Centralized control mechanism with incorporated safety means for a device for a tight transfer between two closed volumes
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United States of America Patent
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Jun 6, 1995
Grant Date -
N/A
app pub date -
Sep 1, 1993
filing date -
Sep 4, 1992
priority date (Note) -
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Abstract
In a double door device for the tight transfer between two closed volumes a centralized control mechanism (28) having incorporated safety means is proposed. This mechanism (28) comprises a mobile control member (36), placed opposite to a hinge of one (22) of the doors and facing a part (42) connected to said door (22). The mechanism integrates four mechanical bolts (48,62,78,92). Two of them (48,62) prevent any opening manipulation when a second door is not present and when a second flange is not entirely connected to the flange carrying the control member (36). A third bolt (78) prevents any disconnection between the two flanges after the control member (36) has cleared an intermediate locking position. Finally, a fourth bolt (92) prevents the return of the control member (36) to its initial position when the doors are open. In a certain number of industrial fields, e.g. the nuclear, medical, pharmaceutical and electronic fields, it is necessary or desirable to carry out certain tasks in a confined atmosphere, either to protect personnel against certain dangers (radioactivity, toxicity, etc.) resulting from the product used during the performance of these tasks, or conversely in order to protect said tasks in a dust-free or aseptic atmosphere.
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