 Core of solenoid actuator |
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| Engine valve operating system for internal combustion engine |
| However, this initialization method is required to further certainly execute the initializing ... |
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| Motor driven value |
| The invention claimed is: 1. A motor-actuable valve for influencing the cross section of a fluid ... |
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| Pneumatically driven train brake pipe pressure exhaust valve |
| This invention, according to a first aspect thereof, is predicated on the development of a new, ... |
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| Controller for fluid pressure operated devices |
| Accordingly, it is an object of the present invention to provide a controller for fluid pressure ... |
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| Insert type sliding gate valve |
| This invention relates to improvements in the art of sliding gate valves. Sliding gate type ... |
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| Pressure balanced gate valve having selective actuator systems |
| OF PREFERRED EMBODIMENTS Referring now to the drawings and first to FIG. 1, there is shown a gate ... |
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| Microvalve |
| Sections of a microminiature valve constructed in layers and having an inlet and a closing element ... |
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| Electromagnetically operable fluid flow control valve mechanism |
| What is claimed is: 1. A control valve mechanism comprising: a casing assembly defining a chamber ... |
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Air flow direction control valves
| Details |
Inventors: Goto, Kenji; Hashiguchi, Yukihide; Shibata, Norio;
Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha (Toyoda, JA)
Primary Examiner: Klinksiek; Henry T.
Assistant Examiner:
Attorney, Agent or Firm: Stevens, Davis, Miller & Mosher
An improved air flow direction control valve particularly adapted for use with an exhaust gas purifying system on an internal combustion engine to control the direction of flow of air to be mixed into exhaust gas for effecting additional combustion of the uncombusted constituents therein. The valve essentially comprises a pair of valve members selectively operable to open one of two main outlets and a diaphragm operated shaft for selectively operating the two valve members upon movement between a first and a second position. The shaft is formed with a pair of shoulders which define a reduced diameter shaft portion therebetween, and the two valve members encircle the reduced diameter shaft portion in an oppositely facing relation. The reduced diameter shaft portion is slidable relative to the two valve members and upon movement of the shaft axially into its first position, one of the shoulders thereof is engageable with the first valve member to open the first main outlet, while the other shoulder is engageable with the second valve member to open the second main outlet upon movement of the shaft into its second position. At least one coil spring is provided for urging either of the valve members not engaged by the corresponding shaft shoulder, into a position to keep the corresponding valve outlet closed. The valve further includes a third valve member which is resiliently supported to close an auxiliary valve outlet. According to one embodiment of the invention, the third valve member is operated independently of the shaft, while according to another embodiment, it is operationally associated with the shaft. |
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DETAILED DESCRIPTION It is an object of this invention to eliminate the above mentioned drawbacks of the device known in the art and provide a novel and improved multi-way air flow direction control valve of simpler and less expensive construction which comprises a single housing and a couple of valve members which are associated with a couple of main valve outlets, respectively, and adapted for actuation easily and selectively through operation of a single operating member to selectively open either of the two main outlets.
The valve of this invention comprises a housing having an air inlet and a first, a second and a third outlet; a first valve member associated with the first outlet to keep it normally closed; a second valve member associated with the second outlet to keep it normally closed; a diaphragm operated shaft movable axially between a first and a second position for selectively operating the first and second valve members to selectively open the first and second outlets in such a fashion that while the first outlet is opened, the second outlet is closed and vice versa.
The shaft is formed with a pair of mutually facing shoulders which define a reduced diameter shaft portion therebetween, and the first and second valve members encircle the reduced diameter shaft portion in an oppositely facing relation.
The reduced diameter shaft portion is slidable relative to the first and second valve members and upon movement of the shaft into its first position, one of the shoulders thereof is engageable with the first valve member to open the first outlet, while the other shoulder is engageable with the second valve member to open the second outlet upon movement of the shaft into its second position.
At least one coil spring is provided for urging either of the first and second valve members not engaged by the corresponding shaft shoulder, into a position to keep the corresponding valve outlet closed.
The valve further includes a third valve member resiliently supported to normally keep the third outlet closed or open
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Metal Working 
