A valve assembly for a tank of a vehicle is disclosed. A valve body is adapted to be attached to the tank. A seat is disposed inside the valve body and defines an outlet for venting the tank. A float is disposed inside the valve body and is movable between a first position and a second position rela
A valve assembly for a tank of a vehicle is disclosed. A valve body is adapted to be attached to the tank. A seat is disposed inside the valve body and defines an outlet for venting the tank. A float is disposed inside the valve body and is movable between a first position and a second position relative to the valve body in response to a liquid fluid level inside the tank. A support is coupled to the float and is movable with the float between the first and second positions. A sealing member is attached to the support and has an engagement portion supported by a base to define a space between the engagement portion and the support to allow movement of the engagement portion between an initial position when in the first position and a displaced position when in the second position.
대표청구항▼
1. A valve assembly comprising: a valve body including a seat, with the seat defining an outlet;a float disposed inside the valve body and movable between a first position and a second position relative to the valve body;a support coupled to the float and movable with the float between the first and
1. A valve assembly comprising: a valve body including a seat, with the seat defining an outlet;a float disposed inside the valve body and movable between a first position and a second position relative to the valve body;a support coupled to the float and movable with the float between the first and second positions; anda sealing member attached to the support and having a base abutting the support, with the sealing member having an engagement portion supported by the base to define a space contained between the base, the engagement portion and the support to allow movement of the engagement portion between an initial position when the float is in the first position and a displaced position when the float is in the second position, with the engagement portion spaced from the seat when in the initial position, and with the engagement portion engaging the seat when in the displaced position such that the space decreases in size and the engagement portion deforms about the seat to cover the outlet;wherein the float includes an attachment member, and wherein the support includes a coupler engaging the attachment member;wherein the support has a first side and a second side opposing the first side, with the base abutting one of the first and second sides of the support;wherein the support defines a first hole through the first and second sides such that the space is in fluid communication with inside of the valve body to equalize pressure between the space and the inside of the valve body when the engagement portion moves between the initial and displaced positions. 2. An assembly as set forth in claim 1 wherein the float includes a first end and a second end spaced from each other along a longitudinal axis, and wherein the base, the engagement portion and the first side of the support further define the space. 3. An assembly as set forth in claim 2 wherein the support defines a second hole through the first and second sides such that the space is in fluid communication with the inside of the valve body to equalize pressure between the space and the inside of the valve body when the engagement portion moves between the initial and displaced positions, with the first and second holes spaced from each other. 4. An assembly as set forth in claim 3 wherein the support includes a mounting portion to attach the sealing member to the support, with the first and second holes spaced from the mounting portion. 5. An assembly as set forth in claim 1 wherein the float includes a first column and a second column, with the attachment member and the first and second columns spaced from each other radially relative to a longitudinal axis, and wherein the support includes a first leg and a second leg spaced from the first leg, and wherein the first and second legs are each spaced from the coupler, with the first leg selectively engaging the first column and the second leg selectively engaging the second column to limit rotational movement of the support about the longitudinal axis to position the engagement portion of the sealing member relative to the seat. 6. An assembly as set forth in claim 5 wherein the float includes a first end and a second end spaced from each other along the longitudinal axis, and wherein the seat includes at least one rib extending outwardly away from the longitudinal axis, with the float including a ring spaced from the first end of the float and attached to at least one of the attachment member and the first and second columns, and with the ring surrounding the seat and the rib when the float is in the second position to assist in aligning the float along the longitudinal axis and minimize movement of the float transverse to the longitudinal axis. 7. An assembly as set forth in claim 1 wherein the float and the support includes a centering mechanism for centering the support relative to a longitudinal axis to position the engagement portion of the sealing member relative to the seat. 8. An assembly as set forth in claim 7 wherein the centering mechanism includes a cone extending outwardly from one of the float and the support to a distal end coaxial with the longitudinal axis. 9. An assembly as set forth in claim 8 wherein the centering mechanism defines a conical aperture extending into the other one of the float and the support to a distal surface coaxial with the longitudinal axis, with the cone disposed in the conical aperture for centering the sealing member relative to the longitudinal axis to position the engagement portion relative to the seat. 10. An assembly as set forth in claim 9 wherein the float includes a first end and a second end spaced from each other along the longitudinal axis, and wherein the support has a first side and a second side opposing the first side, with the float including the cone and the support defining the conical aperture, and wherein the cone extends outwardly from the first end of the float toward the second side of the support and the second side of the support defines the conical aperture extending toward the first side away from the float. 11. An assembly as set forth in claim 1 wherein the support includes a leg that extends from one end of the support and the coupler extends from another end of the support, with the ends of the support opposing each other such that the coupler is spaced from the leg, wherein the support includes a tail extending from the end of the support that opposes the coupler such that the tail generally counter-balances the coupler. 12. An assembly as set forth in claim 11 wherein the leg is further defined as a first leg, and the support includes a second leg, with the first and second legs extending from the end of the support that opposes the coupler, with the legs and the tail cooperating to counter-balance the coupler. 13. An assembly as set forth in claim 1 wherein: the float includes a first end and a second end spaced from each other along a longitudinal axis;the attachment member extends from the first end of the float to a distal end such that the distal end of the attachment member is spaced from the first end; andthe attachment member includes a stop disposed between the first end of the float and the distal end of the attachment member such that the stop is spaced from both of the first end and the distal end, with the stop configured to limit the amount of movement of the support along the longitudinal axis. 14. An assembly as set forth in claim 1 wherein the float includes a bulge completely surrounding an outer surface the float to face an inner surface of the valve body, with the bulge configured to minimize transverse movement of the float relative to a longitudinal axis. 15. An assembly as set forth in claim 1 wherein the valve body defines a cavity and includes a plate that splits the cavity into a first cavity portion and a second cavity portion, and wherein the seat is further defined as a first seat that extends from the plate into the first cavity portion, and wherein the float is disposed in the first cavity portion, and further including a head valve disposed in the second cavity portion, with the head valve including a second seat extending from the plate into the second cavity portion and a blocking member movably disposed relative to the second seat such that the blocking member selectively closes the outlet. 16. An assembly as set forth in claim 1 further including a centering mechanism that includes a cone extending outwardly from one of the float and the support to a distal end, and the centering mechanism defines a conical aperture extending into the other one of the float and the support to a distal surface, and wherein the cone is disposed in the conical aperture for centering the sealing member to position the engagement portion relative to the seat. 17. A valve assembly comprising: a valve body including a seat, with the seat defining an outlet;a float disposed inside the valve body and movable between a first position and a second position relative to the valve body;a support coupled to the float and movable with the float between the first and second positions; anda sealing member attached to the support and having a base abutting the support, with the sealing member having an engagement portion supported by the base to define a space between the engagement portion and the support to allow movement of the engagement portion between an initial position when the float is in the first position and a displaced position when the float is in the second position, with the engagement portion spaced from the seat when in the initial position, and with the engagement portion engaging the seat when in the displaced position such that the space decreases in size and the engagement portion deforms about the seat to cover the outlet;wherein the float includes an attachment member, and wherein the support includes a coupler engaging the attachment member;wherein the support has a first side and a second side opposing the first side, with the base abutting one of the first and second sides of the support;wherein the support defines a first hole through the first and second sides such that the space is in fluid communication with inside of the valve body to equalize pressure between the space and the inside of the valve body when the engagement portion moves between the initial and displaced positions;wherein the support includes a leg that extends from one end of the support and the coupler extends from another end of the support, with the ends of the support opposing each other such that the coupler is spaced from the leg, wherein the support includes a tail extending from the end of the support that opposes the coupler such that the tail generally counter-balances the coupler. 18. An assembly as set forth in claim 17 wherein the float and the support includes a centering mechanism for centering the support relative to a longitudinal axis to position the engagement portion of the sealing member relative to the seat. 19. An assembly as set forth in claim 17 wherein the leg is further defined as a first leg, and the support includes a second leg, with the first and second legs extending from the end of the support that opposes the coupler, with the legs and the tail cooperating to counter-balance the coupler. 20. An assembly as set forth in claim 17 wherein the float includes a first column and a second column spaced from each other to define one void between the first and second columns, with the attachment member and the first and second columns spaced from each other, and wherein the leg is disposed in the one void between the first and second columns. 21. An assembly as set forth in claim 17 wherein the support defines a plurality of apertures spaced from each other, with each of the apertures completely surrounded by a respective boundary wall, and wherein the sealing member includes a plurality of feet integral with the sealing member, and wherein each of the feet is located within a respective one of the apertures such that the feet are surrounded by the respective boundary wall to attach the sealing member to the support.
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이 특허에 인용된 특허 (38)
Mills Vaughn ; Bergsma Rudolph ; Waldorf Lindsey E. ; Benjey Robert P., Adjustable length vent valve system for fuel tanks.
Menage, Frederic S., Sealing method, new seal for components of fluid transfer systems, especially tubes, and their applications, especially in pumps and circuits for special fluids.
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