Abstract: A wrench includes a handle, a head extending from the handle and having a hole for rotatably receiving a drive member, and a web defined between the handle and the head. The web includes a side and a compartment communicated with the hole of the head. An opening is defined in the side of the web and communicated with the compartment. A pawl is slidably received in the compartment and includes a recessed portion. A switching member has a first end for manual operation and a second end extending through the opening of the web into the recessed portion of the pawl. The recessed portion of the pawl and the second end of the switching member are so configured that the switching member is not moved when the pawl moves as a result of free rotation of the wrench.

Abstract: A mobile bead breaker (100) may be provided comprising a pair of conjoined housings (102, 104). In a first of such housings (104) may be the control and drive mechanisms of the present invention including a pump, hydraulic ram (118), a vertical guide plate (114) and the apparatus' controls. In the second of such housings (102) may be located a supporting wall (122) and for smaller tires a positioning rod (126) for locating and then maintaining the tire/rim assembly in a stationary vertical position for engagement by the bead breaker mechanism. The bead breaker mechanism, additionally located within the second housing (102), may be a spider assembly (200) comprising a plurality of legs (202) equally spaced about a central hub (206). The central hub (206) of such spider assembly (200) may be mounted to the hydraulic ram (118). When the ram (118) is activated, the spider assembly (200) moves toward and engages the tire/rim assembly about the bead of the tire to break the rim/bead seal.

Abstract: A multi-purpose opener for removing a closure from a variety of containers has a sleeve having a first end with an opening for receiving a screw cap within the sleeve. The sleeve has an internal wall with one or more projections for engaging the screw cap, and a second end with a slot having a blade for engaging a bottle cap. A handle is integral with the sleeve and extends radically there from. The distal end of the handle has a taper for engaging under the lift tab of drink can. A claw for engaging a ring pull tab of a can is integral with the sleeve and extends tangentially from the sleeve diametrically opposite the handle.

Abstract: A chain link remover includes a base having an opening formed by an anvil and having a screw hole for threading with a threaded shaft which has a link ejector rod to remove the chain link pin from the chain. A support device is disposed in the base to support the chain in the opening of the base, and to retain the chain between the anvil and the threaded shaft, and thus to allow the chain link pin to be easily disengaged or removed from the chain without holding by the users. The support device includes two pawls to engage with and to support the chain between the anvil and the threaded shaft, with such as resiliences.

Abstract: A screw and driver system includes a range of screws and a driver. Each screw has a head having a driving recess in its surface for engagement by the driver. The recess of larger screws in the range have a plurality of superimposed recess tiers of decreasing size with increasing depth from said surface. Each tier has substantially parallel driving surfaces and torque applied to the driver is transmitted to the screw through the driving surfaces. At least one tier of at least smaller screws in the range has a rib. Engagement of the driver with the recess causes deformation of rib, and hence creation of an interference fit of the driver in the recess.

Abstract: The removal tool is used in connection with a locking nut and bolt system. The bolt thread has a plurality of notches generally longitudinally spaced in a predetermined pattern. The locking unit or element carries one or more tines. The tine has a distal tine end adapted to latch onto the lock face of the notch on the bolt and, when the distal tine end is not disposed in one or more notches, the tine end moves on the bolt thread crest. When the distal tine end is in the notch or notches, the lock face of the notch prevents counter-rotational movement of the bolt with respect to the nut when the distal tine end abuts the lock face. The locking unit supports the tine and may be cylindrical, rectangular or on a perpendicular support face normal to a radial plane through the axial centerline of the nut thread. The locking unit may be on a nut insert or may be carried on the leg of a U, J or S-shaped clip.

Abstract: For assembling at least two parts of an object with one another, a bolt having a thread is introduced into the parts, a washer is placed on a free end of the bolt, a nut is threadingly connected to the free end of the bolt so as to abut against the washer, a power tool is placed so as to turn the nut by a rotatable element of the power tool connected to the nut to tighten or loosen the bolt and to apply a non-rotatable element of the power tool to the washer to absorb reaction force and the body of the washer is provided with a breaking point such that when the nut is turned and turns the bolt, the washer stops the bolt from turning and thereby the nut creates a pull on the bolt which elongates the bolt in an axial direction and applies to the body of the washer an axial force which breaks a portion of the body of the washer and allows a portion of the body of the washer to be pulled axially when the bolt elongates.

Abstract: A convertible retaining ring pliers has a pivot, first and second jaws and first and second handles rotatably secured about the pivot. A pair of transfer pins is slidably disposed for selective movement in the first and second jaws and the first and second handles for establishing alternative operating positions enabling the jaws to move inwardly as the handles move inwardly and allowing the jaws to move outwardly as the handles inwardly. A switching mechanism is mounted to the handles and pivot for providing simultaneous shifting of the transfer pins in the jaws of the handles. The switching mechanism includes first and second flexing spring plates which are mounted on opposite ends of the pivot and disposed on opposite external surfaces of the handles. Each of the spring plates includes a pair of boss pins engageable with opposite ends of the transfer pins.

Abstract: A ratchet wheel mounting structure comprises a ratchet wheel mounted in a box of a wrench body and meshed with a toothed stop block in said box, and a retainer ring mounted in between said box and said ratchet wheel to secure said ratchet wheel to said box, said ratchet wheel having teeth arranged around the periphery thereof, a locating block at one side of the ratchet wheel, and a locating groove being formed around the periphery of said locating block for positioning said retainer ring. Each tooth of said ratchet wheel is chamfered at one end thereof far away from the locating block; and a reinforcing bevel is provided in the valley between roots of another ends of each two adjacent teeth of said ratchet wheel adjacent to said locating block. Or each tooth is chamfered at two ends and thus no bevel slop is formed.

Abstract: A bit for removing a broken fastener comprises a tip from which extend two or more notches separated by scraping surfaces formed from two-sided frusto-conically-shaped regions. The scraping surfaces are bounded on one side by a cutting edge and on the other side by a non-cutting edge and are configured to cut into the fastener when the bit is rotated in a direction opposite to the fastener's direction of engagement. Specific embodiments include configurations where the cutting edges extend at different angles with respect to the bit axis and where the scraping surfaces comprise a plurality of serrations.

Abstract: A fastener guide (6) for use in a power-operated drive in device (4), particularly of a stand-up tool (2), having a guide path (16) in which a plurality of fasteners (14) can be received and which has a device-side opening (18) and a free opening (20), the guide path (16) being curved toward the device-side opening (18) proceeding from the free opening (20). The fastener guide (6) can be mounted on the drive in device (4) in a detachable manner by connection means, and the guide path (16) has a fall-out prevention device (26, 48) at each of the two openings (18, 20).

Abstract: A trim-type hammer having a recess in its elongated handle housing a stud finder secured within by a lip having an impact member to mark the location on a sheetrocked wall overlying a stud beneath.

Abstract: A selective one-way bit-driving apparatus includes a shaft for connection with a handle, a bit receiver including a plurality of teeth formed on an internal face, two one-way drivers pivotally connected with the shaft and each formed with a plurality of teeth for engagement with the teeth of the bit receiver and a switch installed on the shaft for causing the engagement of the teeth of at least one of the one-way drivers with the teeth of the bit receiver.

Abstract: The present invention relates to an improved split-tip screwdriver. The split-tip screwdriver of the present invention prevents the movable sleeve from detaching from the remainder of the screwdriver by incorporating a retention rim on both the sleeve and the handle. The split-tip screwdriver also provides an extended portion on the sleeve that covers the elongated members and insulates the elongated members when the sleeve is extended from the handle to minimize the possibility of a user inadvertently being shocked by electricity conducted through the elongated members.

Abstract: In order to provide a space-saving inexpensive screw tightening apparatus by forming the same apparatus as a whole to a rational simple construction, a screw tightening apparatus M is provided with a robot 5 for retaining a nut runner 1, which is adapted to tighten a recess bolt 8, with respect to a work 10, and support members 2, 3, 4 for supporting the nut runner 1 so that the nut runner 1 can be displaced in three axes which orthogonally cross one another. An air cylinder bearing the weight of the nut runner 1 or support members 2, 3, 4 are connected to the support member 2.

Abstract: In a selective one-way wrench, a handle projects from an annular head. The annular head defines a first space and a second space communicated with the first space. A gear is rotationally put in the first space and includes a toothed external face. A direction controller is put in the second space and includes two pawls and a spring installed between the pawls each including a rod formed thereon and a toothed face. A driver is put rotationally in the second space and includes two fingers selective one of which contacts the rod of selective one of the pawls so as to bring the toothed face of the selected pawl into engagement with the toothed external face of the gear. A direction switch is installed rotationally on the annular head and operably connected with the driver.

Abstract: A torquing device for assisting in the removal of a lid from a container. The device comprises a housing having a first engagement surface. Moveably mounted to the housing is an engagement member having a second engagement surface. The first and second engagement surfaces collectively define a slot which is sized and configured to accommodate at least a portion of the lid. Cooperatively engaged to the housing and to the engagement member is a biasing member for normally maintaining the engagement member in a release position. The engagement member is selectively moveable from the release position to a gripping position as a result of the rotation of the lid subsequent to the advancement thereof into the slot. The movement of the engagement member to the gripping position facilitates the rigid capture of the lid between the first and second engagement surfaces, thus allowing locking or unlocking torque to be applied thereto.

Abstract: A tool and method for joining together two sections of plastic coated rigid metal pipe without applying pressure to the plastic coating to avoid damage thereto. The tool has a tubular body with an internally threaded open end which is loosely threaded onto one end of a section of pipe. A friction plate mounted on a threaded shaft within the body is advanced into pressure engagement with the peripheral end edge of the pipe to rotate the pipe through the frictional contact therebetween upon rotation of the body by a tool. The friction plate is loosely mounted on the shaft to compensate for irregularities in the end edge of the pipe. Rotating the tubular body in the opposite direction will disengage the friction plate from contacting the end edge of the pipe without rotating the pipe.

Abstract: A precision screwdriver having a turning head includes an accommodation space provided inside a longitudinally extended handle of the precision screwdriver, the accommodation space being open at a wider diameter end of the handle, a holder in the accommodation space, a plurality of ribs each with a locking trough formed in the holder to hold a plurality of tips. A pivot is formed on one end of the holder and an opposing end has a fender formed thereon. The pivot is pivoted to the center of the turning head. A circular protrusion and a groove are provided at where the turning head contacts the accommodation space of the handle with both connected to each other for free pivoting and the turning head functioning as a support axle for the handle. The holder is exposed by pulling the turning head linked to the pivot, and is restricted in the circular trough of the accommodation space by the fender.

Abstract: An adjustable wrench comprising a moveable jaw, a stationary jaw, and a worm gear driving the moveable jaw. The worm gear is, in turn, meshed with a rack of the moveable jaw and is driven by a reversible servomotor. Activation of the servomotor produces linear reciprocating motion of the moveable jaw. The adjustable wrench further includes a positioning device provided for limiting a travel of the moveable jaw in at least one direction away from or toward the stationary jaw. Preferably, the positioning device includes a first preset stop for limiting a travel of the moveable jaw in the direction toward the stationary jaw to define an inward limit of travel of the moveable jaw and a second preset stop for limiting a travel of the moveable jaw the directions away from the stationary jaw to define an outward limit of travel of the moveable jaw.