Abstract: A drilling machine for boring holes in a slab having a hole formed therein includes a main frame to which a drill gang assembly is rotatably and telescopingly mounted. The drill gang assembly includes a drill support frame supporting a plurality of drills in parallel spaced alignment. The drill gang assembly is mounted on a mast which may be rotated three hundred and sixty degrees relative to the main frame about a vertical axis up to at least one hundred and eighty degrees. The mast slides laterally relative to the main frame and the wheels supporting the main frame telescope laterally so the wheels can be supported on an adjacent lane or shoulder when the drill gang assembly is supported over a hole extending the width of a lane of a road forming by the slab.

Abstract: A machine for boring holes into a slab includes a plurality of milling bits mounted on a distal end of a rotatable carrier and a coring bit slidably connected to the carrier such that the coring bit rotates with the rotating carrier and is slidable axially relative to the carrier. The coring bit cuts a relatively smooth bore into the solid medium whereas the milling bits create a bore with a relatively rough finish. An actuator engages the coring bit to adjust the depth of cut of the coring bit relative to the milling assembly depending on the desired finish of the hole to be bored. An undercut assembly is mounted on the carrier and selectively operable to form an undercut in the slab at the bottom of the hole so that a cured patch of material poured into the hole is restrained from working loose from the hole.

Abstract: A drilling machine for boring holes in a slab having a hole formed therein includes a main frame to which a drill gang assembly is rotatably and telescopingly mounted. The drill gang assembly includes a drill support frame supporting a plurality of drills in parallel spaced alignment. The drill gang assembly is mounted on a mast which may be rotated three hundred and sixty degrees relative to the main frame about a vertical axis up to at least one hundred and eighty degrees. The mast slides laterally relative to the main frame and the wheels supporting the main frame telescope laterally so the wheels can be supported on an adjacent lane or shoulder when the drill gang assembly is supported over a hole extending the width of a lane of a road forming by the slab.

Abstract: A drilling machine for boring holes in a surface includes a main frame to which a drill gang assembly is rotatably and telescopingly mounted. The drill gang assembly includes a drill support frame supporting a plurality of drills in parallel spaced alignment. The drill gang assembly is mounted on a mast which may be rotated relative to the main frame about a vertical axis up to at least one hundred and eighty degrees. The drill gang assembly is also pivotally mounted relative to the mast to permit pivoting of the drill support frame and attached drills about a horizontal axis.

Abstract: An attachment is pivotally connected to a compact loader and operable to level uncured concrete. A base of the attachment is removably securable to the loader and a horizontal roller support is pivotally connected to the base on a first side thereof and pivotal about a vertical pivot axis. A screed roller is suspended from the roller support and driven by a drive motor which may be mounted in the tube forming the roller. The roller support and attached screed roller pivot between a stowed position extending along a side of the loader, generally parallel to the direction of travel, and an extended position in which the roller support and screed roller extend up to approximately ninety degrees to the side of the loader. Pivot bearings are preferably included on both sides of the base so that the roller support may be pivotally mounted on either side.

Abstract: A concrete finishing machine includes a mobile frame supported above the slab on front and rear wheels with at least one screed roller and a plurality of vibrators are suspended from the frame between the front and rear wheels. The front and rear wheels are rotatable at least ninety degrees between a longitudinally directed traveling orientation and a laterally directed concrete finishing orientation. The front and rear wheels are driven and steerable so that the mobile frame may travel longitudinally down a lane of a road, and then upon pivoting of the wheels, move laterally over a hole in an adjacent lane having uncured concrete to be finished by the finishing machine.

Abstract: A machine for making cuts through and boring holes into a paved slab includes a pair of saw guide tracks with circular saws mounted thereon for linear movement in parallel spaced relationship. The tracks and saws are mounted on a laterally expandable support frame which is rotatably suspended from a main frame for adjusting the spacing between cuts. The saw guide tracks are suspended from the laterally expandable saw and track support frame by vertically telescoping legs operable to raise and lower the guide tracks and saws supported thereon relative to the paved slab. Drills are mounted on a drill support assembly that telescopes laterally and vertically and which is rotatable about a vertical axis to permit adjustment to the positioning of the drills for boring holes in the slab.

Abstract: A concrete finishing machine includes a mobile frame supported above the slab on front and rear wheels with at least one screed roller and a plurality of vibrators are suspended from the frame between the front and rear wheels. The front and rear wheels are rotatable at least ninety degrees between a longitudinally directed traveling orientation and a laterally directed concrete finishing orientation. The front and rear wheels are driven and steerable so that the mobile frame may travel longitudinally down a lane of a road, and then upon pivoting of the wheels, move laterally over a hole in an adjacent lane having uncured concrete to be finished by the finishing machine.

Abstract: A machine for making cuts through and boring holes into a paved slab includes a pair of saw guide tracks with circular saws mounted thereon for linear movement in parallel spaced relationship. The tracks and saws are mounted on a laterally expandable support frame which is rotatably suspended from a main frame for adjusting the spacing between cuts. The saw guide tracks are suspended from the laterally expandable saw and track support frame by vertically telescoping legs operable to raise and lower the guide tracks and saws supported thereon relative to the paved slab. Drills are mounted on a drill support assembly that telescopes laterally and vertically and which is rotatable about a vertical axis to permit adjustment to the positioning of the drills for boring holes in the slab.

Abstract: A slab jack assembly for raising a fragmented slab from between sections of a concrete slab from which the fragmented slab is cut comprises a planar support positionable on top of the fragmented slab. Jacks are mounted on opposite sides of the planar support to engage an upper surface of the concrete slab. Securement pins mounted on the planar support are insertable into holes bored in the plurality of fragments in the fragmented slab and expandable within the holes to secure the fragments to the planar support. The first and second jacks are then operable to lift the planar support and fragments upward relative to the concrete slab.

Abstract: A slab jack assembly for raising a fragmented slab from between sections of a concrete slab from which the fragmented slab is cut comprises a planar support positionable on top of the fragmented slab. Jacks are mounted on opposite sides of the planar support to engage an upper surface of the concrete slab. Securement pins mounted on the planar support are insertable into holes bored in the plurality of fragments in the fragmented slab and expandable within the holes to secure the fragments to the planar support. The first and second jacks are then operable to lift the planar support and fragments upward relative to the concrete slab.

Abstract: Some embodiments of the present invention provide an apparatus for viewing the operating panel of an electronic device, such as a printer, scanner, copy machine, facsimile machine, multi-function device and the like, wherein the apparatus is adapted to allow a person to view the operating panel from a line of sight that extends from an elevation lower than an elevation of the operating panel. The apparatus can reflect and/or refract an image of the operating panel to place it within the line of sight of the person, and can use one or more mirrors and/or prisms to perform this function.

Abstract: The method is comprised of the following steps:implanting arsenic ions through a thin screen oxide layer in the regions of a P type silicon substrate where subcollectors are to be formed, at a dose less than 2.10.sup.16 at/cm.sup.2, partially etching said screen oxide layer to remove the upper portion, containing contaminating ions exposing to an oxygen ambiant to approximately reconstitute original thickness of the screen oxide layer and then annealing in an inert atmosphere, the substrate, to heal damages and distribute arsenic atoms in the substrate. It has been discovered that the step of reconstituting the original thickness of the screen oxide layer in an oxygen ambient, has the unexpected effect of permitting the subsequent growth of an absolutely defect free epitaxial layer.