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10/18/07 - USPTO Class 073 | 47 views | #20070240503 | Prev - Next | About this Page

Flow indicator and apparatus for monitoring particles in air

Title: Flow indicator and apparatus for monitoring particles in air

Brief Patent Description - Full Patent Description - Patent Claims

The Patent Description & Claims data below is from USPTO Patent Application 20070240503, Flow indicator and apparatus for monitoring particles in air.

1. A flow indicator comprising: a horizontally disposed housing comprising: a lower inlet port drawing in an air sample; an interior space passing the air sample; an upper outlet port exhausting the air sample; and, a transparent window allowing visual observation of at least a portion of the interior space; a floater disposed within the housing to move vertically in response to the flow of the air sample to indicate a flow rate for the air sample; and a guide member extending upward from a lower portion of the housing and guiding movement of the floater.

2. The flow indicator of claim 1, wherein the guide member extends upward along a central axis of the housing, and the floater comprises a central hole through which the guide member passes.

3. The flow indicator of claim 2, wherein a plurality of lower inlet ports is disposed radially around a center of the lower portion of the housing.

4. The flow indicator of claim 2, wherein the floater comprises: an inner panel having the central hole; an outer tube extending downward from an outer edge portion of the inner panel and separated from an inner surface of the housing; and, a guide tube extending downward from an inner portion of the inner panel and surrounding the guide member, wherein the guide tube guides the movement of the floater.

5. The flow indicator of claim 4, wherein the outer tube comprises: a first color tube having a first color, the first color tube extending downward from the outer edge portion of the inner panel; and, a second color tube having a second color different from the first color, the second color tube being coupled to a lower end of the first color tube.

6. The flow indicator of claim 4, wherein a gap between the guide tube and the guide member is less than about 0.1 mm.

7. The flow indicator of claim 2, further comprising: a stopper disposed at an upper portion of the guide member and limiting rise height of the floater.

8. The flow indicator of claim 2, further comprising: an exhaust pipe extending through the upper outlet port and exhausting the air sample.

9. The flow indicator of claim 8, wherein the exhaust pipe and the guide member are formed as a single piece; and, a plurality of holes is formed radially around a lower portion of the exhaust pipe disposed within the housing, wherein the housing exhausts the air sample through the plurality of holes.

Brief Patent Description - Full Patent Description - Patent Claims

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