Abstract: An oil-pressure cylinder in a crushing device is connected to a crushing jaw via a pivot shaft so that the crushing jaw can open and close. The extension of oil-pressure cylinder causes the crushing jaw to close and crush the object to be crushed. Oil-pressure cylinder has a piston with a greater pressure-receiving area on the head side than on the rod side. An acceleration valve serves to switch the extension/retraction operations of the oil-pressure cylinder. During a rod unloaded interval, beginning when the crushing jaw starts to close and ending when the crushing jaw comes into contact with the object to be crushed, the acceleration valve makes communication between a head-side port and a rod-side port in the cylinder continuous, while the oil path from the rod side to a tank is blocked. The oil from the rod side is made to flow to the head side.

Abstract: A shearing machine includes a sickle shaped upper jaw interacting scissors fashion with a generally linear lower jaw. The distal ends of the sickle shape begin shearing from opposite ends of a plate-type object at about the same time, with shearing progressing toward a central point. A transverse member and a return leg form, with the lower jaw, a J-shaped device. The upper jaw slides within the return of the J during the entire cutting operation, thereby overcoming any tendency for jaw spreading between the linear and sickle shaped cutters. A front cutting insert in the transverse member and a return cutting insert in the return leg, interact with a tip of the upper jaw to pierce, and then cut, a plate which is longer than the throat of the shearing machine, thereby enabling shearing of large plates. The initial piercing takes place simultaneously at the tip of the upper jaw and at an upward-directed point on the front cutting insert.

Abstract: A carpet cleaner for cleaning carpets includes a foam generation unit, roller brushes and a heated air drying mechanism. The foam generation unit uses multiple stages of foam generation for creating a very fine foam which is applied to the carpet. A suction device removes excess foam from the carpet after the brushes have gone over the carpet. Finally, heated air is blown across the carpet after the suction device has removed the excess foam. The carpet is cleaned, dried and ready for immediate use.

Abstract: A cutting/crushing device for the demolition of buildings has a pair of jaws that pivot on frame. The jaws are constrained to pivot in synchrony because each jaw remains engaged with a guide pin which substantially prevents relative movement of the two jaws. The guide pin is guided by a slot in the frame, aligned with a plane of symmetry between the two jaws, to prevent it from moving toward or away from either jaw. By guiding the guide pin in this way, frictional binding and wear of the guide pin are minimized. In addition, the shape of the recesses into which the guide pin fits can have smaller tolerances reducing play between the two jaws. Stoppers on the frame press against the rotatable jaws when they are filly opened to prevent any play.

Abstract: A shearing machine includes a generally hexagonal shearing blade and a generally rectangular shearing blade on each of an upper and a lower jaw. The hexagon forms a point at the forward end of the hexagonal shearing blade dividing a main shearing edge from an auxiliary shearing edge. A hexagonal edge at the rear of the hexagonal shearing blade forms a relief edge which unloads shearing forces to permit full shearing force to be directed to the rectangular shearing blade during a final stage of shearing a sheet of material. An end of the rectangle is preferably abutted to a portion of the relief edge, without provision for a gap or clearance therebetween. Embodiments are disclosed in which the shape of the shearing blade is non-hexagonal. In one disclosed embodiment, the shape of the shearing blade is non-polygonal, in that at least one edge is a curve.

Abstract: A concrete crusher has a crushing surface 1a on a stationary lower jaw 1 and it is formed so that its axial cross-section is V-shaped. A main crushing blade 5 is installed on a crushing surface 2a of a movable upper jaw 2 pivoted to the lower jaw and is opposite the lowermost portion of stationary crushing surface 1a. Supporting crushing blades 6 are installed on the upper jaw at opposite sides of the main crushing blade 5 and have shorter blade heights than main crushing blade 5.

