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Buoyant vent valve

a vent valve and buffer technology, applied in the field of vent valves, can solve the problems of fuel tanks, vehicle/automobile fuel tanks, fuel tank safety hazards, etc., and achieve the effects of reducing the risk of occupants of vehicles, and reducing the safety of vehicles

Inactive Publication Date: 2002-08-29
ILLINOIS TOOL WORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The buoyant vent valve effectively vents vapors, maintains pressure, and prevents fuel leakage during rollovers and overfill conditions, ensuring safety and integrity by isolating the fuel tank from external pressures and orientations, while reducing corrosion risks.

Problems solved by technology

Fuel tanks, and more particularly vehicle / automobile fuel tanks are subject to a great deal of scrutiny during the design phase.
These interfaces may become prone to corrosion, leakage and / or other factors that may compromise the safety and integrity of the vehicle.
Fuel within fuel tanks releases vapors that may be harmful to the environment and create a safety hazard to the occupants of the vehicle.

Method used

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Examples

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Embodiment Construction

[0029] FIGS. 1 and 2 show vent valve 10 according to one preferred embodiment of this invention. As shown schematically in FIG. 3, vent valve 10 is buoyant within fuel tank 80.

[0030] As shown in FIG. 3, vent valve 10 is designed to vent fuel vapors from an interior of a fuel tank 80 through a vent hose 70 that extends through sending unit 85 and ultimately to the exterior of fuel tank 80, such as to a charcoal filter 87 (not shown). An overview of several basic elements of vent valve 10 include: floating body 20 floatable within fuel tank 80; valve 30 positioned with respect to floating body 20; and vent hose 70 positioned with respect to valve 30 and extending between floating body 20 and sending unit 85.

[0031] Floating body 20 is preferably incorporated into vent valve 10 and comprises a buoyant material that is resistant to the corrosive environment present in a typical fuel tank, particularly a material that is resistant to gasoline.

[0032] Valve 30 is preferably positioned with ...

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PUM

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Abstract

A vent valve for a fuel tank having a sending unit positioned therethrough including a floating body floatable within the fuel tank and a valve positioned with respect to the floating body. A vent hose is positioned with respect to the valve, the vent hose extending between the floating body and the sending unit.

Description

[0001] 1. Field of the Invention[0002] This invention relates to a vent valve used in a fuel tank for venting vapor, shutting off fluid flow when the fuel tank is in an overfill condition and preventing fuel leakage in the event of a rollover.[0003] 2. Description of Related Art[0004] Fuel tanks, and more particularly vehicle / automobile fuel tanks are subject to a great deal of scrutiny during the design phase. Fuel tanks are formed in complex forming operations involving numerous layers of material that may lose integrity when layer continuity is interrupted. One such interruption takes place when a sending unit is positioned within a sidewall of the fuel tank. The sending unit includes electronics and diagnostics for the operation of the vehicle including a fuel level gauge and / or a fuel pump.[0005] In addition, vent valves are commonly used in fuel tanks to vent excess vapor from an interior of the fuel tank to an exterior of the fuel tank, usually to an external filter. Existing...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B60K15/035F16K24/04
CPCB60K15/03519B60K2015/03533F16K24/048Y10T137/0324Y10T137/86324Y10T137/3099Y10T137/0874
Inventor PARKER, ERIC G.LEVEY, KENNETHNOWAK, DAVID R.
Owner ILLINOIS TOOL WORKS INC