초록 ▼

The vacuum tester has a housing which is small enough to be held in one hand in which is contained a small vacuum pump, an activator switch and a vacuum gauge. A non-return flap valve, or check valve, is disposed between the vacuum pump and the vacuum gauge so that the vacuum within the chamber unde

The vacuum tester has a housing which is small enough to be held in one hand in which is contained a small vacuum pump, an activator switch and a vacuum gauge. A non-return flap valve, or check valve, is disposed between the vacuum pump and the vacuum gauge so that the vacuum within the chamber under test is not lost once the vacuum pump has been turned off. A connector with a vacuum hose extending therefrom is provided to apply the vacuum to the chamber. Interchangeable adapters can be attached at the end of the vacuum hose to provide a seal with the opening in the chamber. Detection and quantization of leaks in closed systems is provided by observing the leak-back rate on the vacuum gauge once the vacuum pump has been turned off.

대표청구항 ▼

A vacuum leak tester for identifying the presence and severity of a leak in a closed system in a motor vehicle, said vacuum tester comprising: a venturi-type vacuum pump having a capacity for evacuating said closed system; a compressed air supply for creating a vacuum within said vacuum pump, said c

A vacuum leak tester for identifying the presence and severity of a leak in a closed system in a motor vehicle, said vacuum tester comprising: a venturi-type vacuum pump having a capacity for evacuating said closed system; a compressed air supply for creating a vacuum within said vacuum pump, said compressed air supply having an air hose connected thereto; a switch means for activating and deactivating said vacuum pump; a valve for preventing airflow into said closed system when it is evacuated; a vacuum gauge for measuring an amount of vacuum in said closed system; a first vacuum tube having a plurality of segments interconnecting said vacuum pump, said valve means and said vacuum gauge; a housing for containing said vacuum pump, said switch means, said valve, said vacuum gauge and said first vacuum tube, said housing having an inlet means connected to said vacuum pump adapted to mate with said air hose, said housing having dimensions whereby said housing can be held in one hand; and a second vacuum tube external to said housing and interconnected with a segment of said first vacuum tube which is connected to said valve at a first end of said second vacuum tube and with an adaptor at a second end of said second vacumm tube for applying the vacuum to said closed system; wherein the presence and severity of the leak is indicated by a leak-back rate measured by said vacuum gauge.