Showing papers on "Screed published in 1968"

Screed extension device

Abstract: A SCREED EXTENSION DEVICE IS DISCLOSED FOR USE IN CONJUNCTION WITH MACHINES FOR LAYING ASPHALT PAVEMENT. SUCH MACHINES NORMALLY EMPLOY A HOPPER FOR HOLDING HOT ASPHALT LOCATED SO AS TO DISCHARGE THIS ATERIAL INTO A DISTRIBUTION CHAMBER WHERE THE ASPHALT IS DISTRIBUTED GENERALLY OVER THE AREA TO BE PAVED. AS THE MACHINE IS MOVED A SCREED MEMBER AT THE REAR END OF THE DISTRIBUTION CHAMBER TENDS TO STRIKE OFF AND LEVEL OFF THE ASPHALT DEPOSITED THROUGH THE ACTION ACHIEVED IN THE DISTRIBUTION CHAMBER. THE SCREED EXTENSION DEVICES OF THE INVENTION ACT AS PART OF SUCH A PAVING MACHINE SO AS TO INCREASE THE DIMENSIONS OF THE DISTRIBUTION CHAMBER AND THE SCREED MEMBER AS THE PAVING MACHINE IS OPERATING SO THAT AREAS OF VARYING WIDTHS ON EACH SIDE OF THE PAVING MACHINE MAY BE PAVED.

Automatic screed control for asphalt pavers

Abstract: A paving machine having a screed control system with individually actuated leveling arms controlled by electrical control means for sensing deviations in rod slope and grade from preset levels. Deviations generate error signals which energize the control circuitry for maintaining the screed at the preselected levels by movement of the leveling arms.

Joint member for concrete slabs

Abstract: A joint member for concrete slabs embodying a vertical stake carrying an ear extending upwardly alongside and in spaced relation to the stake for receiving therebetween a portion of a screed sheet. A barb carried by the ear extends toward the stake and cuts into a side of the screed sheet inserted therebetween.

Improvements in or relating to the laying of concrete and the like materials

Abstract: 1,130,120 Rakes TREMIX ENG Ltd 10 Aug, 1967, No 36667/67 Heading A1B [Also in Division E1] A rake-like hand tool for removing builtup concrete from a screed machine or beam vibrator, and for rough-levelling the concrete surface between a concrete laying machine and a screed machine, comprises a toothed plate 3 having a longitudinal bent-over scraper edge, and diverging side edges In a modification one of the side edges is square to the longitudinal edge and has a semi-circular notch for cleaning the rails of the laying and screed machines

Improvements relating to road carpeting machinery

Abstract: 1,116,922. Road making machines. HUDSWELL CLARKE & CO. Ltd. 11 June, 1965 [13 March, 1964 (2)], Nos. 10635/64 and 10636/64. Addition to 954696. Heading E1G. A machine for laying and levelling flowable hardenable material on pavements and the like has a sub-chassis 26, carrying an adjustable screed 58 and spreader, pivotted to the front end of main chassis, the front of the main chassis having a hopper 120 rotatable about a vertical axis. The hopper has three sides 122, 110 pivotable about horizontal axes by hydraulic rams to aid loading and discharge of the material through aperture 102 to a slat conveyor 42. The machine may be steered by a roller on an arm coupled to the power steering mechanism. The material is passed from the hopper to a rotating spreader by a slat conveyor 42 and is levelled by a screed 58 and compactor. The compactor is hydraulically driven to provide variable stroke and frequency and is held against the screed by spring clamping means.

A method of removing water from roof insulation

Abstract: 1,105,938. Removing superfluous water from roofs. WATEIS Ltd. 26. May, 1966, [26, May, 1965], No. 22465/65. Heading E1S. Superfluous water is removed from a roof covering by pumps attached to pipes which extend through the top waterproof layer to water-permeable material of the covering. Each pipe has perforated walls and extends through an asphalt, a felt and a screed layer and engages the concrete of the roof and extracts water from the screed and the concrete. A perforated box filled with shingle surrounds the pipe. In a modification each pipe rests on a screed layer impermeable to water and is secured to an annular metal sheet by nuts screwed on the pipe. This metal sheet supports the felt and asphalt layer in such a position that these layers are locally held above the screed to form a space and water is extracted from the felt. The pipes are eventually removed.

Improvements in or relating to vents

Abstract: 1,118,818. Roofing ventilator. SEALASCREED Ltd. 24 Nov., 1966 [24 Nov., 1965], No. 50025/65. Heading E1W. A ventilator for an asphalt roof comprises a base portion 18 having apertures 25 in an outwardly extending portion thereof through which vapour collecting between a concrete roof screed topping 13 and a asphalt underlay felt 14 can pass to the underside of the base portion 18 and thus into a bore 17 through the body 16 of the ventilator and out to the atmosphere through holes 23. The base portion 18 is set into the topping 13 to communicate with a light-weight roof screed 12 and, if necessary with exposed base concrete 11 whereby vapour may escape from these layers. The upper end of the body is closed by a removable cap 20 having a drip groove 22. The asphalt roofing 15 is terminated in a groove 24 surrounding the body 16.