FLUID FLOW RESTRICTION INDICATOR

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United States of America Patent

SERIAL NO

12324365

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An indicator suitable for signaling restricted flow of a fluid through a filter mounted in a filter indicator includes a housing having an inner cavity. A diaphragm disposed within the housing separates the inner cavity into first and second chambers and deflects from a neutral position in response to applied pressures within the first and second chambers. A tab assembly opposite the diaphragm includes a spring-loaded flag moveable from a first position within the housing to a second position outside the housing. A pin operably coupled to the diaphragm holds the spring-loaded flag within the housing when the diaphragm is in the neutral position. In response to the diaphragm being deflected sufficiently from the neutral position to release the pin, the spring-loaded flag travels to the second position outside of the housing, thereby indicating a restrictive flow condition for the filter.

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Patent Owner(s)

Patent OwnerAddress
ENGINEERED PRODUCTS COMPANYWATERLOO IA

International Classification(s)

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  • 2008 Application Filing Year
  • G01F Class
  • 752 Applications Filed
  • 469 Patents Issued To-Date
  • 62.37 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances200820092010201120122013201420152016201720182019202020210255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Berry,, III Charles Henry Cedar Falls, US 1 6
Hammerand, H Dianne Vinton, US 4 23

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Patent Citation Ranking

  • 6 Citation Count
  • G01F Class
  • 3.59 % this patent is cited more than
  • 16 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges111797021126222101 - 1011 - 2021 - 3031 - 4041 - 5051 - 6071 - 8081 - 9091 - 1000102030405060708090100110120130140150160170180190

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