Filter clogging indicator

• US 3,325,010 A
• Filed: 10/09/1963
• Issued: 06/13/1967
• Est. Priority Date: 10/09/1963
• Status: Expired due to Term

• Current Assignee: James W. Sackett
• Original Assignee: James W. Sackett
• Inventors: Sackett, James W.
• Application Number:
  US04/314,899
• Time in Patent Office: 1,343 Days
• US Class Current: 210/90
• CPC Class Codes: B01D 35/143 Filter condition indicators
• CPC Class Codes: B01D 35/147 Bypass or safety valves
• CPC Class Codes: Y10S 116/42 Oil filter

Claims

1. APPARATUS FOR INDICATING WHEN A FLUID FILTER IS CLOGGED, SAID FILTER HAVING AN INLET SIDE AND AN OUTLET SIDE AND MEANS FOR SUPPLYING FLUID TO THE INLET SIDE OF SAID FILTER UNDER PRESSURE THAT CAUSES THE FLUID TO FLOW THROUGH SAID FILTER WHEN IT IS UNCLOGGED AND THAT INCREASES WHEN THE FILTER IS CLOGGED, COMPRISING A CONDUIT BRANCHING FROM THE INLET SIDE OF SAID FILTER SO THAT A PORTION OF THE FLUID CAN PASS THROUGH SAID CONDUIT, THE CONDUIT BEING CONSTRUCTED AND ARRANGED SO THAT THE PORTION OF THE FLUID FLOWING THROUGH SAID CONDUIT INCREASES AS THE FILTER BECOMES CLOGGED, SAID CONDUIT HAVING A FIRST PORTION OF RELATIVELY LARGE CROSS SECTION AND A SECOND PORTION OF SMALLER CROSS SECTION DOWNSTREAM OF SAID FIRST PORTION, A FIRST PASSAGE MEANS HAVING ONE END CONNECTED TO SAID FIRST PORTION, A SECOND PASSAGE MEANS HAVING ONE END CONNECTED TO SAID SECOND PORTION, AND INDICATING MEANS, THE OTHER ENDS OF SAID FIRST AND SECOND PASSAGE MEANS BEING CONNECTED TO SAID INDICATING MEANS SO THAT THE LATTER INDICATES THE CLOGGED CONDITION OF SAID FILTER.