Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
256 words
A hydraulic valve, comprising a valve body having a fluid inlet chamber, a user chamber arranged for communication with a user of the fluid admitted into said valve body, a fluid return chamber for recovering fluid from the user, a flow channel arranged for communication with a source of fluid and with said fluid inlet chamber, and a passage connecting said chambers; a spool movably mounted in said passage, said spool having a first position in which said user chamber is in communication with said fluid inlet chamber and is sealed from said return chamber, and said spool having a spool position in which said user chamber is in communication with said return chamber and is sealed from said inlet chamber; and a valve element for selectively sealing said inlet chamber from said flow channel and for selectively providing communication between said inlet chamber and said flow channel, said valve element including a movable sealing member which is arranged in said flow channel, and said sealing member having one position in which said inlet chamber is sealed from said flow channel and another position in which said inlet chamber communicates with said flow channel, said sealing member being provided with a conduit having a pair of ends which open to said flow channel, and said sealing member having a face which is exposed to said flow channel so as to be subjected to the pressure acting in said flow channel, said valve element further including a biasing member biasing said sealing member towards said one position.
Claim 2
Dependent Claim
256 words
A hydraulic valve, comprising a valve body having a fluid inlet chamber, a user chamber arranged for communication with a user of the fluid admitted into said valve body, a fluid return chamber for recovering fluid from the user, a flow channel arranged for communication with a source of fluid and with said fluid inlet chamber, and a passage connecting said chambers; a spool movably mounted in said passage, said spool having a first position in which said user chamber is in communication with said fluid inlet chamber and is sealed from said return chamber, and said spool having a spool position in which said user chamber is in communication with said return chamber and is sealed from said inlet chamber; and a valve element for selectively sealing said inlet chamber from said flow channel and for selectively providing communication between said inlet chamber and said flow channel, said valve element including a movable sealing member which is arranged in said flow channel, and said sealing member having one position in which said inlet chamber is sealed from said flow channel and another position in which said inlet chamber communicates with said flow channel, said sealing member being provided with a conduit having a pair of ends which open to said flow channel, and said sealing member having a face which is exposed to said flow channel so as to be subjected to the pressure acting in said flow channel, said valve element further including a biasing member biasing said sealing member towards said one position.
Claim 3
Dependent Claim
30 words
A hydraulic valve as defined in claim 1, wherein said passage extends in longitudinal direction of said valve body and said spool is mounted for movement in said longitudinal direction.
Claim 4
Dependent Claim
29 words
A hydraulic valve as defined in claim 1, wherein said sealing member is of tubular configuration and is arranged so that said conduit constitutes part of said flow channel.
Claim 5
Dependent Claim
39 words
A hydraulic valve as defined in claim 1, said valve body having a pair of opposite sides spaced by the width of said valve body; and wherein said flow channel extends between and opens to both of said sides.
Claim 6
Dependent Claim
66 words
A hydraulic valve as defined in claim 4, said sealing member being of tubular configuration and being arranged so that said conduit constitutes part of said flow channel, and said valve element acting as a check valve; and wherein said passage extends in longitudinal direction of said valve body and said spool is mounted for movement in said longitudinal direction, said biasing member comprising a spring.
Claim 7
Dependent Claim
49 words
A hydraulic valve as defined in claim 1, wherein said valve body comprises an additional channel which extends across said flow channel and constitutes an extension of said inlet chamber, said additional channel and said inlet chamber being arranged so as to have at least one common cross-sectional plane.
Claim 8
Dependent Claim
83 words
A hydraulic valve as defined in claim 1, said flow channel including first and second portions of different inner diameter; and wherein said sealing member is of tubular configuration and comprises first and second sections which guide said sealing member in said flow channel, said first section of said sealing member being arranged at least in part in said first portion of said flow channel and said second section of said sealing member being arranged in said second portion of said flow channel.
Claim 9
Dependent Claim
127 words
A hydraulic valve as defined in claim 7, said valve body comprising an additional channel which extends across the larger of said portions of said flow channel and constitutes an extension of said inlet chamber, and said additional channel and said inlet chamber being arranged so as to have at least one common cross-sectional plane; and wherein an abutment for limiting the movement of said sealing member is fixedly mounted in the larger of said portions of said flow channel and said flow channel is provided with a step at the transition between said first and second portions thereof, said biasing member bearing against said step and against the larger of said sections of said sealing member to thereby bias said sealing member towards said one position.
Claim 10
Dependent Claim
29 words
A hydraulic valve as defined in claim 8, wherein said additional channel, as seen in cross-section, is arranged in the same half of said valve body as said abutment.
Claim 11
Dependent Claim
63 words
A hydraulic valve as defined in claim 1, said valve body including an additional user chamber and being provided with connecting portions for connecting said user chambers with users of the fluid admitted into said valve body; and wherein said flow channel is arranged between said spool and said connecting portions and is also substantially symmetrically arranged with respect to said user chambers.