US Patent No: 7,204,150
Number of patents in Portfolio can not be more than 2000
Turbo sump for use with capacitive pressure sensor
Stats
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Apr 17, 2007
Issued date -
Jan 14, 2005
filing date -
11/036,775
serial no -
In Force
status
Importance
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Abstract
The disclosed pressure sensor includes a body, a diaphragm, and a flow defining structure. The body defines an interior volume. The diaphragm divides the interior volume into a first portion and a second portion. At least a first part of the diaphragm moves in a first direction when a pressure in the first portion increases relative to a pressure in the second portion. The first part of the diaphragm moves in a second direction when the pressure in the first portion decreases relative to the pressure in the second portion. The first part of the diaphragm and at least a first part of the body are characterized by a capacitance. The capacitance changes in response to movement of the first part of diaphragm relative to the first part of the body. The flow defining structure provides a fluid flow path from the first portion of the interior volume to a position outside of the internal volume. At least part of the fluid flow path extends from a first location to a second location. The at least part of the fluid flow path is characterized by a total length and a straight line distance. The total length is the shortest distance through the path from the first location to the second location. The straight line distance is the shortest distance between the first location and the second location. The total length is at least two times greater than the straight line distance.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,351,548 Capacitive pressure sensor | 26 | 1992 | |
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| 6,105,437 Pressure transducer | 42 | 1998 | |
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| 5,349,492 Capacitive pressure sensor | 56 | 1992 | |
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| 4,322,775 Capacitive pressure sensor | 43 | 1979 | |
| 4,691,574 Capacitance transducer | 18 | 1986 | |
| 4,738,276 Modular differential pressure transmitter/manifold for a fluid conveying pipeline | 47 | 1986 | |
| 5,134,887 Pressure sensors | 34 | 1989 | |
| 5,165,281 High pressure capacitive transducer | 23 | 1989 | |
| 5,279,163 Sensor and transducer apparatus | 30 | 1990 | |
| 5,499,533 Downhole pressure gauge converter | 19 | 1992 | |
| 5,400,489 Method of stabilizing the surface properties of objects to be thermally treated in a vacuum | 27 | 1992 | |
| 6,119,524 Measuring indicator device | 12 | 1999 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Oct 17, 2014 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 17, 2018 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |