Back to results
US 6,581,624 B1Granted
Automatic pressurized fluid switching device
OwnerMitsuharu Magami, Naoyuki Magami +1inventors
InventorsMitsuharu Magami, Naoyuki Magami, Takuya Magami
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerMitsuharu Magami, Naoyuki Magami +1inventors
InventorsMitsuharu Magami, Naoyuki Magami, Takuya Magami
Estimating the term…
An automatic pressurized fluid switching device performs a switching using pressurized fluid rather than electrical elements, and comprises a pressurized-fluid inlet port, plural pressurized-fluid outlet ports, a switching valve for switching between outlet ports, a pilot valve for piloting the valve switching operation, and a reaction member for controlling the pilot valve in response to pressure of the pressurized fluid introduced. The pilot valve includes a first pilot unit controlled only by the reaction member, and a second pilot unit controlled by the reaction member in its initial and final stages and directly by the pressurized fluid in its middle stage, whereby the second pilot unit in the middle stage is reliably controlled even with little pressurized fluid introduced when again operated after an intermediate stoppage.
An automatic pressurized fluid switching device comprising an inlet port for introducing pressurized fluid, a plurality of outlet ports for discharging the pressurized fluid, a switching valve disposed between said inlet port and said outlet ports for switching over said outlet ports, a pilot valve for piloting switching operation of said switching valve, and a reaction member for controlling pilot action of said pilot valve in response to pressure of the pressurized fluid introduced, characterized in that said pilot valve is provided with a first pilot unit in which the pilot action of said pilot valve is controlled only by said reaction member, and a second pilot unit in which the pilot action of said pilot valve is controlled by said reaction member in its initial and final stages and directly by the pressurized fluid in its middle stage.
Dependencies are inferred from the claim text.