Sensor for cylinder control, and cylinder device incorporating the same
AssigneeAndo Seisakujo Co., Ltd.
InventorEtuo Ando
Life of this patent
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Abstract
In the present invention, sensors for cylinder control are connected to a main cylinder which has an internal cylinder chamber which is partitioned by a piston into two chambers, and they detect the operational state of the piston. There are provided accumulators connected to one of said two chambers by connecting conduits and whose interiors are pressurized by hydraulic fluid which is expelled from said one chamber, and also stop signal generation mechanisms which generate signals to stop the driving of said main cylinder by pressure differential between said accumulators and said connecting conduits generated at the instant that increase of pressure from said one chamber stops.
Claims10
A sensor device for cylinder control which is connected to a main cylinder having an internal cylinder chamber which is partitioned by a piston into two chambers, and which detects the operational state of said piston, comprising:
- an accumulator which is connected via a connecting conduit to one of said two chambers and whose interior is pressurized by fluid expelled from said one chamber;
- and
- a stop signal generation mechanism which generates a signal which stops the driving of said main cylinder due to pressure differential between said accumulator and said connecting conduit which is generated at the instant that the increase of pressure from said one chamber stops.
A cylinder device comprising:
- a main cylinder comprising an internal cylinder chamber which is partitioned by a piston into two chambers,
- a sensor for cylinder control which is connected to the main cylinder, and which detects the operational state of said piston, the sensor including:
- an accumulator which is connected via a connecting conduit to one of said two chambers and whose interior is pressurized by fluid expelled from said one chamber;
- and
- a stop signal generation mechanism which generates a signal which stops the driving of said main cylinder due to pressure differential between said accumulator and said connecting conduit which is generated at the instant that the increase of pressure from said one chamber stops;
- and further comprising:
- a pair of supply and drain conduits of which the one ends are connected to said two chambers of said main by cylinder and which supply and drain fluid thereto and therefrom;
- and
- a changeover valve which is connected to the other ends of said pair of supply and drain conduits, and wherein said sensor for cylinder control is provided so as to connect said connecting conduit to at least one of said pair of supply and drain conduits.
Dependencies are inferred from the claim text.