Electromagnetic control valve
First Claim
1. A plunger-type electromagnetic control valve comprising:
- a plunger reciprocatively disposed in the control valve in a predetermined operative disposition within a solenoid coil structure;
a valve element;
a first spring arranged with the plunger for applying a first bias thereto;
a second spring arranged with the valve element for applying a second bias thereto;
a connecting rod operatively interconnecting the plunger and the valve element; and
a guide arrangement for guiding the plunger in a spaced, contact-free, sliding-friction reducing relationship with respect to the solenoid coil structure;
wherein the connecting rod extends through the plunger and wherein the alignment arrangement comprises first and second guide portions which are made of a low friction material and are arranged to support the connecting rod on either side of the plunger, the first spring being disposed between the first guide portion and the plunger.
1 Assignment
0 Petitions
Accused Products
Abstract
An electromagnetic control valve is provided. The control stability of the electromagnetic control valve is improved because: (1) one end of the guide pin is forced into and then secured in a hole formed in the center of the coil guide so that the plunger moves in the center of the suction portion; (2) one end of the connecting rod is forced into and then secured in a hole formed in the center of the plunger, and a guide portion for guiding the connecting rod is provided in the center of the upper main body; or (3) the connecting rod is forced into and then secured in a hole formed in the center of the plunger, and a first guide portion for guiding the connecting rod is provided at the lower end of the coil guide and/or a second guide portion for guiding the connecting rod is provided at the lower end of the upper main body.
46 Citations
17 Claims
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1. A plunger-type electromagnetic control valve comprising:
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a plunger reciprocatively disposed in the control valve in a predetermined operative disposition within a solenoid coil structure; a valve element; a first spring arranged with the plunger for applying a first bias thereto; a second spring arranged with the valve element for applying a second bias thereto; a connecting rod operatively interconnecting the plunger and the valve element; and a guide arrangement for guiding the plunger in a spaced, contact-free, sliding-friction reducing relationship with respect to the solenoid coil structure; wherein the connecting rod extends through the plunger and wherein the alignment arrangement comprises first and second guide portions which are made of a low friction material and are arranged to support the connecting rod on either side of the plunger, the first spring being disposed between the first guide portion and the plunger. - View Dependent Claims (2, 3, 4)
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5. A plunger-type electromagnetic control valve comprising:
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a plunger for controlling movement of a valve member reciprocatively driven within a fixed upper main body by an electromagnetic coil; an alignment unit for guiding the plunger along a center axis of the fixed upper main body, said alignment unit comprising; a guide hole which extends coaxially through a center of the plunger, and a guide pin having one end immovably secured in a hole formed in a stationary member of the control valve, said guide pin being disposed in the guide hole so that said plunger can reciprocate therealong while being maintained in a spaced, contact free relationship with a member which surrounds the periphery of said plunger, and so that one end of the plunger directly engages a first end of a connecting rod which is reciprocatively disposed in the electromagnetic control valve.
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6. A plunger-type electromagnetic control valve comprising:
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a plunger reciprocatively disposed in the control valve in a predetermined operative disposition within a solenoid coil structure; a valve element; a first spring arranged with the plunger for applying a first bias thereto; a second spring arranged with the valve element for applying a second bias thereto; a connecting rod operatively interconnecting the plunger and the valve element; and a guide arrangement for guiding the plunger in a spaced, contact-free, sliding-friction reducing relationship with respect to the solenoid coil structure; wherein the guide arrangement comprises a guide pin which is rigidly set in a stationary structure of the control valve and an axial bore formed in the plunger in which the guide pin is received. - View Dependent Claims (7, 8)
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9. A plunger-type electromagnetic control valve comprising:
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a plunger for controlling movement of a valve member reciprocatively driven within a fixed upper main body by an electromagnetic coil; an alignment unit for guiding the plunger along a center axis of the fixed upper main body so that an outer peripheral surface of the plunger is maintained in a contact free relationship with surrounding control valve structure, said alignment unit comprising; a guide hole which extends coaxially through a center of the plunger, and a guide pin having one end immovably secured in a pin receiving hole formed in a stationary member of the control valve. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification