Abstract: A lighting fixture assembly includes a lighting fixture having a mounting member, a pair of end plates, an elongated lamp and an elongated lens, and a pair of dust covers fittable over opposite ends of the lighting fixture. Each end plate is mounted to one of the opposite end of the mounting member and is substantially comprised of a first material having a first coefficient of thermal expansion. The lamp is mounted adjacent to the mounting member and extends between the end plates and has opposite ends disposed adjacent to the end plates. The lens is mounted adjacent to the mounting member and extends between the end plates and has opposite ends disposed adjacent to the end plates. The lens together with the mounting member and end plates substantially encloses the lamp.

Abstract: An arrangement for limiting the rotational movement or displacement of a swivel unit mounting a lamphead. More particularly, disclosed is a rotation limiting arrangement including cooperating stop elements for controlling the rotational displacement of a lamphead employed in an exit sign or the like within predetermined angularly defined boundaries, so as to thereby prevent the lamphead from at least partially obscuring the legend of the exit sign.

Abstract: An arrangement for assembling a lamphead and a panel and securing them together to allow for full adjustability in the rotationally adjusted positioning of the lamphead relative to the panel through the utilization of a minimum amount of fastener elements and without the necessity for having to remove any panels or fasteners. A disk element has a center hole with a radially inwardly extending protuberance or key, and with a plurality of closely spaced small holes or apertures formed in the disk and annularly arranged about the center keyed hole in a predetermined circular pattern.

Abstract: An illuminated sign having a housing with a back wall and a peripheral wall extending around the back wall to form an illuminating recess. The housing further having a top and a bottom and a bracket located within the recess, adjacent the top. An illuminating device is also positioned within the recess. A cover is hingedly coupled to the bottom of the housing by a hinge for pivotal movement relative to the housing between a closed position and an open position. The cover has an inner side facing the housing and an oppositely facing outer side. A transparent, protective shield is coupled directly to the outer side of the cover. A first tamper-resistant fastener is located adjacent the top of the housing and couples together the bracket and the cover for selectively securing the cover in the closed position.

Abstract: A unitary valve assembly for a fluid-activated, percussive paving breaker includes a valve chest having an outer sidewall forming an internal valve chamber, a sidewall within the internal chamber forming a valve bore, a reciprocal valve within the valve bore and a bottom plate permanently fastened to the outer sidewall. The inner sidewall forms a first annular, upstanding sealing seat for the valve, and the bottom plate forms a second annular, upstanding sealing seat for the valve. Passageways through the valve assembly are positioned so as to connect with high and low pressure chambers of a paving breaker, when the valve assembly is inserted into the paving breaker. For weight reduction, the valve assembly is made of acetal resin.

Abstract: A system for lubricating and reciprocating a piston in a fluid-activated, percussive paving breaker includes a unitary valve assembly positioned within a bore of a rear portion of a tool housing, the valve assembly having an oil reservoir for lubricating the piston. The valve assembly is retained in place by a combination of a throttle lever and a backhead plate bolted to the rear tool housing.

Abstract: A system for lubricating and reciprocating a piston in a fluid-activated, percussive paving breaker includes a unitary valve assembly positioned within a bore of a rear portion of a tool housing, the valve assembly having an oil reservoir for lubricating the piston. The valve assembly is retained in place by a combination of a throttle lever and a backhead plate bolted to the rear tool housing.

Abstract: A throttle lever for a paving breaker having rear housing bore. A valve assembly housing plug is removably inserted into the bore. A backhead plate retains the valve assembly housing plug in the bore. An elongated throttle lever has a first end pivotally trapped between the backhead plate and the valve assembly housing plug. A second end of the throttle lever extends above the backhead plate, and forms an operator contact surface. An intermediate portion between the first end and second end of the throttle lever operably contacts a fluid inlet valve.

Abstract: A system for lubricating and reciprocating a piston in a fluid-activated, percussive paving breaker includes a unitary valve assembly positioned within a bore of a rear portion of a tool housing, the valve assembly having an oil reservoir for lubricating the piston. The valve assembly is retained in place by a combination of a throttle lever and a backhead plate bolted to the rear tool housing.

Abstract: A throttle lever system for operating a flushing system on a percussive, fluid-activated apparatus includes a fluid inlet port, passageways in the apparatus for exhaust fluid, a seal device for opening and closing the passageways, and a throttle lever system for operating the seal device, the throttle lever system including a one-piece throttle lever elastically and pivotally mounted on a pivot pin on the device to cantilever out over the seal device, whereby the lever elastically moves up and down into and out of contact with the seal device, in response to operator hand pressure.

Abstract: A vibration absorbing handle for a power tool includes a monolithic, elastomeric outer gripping member having affixed and extending therein an elongated, hollow support member and a first mounting member for connection to a tool housing, the outer gripping member forming an annular flange between the hollow support member and the mounting member, the flange and outer gripping member providing flexibility and vibration absorption.

Abstract: A drill steel retainer for a jackhammer includes a latch pivotally mounted on the front head of the jackhammer, a detent mechanism for retaining the latch in a tool retaining and tool releasing position, and a stop member on the fronthead for insuring spacing between a work surface and the latch, whereby the latch can be pivoted by the operator at all times. Elastic shock absorber members are included in the latch.

Abstract: A throttle lever system for operating a flushing system on a percussive, fluid-activated apparatus includes a fluid inlet port, passageways in the apparatus for exhaust fluid, a seal device for opening and closing the passageways, and a throttle lever system for operating the seal device, the throttle lever system including a one-piece throttle lever elastically and pivotally mounted on a pivot pin on the device to cantilever out over the seal device, whereby the lever elastically moves up and down into and out of contact with the seal device, in response to operator hand pressure.