Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
232 words
An electromagnetic shutoff valve for fluids, particularly for compressed gaseous fluids, comprising a tubular coil; a tubular ferromagnetic core surrounded by said coil; a fixed valve seat in said core, said seat having an end face and an annular opening provided in said end face for evacuation of fluid in open position of the valve; a ferromagnetic plunger reciprocably mounted in said core and having a first end face movable into and from sealing engagement with the end face of said seat and a second end face which is subjected to the pressure of inflowing fluid so that the fluid tends to maintain said first end face in engagement with the end face of said seat, said plunger further having a plurality of passages defining discrete paths for the flow of fluid from said second to said first end face, said passages including a first passage having a discharge end within said annular opening and a second passage having a discharge end located radially outwardly of said annular opening; and means for energizing said coil to thereby move said plunger away from said seat and permit the fluid to flow from said passages into said opening, the end face of said seat being engaged by the first end face of said plunger in deenergized condition of said coil whereby the first end face of said plunger seals said opening from said passages.
Claim 2
Dependent Claim
232 words
An electromagnetic shutoff valve for fluids, particularly for compressed gaseous fluids, comprising a tubular coil; a tubular ferromagnetic core surrounded by said coil; a fixed valve seat in said core, said seat having an end face and an annular opening provided in said end face for evacuation of fluid in open position of the valve; a ferromagnetic plunger reciprocably mounted in said core and having a first end face movable into and from sealing engagement with the end face of said seat and a second end face which is subjected to the pressure of inflowing fluid so that the fluid tends to maintain said first end face in engagement with the end face of said seat, said plunger further having a plurality of passages defining discrete paths for the flow of fluid from said second to said first end face, said passages including a first passage having a discharge end within said annular opening and a second passage having a discharge end located radially outwardly of said annular opening; and means for energizing said coil to thereby move said plunger away from said seat and permit the fluid to flow from said passages into said opening, the end face of said seat being engaged by the first end face of said plunger in deenergized condition of said coil whereby the first end face of said plunger seals said opening from said passages.
Claim 3
Dependent Claim
27 words
A valve as defined in claim 1, wherein said plunger has a peripheral surface and said second passage includes at least one groove in said peripheral surface.
Claim 4
Dependent Claim
19 words
A valve as defined in claim 1, wherein said plunger has an axial bore which constitutes said first passage.
Claim 5
Dependent Claim
17 words
A valve as defined in claim 1, wherein said opening consists of a plurality of discrete ports.
Claim 6
Dependent Claim
23 words
A valve as defined in claim 1, wherein said annular opening is a circumferentially complete channel in said end face of said seat.
Claim 7
Dependent Claim
30 words
A valve as defined in claim 1, wherein said valve seat has an annular chamber communicating with said opening and a plurality of fluid evacuating channels communicating with said chamber.
Claim 8
Dependent Claim
24 words
A valve as defined in claim 6, wherein said seat forms part of a nipple having an axial outlet opening communicating with said channels.
Claim 9
Dependent Claim
45 words
A valve as defined in claim 1, wherein said core includes two coaxial tubular sections one of which has an inlet opening for admission of fluid to said second end face of said plunger and the other of which receives said plunger and said seat.
Claim 10
Dependent Claim
13 words
A valve as defined in claim 1, wherein said plunger has nickel-coated surfaces.
Claim 11
Dependent Claim
15 words
A valve as defined in claim 1, further comprising a cooling jacket surrounding said coil.
Claim 12
Dependent Claim
23 words
A valve as defined in claim 10, wherein said jacket includes means for interrupting eddy currents which develop on energization of said coil.