Fluent material handling – with receiver or receiver coacting mea – With signal – indicator – recorder – inspection means or exhibitor
Patent
1990-08-31
1991-08-20
Cusick, Ernest G.
Fluent material handling, with receiver or receiver coacting mea
With signal, indicator, recorder, inspection means or exhibitor
141 65, 141258, 73 47, 73 493, 92 5R, B67D 532, G01M 316
Patent
active
050405799
ABSTRACT:
In a liquid filling machine having a metering cylinder, a piston accommodated in the cylinder with a clearance formed therebetween, and a membrane closing each open end of the clearance to form a closed space, a device for detecting a leak in the metering cylinder comprising a vacuum pipe connected to the metering cylinder in communication with the closed space, an orifice plate inserted in the vacuum pipe for maintaining the interior portion of the pipe upstream from the orifice plate at a pressure lower than a predetermined value when the membrane has no leak with a standard quantity of leakage fluid flowing through the pipe and maintaining the interior portion at a pressure not lower than the predetermined value when the membrane has a leak, and a pressure sensor for detecting the pressure of the upstream interior portion of the pipe and producing a leak detection signal when the detected pressure is not lower than the predetermined pressure.
REFERENCES:
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patent: 2352350 (1944-06-01), Smith
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patent: 3800586 (1974-04-01), DeLatorre et al.
patent: 4281777 (1981-08-01), Akens
patent: 4413647 (1983-11-01), De Lorenzo et al.
patent: 4569378 (1986-02-01), Bergandy
Kawamura Seizo
Saijo Yoshihiro
Cusick Ernest G.
Jacyna Casey
Shikoku Kakoki Co. Ltd.
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