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US 7,126,449 B2Granted
Electromagnetic valve
AssigneeAndreas Stihl AG & Co. KG
InventorsHans Nickel, Claus Naegele
Life of this patent
Estimating the term…
Abstract
An electromagnetic valve (1, 21) includes a coil (2) which is fixedly connected to an iron core (3). An armature plate (5) is movably journalled in the direction of the coil longitudinal axis (22) relative to the iron core (3). At least two flow channels (8, 9; 26, 27, 28, 29) open at the armature plate (5) and are fluidly separated from each other when a current flows in the coil (2). A small structural size with a simple manufacture of the electromagnetic valve (1, 21) is achieved in that a flow channel (8; 26, 27, 28) opens in the peripheral region (32) of the armature plate (5) at the end (33) of the armature plate (5) facing toward the coil (2).
Claims15
An electromagnetic valve comprising:
- an iron core;
- a coil defining a longitudinal axis and being tightly connected to said iron core;
- an armature plate movably mounted for movement relative to said iron core in the direction of said longitudinal axis;
- said armature plate having a side facing toward said coil;
- a first flow channel opening out at said armature plate at said side facing toward said coil;
- a second flow channel opening out at said armature plate;
- said armature plate having a peripheral region and said first flow channel opening out at said peripheral region of said armature plate;
- said armature plate being movable between a first position whereat said first and second flow channels communicate with each other and a second position whereat said first and second flow channels are fluidly separated from each other;
- and,
- wherein there is a current flow in said coil when said armature plate is in said second position.
7 more elements
An electromagnetic valve comprising:
- an iron core;
- a coil defining a longitudinal axis and being tightly connected to said iron core;
- an armature plate movably mounted for movement relative to said iron core in the direction of said longitudinal axis;
- said armature plate having a side facing toward said coil;
- a first flow channel opening out at said armature plate at said side facing toward said coil;
- a second flow channel opening out at said armature plate;
- said armature plate having a peripheral region and said first flow channel opening out at said peripheral region of said armature plate;
- said armature plate being movable between a first position whereat said first and second flow channels communicate with each other and a second position whereat said first and second flow channels are fluidly separated from each other;
- wherein there is a current flow in said coil when said armature plate is in said second position;
- said second flow channel opening out at a side of said armature plate facing away from said coil;
- further comprising an annular gap formed at the periphery of said armature plate;
- and, said first and second flow channels communicating with each other via said annular gap when said armature plate is in said first position;
- and,
- said valve further comprising a housing common to said coil and said iron core and said coil and said iron core being injection molded in said housing.
11 more elements
An electromagnetic valve comprising:
- an iron core;
- a coil defining a longitudinal axis and being tightly connected to said iron core;
- an armature plate movably mounted for movement relative to said iron core in the direction of said longitudinal axis;
- said armature plate having a side facing toward said coil;
- a first flow channel opening out at said armature plate at said side facing toward said coil;
- a second flow channel opening out at said armature plate;
- said armature plate having a peripheral region and said first flow channel opening out at said peripheral region of said armature plate;
- said armature plate being movable between a first position whereat said first and second flow channels communicate with each other and a second position whereat said first and second flow channels are fluidly separated from each other;
- wherein there is a current flow in said coil when said armature plate is in said second position;
- further comprising a spring for resiliently biasing said armature plate into said first position away from said coil;
- said armature plate being guided by said spring;
- further comprising stop means for delimiting the axial movement of said armature plate;
- and,
- a housing common to said coil and said iron core and said coil and said iron core being mounted in said housing;
- and, a cover enclosing said armature plate and said stop means being formed on said cover.
12 more elements
Dependencies are inferred from the claim text.