Hand-held fuel cap leakage tester
First Claim
1. A fuel cap leakage tester comprising:
- a fuel cap support formed to include a test chamber and adapted to receive a fuel cap to be tested in the test chamber to establish a pressurizable region therein and a sealed connection between the fuel cap to be tested and the fuel cap support, a pressure source, a monitor positioned to communicate with the pressurizable region formed in the fuel cap support and configured to measure air pressure in the pressurizable region, and means for communicating a flow of pressurized air from the pressure source to the pressurizable region with a predetermined pressure drop of the pressurized air therebetween to cause the pressure level of the pressurized air in the pressurizable region to be less than the pressure level of the pressurized air in the pressure source so that the monitor measures the pressure level of the pressurized air in the pressurizable region during discharge of the pressurized air from the pressurizable region through an air leak path between the fuel cap to be tested and the fuel cap support at an unknown flow rate to determine whether the unknown flow rate associated with the fuel cap to be tested meets or exceeds a predetermined leakage flow rate to establish that the sealed connection between the fuel cap to be tested and the fuel cap support complies with a predetermined fuel cap leakage rate specification.
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Accused Products
Abstract
A fuel cap leakage tester is provided comprising a fuel cap support, a pressure source, and a monitor. The fuel cap support is formed to included a test chamber and is adapted to receive a fuel cap to be tested in the test chamber to establish a pressurizable region, therein and a sealed connection between the fuel cap to be tested and the fuel cap support. The monitor is positioned to communicate with the pressurizable region formed in the fuel cap support and is configured to measure air pressure in the pressurizable region. The fuel cap leakage tester further comprises a system for communicating a flow of pressurized air from the pressure source to the pressurizable region with a predetermined pressure drop of the pressurized air therebetween. The monitor measures the pressure level of the pressurized air in the pressurizable region to determine whether the fuel cap to be tested meets or exceeds a predetermined leakage flow rate.
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Citations
44 Claims
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1. A fuel cap leakage tester comprising:
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a fuel cap support formed to include a test chamber and adapted to receive a fuel cap to be tested in the test chamber to establish a pressurizable region therein and a sealed connection between the fuel cap to be tested and the fuel cap support, a pressure source, a monitor positioned to communicate with the pressurizable region formed in the fuel cap support and configured to measure air pressure in the pressurizable region, and means for communicating a flow of pressurized air from the pressure source to the pressurizable region with a predetermined pressure drop of the pressurized air therebetween to cause the pressure level of the pressurized air in the pressurizable region to be less than the pressure level of the pressurized air in the pressure source so that the monitor measures the pressure level of the pressurized air in the pressurizable region during discharge of the pressurized air from the pressurizable region through an air leak path between the fuel cap to be tested and the fuel cap support at an unknown flow rate to determine whether the unknown flow rate associated with the fuel cap to be tested meets or exceeds a predetermined leakage flow rate to establish that the sealed connection between the fuel cap to be tested and the fuel cap support complies with a predetermined fuel cap leakage rate specification. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A fuel cap leakage tester comprising:
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a fuel cap support formed to include a test chamber and adapted to receive a fuel cap to be tested in the test chamber to establish a pressurizable region therein and a sealed connection between the fuel cap to be tested and the fuel cap support, a pressure source, a monitor positioned to communicate with the pressurizable region formed in the fuel cap support and configured to measure air pressure in the pressurizable region, and means for communicating a flow of pressurized air between a pressure source to the pressurizable region, the communicating means including a passage extending between the pressure source and having a flow area and a flow restrictor positioned to lie in the passage and having a predetermined flow area less than the flow area of the passage so that the monitor measures the pressure level of the air in the pressurizable region during discharge of the pressurized air from the pressurizable region through an air leak path between the fuel cap to be tested and the fuel cap support at an unknown flow rate to determine whether the unknown flow rate associated with the fuel cap to be tested meets or exceeds a predetermined leakage flow rate to establish that the sealed connection between the fuel cap to be tested and the fuel cap support complies with a predetermined fuel cap leakage rate specification. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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36. A fuel cap leakage tester comprising:
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a measuring device including a fuel cap support formed to include a pressurizable region and a monitor in communication with the pressurizable region, an air supply coupled to the measuring device, and a case having a central axis, a body portion configured to receive the air supply and having a length extending along the central axis, and a handle portion cantilevered to the body portion away from the central axis. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43)
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44. A fuel cap leakage tester comprising:
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a fuel cap support formed to include a test chamber and adapted to receive a fuel cap to be tested in the test chamber to establish a pressurizable region therein and a sealed connection between the fuel cap to be tested and the fuel cap support, a pressure source, a monitor positioned to communicate with the pressurizable region formed in the fuel cap support and configured to measure a rate of air flow through the pressurizable region, and means for communicating a flow of pressurized air from the pressure source to the pressurizable region with a predetermined pressure drop of the pressurized air therebetween to cause the pressure level of the pressurized air in the pressurizable region to be less than the pressure level of the pressurized air in the pressure source so that the monitor measures the rate of air flow of the pressurized air through the pressurizable region during discharge of the pressurized air from the pressurizable region through an air leak path between the fuel cap to be tested and the fuel cap support at an unknown flow rate to determine whether the unknown flow rate associated with the fuel cap to be tested meets or exceeds a predetermined leakage flow rate to establish that the sealed connection between the fuel cap to be tested and the fuel cap support complies with a predetermined fuel cap leakage rate specification.
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Specification