Seal for cartridge-type filter assemblies
AssigneeCaterpillar Tractor Co.
InventorsAlbert W. Crumrine, Lawrence F. Fratzke
Life of this patent
Estimating the term…
Abstract
A filter assembly comprises a base having a cartridge-type filter and an impervious case mounted thereon. An open end of the case is disposed in an annular recess defined in the base. An annular sealing means is disposed within the recess and is compressed in sealing relationship therein by the case. The sealing means comprises an annular metallic insert having a U-shaped cross section and an annular elastomeric member molded as an integral part thereof. Outer sealing portions of the elastomeric member are compressed into sealing contact with top and sidewalls defining the recess and the case is automatically self-centered within sidewalls of the insert.
Claims17
A filter assembly having an inlet and an outlet comprising
- a base having an annular recess defined therein, said recess being generally U-shaped in cross section and defined by a bottom wall and a pair of sidewalls,
- a filter mounted on said base and disposed within the confines of said recess,
- a substantially impervious case having an open end mounted at said recess on said base, said filter disposed within said case, and
- annular sealing means disposed within said recess, between said base and the open end of said case, for automatically centering the open end of said case therein and for applying substantially equal sealing pressures against the bottom and sidewalls defining said recess.
A composite annular sealing means disposed in a horizontally disposed plane and adapted for use in filter assemblies and the like comprising;
- an annular metallic insert having a generally U-shaped cross section throughout the entire circumferential length thereof and defining an annular top wall disposed in parallel relationship relative to said plane and a pair of radially spaced sidewalls disposed at different radial distances from a center of said insert and connected to said top wall and disposed in at least generally perpendicular relationship relative to said plane,
- an annular elastomeric member, molded as an integral part of said insert, comprising an outer sealing portion disposed exteriorly on said top and sidewalls to define three contiguous sealing surfaces and a plurality of circumferentially disposed slots formed through at least one of the sidewalls of said insert and said elastomeric member.
A composite annular sealing means adapted for use in filter assemblies and the like comprising
- an annular metallic insert having a generially U-shaped cross section defining a top wall and a pair of sidewalls connected thereto.
- an annular elastomeric member, molded as an integral part of said insert, comprising an outer sealing portion disposed exteriorly on said top and sidewalls to define three contiguous sealing surfaces and
- a plurality of circumferentially disposed slots formed through at least one of the sidewalls of said insert and said elastomeric member.
Dependencies are inferred from the claim text.