Abstract: A hand tool includes a central shaft extending along an axis and having a threaded section, a tool head sleeved rotatably on the central shaft, a pressing block sleeved movably on the central shaft, an adjusting member threaded to the threaded section of the central shaft and rotatable to move the pressing block on the central shaft, and an indication unit. The indication unit includes a slide slot formed in a handle, an indicating member disposed movably on the handle and having a guiding projection movable within the slide slot, and a revolution number scale disposed on the handle and adjacent to the slide slot. The indicating member is connected to and co-movable with the adjusting member.

Abstract: A ratchet device includes a body, a ratchet wheel unit, and a switching unit. The body has an outer peripheral surface, at least one slide slot formed in the outer peripheral surface, at least one first groove, and at least one second groove. The ratchet wheel unit includes a ratchet wheel sleeved on the body, at least one first pawl member inserted into the first groove, at least one second pawl member inserted into the second groove, and resilient members biasing the first and second pawl members to engage the ratchet wheel. The switching unit is sleeved on the body, and includes a pushing member disposed in the slide slot, and a switching member connected to the pushing member. Through operation of the switching member, the first or second pawl member can be separated from the ratchet wheel.

Abstract: A hand tool includes a tubular casing, a tubular member connected to the tubular casing, a rod body extending through the tubular member into the tubular casing, two collar assemblies surrounded respectively by two oppositely-extending frustoconical urging surface portions of the tubular member and surrounding the rod body, and two resilient members biasing respectively the collar assemblies to abut against the rod body and abut respectively against the urging surface portions to thereby restrain the rod body from moving relative to the tubular casing. When the collar assemblies are moved to be released from the rod body and the urging surface portions, the rod body is permitted to move relative to the tubular casing.

Abstract: A tool handle includes a first handle unit, a joint unit connected rotatably to the first handle unit and formed with a plurality of positioning grooves, a second handle unit connected co-rotatably to the joint unit, and a latch member inserted into the first handle unit and movable between a lock state, where two latching projections of the latch member engage two of the positioning grooves and the first and second handle units are non-rotatable relative to each other, and an unlock state, where the latching projections are disengaged from the two of the positioning grooves and the second handle unit is rotatable about the engaging block to permit adjustment of an orientation of the second handle unit relative to the first handle unit.

Abstract: A ratchet device includes a body, a ratchet wheel unit, and a switching unit. The body has an outer peripheral surface, at least one slide slot formed in the outer peripheral surface, at least one first groove, and at least one second groove. The ratchet wheel unit includes a ratchet wheel sleeved on the body, at least one first pawl member inserted into the first groove, at least one second pawl member inserted into the second groove, and resilient members biasing the first and second pawl members to engage the ratchet wheel. The switching unit is sleeved on the body, and includes a pushing member disposed in the slide slot, and a switching member connected to the pushing member. Through operation of the switching member, the first or second pawl member can be separated from the ratchet wheel.

Abstract: A flexible tool rod device includes an inner rod unit and a sleeve pipe unit. The inner rod unit includes a drive head, a tool head opposite to the drive head, and a flexible connecting member interconnecting the drive and tool heads. The sleeve pipe unit is made of rigid material and includes a first sleeve pipe and a second sleeve pipe. The first sleeve pipe has a first end portion connected fixedly to one of the drive and tool heads. The second sleeve pipe is telescopically connected to the first sleeve pipe, and is movable relative to the first sleeve pipe between a covered position for providing rigidity to the flexible tool rod device, and an uncovered position to allow resilient deformation of the connecting member.

Abstract: A telescopic handle for a hand tool includes a main shank connected to a tool head at a distal end and insertable into an outer sleeve which a user grips. The main shank has a plurality of axially spaced retained regions such that a radially movable retaining member is engageable with a selected one of the retained regions. A key-and-keyway mechanism is disposed to guide axial movement of the outer sleeve and to guard against rotation of the outer sleeve relative to the main shank so as to permit delivery of an appropriate torque to the main shank. An operating member is disposed on and movable axially relative to the outer sleeve to radially move the retaining member.

Abstract: A tool handle includes a first handle unit, a joint unit connected rotatably to the first handle unit and formed with a plurality of positioning grooves, a second handle unit connected co-rotatably to the joint unit, and a latch member inserted into the first handle unit and movable between a lock state, where two latching projections of the latch member engage two of the positioning grooves and the first and second handle units are non-rotatable relative to each other, and an unlock state, where the latching projections are disengaged from the two of the positioning grooves and the second handle unit is rotatable about the engaging block to permit adjustment of an orientation of the second handle unit relative to the first handle unit.

Abstract: A tool handle includes a first handle unit including a first handle body and an engaging block that protrudes obliquely from the first handle body, a joint unit mounted rotatably around the engaging block and formed with an oblong groove, a second handle unit connected co-rotatably with the joint unit, and a latch member mounted movably to the first handle unit and able to switch between a lock state, where the latch member engages the oblong groove and the first and second handle units are non-rotatable relative to each other, and an unlock state, where the latch member is disengaged from the oblong-groove and the second handle unit is rotatable about the engaging block to adjust an orientation of the second handle unit relative to the first handle unit.

Abstract: A telescopic hand tool includes an outer tube, an inner rod and a positioning unit. The outer tube has an inner surface formed with opposite first and second grooves. The inner rod is inserted in and movable relative to the outer tube between retracted and extended positions, and has an outer surface that has a segment confronting the inner surface and formed with a furrow portion. The positioning unit is disposed in the outer tube and includes a positioning block corresponding in position to the furrow portion and a resilient member disposed in the furrow portion for biasing the positioning block toward the inner surface to engage releasably the first and second grooves.

