Vacuumized receptacle for sample collection
First Claim
1. A vacuumized vessel including, a valve including a positionable ball member having an outermost coating of a noble metal and supported by non-metallic seats.
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Accused Products
Abstract
A portable receptacle is vacuumized for use in taking an air or gas sample for subsequent examination to determine type, origin, components of the air or gas. Critical to a long shelf life of the vacuumized receptacle is a valve which virtually seals the receptacle for months or years permitting storage of the receptacle in a state ready for immediate use at a site. The valve utilizes a positionable member plated with a noble metal. A filter serves to collect particulate from the air or gas flow into the receptacle. A funnel shaped collector aids in the collection.
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Citations
14 Claims
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1. A vacuumized vessel including,
a valve including a positionable ball member having an outermost coating of a noble metal and supported by non-metallic seats.
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3. A receptacle for vacuumizing for subsequent collection of a sample of air or a gas for purposes of evaluation and including,
a portable main body defining a chamber, a valve assembly on said portable main body including a control for admitting ambient air or a gas into the chamber, a positionable member having an exterior outermost surface of a noble metal to effect a seal to maintain the receptacle in a vacuumized state when stored prior to use in the collection of a sample, and a filter assembly on said valve assembly in communication with an inlet serving said chamber, and including a filter element on which airborne particulate of the sample may be collected.
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6. A portable vacumized receptacle including,
a valve having a positionable ball member with an outermost surface of a noble metal.
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9. (canceled)
- 10. In a valve having a movable ball element, the improvement comprising, a control coupled to the ball element, valve seats in sealing contact with the ball element, said ball element having a noble metal outermost surface.
Specification