Fluent material handling – with receiver or receiver coacting mea – Evacuation apparatus
Patent
1994-04-15
1995-11-14
Jacyna, J. Casimer
Fluent material handling, with receiver or receiver coacting mea
Evacuation apparatus
141 51, 141 63, 141 70, 141 89, 118 315, A61B 5117
Patent
active
054657652
ABSTRACT:
A vacuum chamber is provided for the development of latent fingerprints, having a first and second end, and end plates sealing the first end, a removable end plate for sealing the second end to form a vacuum chamber by assembly of the wall end plates. In addition, the chamber wall and end plates define three passageways, a vacuum gauge passageway, an inlet passageway and an outlet passageway. The outlet passageway is connected to a conduit which is connected to the inlet of a vacuum pump. The outlet of the vacuum pump is connected to a conduit connected to a valve assembly, and the valve assembly is connected to a recycle conduit, and the recycle conduit is connected to the inlet passageway. The valve assembly has a first position whereby gases within the chamber are vented to the atmosphere and recycle is prevented, and a second position in which recycle of gases remaining in the chamber is permitted while venting to the atmosphere is prevented.
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patent: 5266112 (1993-11-01), Crosbie
patent: 5275215 (1994-01-01), Derby
Payton Scientific Inc. CYVAC Preliminary Instruction Manual, Feb. 1993.
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