A sealed manhole clamp securing a manhole cover to a weld ring, including a lever assembly, the lever assembly having a lever arm and a cam, a pivot bolt, the pivot bolt having a cylindrical upper portion, and a lower portion, the lower bolt portion threadedly engages upwardly within the cylindrical upper portion of the pivot bolt, the cylindrical upper portion being pivotally pinned to the lever arm, the lower bolt portion being pivotally mounted to a seal ring, wherein since the lower bolt portion threadedly engages within the cylindrical upper portion, the entrance of any debris, dust, or moisture is prevented from entering the region of this threaded engagement of the pivot bolt components.

A clamp mount and workpiece alignment apparatus is provided. Clamp including a workpiece alignment apparatus is provided. A method of clamping is provided. The clamp mount and workpiece alignment apparatus is used to mount to a support surface of a workpiece support and for positioning at least one workpiece relative to the clamp while the workpiece is supported on the support surface is provided. The apparatus includes a base, a base mount, a workpiece alignment guide, a clamp mount and an adjustable interface between the base and workpiece alignment guide.

A clamping apparatus includes a shaft; a base body that is adjustable to different positions, e.g., heights, along the shaft; a clamping leg arranged to pivot into a first clamping position and a second clamping position; an arm that includes, and extends between, a first end portion connected to the base body and a second end portion connected to the clamping leg; and a handle configured to be moved (a) into a first position that locks the position of the base body relative to the shaft and provides a clamping force to the clamping leg, and (b) into a second position in which the base body is free to be shifted into different positions along the shaft, where moving the handle into the second position releases the clamping force.

A multipurpose woodworker's clamping and spreading apparatus consisting of an elongated support bar component and a pair of elongated crossbar components held together by the respective vertically inclined and horizontally inclined sleeving elements of each of a pair of a two-way adjustable bar holder components with each crossbar holding, as well, one of each of a pair of adjustable workholder components via the horizontally inclined sleeving member of each and with each workholder component featuring an externally threaded holding bolt threadably held within the bolt holder thereof welded to the sleeving member and with the ball shaped end portion of a small rod extension from the base of the bolt, rotatably holding a shoeholder element, in turn holding a shoe element, the sleeving member portion of which features sleeving for such holding and the base member portion of which serves to hold work for clamping or spreading.

A clamp for use with a cutting machine, the clamp comprising: a clamp frame; a low profile clamp head operatively connected to the clamp frame, wherein the clamp head has a clamping surface for pressing on a work surface of a work piece to hold said work piece; and a fixing element, operatively connectable to the clamp frame, for providing a clamping force to the clamp head by fixing the clamp to a support base for the work piece. In embodiments, the clamp head may have a low profile clamp head, made of plastic to prevent damage to a cutting bit.

The inventive technology, in at least one embodiment, may be described as a door leaf handler comprising: a stationary support; a rotatable frame established substantially above said stationary support; and wheels configured to allow rotation of said rotatable frame about a frame rotation axis, wherein said rotatable frame comprises at least one hinge, and door leaf securement rails, and is openable and closeable at said at least one hinge along a rotatable frame opening axis. An installer can install hardware on a door leaf secured in the rotatable frame when the installer is in a first position, and then, in order for that installer to be able to install door hardware on an opposite side of the door from that same position, the installer can rotate the rotatable frame, with door secured in it, 180 . Locks and rotational stops, inter alia, can facilitate operation.

A compressing apparatus has a compressing jig and a pressing device. The compressing jig has a lower compressing assembly and an upper compressing assembly. The lower compressing assembly has a lower mount with at least one pitching plate and at least one limiting set. Each one of the at least one limiting set has multiple poles disposed around a corresponding pitching plate. Each one of the multiple poles has a top end higher than the corresponding pitching plate and a limiting indention disposed at the top end with a supporting portion disposed at a same height with the corresponding pitching plate. The upper compressing assembly has at least one clamping plate respectively aligned with the at least one pitching plate and being movable up and down. The pressing device has a base with a receiving space to receive the upper compressing assembly.

A multipurpose woodworker's clamping and spreading apparatus consisting of an elongated support bar component and a pair of elongated crossbar components held together by the respective vertically inclined and horizontally inclined sleeving elements of each of a pair of a two-way adjustable bar holder components with each crossbar holding, as well, one of each of a pair of adjustable workholder components via the horizontally inclined sleeving member of each and with each workholder component featuring an externally threaded holding bolt threadably held within the bolt holder thereof welded to the sleeving member and with the ball shaped end portion of a small rod extension from the base of the bolt, rotatably holding a shoeholder element, in turn holding a shoe element, the sleeving member portion of which features sleeving for such holding and the base member portion of which serves to hold work for clamping or spreading.

A sealed manhole clamp securing a manhole cover to a weld ring, including a lever assembly, the lever assembly having a lever arm and a cam, a pivot bolt, the pivot bolt having a cylindrical upper portion, and a lower portion, the lower bolt portion threadedly engages upwardly within the cylindrical upper portion of the pivot bolt, the cylindrical upper portion being pivotally pinned to the lever arm, the lower bolt portion being pivotally mounted to a seal ring, wherein since the lower bolt portion threadedly engages within the cylindrical upper portion, the entrance of any debris, dust, or moisture is prevented from entering the region of this threaded engagement of the pivot bolt components.

Provided is a clamping apparatus for a plate, comprising a holding body at which a bolt is arranged for entering into an opening of the plate, a clamping rail which is linearly displaceable relative to the holding body along a displacement axis, and a pressure piece which is arranged or formed at the clamping rail, wherein the clamping rail is guided for linear displacement on a guide element which is movably supported on the holding body, and wherein the guide element is supported for height movement such that a height distance of the pressure piece to the bolt and/or to the holding body is dependent on a position of the guide element relative to the holding body, wherein the height distance is transverse to the displacement axis of the clamping rail.