Load multiplying mechanisms
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United States of America Patent
Stats
-
Dec 1, 1981
Grant Date -
N/A
app pub date -
Aug 20, 1979
filing date -
Aug 26, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pneumatically operated press in which the moving press plunger (13) is actuated by a toggle linkage (20, 21, 22) which is itself actuated by a second toggle linkage (30, 31, 32). The end link (31) of this second linkage is actuated by a large diameter pneumatic ram (34) while the pivotal point (32) of this second toggle linkage is connected to a relatively small diameter pneumatic ram (36), or some other actuator. An automatic switch (42, 32) engages a valve to admit air to the larger ram (34) when the smaller ram (36) has moved the second toggle (30, 31) into an in-line position. The ram (36) may be replaced by a manual operating lever.
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