A metal cutting tool for use in cutting steel plate as found for example in structures such as large petroleum storage tanks and the like is disclosed and consists of a cutting blade positioned in an inverted U-shaped guide which is attached to a two or three ton weight. The tool is elevated by suitable means and dropped so that the inverted U-shaped guide engages the upper edge of a metal plate to be cut.

An impact actuated bakery grid device 10 for producing uniform portions of baked goods wherein the grid device 10 includes a force generating unit 13 operatively associated with a handle member 30 which is connected at widely spaced locations on a grid member 20 for forcibly ejecting the portions of baked goods from within the confines of a plurality of compartments 24 within the grid member 20.

A powered means for simultaneously cutting two seal portions of conventional windshield tracks. An L-shaped blade having both legs with sharpened edges is attached to an elongated frame member having a grasping portion thereof. A force transferring means is adapted to be operatively connected to the elongated frame member and to a powered force supplying means, such as an air hammer or the like. A collar on the frame member prevents movement of the force transferring means towards the blade duri...

The present invention relates to a variable stroke, impact device comprising a rotating cam impeller which includes an elongated first end portion adaptable for attachment to a rotary drive source and further includes a curved cam surface formed on a second end portion. The rotating cam surface interacts with a curved end portion of an impact tool to reciprocate a wedge-shaped portion of the tool into contact with a work surface. The length of the stroke and the reciprocating speed as well as th...

A safety chisel especially adapted to shear bolts having a nut permanently attached thereto, while retaining the sheared bolt and nut assembly within a safety container portion of the chisel.

An end seal seals between an end portion and an operating member moving toward the end portion. The end seal has a seal member mounted on the end portion. A seal lip pressed by sealing fluid pressure to come in contact with the operating member when the operating member comes in contact with the end portion and stops is provided on the seal member.

A chamber seal device is provided to seal a wafer stage chamber assembly to isolate semiconductor substrates, a wafer stage device, and the process of making semiconductor wafers from an atmospheric condition, so that the resulted wafers have an improved quality and meet certain wafer manufacturing specifications. The wafer stage chamber assembly includes a wafer stage chamber, a top wall and a base frame. The wafer stage chamber assembly is supported by an apparatus frame of an exposure apparat...

A guard for a weed trimmer includes an elongated telescoping arm attachable to a trimmer shaft. The arm is biased in an extended position. Pivotally attached to a distal end of the arm is a protector plate for providing a protective barrier between a trimmer head and another object such as a tree trunk, plant or fence. The distance between the plate and trimming head can be selectively varied by pressing the plate against the object.

A self-actuated woodworking tool [T] for one-handed reciprocating operation has a chambered haft [1] and a tool shank [4] carried captively axially within the haft in slidable, reciprocal relationship. A shank portion [5] extending forwardly from the haft has a cutting edge [6]. A haft ferrule [11] precisely orients the shank and so also the cutting edge angularly with respect to the haft. The haft cross-section permits the user to know by tactile feedback the angular orientation of the haft and...

An explosive actuated hand tool for cutting clean holes in sheet material, wherein the explosive force causes a piston to pull a punch toward a die, the material being located between the punch and die. Convenience and safety features include means for arming the firing mechanism by rotation of a locking ring which secures a cartridge in its chamber and means to prevent movement of a firing pin unless a lever has been moved from an OFF position to the ON position.