Abstract: A ratchet tool includes a tool head provided with a plurality of ratchet teeth on an inner peripheral surface, a drive body having an outer surrounding surface confronting the ratchet teeth, and a guiding slot for receiving first and second pawls and a biasing member to permit the pawls to be displaced between extending and retracted positions, and an actuator twistable relative to the head and having two inner boundary contours to define two recessed regions to accommodate displaceable engagements of keys of the pawls with the inner boundary contours. The pawl end is configured to extend along an entire axial length of the drive body so as to be fully engaged with the ratchet teeth in the engaging position, thereby permitting transmission of a relatively large torque during rotation of the tool head.

Abstract: A telescopic handle for a hand tool includes a main shank connected to a tool head at a distal end and insertable into an outer sleeve which a user grips. The main shank has a plurality of axially spaced retained regions such that a radially movable retaining member is engageable with a selected one of the retained regions. A key-and-keyway mechanism is disposed to guide axial movement of the outer sleeve and to guard against rotation of the outer sleeve relative to the main shank so as to permit delivery of an appropriate torque to the main shank. An operating member is disposed on and movable axially relative to the outer sleeve to radially move the retaining member.

Abstract: A telescopic hand tool includes a main shank connected to a tool head at one end and inserted into an outer sleeve for gripping by a user. The outer sleeve has an inner surface including a first arcuate region extending along a circumferential line, and a second arcuate region displaced from the first arcuate region, disposed radially outward of the circumferential line, and having low and increased friction areas. A block attachment is disposed on the other end of the main shank, and has an engaging segment engageable interferingly with the increased friction area to prevent rotation of the outer sleeve relative to the main shank.

Abstract: An angle adjustable handle includes a first shank and a second shank coupled with each other by means of a plug extending in a swivel axis from the first shank and a socket fastened to the second shank. The socket has two body halves tightened to each other and having two socket ends that cooperatively define a socket cavity for accommodating the plug so as to permit the socket to be swivelable about the swivel axis between normal and angle-adjusted positions. A spring-loaded latch is disposed in the first shank and movable to engage or disengage from the socket to permit or prevent movement of the socket.

Abstract: An adjustable torque limiting device includes a shank unit composed of first and second shanks coaxially and rotatably connected to each other, a carrier unit mounted between the shanks and having axially facing bearing regions and radially facing detent regions which cooperatively define cavities for receiving detent bodies, respectively, so as to transmit a straining force emanating from the detent regions to the detent bodies, a force transmitting member movably mounted on the shank unit and frictionally engaged with the detent bodies, an adjusting assembly turnable to axially move the force-counteracting member, and a compressible biasing member disposed between the force-counteracting member and the adjusting assembly to exert a preloaded force against the straining force.

Abstract: An angularly accessible head assembly for a torque hand tool includes a drive shank and a head rotatably disposed on a coupling shell about drive and driven axes that intersect with each other by an angle of at least 90 degrees. First, second and third force transmitting members are disposed to couple the drive shank and the head by means of four joint subassemblies, each having a socket wall surface and an orientable portion matingly engaged with each other. A torque exerted upon the drive shank is transmitted to the head through the force transmitting members and the joint subassemblies so as to activate a rotational movement of a threaded connector.

Abstract: A hand tool includes a tool head with an insertion hingedly connected to a pair of lugs of a handle to be rotatable relative thereto, and retained to an angular position by means of a spring-biased ball. The insertion is configured to have a hemispherical segment which includes front and rear segment strips extending circumferentially from an apical area that has a retaining concavity. Each segment strips has a plurality of circumferentially extending retaining grooves. The hemispherical segment further includes left and right cutout surfaces parallel and opposite to each other. By virtue of the hemispherical segment, rotation of the tool head relative to the handle and engagement of the ball in a selected one of the grooves and concavity are smooth and successful.

Abstract: An angle adjustable handle includes a first shank and a second shank coupled with each other by means of a plug extending in a swivel axis from the first shank and a socket fastened to the second shank. The socket has two body halves tightened to each other and having two socket ends that cooperatively define a socket cavity for accommodating the plug so as to permit the socket to be swivelable about the swivel axis between normal and angle-adjusted positions. A spring-loaded latch is disposed in the first shank and movable to engage or disengage from the socket to permit or prevent movement of the socket.

Abstract: A ratchet tool includes a tool head provided with a plurality of ratchet teeth on an inner peripheral surface, a drive body having an outer surrounding surface confronting the ratchet teeth, and a guiding slot for receiving first and second pawls and a biasing member to permit the pawls to be displaced between extending and retracted positions, and an actuator twistable relative to the head and having two inner boundary contours to define two recessed regions to accommodate displaceable engagements of keys of the pawls with the inner boundary contours. The pawl end is configured to extend along an entire axial length of the drive body so as to be fully engaged with the ratchet teeth in the engaging position, thereby permitting transmission of a relatively large torque during rotation of the tool head.

Abstract: An adjustable torque limiting device includes a shank unit composed of first and second shanks coaxially and rotatably connected to each other, a carrier unit mounted between the shanks and having axially facing bearing regions and radially facing detent regions which cooperatively define cavities for receiving detent bodies, respectively, so as to transmit a straining force emanating from the detent regions to the detent bodies, a force transmitting member movably mounted on the shank unit and frictionally engaged with the detent bodies, an adjusting assembly turnable to axially move the force-counteracting member, and a compressible biasing member disposed between the force-counteracting member and the adjusting assembly to exert a preloaded force against the straining force.