US 5,180,039 AGranted

Fluid passage unit

AssigneeFichtel & Sachs AG

InventorsLudwig Axthammer, Felix Wossner

Life of this patent

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Abstract

In an electromagnetically operated valve, the armature of a solenoid is arranged in substantial alignment with a valve seat surrounding a channel. The valve seat has a substantially planar surface. A valve member also having a substantially planar surface is provided to sealingly engage the planar surface of the valve seat. The armature of the solenoid has a spherical end face engaging the annular valve member.

Claims22

Dependent claims

A fluid passage unit comprising means (2c) defining a fluid channel system (14, 21a, 15) and an electromagnetically operated valve system (2a) allocated to said fluid channel system (14, 21a, 15) for controlling fluid flow through said fluid channel system (14, 21a, 15) in at least one flow direction, said valve system (2a) comprising an annular valve unit (23) having an axis, a passage therethrough, and two axially spaced, substantially oppositely directed annular sealing areas (23a, 25) substantially coaxial with said axis, a first one (23a) of said annular sealing areas (23a, 25) being sealingly engageable with an annular first counter-sealing area (22) of a valve seat member (21) surrounding a fluid channel (14), a second one (25) of said annular sealing areas (23a, 25) being sealingly engageable with a second counter-sealing area (24) of a counter-sealing member (18) movably guided substantially along said axis with respect to said valve seat member (21), movement of said counter-sealing member (18) substantially along said axis being controllable by electromagnetic control means (17),

said annular valve unit (23) having a radial play with respect to said valve seat member (210 such that said first annular sealing area (23a) of said annular valve unit (23) and said annular first counter-sealing area (22) of said valve seat member (21) have freedom of a substantially radial relative displacement while maintaining sealing engagement thereof and while maintaining a substantially constant orientation of said annular valve unit (23) with respect to said valve seat member (21),
at least one (24) of said second sealing area (25) and said second counter-sealing area (24) being a spherically shaped face (24) having a center close to said axis and defining with the other (25) of said second sealing area (25) and said second counter-sealing area (24) a ball-type spherical seal, such that said second sealing area (25) and said second counter-sealing area (24) maintain sealing engagement with one another even when said countersealing member (18) and said annular valve unit (23) are axially tilted relative to each other,
said annular valve unit (23) being in sealing engagement by said first and second annular sealing areas (23a, 25) with both said annular first counter-sealing area (22) and said second counter-sealing area (24) when said counter-sealing member (18) is in a terminal position close to said valve seat member (21).

Dependencies are inferred from the claim text.

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Abstract

said annular valve unit (23) having a radial play with respect to said valve seat member (210 such that said first annular sealing area (23a) of said annular valve unit (23) and said annular first counter-sealing area (22) of said valve seat member (21) have freedom of a substantially radial relative displacement while maintaining sealing engagement thereof and while maintaining a substantially constant orientation of said annular valve unit (23) with respect to said valve seat member (21),
at least one (24) of said second sealing area (25) and said second counter-sealing area (24) being a spherically shaped face (24) having a center close to said axis and defining with the other (25) of said second sealing area (25) and said second counter-sealing area (24) a ball-type spherical seal, such that said second sealing area (25) and said second counter-sealing area (24) maintain sealing engagement with one another even when said countersealing member (18) and said annular valve unit (23) are axially tilted relative to each other,
said annular valve unit (23) being in sealing engagement by said first and second annular sealing areas (23a, 25) with both said annular first counter-sealing area (22) and said second counter-sealing area (24) when said counter-sealing member (18) is in a terminal position close to said valve seat member (21).