A tubular tool includes a tubular first part and a tubular second part. The tubular first part including a first section having an engaging hole defined in the distal end thereof, and a second section having a connection hole defined in the distal end thereof so as to be respectively connected to a driving tool and an object. The tubular second part is rotatably mounted to the first outer periphery of the first section of the first part. At least one lip extending from the inner periphery of the tubular second part. At least one first circular rib extends outward from the first outer periphery of the first section. The at least one lip is engaged with the at least one first circular rib to restrict the second part from separating from the first prat.

A wrench has a roller motion transmission mechanism that changes reciprocating motion of a driving member to unidirectional rotational motion of a driven member. The wrench has a head with a cylindrical inside wall surrounding a body with a plurality of ramps inclined toward the cylindrical inside wall. A wedging member comprising a cylindrical roller engages each ramp and the cylindrical inside wall of the head. A cage anchored to the body retains the wedging members in contiguous locations relative to the ramps and the cylindrical inside wall of the head. Retainers connected to the cage bias all of the wedging members into engagement with the ramps and the cylindrical inside wall of the head.

A reversible ratchet tool includes a cage-type reversing mechanism including a cage member for shifting rollers from their first positions to their second positions. The structure and configuration of the cage member is improved with resilient members for preventing the rollers being stuck unintentionally when the rollers are positioned either in the corresponding first positions or the corresponding second positions, while being capable of maintaining and restricting the rollers upright in place when the rollers are shifted from the corresponding first positions to the corresponding second positions.

The invention relates to a roller wrench comprising: a body with a circular chamber; a driving member being a regular polygonal component capable of rotating in the chamber; and a plurality of rollers installed in the chamber, Each of the rollers is located between a side of the driving member and a peripheral wall of the chamber; one end of each of the rollers is pivotally connected to an end surface of a reversing knob, so that the reversing knob drives the rollers to displace simultaneously. Thereby, the components of the roller wrench can be effectively latched with one another, and a torque value of the roller wrench will not be reduced.

Disclosed herein are devices, systems, and methods of an adjustable crowfoot wrench for use with large format fasteners such as bolts or hydraulic line nuts over 1 inch in size. The adjustable crowfoot wrench includes a base, a translating arm, and a gear. The translating arm include one or more fastener pads and a threaded translating shaft. The gear is configured to threadably engage the threaded translating shaft of the translating arm. The threaded translating shaft is configured to be received by and translate through a translating channel of the base. The base also includes a stationary pad, a drive aperture and gear retaining arms. The gear is retained by the gear retaining arms of the base when the gear is threadably engaged with the translating arm within the base.

A hand tool includes a first driving element, a second driving element and at least one connecting element. The first driving element includes a first driving portion and a first staggered portion. The first driving portion is connected to the first staggered portion integrally. The second driving element does not contact the first driving element and includes a second driving portion and a second staggered portion. The second driving portion is connected to the second staggered portion integrally. The connecting element connects the first staggered portion and the second staggered portion, wherein the connecting element is made of insulating material.

A magnetically assisted direction-changeable roller wrench has a main body, a driving member, a direction changing knob, plural rollers, a magnetic balancing member, and a magnetic positioning unit. The driving member, the rollers, and the direction changing knob are mounted in a head portion of the main body. The magnetic positioning unit includes a first and a second magnetic member located respectively on the driving member and the direction changing knob. The corresponding surfaces of the first and the second magnetic members have the same magnetic polarity, so a predetermined distance can be maintained between the first and the second magnetic members to secure the direction changing knob in position. The direction changing knob can displace each roller into contact with an engaging surface of the corresponding side of the driving member. The magnetic balancing member and the magnetic positioning unit lie in opposite directions to enable balanced magnetic attraction.

A wrench has a head with an inside cylindrical wall surrounding a body with ramps. Cylindrical rollers located between the ramps and the cylindrical wall of the head are moved into wedging positions relative to the ramps and the inside cylindrical wall with permanent magnets located in a cage assembly anchored on the body.

A drive head for a wrench is configured for operation with manually driven members of power-operated devices. The drive head includes at least first and second drive members selectively engageable with such driven members.

A utility tool for operating a utility meter set includes an elongate body member having opposed first and second ends. A regulator cap member is coupled to a first end of the body member and defines an aperture configured to grip a regulator cap of the meter set. The regulator cap member may include first and second portions in communication with one another and configured to loosen multiple regulator cap models, respectively. A service valve member is coupled to the second end of the body member and has an offset wrench head for operating a service valve of the meter set. A pressure adjustment member is coupled to the body member intermediate the opposed ends for adjusting the regulator pressure once the regulator cap is removed. The body member defines one or more bypass apertures having a configuration complementary to that of a bypass plug associated with the meter set.