A retention-extraction device is provided for a removable card in a chassis. The device includes an actuation rod having a cam slot, the actuation rod configured to provide linear movement along the length of the actuation rod, and an extraction lever operatively connected to a proximal end of the actuation rod and pivotally secured to the chassis. The device also includes a bell crank with a cam follower that is configured to ride in the cam slot and a latch hook that pivots between an open and closed position based on the motion of the bell crank. The linear movement of the actuation rod causes the extraction lever to apply a force to a portion of the card and causes the latch hook to pivot to an open position to allow removal of the card.

A method for securing and removing modular elements employing latches is disclosed. A modular element may include a chassis body supporting electronic components. The body is in communication with a latch and a control member of the modular element. The modular element is removable from or secured to an enclosure using the latch. The latch may engage the enclosure and may remain engaged by being secured by interfacing with a catch of an arm of the control member. By connecting the arm to the control body with a living hinge, the living hinge may urge the catch into a detent of the latch to secure the latch and keep the modular element secured to the enclosure. The latch may be disengaged from the control member by applying a disengagement force to remove the catch from the detent. In this manner, the modular element is efficiently secured and removed from the enclosure.

A removal device includes a wrench part, a handle part, and a thrust control apparatus. The wrench part and the handle part are in a split structure. The wrench part is rotatably connected to a daughter-board panel, and the wrench part is rotatably connected to the handle part. The wrench part includes a bayonet end and a wrench connecting end. A bayonet is provided on the bayonet end, and the bayonet is clamped on the subrack. The handle part includes a handle connecting end and a handle end. A thrust control apparatus is disposed at a junction between the wrench connecting end and the handle connecting end. The thrust control apparatus is configured to restrict motion of the handle part relative to the wrench part, and control maximum thrust when force is applied to the handle end.

Modular elements employing latches with flexure bearings are disclosed. A modular element may include a chassis body supporting electronic components. The body is in communication with a latch and a control member of the modular element. The modular element is removable from or secured to an enclosure using the latch. The latch may engage the enclosure and may remain engaged by being secured by interfacing with a catch of an arm of the control member. By connecting the arm to the control body with a flexure bearing, the flexure bearing may urge the catch into a detent of the latch to secure the latch and keep the modular element secured to the enclosure. The latch may be disengaged from the control member by removing the catch from the detent. In this manner, the modular element is efficiently secured and removed from the enclosure.

A remote access pull rig for opening a fuse associated with a power distribution system is provided. The remote access pull rig includes a base adapted to be coupled to the fuse and a first leg coupled to the base. The first leg includes a first clamp. The remote access pull rig also includes a second leg coupled to the base. The first leg and the second leg extend along a longitudinal axis of the remote access pull rig, and the second leg including a second clamp. The remote access pull rig includes an arm coupled to the base. The arm extends along an axis transverse to the longitudinal axis and includes a third clamp.

A tool for installation and removal of a connector of a gas-insulated switchgear termination includes a housing defining an operation chamber therein, a mounting assembly selectively disposed in the operation chamber of the housing and adapted for securely installing a sleeve member of a gas-insulated switchgear termination on a conical connector member of the gas-insulated switchgear termination or removing the sleeve member securely sleeved on the conical connector member from the conical connector member, an actuator assembly adapted for actuating motion of the mounting assembly, and a friction reducing assembly adapted for reducing friction and resistance occurring during the motion of the mounting assembly.

Apparatus for replacing a suspension insulator on a tower having a davit arm supporting an attached insulator and a conductor shoe attaching an energized conductor to the insulator lower end including a non-conductive board longer than and mounted to the tower below the davit arm, struts extending between the board and the tower, and a movable slider mounted on the board, the slider supporting a jack and a conductor lifting bar attached to the jack. Without contacting any energized components, a lineman moves the slider and operates the jack to lift and support the energized components, detaches the shoe from the insulator, moves the energized components to a remote position on the board, detaches and replaces the insulator while it is supported by a helicopter, moves the slider and operates the jack to lift the shoe into alignment with the insulator and attaches the shoe to the insulator.

The assisting tool for a connector includes a mounting member able to be mounted in a first housing having a first connector able to mate with a second connector in a second housing, and an operating member able to rotate with respect to the mounting member. Here, the operating member has a lever portion, the operating member is mounted in the first housing, and the lever portion contacts the second housing and applies pressure to the second housing in the direction releasing the mated first connector and second connector when the operating member is rotated while the first connector is mated with the second connector.