US3701366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic solenoid valve directly operated with adjustable over-ride speed
Assignee: ATOS APPARECCHIATURE OLEODINAM
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Filing: 1970-08-14
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Granted: 1972-10-31
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Expires: 1990-08-14
Abstract
Abstract A hydraulic valve is operated by an electromagnet which is enclosed in a tight chamber and actuates a core movable in a cylinder, said core being provided with longitudinal perforations through which the liquid governed by the valve passes as the core moves through said cylinder; the section of the perforation may be adjustable for regulating the speed of the core in the cylinder.
Inventors
- 👤 Paolo Tirelli
- 👤 Elio Saporiti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:47
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0675; F16K31/0679; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
202 words
A hydraulic valve having a direct electromagnetic control device, said hydraulic valve comprising a valve body having a plurality of fluid passages therein including one fluid passage in which hydraulic fluid would normally be present, a valve element positioned within said valve body for shifting movement to control and vary hydraulic fluid flow through said fluid passages, said electromagnetic control device being mounted on said valve body and including a cylinder sealed against external leakage and having an interior in communication with said one fluid passage whereby said cylinder is normally filled with hydraulic fluid from that flowing through said hydraulic valve, said electromagnetic control device also including a winding surrounding said cylinder and a mobile armature slidably mounted within said cylinder for movement under the influence of electrical current flowing in said winding, said armature closely fitting said cylinder and functioning as a piston relative to hydraulic fluid within said cylinder whereby movement of said armature is retarded, and means for operatively connecting said armature to said valve element for shifting the same, said armature having a restricted orifice therethrough for limiting hydraulic fluid flow and thereby slowing and controlling the rate of movement of said armature and said valve element.
Claim 2
Dependent Claim
202 words
A hydraulic valve having a direct electromagnetic control device, said hydraulic valve comprising a valve body having a plurality of fluid passages therein including one fluid passage in which hydraulic fluid would normally be present, a valve element positioned within said valve body for shifting movement to control and vary hydraulic fluid flow through said fluid passages, said electromagnetic control device being mounted on said valve body and including a cylinder sealed against external leakage and having an interior in communication with said one fluid passage whereby said cylinder is normally filled with hydraulic fluid from that flowing through said hydraulic valve, said electromagnetic control device also including a winding surrounding said cylinder and a mobile armature slidably mounted within said cylinder for movement under the influence of electrical current flowing in said winding, said armature closely fitting said cylinder and functioning as a piston relative to hydraulic fluid within said cylinder whereby movement of said armature is retarded, and means for operatively connecting said armature to said valve element for shifting the same, said armature having a restricted orifice therethrough for limiting hydraulic fluid flow and thereby slowing and controlling the rate of movement of said armature and said valve element.
Claim 3
Dependent Claim
64 words
The hydraulic valve of claim 1 wherein said means connecting said armature to said valve element is a plunger, said plug having a bore aligned with said plunger with said plunger passing through said plug bore, and said plunger having a limited clearance relative to said plug bore with said clearance defining a fluid passage between said chamber and said one valve body passage.
Claim 4
Dependent Claim
23 words
The hydraulic valve of claim 2 wherein said restricted orifice extends axially through said armature and is radially offset from said plug bore.
Claim 5
Dependent Claim
53 words
The hydraulic valve of claim 1 wherein the end of said cylinder remote from said valve body is closed by an end wall having a bore therethrough, a manual plunger slidably mounted in said end wall bore for manually shifting said armature, and means sealing said manual plunger relative to said end wall.
Claim 6
Dependent Claim
31 words
The hydraulic valve of claim 1 wherein said winding is carried by a housing telescoped over said cylinder, and means carried by said cylinder releaseably retaining said housing on said cylinder.
Claim 7
Dependent Claim
52 words
The hydraulic valve of claim 1 wherein that end of said cylinder opening into said valve body has a fixed plug therein cooperating with said cylinder to define a chamber in which said armature is positioned and wherein hydraulic fluid is generally trapped independently of hydraulic fluid flowing through said valve body.
Claim 8
Dependent Claim
17 words
The hydraulic valve of claim 6 wherein said plug is in the form of a magnetic core.
Claim 9
Dependent Claim
21 words
The hydraulic valve of claim 6 wherein said plug is sealed peripherally relative to said cylinder and to said valve body.
Claim 10
Dependent Claim
36 words
The hydraulic valve of claim 6 wherein said plug is sealed peripherally relative to said cylinder and to said valve body with said plug having a radial flange clamped between said cylinder and said valve body.
Claim 11
Dependent Claim
42 words
The hydraulic valve of claim 6 wherein spring means react against said valve element to position same, and said plug is cup shaped opening towards said valve body and has seated therein one end of a spring element of said spring means.
References Cited (Backward Citations)
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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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |