Patents Assigned to Metal Works Ramat David
  • Patent number: 4488683
    Abstract: Self-propelled irrigation equipment for large planted areas comprises a three-wheeled vehicle carrying a water distribution pipe supported by a telescopic girder, both girder and pipe extending across the vehicle to both sides. The pipe has evenly-spaced outlet openings which deliver water direct to the ground through flexible hoses open at their ends. Water is supplied to the equipment through a large, flexible hose stretched out on the ground between a fixed supply point and a large drum mounted on the vehicle. The vehicle is moved towards the supply point by means of a hydraulic actuator at a velocity proportional to the water quantity passing through the equipment to the ground, while the drum is rotated by a second hydraulic actuator at a rotational speed sufficient to wind up the hose on the drum at the rate of the vehicle's progress.
    Type: Grant
    Filed: September 8, 1981
    Date of Patent: December 18, 1984
    Assignee: Metal Works Ramat David
    Inventor: David Chiel
  • Patent number: 4283010
    Abstract: Low-pressure irrigation of fields is carried out simultaneously through a plurality of flexible hoses of equal length, one end of which is connected to a water supply, while the other end is open. The hoses are stretched out in parallel alignment across the field to be irrigated, preferably one hose each between two rows of plants, and all hoses are simultaneously gathered so that their open ends travel over the ground at slow uniform speed while water pours out of the open ends and irrigates the soil. When the open ends of the hoses have reached a point near the water supply, water is turned off and the hoses are transported to another field portion and stretched out in similar fashion. An apparatus for carrying out this irrigation method comprises a slowly rotated shaft which carries grooved pulleys distanced according to the hose distances, one pulley per hose.
    Type: Grant
    Filed: August 16, 1979
    Date of Patent: August 11, 1981
    Assignees: Amatzia Arzi, Metal Works Ramat David
    Inventors: Amatzia Arzi, David Chiel