US4418886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-magnetic valves particularly for household appliances
Assignee: Individual
•
Filing: 1982-03-04
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Granted: 1983-12-06
•
Expires: 2002-03-04
Abstract
Abstract The electro-magnetic valve includes a hydraulic pilot control consisting of an inlet and outlet with a concentric valve seat, sealable by a flexable diaphragm. The inlet and outlet are both arranged on one side of the diaphragm and a hydraulic pressure is arranged on the other side of the diaphragm. A filling aperture from the inlet to the pressure chamber and a central pressure relief aperture from the pressure chamber to the outlet are provided, the central pressure relief aperture being connected to a bypass in the valve body. An electro-magnetic means for opening the pressure relief aperture is also included.
Inventors
- 👤 Walter Holzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:07
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; F16K31/402
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
157 words
An electro-magnetic valve having hydraulic control consisting of a valve body having an inlet and an outlet, a valve seat sealable by a flexible diaphragm, in which both the inlet and the outlet are arranged on a first side of the diaphragm, a hydraulic pressure chamber on a second side of the diaphragm, a filling aperture from the inlet to the pressure chamber and a pressure-relief aperture from the pressure chamber to the outlet, an armature which, when unenergized, closes the pressure-relief aperture under spring pressure, wherein the improvement comprises said hinged armature being positioned entirely within the pressure chamber and said pressure-relief aperture being opened when said armature is energized; a valve seat of said pressure-relief aperture being a non-flexible part of said diaphragm; and a by-pass in the valve body connecting the pressure-relief aperture and the pressure chamber to the outlet, and said valve seat of said pressure relief aperture being juxtapositioned to said bypass.
Claim 2
Dependent Claim
157 words
An electro-magnetic valve having hydraulic control consisting of a valve body having an inlet and an outlet, a valve seat sealable by a flexible diaphragm, in which both the inlet and the outlet are arranged on a first side of the diaphragm, a hydraulic pressure chamber on a second side of the diaphragm, a filling aperture from the inlet to the pressure chamber and a pressure-relief aperture from the pressure chamber to the outlet, an armature which, when unenergized, closes the pressure-relief aperture under spring pressure, wherein the improvement comprises said hinged armature being positioned entirely within the pressure chamber and said pressure-relief aperture being opened when said armature is energized; a valve seat of said pressure-relief aperture being a non-flexible part of said diaphragm; and a by-pass in the valve body connecting the pressure-relief aperture and the pressure chamber to the outlet, and said valve seat of said pressure relief aperture being juxtapositioned to said bypass.
Claim 3
Dependent Claim
36 words
An electro-magnetic valve as claimed in claim 1, wherein the hinged armature includes a two-sided lever, a first side being loaded by a spring causing the closing pressure and a second side closing the pressure-relief aperture.
Claim 4
Dependent Claim
28 words
An electro-magnettic valve as claimed in claim 1, wherein the spring is arranged close to the bearing of the armature on one pole shoe of the magnet system.
Claim 5
Dependent Claim
25 words
An electro-magnetic valve as claimed in claim 1, wherein the hinged armature comprises a flat plane part pivotable about a leg of the pole shoe.
Claim 6
Dependent Claim
25 words
An electro-magnetic valve as claimed in claim 1, wherein the hinged armature is bent, in the region of its bearing, away from the pole shoes.
Claim 7
Dependent Claim
28 words
An electro-magnetic valve as claimed in claim 1, wherein an insert supports the spring of the magnet system and is positioned in the pressure chamber above the diaphragm.
Claim 8
Dependent Claim
26 words
An electro-magnetic valve as claimed in claim 6, wherein slits are formed in said insert, in the region of the filling aperture, in a screen-like manner.
Claim 9
Dependent Claim
18 words
An electro-magnetic valve as claimed in claim 6, wherein the insert serves as a guide for the armature.
Claim 10
Dependent Claim
22 words
An electro-magnetic valve as claimed in claim 1, wherein the filling aperture to the pressure chamber is arranged in the valve body.
Claim 11
Dependent Claim
23 words
An electro-magnetic valve as claimed in claim 1, wherein a screen-like slit is arranged in the inlet in front of the filling aperture.
References Cited (Backward Citations)
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US2292477A
Cited
US2412490A
Cited
US3090592A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |