Rapidly shifting leakage-proof electromagnetically actuated valve

Claim 2

A rapidly shifting, leak-proof electromagnetically actuated valve for liquids or gases with a direct hydraulic control of the medium to be shifted and with a pole element and an adjustable piston armature means, characterized in that a gap formed between said piston armature means and said pole element is determinable within predetermined limits, said pole element directly supporting a coil wound thereon in a predetermined small space with a large number of turns, in that the construction of the valve provides a short closed magnetic circuit for the field produced by said coil, and wherein the small space provided between the valvE housing means and the pole element is filled out with the largest possible number of turns of coil wire in that a thin coil wire provided with a hardenable lacquer layer which is wound directly on the pole element with a large number of turns, avoiding a separate coil form, is heated by a defined current pulse that bonds together the wire turns and hardens the lacquer and therewith forms the wire turns into a rigid coil packet.

Claim 3

A valve according to claim 1, characterized in that the stroke of the piston armature means is also adjustable.

Claim 4

A valve according to claim 2, characterized in that said piston armature means includes further means rendering the same readily slidable and liftable.

Claim 5

A valve according to claim 3, characterized in that said further means includes a sliding layer at the outer surface of the piston armature means.

Claim 6

A valve according to claim 4, characterized in that said sliding layer consists of a non-magnetic material selected from one of a metal and plastic material.

Claim 7

A rapidly shifting, leak-proof electromagnetically actuated valve for liquids or gases with a direct hydraulic control of the medium to be shifted and with a pole element and an adjustable piston armature means, characterized in that a gap formed between said piston armature means and said pole element is determinable within predetermined limits, said pole element directly supporting a coil wound thereon in a predetermined small space with a large number of turns, in that the construction of the valve provides a short closed magnetic circuit for the field produced by said coil, in that the stroke of the piston armature means is also adjustable, in that said piston armature means includes further means rendering the same readily slidable and liftable, said further means including a sliding layer at the outer surface of said piston armature means, in that said valve housing means is provided with an inner guide surface means for the piston armature means, and in that the inner guide surfaces means, the outer diameter of the piston armature means and the sliding layer thereon are so dimensioned that the play resulting between the guide surface means and the sliding layer has, at most, the thickness of the sliding layer.

Claim 8

A rapidly shifting, leak-proof electromagnetically actuated valve for liquids or gases with a direct hydraulic control of the medium to be shifted and with a pole element and an adjustable piston armature means, characterized in that a gap formed between said piston armature means and said pole element is determinable within predetermined limits, said pole element directly supporting a coil wound thereon in a predetermined small space with a large number of turns, in that the construction of the valve provides a short closed magnetic circuit for the field produced by said coil, in that the stroke of the piston armature means is also adjustable, in that said piston armature means includes further means rendering the same readily slidable and liftable, said further means including a sliding layer at the outer surface of said piston armature means, in that said valve housing means is provided with an inner guide surface means for the piston armature means, and in that the inner guide surfaces means, the outer diameter of the piston armature means and the sliding layer thereon are so dimensioned that the play resulting between the guide surface means and the sliding layer has, at most, the thickness of the sliding layer.

Claim 9

A valve according to claim 6, characterized in that the gap is between two mutually opposite end faces of the piston armature means and in that said further means includes groove means provided at least at one of the two mutually opposite end faces of the piston armature means and the pole element.

Claim 10

A valve according to claim 7, characterized in that the gap is formed by a bearing needle having a substantially hemispherically shaped head portion serving as sealing element supported in the piston armature means by a needle mounting means and projecting out of the piston armature means, and by a seating ring means inserted into one of the pole element and a cover means closing the valve housing, the sealing ring means forming the valve seat for the bearing needle, each of the bearing needle and the steering ring means being detachable members and selected from a plurality of differently dimensioned bearing needles and seating ring means for the determination of the gap.

Claim 11

A valve according to claim 8, characterized in that said seating ring means is formed of non-magnetic material.

Claim 12

A valve according to claim 8, characterized in that the stroke of the piston armature means is adjustable from one end by the hollow screw means screwed into the cover means closing the valve housing means and secured in its screwed-in depth by a counter nut.

Claim 13

A valve according to claim 10, wherein the small space provided between the valve housing means and the pole element is filled out with the largest possible number of turns of coil wire in that a thin coil wire provided with a hardenable lacquer layer which is wound directly on the pole element with a large number of turns, avoiding a separate coil form, is heated by a defined current pulse that bonds together the wire turns and hardens the lacquer and therewith forms the wire turns into a rigid coil packet.

Claim 14

A valve according to claim 11, characterized in that the space of the coil packet is delimited with respect to the chamber through which flows the working medium by a ring means of glass fiber reinforced plastic material which is the support of at least one sealing ring.

Claim 15

A valve according to claim 11, characterized by an over-all construction thereof which avoids offsets and sharp edges and in which the pole element, valve housing means, and piston armature means have simple, substantially rectangular shapes as viewed in axial cross section fitting one within the other, thus forming a short closed magnetic circuit by way of the adjacent parts of the pole element, the valve housing means and the piston armature means.

Claim 16

A valve according to claim 13, which is constructed as inlet valve, characterized in that a tension spring engaging, on the one hand, into the hollow screw means screwed into the cover means, and on the other, at the piston armature means, seeks to lift the piston armature means together with its bearing needle from its seating ring means opposite the spring engagement.

Claim 17

An inlet valve according to claim 14, characterized in that a discardable handle is arranged at a spring mounting means inserted into the hollow screw means and supported thereon by way of a tapered portion which can be broken off after the insertion of the spring mounting means.

Claim 18

A valve according to claim 13, which is constructed as outlet valve, characterized in that a compression spring engaging, on the one hand, at the pole element and, on the other at the piston armature means, seeks to press the piston armature means with its bearing needle means against the hollow screw means screwed into the cover means and forming simultaneously the seating ring means of the bearing needle means.

Claim 19

A valve according to claim 13, characterized in that the bearing needle mounting means is seated with radial play in a bore of the piston armature means and abuts with an end face opposite the spring means at an abutment surface connected with the piston armature means.

Claim 20

A valve according to claim 17, characterized in that the portion of valve housing means surrounding the piston armature means is provided with passages which connect with each other the chamber portions traversed by the working medium and disposed on both end faces of the piston armature means.

Claim 21

A valve with a valve housing means according to claim 1, characterized in that said piston armature means is provided with a sliding layer and said valve housing means is provided with an inner guide surface means for the piston armature means, and in that the inner guide surface means, the outer diameter of the piston armature means and the sliding layer thereon are so dimensioned that the play resulting between the guide surface means and the sliding layer has, at most, the thickness of the sliding layer.

Claim 22

A valve according to claim 19, characterized in that the gap is between two mutually opposite end faces of the piston armature means and in that groove means are provided at least at one of the two mutually opposite end faces of the piston armature means and the pole element.

Claim 23

A rapidly shifting, leak-proof electromagnetically actuated valve for liquids or gases with a direct hydraulic control of the medium to be shifted and with a pole element and an adjustable piston armature means, characterized in that a gap formed between said piston armature means and said pole element is determinable within predetermined limits, said pole element directly supporting a coil wound thereon in a predetermined small space with a large number of turns, in that the construction of the valve provides a short closed magnetic circuit for the field produced by said coil, and in that the gap is formed by a bearing needle having a substantially hemispherically shaped head porTion serving as sealing element supported in the piston armature means by a needle mounting means and projecting out of the piston armature means, and by a seating ring means inserted into the pole element and forming the valve seat for the bearing needle, each of the bearing needle and the steering ring means being detachable members and selected from a plurality of differently dimensioned bearing needles and seating ring means for the determination of the gap.

Claim 24

A rapidly shifting, leak-proof electromagnetically actuated valve for liquids or gases with a direct hydraulic control of the medium to be shifted and with a pole element and an adjustable piston armature means, characterized in that a gap formed between said piston armature means and said pole element is determinable within predetermined limits, said pole element directly supporting a coil wound thereon in a predetermined small space with a large number of turns, in that the construction of the valve provides a short closed magnetic circuit for the field produced by said coil, and in that the gap is formed by a bearing needle having a substantially hemispherically shaped head porTion serving as sealing element supported in the piston armature means by a needle mounting means and projecting out of the piston armature means, and by a seating ring means inserted into the pole element and forming the valve seat for the bearing needle, each of the bearing needle and the steering ring means being detachable members and selected from a plurality of differently dimensioned bearing needles and seating ring means for the determination of the gap.

