Pneumatic send/receive terminal
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United States of America Patent
Stats
-
Apr 28, 1987
Grant Date -
N/A
app pub date -
Feb 14, 1986
filing date -
Feb 14, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pneumatic tube send/receive terminal has a dispatch carrier that is movable between a load position and a send position. A sprocket chain fits on two sprockets and rotates under motor power, and a cam is mounted on the chain. A clapper valve or cover is hinged to a trolley or carriage that also rotatably holds the dispatch holder. A block or cog attached to the chain connects to the dispatch holder, and this rotates the same 180 degrees and then moves the trolley and the dispatch holder laterally to the send position. The cam rides a camway on the valve, and normally holds it shut, but when the chain is moved, the cam rotates over the camway and releases the valve so that it opens, and any received pneumatic carrier drops out. Rotation of the dispatch holder 180 degrees prevents inadvertent accessing the pneumatic tube with a second carrier in a single send operation.
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