Discharge apparatus for broken-off fastener parts
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United States of America Patent
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Aug 14, 1990
Grant Date -
N/A
app pub date -
Feb 3, 1989
filing date -
Feb 5, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Discharge apparatus for discharging broken-off fastener parts (such as the stems of blind rivets) from fastener installation apparatus, comprises a passageway (13) along which the parts (37) are conveyed away from the installation apparatus (11) by a flow of air generated by a vacuum pump (14). The end of the passageway (13) remote from the installation apparatus (11) is normally sealed against the entry of air by a discharge valve (16). A broken-off part (37) approaching the discharge valve (16) is detected by an approach sensor (34) which is connected by a latching relay unit (33) and a control valve (25) to actuate a pneumatic ram (22) to open the discharge valve (16). At the same time the vacuum pump (14) is turned off to prevent a reverse flow of air through the open valve (16). The part (37) is discharged through the valve (16) and into a receptacle (19) which is outside the vacuum system. An exit sensor (35 ) beyond the valve (16) detects the discharged part and actuates the control valve (25) to close the discharge valve (16) and turn on again the vacuum pump (14).
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