Pressure sensor for a vapor recovery system
First Claim
1. A system for measuring vapor comprising:
- a) a vapor recovery path;
b) a flow restrictor positioned along said vapor recovery path;
c) a pressure sensor having first and second inputs for measuring a pressure change within said vapor recovery path, one of said inputs being positioned at said flow restrictor; and
d) a vapor sensor having an inlet and an outlet extending from said vapor recovery path for directing vapor through a testing zone, one of said inlets and outlets extending from said vapor recovery path at said flow restrictor.
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Accused Products
Abstract
A pressure sensor includes a pair of inputs for determining the pressure within a vapor recovery path. The inputs are positioned about a flow restrictor within the vapor recovery path. The vapor recovery path may include a mounting platform for attaching the pressure sensor and positioning the inputs relative to the flow restrictor. In one embodiment, a vapor sensor may also be positioned within the vapor recovery path. An inlet port and an outlet port direct vapor from the vapor recovery path to a sensor. The inlet and outlet ports are positioned relative to the flow restrictor for forcing the vapor through the sensor. In this embodiment, a common flow restrictor within the vapor recovery path may accommodate both the vapor sensor and the pressure sensor. If vapor is not being returned in the vapor return path properly, the fuel dispenser may set an alarm condition and/or shut down the fuel dispenser operation. If vapor is not being returned at the proper rate, the vapor pump speed may be adjusted, for example, to bring the vapor return rate to the proper level.
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Citations
17 Claims
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1. A system for measuring vapor comprising:
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a) a vapor recovery path;
b) a flow restrictor positioned along said vapor recovery path;
c) a pressure sensor having first and second inputs for measuring a pressure change within said vapor recovery path, one of said inputs being positioned at said flow restrictor; and
d) a vapor sensor having an inlet and an outlet extending from said vapor recovery path for directing vapor through a testing zone, one of said inlets and outlets extending from said vapor recovery path at said flow restrictor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11, 12, 13, 14)
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8. A device for measuring pressure within a vapor recovery system comprising:
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a) a vapor recovery path having an upstream end and a downstream end;
b) a flow restrictor positioned along said vapor recovery path between said upstream and downstream ends for creating a change in pressure within said vapor recovery path; and
c) a pressure sensor having a first input and a second input, one of said inputs being operatively connected to said vapor recovery path at said flow restrictor, said inputs measuring a pressure change within said vapor recovery path to determine a vapor recovery rate. - View Dependent Claims (9, 10, 15)
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16. A fuel delivery and vapor recovery system comprising:
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a) a fuel delivery path;
b) a vapor recovery path having an upstream end and a downstream end;
c) a vapor pump positioned along said vapor recovery path for creating a vacuum for drawing vapors into said upstream end to said downstream end;
d) a flow restrictor positioned along said vapor recovery path between said upstream and downstream ends for creating a change in pressure within said vapor recovery path; and
e) a pressure sensor having a first input and a second input, one of said inputs being operatively connected to said vapor recovery path at said flow restrictor, said inputs measuring a pressure change within said vapor recovery path.
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17. A fuel delivery and vapor recovery system comprising:
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a) a fuel delivery path;
b) a vapor recovery path having an upstream end and a downstream end;
c) a vapor pump positioned along said vapor recovery path for creating a vacuum for drawing vapors into said upstream end to said downstream end;
d) a flow restrictor positioned along said vapor recovery path between said upstream and downstream ends for creating a change in pressure within said vapor recovery path;
e) a pressure sensor having first and second inputs for measuring a pressure change within said vapor recovery path, one of said inputs being positioned at said flow restrictor; and
f) a vapor sensor having an inlet and an outlet extending from said vapor recovery path for directing vapor through a testing zone, one of said inlet and outlet extending from said vapor recovery path at said flow restrictor.
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Specification