Abstract: Method and apparatus for drip irrigation having a water supply tank connected to a constant water level tank by a drain pipe having a drain opening. A supply tube extends from the constant water level tank and is connected to a supply tank with an open top located inside of an air tight casing. The casing contains fillers and has its bottom open to the soil. The system is applicable to irrigate farms and potted plants.

Abstract: A salt damage preventive irrigation method and its apparatus. In this irrigation method, the poisonous salt contained in irrigation water can be concentrated near the emitting opening of an emitter and the moistened area can be prepared in the soil with water free of salt contained in the irrigation water.

Abstract: A method and device for automatically increasing the restoring force of a pneumatic tire characterized in that the centrifugal force created by rotation of the tire is caused to act on a liquid within a large diameter chamber of a centrifugal pump and the thus highly pressurized liquid is forced into the tire, so that the deformation of the wheel tread of the tire during operation of a vehicle is rapidly restored.

Abstract: Apparatus for remotely controlling the internal pressure in a pneumatic tire, in which the inside of a pneumatic chamber mounted on a wheel is divided into a first chamber communicating with a fluid-supply source and a second chamber communicating with an air space in the tire by a diaphragm made of a flexible material. In an operation controlled from a vehicle cab, a fluid is introduced into the first chamber, thus compressing the second chamber so as to change the volume thereof, and thereby control the pressure in the air space with the tire by controlling the pressure in said second chamber.

Abstract: Apparatus for remotely controlling the pressure in a pneumatic tire in which a pneumatic chamber communicating with a tube inserted in a tire and a chamber whose internal pressure is remote-controlled from the cab are aligned on the same axle of a vehicle. The piston penetrates into both chambers and the internal pressure in the tube can be adjusted by changing the internal volume of the pneumatic chamber due to displacement of the piston.

Abstract: The present invention relates to a process and device for the automatic regulation of the internal pressure in a pneumatic tire characterized in that the air is forced into the pneumatic chamber of a tire by the centrifugal force generated by the revolution of the wheel, and the pressure inside said pneumatic chamber can thereby be automatically changed in dependence on the speed of rotation of the wheel.