The present disclosure is directed to devices, kits, and methods for treating lumbar spinal stenosis by at least partially decompressing a compressed nerve root. The method can include identifying the compressed nerve root and percutaneously accessing a region of a lamina located adjacent to the compressed nerve root. The method can also include forming a channel through the region of the lamina, wherein the channel can be formed medial to a lateral border of the lamina. Further, the method can include expanding the channel in a lateral direction.

A pneumatic impulse wrench includes a motor, a housing with a pressure air inlet passage, an exhaust air outlet passage, and an air flow control valve provided in the exhaust air outlet passage and including a valve element shiftable between an exhaust air flow restricting position and an exhaust air flow non-restricting position. A rigid contact member is provided to positively define the exhaust air flow restricting position of the valve element, and a bypass passage of a well-defined flow area is provided to let through a limited exhaust air flow as the valve element occupies the flow restricting position in engagement with the contact member.

A pneumatic impulse wrench includes a motor, a housing with a pressure air inlet passage, an exhaust air outlet passage, and an air flow control valve provided in the exhaust air outlet passage and including a valve element shiftable between an exhaust air flow restricting position and an exhaust air flow non-restricting position. A rigid contact member is provided to positively define the exhaust air flow restricting position of the valve element, and a bypass passage of a well-defined flow area is provided to let through a limited exhaust air flow as the valve element occupies the flow restricting position in engagement with the contact member.

A torque socket is provided. The torque socket includes a release mechanism that can be released when a torque thereof reaches a pre-determined value. The torque socket also includes a transmission module. The transmission module includes transmission members and a transmission shaft that are coupled with the release mechanism. The transmission members are cooperated with the release mechanism to determine the transmission shaft transfer torque or not to automatically release the torque,

A tool and methods of use is described. The tool tightens or loosens a fit of torque-limited fittings to respective ports of a fluid-handling device. The tool includes a torque application assembly disposed within a fitting receiving end of a tool body to receive a fitting. The tool body includes a slit between ends to receive a fitting tube. The torque application assembly includes an internal feature and a notch to align with the slit and receive the tube. In both a compressive direction of rotation under a threshold torque and an opposite, decompressive direction of rotation, the internal feature is configured for engagement with a resilient feature of the fitting such that rotation of the torque application assembly causes a fitting rotation. In a compressive direction of rotation at or above the threshold torque, rotation of the torque application assembly fails to cause a fitting rotation.

An electric ratchet wrench includes a driving member rotatably mounted in a body. A pawl device is pivotably mounted to the driving member. A ring gear is rotatably mounted around the driving member. A flexible transmission shaft includes a first end connected to a motor and a second end configured to switch between a meshing state meshed with the ring gear and a disengagement state disengaging from the ring gear. The motor drives the transmission shaft to rotate the driving member. The body can be manually driven to overcome a resistance which is larger than the torque outputted by the motor and which causes a tooth slippage phenomenon between the transmission shaft and the ring gear.

Provided is an apparatus for applying a specific amount of torque, comprising a body, a torque wheel, rotationally affixed to the body, comprising a plurality of teeth around an outer edge and a central spring mechanism affixed to and enclosed within the body, the central spring mechanism, comprising a spring stop and a torque spring, the torque spring comprising a torque spring end wherein the torque spring end engages the plurality of teeth and wherein, in a first rotational direction, the engagement of the torque spring end in the plurality of teeth prevents the torque wheel from rotating with respect to the body below a specified amount of torque and wherein, above the specified amount of torque in a second rotational direction, the torque spring flexes enabling the torque spring end to disengage from the plurality of teeth and enabling the torque wheel to rotate with respect to the body.

Electronic device for measuring the characteristics of fastening devices, comprising a box-shaped body (2) traversed by at least one cylinder (21), rotating with respect to the box-shaped body that transmits the rotary motion received by such a fastening device and a sensor capable of measuring the rotary torque and the rotation angle on said cylinder.

Such a device comprises means for detecting the relative rotation between box-shaped body (2) and rotation driving cylinder (21).

Electronic device for measuring the characteristics of fastening devices, comprising a box-shaped body (2) traversed by at least one cylinder (21), rotating with respect to the box-shaped body that transmits the rotary motion received by such a fastening device and a sensor capable of measuring the rotary torque and the rotation angle on said cylinder.

Such a device comprises means for detecting the relative rotation between box-shaped body (2) and rotation driving cylinder (21).

A torque screwdriver device is provided, including: a housing, including a barrel and a cover coveringly connected with the barrel; an input shaft portion, rotatably assembled with the barrel; an output shaft portion, rotatably assembled with the barrel and including a socket mechanism; a torque clutch mechanism, including a first engaging portion disposed on the input shaft portion and a second engaging portion disposed on the output shaft portion, an elastic preload member biasing one of the first and second engaging portions, and a first bearing mechanism, the first bearing mechanism including a stop member abutted against the housing, a support member and at least one low friction member disposed between the stop member and the support member, at least one of the stop member and the support member being movable relative to the at least one low friction member.