US3593738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic injection valve
Assignee: AG fur BIOLOGISCHE VERFAHRENSTECHNIK
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Filing: 1969-09-02
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Granted: 1971-07-20
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Expires: 1989-09-02
Abstract
Abstract An electromagnetic injection valve in which a valve in a valve chamber is connected to and actuated by movable parts located in a pressure housing. The movable parts include bias means to bias the valve in its closed position, and are all subject to the same pneumatic pressure. With this arrangement, electromagnetic means which actuate the valve are only required to exert the force necessary to overcome the bias applied by the bias means to open the valve, irrespective of the pressure subsisting in the valve chamber.
Inventors
- 👤 Achilles Baerfuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:13
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0686; F16K31/0693; F16K31/0644; F16K31/0655; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2931; Y10T137/3115; Y10T137/3127
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
222 words
An electromagnetic injection valve comprising a valve chamber, an inlet and outlet aperture provided in the valve chamber for a medium to be injected and being subjected to pressure, a valve stem passing through the wall of the valve chamber, a valve seat provided in the outlet aperture, a valve body of the said valve stem resting, when the valve is closed, on the valve seat, a magnetizable armature provided on the valve stem at an end thereof removed from the valve body, a solenoid acting on said armature and arranged externally of the valve chamber, resilient means acting on said valve stem so that the valve stem is displaced against the force of the resilient means under the action of the solenoid, the valve chamber at the point where the stem passes through it being sealed off by means of a corrugated diaphragm, all the movable parts arranged externally of the valve chamber being accommodated in a pressure housing, a pneumatic supply acting on the medium to be injected, means independent of said inlet connecting said pneumatic source to said pressure housing and to the side of the diaphragm opposite the valve chamber so that the movable parts are subjected to the same pressure and thus the solenoid may actuate the valve independently of the injection pressure in the valve chamber.
Claim 2
Dependent Claim
222 words
An electromagnetic injection valve comprising a valve chamber, an inlet and outlet aperture provided in the valve chamber for a medium to be injected and being subjected to pressure, a valve stem passing through the wall of the valve chamber, a valve seat provided in the outlet aperture, a valve body of the said valve stem resting, when the valve is closed, on the valve seat, a magnetizable armature provided on the valve stem at an end thereof removed from the valve body, a solenoid acting on said armature and arranged externally of the valve chamber, resilient means acting on said valve stem so that the valve stem is displaced against the force of the resilient means under the action of the solenoid, the valve chamber at the point where the stem passes through it being sealed off by means of a corrugated diaphragm, all the movable parts arranged externally of the valve chamber being accommodated in a pressure housing, a pneumatic supply acting on the medium to be injected, means independent of said inlet connecting said pneumatic source to said pressure housing and to the side of the diaphragm opposite the valve chamber so that the movable parts are subjected to the same pressure and thus the solenoid may actuate the valve independently of the injection pressure in the valve chamber.
Claim 3
Dependent Claim
24 words
An electromagnetic injection valve as defined in claim 1, wherein the solenoid is arranged in the pressure housing and the pressure housing is removable.
Claim 4
Dependent Claim
78 words
An electromagnetic injection valve as defined in claim 1, comprising a sleeve in the valve chamber surrounding said valve stem, a partly hollow insert within the solenoid surrounding said magnetizable armature, an abutment ring on said magnetizable armature, a portion of enlarged internal diameter in said partly hollow insert at the end thereof facing the valve chamber to form a further abutment, and a spring providing said resilient means retained between said aButment ring and said further abutment.
Claim 5
Dependent Claim
66 words
An electromagnetic injection valve as defined in claim 3, comprising an external collar on said partly hollow insert at the end thereof facing the valve chamber, a wall of the pressure housing resting on said collar, and a threaded cap on said partly hollow insert at the end thereof remote from the valve chamber, said threaded cap retaining said pressure housing on said partly hollow insert.
Claim 6
Dependent Claim
56 words
An electromagnetic injection valve as defined in claim 3, comprising at least one transverse aperture provided in a hollow cylindrical portion of said partly hollow insert, a space defined by the internal surface of said partly hollow insert and by the surface of the magnetizable armature, said transverse aperture connecting the pressure chamber to said space.
References Cited (Backward Citations)
US3245651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |