood working includes a lead screw and two guide bars slidingly defined by two bench clamps on a bench, two center-rest clamping jaws mounted on two jaw bases slidingly inserted with the lead screw and the two guide bars for clamping flat-surface work piece, two universal clamping jaws rotatably mounted on the jaw bases for clamping irregular-shaped work piece and an outside-span clamping base clamped on the bench beyond the span between the two bench clamps for clamping larger work piece not allowed to be clamped within the span of two bench clamps.

Abstract: The c-clamp includes a C-shaped body and a screw which can adjustably penetrate through an end of the C-shaped body to clamp or release an object placed between a free end of the screw and the other end of the C-shaped body, a controlling member mounted pivotally with respect to the C-shaped body and provided with a threaded surface which can be rotated pivotally to engage or disengage with the screw, whereby one can determine a fast operation mode or a normal operation mode of the c-clamp.

Abstract: A rapid acting C-clamp is provided. A housing in the base of the C-clamp has a generally semi-cylindrical wall and an internal arcuate rib therein. The C-clamp has a threaded spindle extending through the housing, and a nut member in the housing is provided with a threadless bore through which the spindle extends for rapid advancement. The nut member also has a partially offset and partially threaded bore which is selectively engageable with the threaded spindle for threaded advancement of the spindle. The external surface of the nut is comprised of two semi-cylindrical portions overlapping so as to provide definite lines of demarcation between the portions. A friction member in the nut is resiliently pressed against the threads of the spindle to cause the nut to turn with the spindle in either direction.

Abstract: A clamping device comprises a first jaw member and a second jaw member. A screw has a screw spindle rotatably mounted on the first jaw member. A half nut is mounted on the second jaw member. A cam operatively connects the screw to the half nut so that the half nut is engaged with the screw or disengaged from the screw by rotation of the screw.