Abstract: The shearing machine is designed to surely shear an object to be sheared with less amount of power without causing slips. A plurality of lower shear blades mounted on a lower jaw member are arranged such that the arrangement of the cutting edges forms a convexity curved downward. The front edge portion of each shear blade inwardly protrudes from an adjacent rear edge portion of each forward adjacent shear blade. A plurality of upper shear blades mounted on an upper jaw member are arranged such that the arrangement of the cutting edges forms a convexity curved upward. The front edge portion of each shear blade inwardly protrudes from an adjacent rear edge portion of each forward adjacent shear blade.

Abstract: A plurality of pairs of interengaging shearing blades on upper and lower jaws are maintained at distances and tilt angles from a reference line which separates the shearing into discretely acting zones. The distances and tilt angles produce vertical steps between ends of adjacent pairs of shearing blades relieve shearing forces to direct the shearing forces to other pairs of shearing blades, where the shearing force is needed. All shearing blades are identical and interchangeable, whereby only a single type of shearing blade must be manufactured and stocked. In addition, each of the four corners of each shearing blade is installable in a position for active operation, thereby prolonging the lives of the shearing blades. Longitudinal clearances between adjacent ends of shearing blades reduces shearing forces required as the shearing point passes off the ends of blades into the vertical steps.

Abstract: A shearing machine for steel material adapted to be mounted, as an attachment, on a forward end of an arm of a working machine such as a power shovel is provided. The shearing machine comprises a body of the shearing machine having a longitudinal axis, a pair of upper and lower jaws pivotably supported at a forward end portion of the body of the shearing machine by means of a common shaft for open-close movement relative to one another, a pair of upper and lower shearing blades attached respectively to the upper and lower jaws. The upper and lower shearing blades defining a shearing plane in which shearing action for a steel material proceeds.

Abstract: A double scissors cutter for cutting a workpiece into substantially rectangular pieces is provided which comprises a pair of jaw members adapted to be opened and closed about a pivot shaft. Each of the jaw members includes, attached thereto, a cutting blade on an abutting surface thereof, the cutting blades being of a substantially U-shaped configuration. The cutting blades are arranged to be inter-engaged with each other with one of the cutting blades being positioned within the other of the cutting blades, so that a workpiece positioned between the cutting blades may be cut in a scissors cutting movement of the jaw members to form cutout pieces of a substantially rectangular configuration. Protuberant structure is carried on one of the jaw members and extends beyond a plane in which the cutting edge of the associated cutting blade lies.

Abstract: A universal breaking machine is provided which comprising a pair of movable arms pivotably connected to a support frame for open-close movement, and a hydraulic cylinder for causing the open-close movement of the pair of movable arms. The pair of movable arms are adapted to secure detachably, at the opposite, forward end surfaces thereof, a set of or a pair of tool rests for long cutter having a long cutter thereon, tool rests for short cutter having, at the rearward end thereof, a short cutter of a length smaller than that of the long cutter, and having a crusher at the forward end thereof, or smashing blocks having a plurality of large protrusions. A secondary breaking attachment having a plurality of small protrusions thereon may be removably attached, as desired, to the opposite, forward-most surfaces of the pair of movable arms.

Abstract: Shearing blades are attached to a lower jaw and an upper jaw which are arranged to be opened and closed in a crossing manner. The lower leading blade 24 and the lower trailing blade 25, both attached to the lower jaw 4, are arranged to form a substantially V-shaped configuration and in a staggered fashion with respect to the shearing plane. The upper leading blade 30 and the upper trailing blade, both attached to the upper jaw 5, are arranged to form a substantially inverted V-shaped configuration and in a staggered fashion with respect to the shearing plane. At least one offset 26 and at least one gap 27 are provided between the lower leading blade 24 and the lower trailing blade 25, while at least one offset 32 and at least one gap 33 are provided between the upper leading blade 30 and the upper trailing blade 31.

