Dry vacuum diaphragm pump
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United States of America Patent
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-
Jun 5, 1984
Grant Date -
N/A
app pub date -
Jul 23, 1982
filing date -
Jul 24, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Dry vacuum diaphragm pump, for pumping between an inlet port (2) and an exhaust port (3), and comprising a tubular diaphragm (12) retained by its resilience on a central body (11) in the biconical interior volume of a body (1), in such manner as to form a pumping chamber (15) into which debouch inlet and exhaust ports, and a control chamber (16). Port (3) communicates through a valve (7) with a capacity (9) maintained under partial vacuum by an auxiliary vacuum pump (23). The distribution mechanism (20, 21, 27) places the chamber (16) in communication alternatively with atmosphere and with the intake of the auxiliary pump (23).
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