Selective cutting (e.g. – punching) – With means to initiate tool selection by sensing pattern... – With means to modify effect of pattern data
Patent
1990-04-17
1991-12-24
Kashnikow, Andres
Selective cutting (e.g., punching)
With means to initiate tool selection by sensing pattern...
With means to modify effect of pattern data
239 70, 239201, 251 3002, B05B 1200, A01G 2516
Patent
active
050744682
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an automatic water sprinkler control system to be used in comparatively large areas such as farm lands including orchards and truck farms, golf courses and so on.
BACKGROUND ART
The hitherto-known system of this type comprises a multiplicity of water sprinkling means such as sprinklers disposed in strategical positions, water pipes disposed in or on the ground and connecting said water sprinkling means with a valve means equipped with a solenoid valve built into the water pipe in a position close to each of said water sprinkling means and a control wiring buried underground between said valve means and a control board installed in a control room or the like, with said valve means being opened and closed from said control board.
However, since the control wiring is buried underground in the above conventional system, there is the problem that when water lines are installed in the ground alongside the control wiring, the control wiring is sometimes damaged during the maintenance of the water lines. Moreover, in the case of a golf course, since the control wiring generally extends several kilometers, voltage drops and insulation failures tend to occur and there is consequently the additional drawback that a thunderbolt falling nearby damages the control wiring. Furthermore, when the control wiring is affected by a thunderbolt or other cause, it is very difficult to locate the point of damage because of underground installation so that much time and labor are involved in inspection and repair work.
Developed to overcome the above-mentioned drawbacks of the conventional system, the present invention has as its object to provide an automatic water sprinkler control system which does not require an extensive control wiring and, hence, is completely free from the risk of damage to the wiring which is associated with the maintenance of water piping and, also, from the risk of malfunctioning of control valves which is associated with such damages.
It is a further object of the present invention to provide a system which requires only a short installation time and a short time for additional work if such work becomes necessary after initial installation, and involves little earth-moving work, thus being suitable for installations, such as golf courses, where damages to the ground surface are serious problems.
It is a still further object of the present invention to provide a system wherein the control valves can be operated positively and accurately even if air or dust enters into the pipeline.
DISCLOSURE OF THE INVENTION
The present invention relates to an automatic water sprinkler control system comprising a main control means having a wireless communications equipment, one or more water sprinkling means installed in an area to be sprinkled with water and adapted to sprinkle water over said area, a water piping installed on or in the ground between a water source and said water sprinkling means and adapted to distribute water from said water source to said water sprinkling means, and a water sprinkling control means installed on the ground in a position close to said water sprinkling means and adapted to control said water sprinkling means, said water sprilkling control means comprising hydraulic valve disposed in said water piping in a position close to said water sprilkling means, a two-way pilot solenoid valve connected at one port thereof to said hydraulic valve through a pilot line and at the other port to a drain piping and adapted to control said two-way pilot solenoid valve, a wireless signal receiving-transmitting means adapted to receive a control signal from said main control means and to transmit an answer signal to said main control means, a solenoid valve control means which is disposed in the vicinity of said two-way pilot solenoid valve, connected to said wireless signal receiving-transmitting means and adapted to control said two-way pilot solenoid valve according to said control signal received by said wireless signal receiving means, and a p
REFERENCES:
patent: 3000398 (1961-09-01), Link
patent: 3372899 (1968-03-01), McPherson
patent: 3386460 (1968-06-01), Dean
patent: 3791619 (1974-02-01), Pett
patent: 3913884 (1975-10-01), Rolfe
patent: 4603832 (1986-08-01), Sjoquist
patent: 4852802 (1989-08-01), Iggulden et al.
Otsuka Naoki
Yamamoto Harushi
Kashnikow Andres
Konan Denki Kabushiki Kaisha
Merritt Karen B.
Sekisui Koji Kabushiki Kaisha
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