Fluid filter assembly having a warning indicator

• US 3,312,187 A
• Filed: 02/02/1966
• Issued: 04/04/1967
• Est. Priority Date: 02/02/1966
• Status: Expired due to Term

• Current Assignee: Robert C. Mckinlay
• Original Assignee: Robert C. Mckinlay
• Inventors: Mckinlay, Robert C.
• Application Number:
  US04/524,417
• Time in Patent Office: 426 Days
• US Class Current: 116/268
• CPC Class Codes: F02M 35/09 Clogging indicators ; Diagnosis or testing of air cleaners sensors therefore F02M35/10373
• CPC Class Codes: Y10S 116/25 Air filter condition indicator
• CPC Class Codes: Y10S 55/28 Carburetor attached

Claims

1. IN A FLUID FILTER ASSEMBLY HAVING AN OUTER SHELL SURROUNDING A FILTERING MEMBER THROUGH WHICH FLUID PASSES, SAID SHELL AND SAID FILTERING MEMBER DEFINING AN ENCLOSURE, AND SAID SHELL HAVING AN APERTURE THERETHROUGH:

A WARNING INDICATOR DEVICE COMPRISING A MAIN BODY DEFINING A CHAMBER, SAID MAIN BODY HAVING A TOP STRUCTURAL PORTION AND A BOTTOM STRUCTURAL PORTION, SAID TOP STRUCTURAL PORTION HAVING A FIRST APERTURE THERETHROUGH, A FLEXIBLE DIAPHRAGMATIC MEMBER SEPARATING SAID CHAMBER INTO A FIRST CHAMBER PORTION PARTIALLY DEFINED BY SAID TOP STRUCTURAL PORTION AND A SECOND CHAMBER PORTION PARTIALLY DEFINED BY SAID BOTTOM STRUCTURAL PORTION, ELONGATE INDICATING MEANS OPERATIVELY CONNECTED TO SAID DIAPHRAGMATIC MEMBER AND SLIDABLY EXTENDING INTO SAID FIRST APERTURE, SAID WARNING INDICATOR DEVICE MOUNTED IN SAID ENCLOSURE SO THAT SAID FIRST APERTURE IN SAID TOP STRUCTURAL PORTION IS ALIGNED WITH SAID APERTURE IN SAID SHELL, SAID INDICATING MEANS HAVING AN AXIAL BORE EXTENDING THERETHROUGH COMMUNICATING WITH SAID SECOND CHAMBER PORTION AND THE ATMOSPHERE, AND SAID TOP STRUCTURAL PORTION HAVING A SECOND APERTURE THERETHROUGH COMMUNICATING BETWEEN SAID FIRST CHAMBER PORTION AND SAID ENCLOSURE.