US3732893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solenoid valve
Assignee: Robert Bosch GmbH
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Filing: 1972-03-06
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Granted: 1973-05-15
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Expires: 1992-03-06
Abstract
Abstract In a solenoid valve the axially movable magnet armature (driving piston) is connected through an actuating ram with a valve head which is movable between two valve seats and which is urged against the electromagnet force by a spring-biased counterpiston engaging said valve head at its end remote from said ram.
Inventors
- 👤 K Ziesche
- 👤 W Hans
- 👤 J Duffner
- 👤 G Brune
- 👤 A Grob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:42
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0603; F16K31/0624; F16K31/0627; F16K39/00; F16K39/04; Y; Y10; Y10T; Y10T137/00; Y10T137/794; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
211 words
In a solenoid valve of the known type having (a) a housing including a valve inlet and a valve outlet for fluid, (b) a pressure-equalized drive piston, (c) a movable valve head operatively connected to said drive piston and adapted to assume a first position in which communication is maintained between said valve inlet and said valve outlet and a second position in which communication is blocked between said valve inlet and said valve outlet, (d) a valve seat cooperating with said valve head and disposed between said valve inlet and said valve outlet, the improvement comprising A. a solenoid, B. a magnet armature movably disposed in said housing and displaceable by the energization and de-energization of said solenoid, said armature constituting said drive piston, C. an actuating ram operatively connected with, but constituting a component separate from said armature, D. a movable valve head having 1. a first end oriented towards said armature and being in engagement with said actuating ram, 2. a second end oriented away from said armature, E. a movable counterpiston in engagement with said second end of said valve head and F. a compression spring in engagement with said counterpiston for urging said valve head, said actuating ram and said armature into one of said positions.
Claim 2
Dependent Claim
211 words
In a solenoid valve of the known type having (a) a housing including a valve inlet and a valve outlet for fluid, (b) a pressure-equalized drive piston, (c) a movable valve head operatively connected to said drive piston and adapted to assume a first position in which communication is maintained between said valve inlet and said valve outlet and a second position in which communication is blocked between said valve inlet and said valve outlet, (d) a valve seat cooperating with said valve head and disposed between said valve inlet and said valve outlet, the improvement comprising A. a solenoid, B. a magnet armature movably disposed in said housing and displaceable by the energization and de-energization of said solenoid, said armature constituting said drive piston, C. an actuating ram operatively connected with, but constituting a component separate from said armature, D. a movable valve head having 1. a first end oriented towards said armature and being in engagement with said actuating ram, 2. a second end oriented away from said armature, E. a movable counterpiston in engagement with said second end of said valve head and F. a compression spring in engagement with said counterpiston for urging said valve head, said actuating ram and said armature into one of said positions.
Claim 3
Dependent Claim
48 words
a second end oriented away from said armature, E. a movable counterpiston in engagement with said second end of said valve head and F. a compression spring in engagement with said counterpiston for urging said valve head, said actuating ram and said armature into one of said positions.
Claim 4
Dependent Claim
48 words
a second end oriented away from said armature, E. a movable counterpiston in engagement with said second end of said valve head and F. a compression spring in engagement with said counterpiston for urging said valve head, said actuating ram and said armature into one of said positions.
Claim 5
Dependent Claim
34 words
An improvement as defined in claim 1, including a return port in said housing and an additional valve seat cooperating with said valve head and situated between said valve outlet and said return port.
Claim 6
Dependent Claim
41 words
An improvement as defined in claim 2, wherein a surface of said counterpiston is exposed to the pressure of said fluid, the effective area of said additional valve seat is at least approximately as large as said surface of said counterpiston.
Claim 7
Dependent Claim
53 words
An improvement as defined in claim 2, including an intermediate sleeve surrounding said valve head and having two opposed radial edge faces, one of said valve seats being coplanar with one of said radial edge faces and the other of said valve seats being coplanar with the other of said radial edge faces.
Claim 8
Dependent Claim
46 words
An improvement as defined in claim 1, including A. a depressurized chamber, B. a pressurized chamber separated from said depressurized chamber by said counterpiston, C. channel means maintaining communication between said pressurized chamber and said valve inlet and D. a filter disposed in said channel means.
Claim 9
Dependent Claim
88 words
An improvement as defined in claim 1, including A. a guide sleeve provided with a bore for slidably receiving said counterpiston in a snug fit, B. a sphere affixed to that end of said counterpiston which is oriented towards said valve head, C. means forming part of said valve head and defining an opening receiving said sphere for causing said counterpiston to carry said valve head and D. an intermediate sleeve disposed adjacent said guide sleeve, said valve head being surrounded by and movable within said intermediate sleeve.
Claim 10
Dependent Claim
32 words
An improvement as defined in claim 1, including an intermediate sleeve surrounding said valve head and having a radial edge face, said valve seat being disposed coplanar with said radial edge face.
Claim 11
Dependent Claim
40 words
An improvement as defined in claim 1, including A. a magnet core, B. spring means in engagement with said magnet core and C. tightening means clamping said magnet core against said housing overcoming the force of said last-named spring means.
Claim 12
Dependent Claim
20 words
An improvement as defined in claim 1, wherein the sliding faces for the armature are coated with a synthetic material.
Claim 13
Dependent Claim
18 words
An improvement as defined in claim 1, wherein the sliding faces for the armature are coated with chromium.
Claim 14
Dependent Claim
42 words
An improvement as defined in claim 1, including A. means forming part of said armature and defining an opening therein into which extends a terminus of said actuating ram and B. an intermediate component having an annular shoulder guiding said actuating ram.
References Cited (Backward Citations)
US3661183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |