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Title: Flow control valve

Patent ·
OSTI ID:6255263

An apparatus is described for controlling discharge of fuel vapor from a fuel tank, the apparatus comprising a housing communicating with the fuel tank and defining an interior region, the housing being formed to include an inlet for receiving fuel vapor in the interior region from the fuel tank and an outlet for discharging fuel vapor from the interior region to a vapor recovery device, a flow baffle positioned in the interior region in spaced-apart relationship with the housing to define an annular space providing an outer flow passageway, the flow baffle being formed to include an inner flow passageway and a low flow orifice communicating fuel vapor to the inner flow passageway orifice, a valve member formed to include a high flow orifice having a diameter greater than that of the low flow orifice, the valve member being movable in the interior region in response to fuel vapor pressure between an unblocking position out of engagement with the flow baffle so that fuel vapor passing through the high flow orifice flows along both the inner and outer flow passageways and a blocking position engaging the flow baffle so that fuel vapor flowing through the high flow orifice flows only through the inner flow passageway to reduce the flow of fuel vapor to the vapor recovery device, and means for yieldably biasing the valve member toward the unblocking position.

Assignee:
Stant Manufacturing Inc., Connersville, IN (United States)
Patent Number(s):
US 5234022; A
Application Number:
PPN: US 7-959153
OSTI ID:
6255263
Resource Relation:
Patent File Date: 9 Oct 1992
Country of Publication:
United States
Language:
English