Fuel filter and priming pump

CAFC
  • US 5,643,446 A
  • Filed: 11/10/1993
  • Issued: 07/01/1997
  • Est. Priority Date: 05/14/1985
  • Status: Expired due to Term
First Claim
Patent Images

1. A filter for mounting to a filter head including a nipple portion having a valve element therein, said filter comprising:

  • a generally cylindrical housing having a central axis, a first open end and a second end;

    an annular ring of filter media in said housing surrounding said central axis, said filter media having first and second ends spaced along said central axis and separating a central chamber bounded by said media from a peripheral chamber surrounding said media;

    a first end cap including an annular portion attached to said media at the first end thereof, said annular portion surrounding and defining a central opening;

    a second end cap including an annular portion attached to said media ring at the second end thereof;

    one of said first and second end caps including a longitudinally extending support member surrounding said central axis and having a first end joined to the annular portion of said one of said first and second end caps and a second free end positioned between the annular portions of said first and second end caps;

    a longitudinally extending actuating projection mounted in said housing and positioned in said central chamber, said actuating projection having a free end and a base mounted with respect to said media, said free end of said actuating projection being closer to said first end of said housing than said base, and said base being directly supported by said second free end of said longitudinally extending support member and said actuating projection extending axially from said longitudinally extending support member parallel to said central axis;

    a tap plate at said first end of said housing, said tap plate including a threaded tap plate opening for threaded attachment to the nipple portion at external threads on the nipple portion, said tap plate opening being in diametrically centered alignment with said actuating projection;

    a first annular resilient seal extending between and in sealing relation with said tap plate and said first end cap, said first seal in surrounding relation of said first tap plate opening, said free end of said actuating projection being positioned interiorly of said housing;

    said first seal circumferentially bounding said central opening, and said free end of said actuating projection being smaller in transverse dimension than said central opening.

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