Claim 25

A valve according to claim 21, characterized in that said seating ring means is formed of non-magnetic material.

Claim 26

A rapidly shifting, leak-proof electromagnetically actuated valve for liquids or gases with a direct hydraulic control of the medium to be shifted and with a pole element and an adjustable piston armature means, characterized in that a gap formed between said piston armature means and said pole element is determinable within predetermined limits, said pole element directly supporting a coil wound thereon in a predetermined small space with a large number of turns, in that the construction of the valve provides a short closed magnetic circuit for the field produced by said coil, and in that the stroke of the piston armature means is adjustable from one end by a hollow screw means screwed into a cover means closing the valve housing means and secured in its screwed-in depth by a counter nut.

Claim 27

A rapidly shifting, leak-proof electromagnetically actuated valve for liquids or gases with a direct hydraulic control of the medium to be shifted and with a pole element and an adjustable piston armature means, characterized in that a gap formed between said piston armature means and said pole element is determinable within predetermined limits, said pole element directly supporting a coil wound thereon in a predetermined small space with a large number of turns, in that the construction of the valve provides a short closed magnetic circuit for the field produced by said coil, and in that the stroke of the piston armature means is adjustable from one end by a hollow screw means screwed into a cover means closing the valve housing means and secured in its screwed-in depth by a counter nut.

Claim 28

A valve according to claim 24, characterized in that the space of the coil packet is delimited with respect to the chamber through which flows the working medium by a ring means of glass fiber reinforced plastic material which is the support of at least one sealing ring.

Claim 29

A valve according to claim 1, characterized by an over-all construction thereof which avoids offsets and sharp edges and in which the pole element, valve housing means, and piston armature means have simple, substantially rectangular shapes as viewed in axial cross section fitting one with the other, thus forming a short closed magnetic circuit by way of the adjacent parts of the pole element, the valve housing means and the piston armature means.

Claim 30

A valve according to claim 23, which is constructed as inlet valve, characterized in that a tension spring engaging, on the one hand, into the hollow screw means screwed into the cover means, and on the other, at the piston armature means, seeks to lift the piston armature means together with its bearing needle from its seating ring means opposite the spring engagement.

Claim 31

An inlet valve according to claim 26, characterized in that a discardable handle is arranged at a spring mounting means inserted into the hollow screw means and supported thereon by way of a tapered portion which can be broken off after the insertion of the spring mounting means.

Claim 32

A valve according to claim 23, which is constructed as outlet valve, characterized in that a compression spring engaging, on the one hand, at the pole element and, on the other at the piston armature means, seeks to press the piston armature means with its bearing needle means against the hollow screw means screwed into the cover means and forming simultaneously the seating ring means of the bearing needle means.

Claim 33

A valve according to claim 21, characterized in that the bearing needle mounting means is seated with radial play in a bore of the piston armature means and abuts with an end face opposite a spring means at an abutment surface connected with the piston armature means.

Claim 34

A rapidly shifting, leakproof electromagnetically actuated valve for liquids or gases with a direct hydraulic control of the medium to be shifted and with a pole element and an adjustable piston armature means, characterized in that a gap formed between said piston armature means and said pole element is determinable within predetermined limits, said pole element directly supporting a coil wound thereon in a predetermined small space with a large number of turns, in that the construction of the valve provides a short closed magnetic ciRcuit for the field produced by said coil, and in that the portion of valve housing means surrounding the piston armature means is provided with passages which connect with each other the chamber portions traversed by the working medium and disposed on both end faces of the piston armature means.

Claim 35

A rapidly shifting, leakproof electromagnetically actuated valve for liquids or gases with a direct hydraulic control of the medium to be shifted and with a pole element and an adjustable piston armature means, characterized in that a gap formed between said piston armature means and said pole element is determinable within predetermined limits, said pole element directly supporting a coil wound thereon in a predetermined small space with a large number of turns, in that the construction of the valve provides a short closed magnetic ciRcuit for the field produced by said coil, and in that the portion of valve housing means surrounding the piston armature means is provided with passages which connect with each other the chamber portions traversed by the working medium and disposed on both end faces of the piston armature means.