Abstract: A quick opening manhole cover including a clamping flange (16) which captures the ears (48) of a locking ring (46) upon rotation of the locking ring with respect to a manhole cover (40). The manhole cover has an O.D. less than the I.D. of the manhole for axial movement into the manhole. A gasket (42) about the manhole cover is clamped between the locking ring (46), manhole cover (40) and against the manhole surface upon axial movement of the manhole cover towards the locking ring.

Abstract: A nosing unit for supporting a flexible member in an expansion gap of a roadway, which nosing unit comprises a laminated wood base to be fixed in a rebate formed in the edge of a roadway section adjacent to the expansion gap, and a topping part detachably secured to the base and serving in use of the nosing unit to present part of a road surface adjacent a said expansion gap.

Abstract: Method and device for orienting asymmetrical retro-reflective elements while spreading horizontal road marking material and for applying the oriented asymmetrical retro-reflective elements to the anchoring road marking surface.

Abstract: PCT No. PCT/US79/00495 Sec. 371 Date July 11, 1979 Sec. 102(e) Date July 11, 1979 PCT Filed July 11, 1979A compacting apparatus (10) has an impact apparatus (17) and a compactor (19). The impact apparatus (17), such as, for example, a rock breaker, provides impacting forces on the compactor (19). The compacting apparatus (10) is positioned on, for example, a work structure (12,14,15) of a work vehicle (16). It is necessary to compact material in order to provide, for example, proper filling of a trench (74) after a pipe has been placed in the trench. Compaction, as done by the compacting apparatus (10), is provided by simultaneously compacting the material and applying a compressive force to the material and remolding the material. Therefore, satisfactory compaction can be provided in the trench (74) by the work vehicle (16) which is also usable to excavate and refill the trench (74).

Abstract: Controlling and operating device for motor-vehicle friction clutches between the engine and a manual change-speed gear, comprising a manually operated electric switch actuated with the gear-shift lever of the vehicle; a limit switch allowing the device to be rendered inoperative; a release mechanism operated by the clutch pedal; a hydro-pneumatic release unit including two coupled working cylinders of which respective pressure spaces are connected via duct elements to a cylinder of the clutch and via an electro-pneumatic valve to a source of a pressure medium; in its rest position the valve prevents communication between the source and the space of one of the cylinders and provides a different communication from the space of that cylinder to a retarding blow-off unit that forms part of the inventive device and communicates with the free atmosphere, while when the valve is in its operative position it opens the first-named communication and prevents the other; and an electrical circuit that serially connects t

Abstract: A triple-sash double-hung storm window assembly which includes a flanged, multiple channeled extrusion of generally rectangular overall configuration. The primary window or first sash of the assembly is the conventional double-hung window built into the house, and the flange of the multi-channeled extrusion is secured to a framing element which surrounds the conventional window at its outer side. The extrusion defines two staggered or offset compound channels forming an intermediate sash and an outer sash. The compound channel which defines the outer sash is peripherally inset from the compound channel defining the intermediate sash so that window and screen elements mounted in the outer sash can be mounted and demounted from the interior of the house, first through the intermediate sash and then through the conventional double-hung window.

Abstract: The present invention relates to a new and improved catch basin including a frame means mounted around an opening in drainage and/or sewer pipes, a riser means having an opening at each end thereof mounted with said frame, and a grid support means and grid means mounted therewith, said grid support means and grid means being positioned on the interior of said riser means and between each of said openings in said riser means for preventing undesirable, unwanted, oversized objects from entering into the drainage and/or sewer pipes.

Abstract: An adjustable manhole cover support. The support comprises an outer ring having a circular internal opening. Threaded members are disposed about the interior of the circular opening. An insert is dimensioned to fit within the outer ring to a depth controlled by the abutment of the insert against the threaded members. Studs engage and extend through the threaded members to abut the under surface of the insert to provide control of the depth of the insert into the outer ring and the angulation of the outer ring. The support is simple to make, easy to adjust and trouble-free in operation.

Abstract: A wear-resistant element, particularly in the form of a slab intended to be used as covering in areas exposed to excessive wear. The slab includes a hard wear metal of a hardness exceeding 400 Brinell, said wear-metal being in the form of granules which are embedded into a bonding agent consisting of synthetic resin, ceramic materials, rubber, or a combination of these materials. Preferably, the granules are arranged to agglomerate adjacent the wear face of the slab, whereas the concentration of wear metal towards the bottom of the slab is essentially nil. The resulting slab thus uses less amounts of the expensive wear-resistant material, and at the same time it is lighter than prior-art slabs and easier to manufacture.

Abstract: A process for rejuvenating and recycling used asphalt and a machine including a pugmill mixing chamber for mixing crushed asphalt supplied thereto and for mixing water, calcium oxide and asphalt oil therewith is disclosed. The water and calcium oxide mixture react and chemically combine to form a calcium hydroxide filler material to thus fill the voids and gaps in the rejuvenated asphalt that would otherwise exist. The reaction, being exothermic, increases the temperature of the resultant asphalt based mixture to a level suitable for spreading of the rejuvenated material on a prepared surface. The asphalt oil is preferably preheated using a heat exchanger coil connected to a diesel engine radiator, which coil is immersed in an asphalt oil storage tank carried on the machine so that the viscosity of the oil may be reduced to a reasonable value suitable for pumping to the mixing chamber and spraying on the materials contained therein.

Abstract: An electromechanical clutch for vehicle engine cooling fans includes a driving member mounted for rotation by the vehicle engine and a driven member carrying the engine fan and rotatably mounted on the driving member. The driven and driving members cooperate to define a circumferentially extending gap therebetween. The driving member carries an electrical coil, which is energized when the clutch is to be engaged. A band is disposed within the gap, includes an outer band member which carries a frictional material that is adapted to frictionally engage the driven member and an inner band member which is adapted to engage the driving member when the coil is actuated. The inner and outer members are connected at corresponding ends thereof. The inner member comprises arcuate segments of electromagnetic material and joining segments which interconnects the arcuate segments.

Abstract: An interchange system serving elevated railways and roadways intersecting each other, which system comprises a rotary possessing of a cylindrical plaza at the center thereof and an annular bus stop compound along the periphery of the plaza, a railcar platform above the rotary, interconnecting passages between the plaza, the bus stop compound and the railcar platform and tunnel-like passages dug across under the rotary to reduce a difference between the levels of the plaza and pedestrian paths formed along the opposite sides of the roadways, thereby to ensure the safety and convenience of pedestrians.

Abstract: This invention relates to road paving machines. Such machines are known in which there is a screed extending across the rear end of the machine and comprising two parts lying one behind the other. One part, the first, is fixed (except that it may be tilted and vibrated) relatively to the rest of the machine and the other part lies behind the first and is slidable along the first to enable the overall width of the screed to be varied. The second part is conventionally one of two similar parts that can be slid in opposite directions outwardly from retracted positions to project beyond the ends of the first part so that when the overall width of the screed is a maximum, the second parts project one from each end of the first.In one form proposed for such apparatus, each second part is carried from the first by two telescopic supports extending in the direction of the width of the screed.

Abstract: Reinforced concrete bridge decking comprises a plurality of substantially identical, removable, interchangeable reinforced concrete panels having protruding tongues at opposite ends supported on and retained in place by resilient, shock absorbing pads. The panels each have a metallic frame substantially filled with concrete, and an abrasive material layer is bonded on the top surface of the concrete. The abrasive material layer provides a hard, salt resistant, anti-skid surface on the concrete panels, and also serves to strengthen the panels. The resilient pads are readily removable to release the individual panels, so that a tool can be engaged with the panels in the spaces defined between the tongues at the opposite ends thereof to remove the individual panels for maintenance or repair, or to interchange the panels with one another.

Abstract: A power train with an auxiliary creeper drive system is disclosed which includes an engine, a primary transmission having an output shaft selectively driven by the engine, an auxiliary transmission selectively driven by the engine and operatively associated with the output shaft for driving the output shaft at a creeping rate of speed, and a clutch control arrangement for automatically disconnecting the engine from driving engagement with the output shaft when the auxiliary transmission is drivingly coupled thereto. Such auxiliary creeper drive system is particularly adaptable to the transmission of a fork lift truck.

Abstract: A lubricating oil flow control device, especially for a speed change transmission operating in an oil bath, has a clutch actuator which is shiftable along the periphery of a shaft provided with an oil passage individual to the clutch or operating the latter. This actuating plate has an axially extending sleeve which obstructs a radial bore in the shaft in the unactuated position of the clutch and thereby limits the flow of oil to the clutch plate or lamella. In another operating position of the actuating plate, the bore is unobstructed and provides, e.g. via holes in the sleeve and in a sleeve of a gear to which the clutch can connect the shaft, a substantially direct flow path to the center of the clutch in an unobstructed manner.

Abstract: A delineator pole is provided which pivots when a force is applied thereto and returns to its original position upon release of the force. The pole includes upper and lower segments with a biasing spring completely housed within the lower pole segment which is held in a support structure. The upper and lower pole segments are joined together by the spring and are held in axial alignment by the mating cooperation of a rounded edge lip portion adjacent the lower pole segment and a rounded grooved flange adjacent the upper pole segment. Whenever the upper and lower pole segments are moved out of axial alignment, the force of the spring together with the rounded edge lip portion and the groove of the flange interact to guide the segments back into axial alignment.

Abstract: An operating and down-pressure hydraulic control system for vehicle-mounted implements such as earth compactors and the like. The assembly of hydraulic cylinders, valving and a hydraulic accumulator provided herein operates as a hydraulic system to raise, lower and otherwise position an implement and to provide down-pressure to it. The assembly also permits the hydraulic support of the implement to flex, while maintaining down-pressure on it, when the ground surface elevation rises or falls away relative to the implement as it moves over the ground being worked.

Abstract: A replaceable guide post of the type generally used as a road marker and the like, wherein a flexible tubular post member is provided with a mounting-base structure that is arranged to be secured to a ground surface such as a roadway. The base structure comprises a support-base member adapted to receive and engage a lower flanged portion of the tubular post and a retainer collar member, which is positioned over the base member and the lower portion of the guide post, thereby clamping the post therebetween and affixing the base member to the ground surface. An alternative arrangement thereof further includes a removable mounting-ring member provided with a central opening having the peripheral design of the particular tubular post to be employed therewith.

Abstract: In a preferred embodiment of the invention a pair of shock plates are disposed in parallel, and substantially bi-planar, coupled together by elastomeric elements. One of the shock plates has a cut-out therein and the other has a limb extending into the cut-out and spaced apart from the sides thereof. The one shock plate is mounted to the drum bearing housing of the earth compactor, and the other shock plate is mounted to the frame. Accordingly, upon the drum being vibrated, or shocked, or otherwise displaced, the limb engages one or more sides of the cut-out, and the movement between the plates is thereby limited to a given distance, in order that the elastomeric coupling will not be unduly stretched, destroyed, or fatigued too early.