The present invention surrounds to a ratchet apparatus, system and use thereof. The invention is presented to provide additional mechanical advantage and added angular engagement of a ratcheting wrench. In particular the present invention provides increased torque and angular engagement within a compact space without requiring an extended handle, wherein an extended handle reduces portability and further restricts access and movement within confined spaces.

A method for manufacturing an operation rod of a wrench assembly for disassembling a fan clutch, including following steps of: preparing a rod material; fixing the rod material on a forging mold; carrying out a forging process to produce a semi-finished head; carrying out a cutout process, cutting the remainder structure out of the semi-finished head; obtaining a finished product of a head portion, the head portion including two wing plates and a shaft which are integrally formed.

A tool for controlling a controlled element of a height adjustable foot of a furnishing item and the like includes an engagement portion and a handle coupled to the engagement portion and having two arms shaped to embrace an outer edge of the height-adjustable foot and keep the engagement portion associated laterally with the adjustable foot. The engagement portion is arranged between the two arms and includes a toothing with a toothed section that extends over a rounded area of the surface between the two arms of the handle so as to engage at least one toothing on the controlled element of the adjustable foot. The teeth of the toothed section and the teeth of the at least one toothing of the controlled element are asymmetrical and angled, enveloping, curved teeth that follow the circular shape of the controlled element.

A tool for controlling a controlled element of a height adjustable foot of a furnishing item and the like includes an engagement portion and a handle coupled to the engagement portion and having two arms shaped to embrace an outer edge of the height-adjustable foot and keep the engagement portion associated laterally with the adjustable foot. The engagement portion is arranged between the two arms and includes a toothing with a toothed section that extends over a rounded area of the surface between the two arms of the handle so as to engage at least one toothing on the controlled element of the adjustable foot. The teeth of the toothed section and the teeth of the at least one toothing of the controlled element are asymmetrical and angled, enveloping, curved teeth that follow the circular shape of the controlled element.

An auto adjustable spanner hand tool system, adjustable drivetrain tool apparatus with auto adjustable spanner feature, and methods of use are presented. The disclosure provides an interchangeable head system for a spin spanner which automatically engages and disengages a target. The interchangeable head system also activates to spin. The system includes a spring loaded ratchet mechanism which allows the pin to rotate both clockwise and counterclockwise to engage and disengage smoothly. Furthermore, the ratchet assembly is designed to accommodate standard nut dimensions at particular locking points, when needed.

A method for manufacturing an operation rod of a wrench assembly for disassembling a fan clutch, including following steps of: preparing a rod material; fixing the rod material on a forging mold; carrying out a forging process to produce a semi-finished head; carrying out a cutout process, cutting the remainder structure out of the semi-finished head; obtaining a finished product of a head portion, the head portion including two wing plates and a shaft which are integrally formed.

A wrench assembly includes first and second wrench members, and a switch, having an engagement member and a proximal extremity, mounted to the first wrench member. The switch moves between engaging and disengaging positions of the engagement member. The proximal extremity is undepressed in the engagement member engaging position, and is depressed in the engagement member disengaging position. The switch moves from the engagement member engaging position to the engagement member disengaging position, when the second wrench member is partially installed into the first wrench member. The switch moves from the engagement member disengaging position to the engagement member engaging position releasably engaging the engagement member to the complemental engagement member disabling the second wrench member from being withdrawn from the first wrench member, when the engagement member registers with the complemental engagement member when the second wrench member is installed into the first wrench member.

A wrench assembly includes first and second wrench members, and a switch, having an engagement member and a proximal extremity, mounted to the first wrench member. The switch moves between engaging and disengaging positions of the engagement member. The proximal extremity is undepressed in the engagement member engaging position, and is depressed in the engagement member disengaging position. The switch moves from the engagement member engaging position to the engagement member disengaging position, when the second wrench member is partially installed into the first wrench member. The switch moves from the engagement member disengaging position to the engagement member engaging position releasably engaging the engagement member to the complemental engagement member disabling the second wrench member from being withdrawn from the first wrench member, when the engagement member registers with the complemental engagement member when the second wrench member is installed into the first wrench member.

Various designs for a ratchet mechanism and tools incorporating a ratchet mechanism are described. One embodiment relates to a ratchet with each layer of the gear stack includes teeth rotationally offset from each other increasing the number of circumferentially spaced gear tooth surfaces that are available to engage with the pawl teeth. Another embodiment relates to a ratchet with multiple pawls placed in series such that the pawls are spaced circumferentially around the gear.

A tool for controlling a controlled element of a height adjustable foot of a furnishing item and the like includes an engagement portion and a handle coupled to the engagement portion and having two arms shaped to embrace an outer edge of the height-adjustable foot and keep the engagement portion associated laterally with the adjustable foot. The engagement portion is arranged between the two arms and includes a toothed section that extends over a rounded area of the surface between the two arms of the handle so as to engage radial septa or seats defined in the controlled element and converging toward a central axis of the adjustable foot. The toothed section is shaped as an arched and rounded tooth extending toward one of its free ends in the direction from one arm to the other.