A jack for installing a mine stopping panel includes an extendible post and a press for extending the extendible post. The press can have a lever movable between an actuated position and a non-actuated position and operative to extend the post as it moves toward the actuated position and retract the post as it moves toward the non-actuated position. A yieldable biaser yields when the post is extended to extend the mine stopping panel and the mine stopping panel engages a mine surface with sufficient force to crush a stopping seal and anchor the stopping panel. The press can comprise an over-center toggle linkage.

The present invention relates to a jack stand. The jack stand includes a base. A post, including composite material, extends from the base. The jack stand also includes a top for topping the post and for engaging with a load. Advantageously, the post may be lightweight (typically less than 12 kg) enabling the jack stand to be conveniently moved by a single person without exposing the person to significant risk of injury. The jack stand may be moved as a whole, or in parts.

The present invention relates to a jack stand. The jack stand includes a base. A post, including composite material, extends from the base. The jack stand also includes a top for topping the post and for engaging with a load. Advantageously, the post may be lightweight (typically less than 12 kg) enabling the jack stand to be conveniently moved by a single person without exposing the person to significant risk of injury. The jack stand may be moved as a whole, or in parts.

A jack (1), which is extensible, comprising: a first tubular body (5), a second tubular body (30) slidably associated with the first tubular body (5) and movable along a predetermined longitudinal direction (A), a third tubular body (95) slidably associated with the second tubular body (30) and movable along the longitudinal direction (A), a base (115) for support associated with an end (105) of the third tubular body (95) distal from the second tubular body (30), characterized in that it comprises an automatic safety device (145) provided with a lockbolt (150) movable between a first position, wherein it allows relative sliding between the third tubular body (95) and the second tubular body (30), and a second position wherein it prevents the third tubular body (95) from sliding relative to the second tubular body (30).

A tool for removing, from a set concrete wall, a concrete form of a type having a discontinuous structure is provided. The tool comprises a lever arm, comprising an engagement portion and a grasping portion. The engagement portion is positioned near one end of the lever arm, and the grasping portion is positioned near an opposite end of the lever arm. An engagement member is secured to the engagement portion. The engagement member is configured to engage the discontinuous structure. A pivoting member is mounted on the lever arm proximate the engagement portion. The pivoting member defines a pivot point around which the lever arm may rotate, whereby the engagement member will apply force to the discontinuous structure tending to pull the concrete form away from the set concrete wall when the engagement portion of the lever arm is pulled away from the set concrete wall when the engagement member is in engagement with the discontinuous structure.

A lever device for lifting an object off the ground includes a lever member having a distal end that is positionable immediately adjacent a bottom end of the object. The lever device also includes a grip member that is operable with the lever member to lift the object off the ground. The grip member is adjustable relative to the lever member to accommodate a size of the object being lifted off the ground. The grip member includes a toothed or hooked end that grips an upper surface of the object to be lifted off the ground. The lever device further includes a handle that is graspable by a user to impart a lever force to the grip member and the lever member and thereby lift the object off the ground.

According to the present disclosure, a projector lift is provided to raise and lower a projector from the ceiling. The projector lift includes a ceiling mount normally coupled to the ceiling, a projector mount supporting the projector, a lift assembly configured to raise and lower the second mount and projector, and a stabilizer extending between the ceiling and projector mounts.

According to the present disclosure, a projector lift is provided to raise and lower a projector from the ceiling. The projector lift includes a ceiling mount normally coupled to the ceiling, a projector mount supporting the projector, a lift assembly configured to raise and lower the second mount and projector, and a stabilizer extending between the ceiling and projector mounts.

An apparatus for partially supporting a vehicle is provided especially for a vehicle having a very limited area on its underside within which to safely apply an upward force, including vehicles with a small distance between the bottom of the chassis and the ground such as a sports car which allows the user to position a lifting jack under the vehicle at the proper access jack point for engagement of the lifting a portion of the vehicle, and lifting the jack and vehicle portion upwardly to a desired height. The legs of the jack stand can be temporarily inserted into a support member engaging the vehicle and the jack. The jack stand includes a horizontal support member with bottom facing open ends telescopically connected to a pair of rigid legs and each of the legs are telescopically attached to supporting bases using locking pins. Once the jack stand is installed, the lifting jack can be removed.

A lifting device, in particular for lifting and lowering loads, vehicles or similar, having a vertical lifting column, having a support arranged on the lifting column, which is guided by a guide on the lifting column and is able to be driven vertically along the lifting column, having a drive device for lifting and lowering the support and a load receiver arranged on the support, wherein the load receiver is able to be driven over and has a drive-on region, a support region and a drive-off region which are arranged in a row along a mutual axis in the drive-over direction and the load receiver has a holding arm outside of the support region and outside of the drive-over direction of the drive-on region or drive-off region.