Through rotating inserting main body which is composed of airlift tubes, high pressure distributors and extractors, the clear water in the hole or bentonite is discharged for preventing the surface of hole as well as mixing the sand grouting and mixing the water to the airlift tube. By the high pressure zet distributor, the high pressure zet is distributed, and then it is absorbed and discharged f...

PURPOSE:To hold the angle of a bucket with a high accuracy as well as prevent the hunting of the bucket by hastening the response of control by using a system in which the angular velocity of the bucket is controlled by the angular veloxity signal of the operating arm and its position is controlled by the deviation signal of the angular veloxity. CONSTITUTION:When operating an operating arm, the a...

PURPOSE:To control the towing speed of a seabed cable layer as well allow a plow to jump up by providing a detector to the back pressure circuit of an oil- pressure cylinder to enable the plow to move in a vertically rocking manner in the rear of the cable layer so as to detect the collision of the plow against an obstacle. CONSTITUTION:The plow 16 of a cable layer 10 supporting the plow 16 in a v...

The identification system consists of an electronic key comprising a passive memory area (10) and a shift register (9) and a lock capable of being coupled with the key. The lock is capable of supplying a pulse causing the code contained in the memory (10) to be loaded into the register (9). The register (9) is looped on itself via connection (113). Before reading the contents of the register (9) a...

PURPOSE:To prevent noise and abrasion of coupling parts by a method wherein electric power supply for a starter is interrupted when a predetermined time has elapsed after the power supply for the starter was begun while the power is supplied to drive the starter again after second predetermined time has elapsed, in case the starter fails to connect the engine upon starting the engine of the au...

A fuel feed system of a fuel priority type for an internal combustion engine. The fuel feed system of the invention has a small auxiliary control unit with no calculation function in addition to a main control unit. When the main control unit malfunctions or is out of order, it is changed over to the auxiliary control unit which insures injection, for instance, at a constant air fuel ratio and in ...