Abstract: Breaking equipment comprising a mounting bracket that is attached to an arm of a power shovel for vertical pivotal movement, a holder frame mounted on the mounting bracket for swivel movement, a hydraulic motor attached to the mounting bracket for rotatably and reversibly driving the holder frame or a swivel break mechanism which is used in place of the hydraulic motor for restricting swivel movement of the holder frame, a pair of pivot arms of a symmetrically L-shaped configuration attached at their mid points to the holder frame by means of pivot axes, the pivot axes being separated apart a predetermined distance H from one another so as to satisfy the equations; a=<b and H=<2h, wherein, a is a distance from the pivot point to the forward end of each of the pivot arms, b is a distances from the pivot point to the rearward end of each of the pivot arms, and h is a distance from the blade edge vertically to the line connecting the pivot point and the forward point of the application, a hydraulic cylinde

Abstract: The object of the invention is to provide an attachment heavy duty shear of reduced weight. This shear has a single-row upper jaw and a single-row lower jaw, with the upper jaw being driven by a built-in hydraulic cylinder to open and close with respect to the lower jaw. The forward end of the lower jaw has a 7-configured guide member for precluding a lateral displacement of the upper jaw in shearing. This construction provides for reduced overall weight and positive grip and shearing.

Abstract: The present invention offers a steel-material shearing machine which nips steel materials after self adjusting to an optimum condition and shears all kinds of steel materials.

Abstract: A reinforcing steel shear including a stationary lower jaw and a movable upper jaw, the upper jaw being divided into two segments which can be bolted together in alternative positions to change the maximum allowable degree of jaw opening. This adjustable jaw opening feature makes the shear useful for various shearing load sizes.

Abstract: The present invention provides a concrete crusher comprising an upper jaw and a lower jaw which are connected to each other through a pivot pin and adapted to be opened and closed by a hydraulic cylinder, the lower jaw having a plurality of longitudinal cutters extending perpendicular to the pivot pin and arranged in the form of a fork, the upper jaw having a large rough cutter extending perpendicular to the pivot pin, the lower jaw further having a plurality of cross cutter bars arranged in a grate-like pattern avoiding the position of descent of the large rough cutter, the upper jaw further having a surfacing plate member facing the lower jaw and having a plurality of cross cutter bars corresponding to the cross cutter bars of the lower jaw, with the large rough cutter interposed between rows of the cross cutter bars of the upper jaw.

Abstract: A shearing machine is provided. The machine comprises a lower stationary jaw detachably mounted on one end of an arm of a working machine for rotatable and tiltable movement, the lower stationary jaw having attached thereto a plurality of shearing blades, an upper movable jaw having a plurality of shearing blades adapted to be opened and closed in a scissors-like manner relative to the shearing blades of the lower stationary jaw so as to shear an article to be sheared, and a hydraulic cylinder for pivotally moving the upper movable jaw. The forward-end shearing blade of the lower stationary jaw and the forward-end shearing blade of the upper movable jaw are arranged in a staggered or angled manner relative to their respective adjacent shearing blades of the lower and upper jaws, respectively, so that the forward-end shearing blades of the lower and upper jaws, respectively, may be first engaged with each other, when moved in a vertical direction.

Abstract: The present invention provides a scissor-action reinforcement cutter comprising a lower jaw and an upper jaw which is of smaller profile than the lower jaw, a first and a second shearing cutter means dismountably secured to each of opposed inner lateral surfaces of the upper and lower jaws in a bent formation in the longitudinal direction of the jaw, and a hydraulic cylinder operatively associated with the jaws, the lower jaw being provided with a through-opening in a forward part thereof to accept a foreard end portion of the upper jaw in such a manner that the first shearing cutter means of the upper and upper jaws intersect each other to grip a work to be cut, the lower jaw being provided with a land series configured generally in the shape of the capital letter L around the through-opening, the shearing cutter means being disposed along the long lateral side of the land series, and a clearance being provided between the short side of the land series which is opposite to the side of the lower jaw on which