US 6,852,141 B2 · Filter element having center piece and methods

Abstract

A core construction for use in a filter element includes a tubular member having a wall with opposite first and second ends. The first end is adaptable for engagement with structure, such as a frame utilized with a filter element. The second end is also engageable with external structure, such as a handle. Preferably, a filter element is constructed by rolling a media construction around the core construction. The media construction includes a corrugated sheet secured to a flat sheet rolled around the core construction into a coiled construction. The coiled construction has inlet flutes and outlet flutes. Methods for using and assembling filter elements preferably use core constructions as described herein.

Claims20

Dependent claims

A filter element comprising:

(a) a core construction comprising a tube having a wall with opposite first and second ends;
(i) said core construction first end including a hook construction;
(A) said hook construction including at least a first hook;
(ii) said core construction second end defining at least one void in said wall;
and
(b) a media construction comprising a corrugated sheet secured to a flat sheet rolled around said core construction into a coiled construction;
the coiled construction having a plurality of flutes, a first end, and an opposite second end;
(i) said plurality of flutes comprising inlet flutes and outlet flutes;
(A) said inlet flutes being open at portions adjacent to said first end and closed at portions adjacent to said second end;
and said outlet flutes being closed at portions adjacent to said first end and open at portions adjacent to said second end.

7 more elements

A filter element comprising:

(a) a core construction comprising a tube having a wall with opposite first and second ends;
(i) said first end including a hook construction and a projecting rib extending radially from said wall;
and
(ii) said second end including at least one structure-receiving void;
(b) a media construction comprising a corrugated sheet secured to a flat sheet rolled around said core construction into a coiled construction;
the coiled construction having a plurality of flutes, a first end, and an opposite second end;
(i) said plurality of flutes comprising inlet flutes and outlet flutes;
(A) said inlet flutes being open at portions adjacent to said first end and closed at portions adjacent to said second end;
and said outlet flutes being closed at portions adjacent to said first end and open at portions adjacent to said second end;
(c) a frame and a seal member;
said frame securing said seal member to said coiled construction;
said frame having a skirt, an axial extension, and a central hub;
(i) said skirt circumscribing and securing said frame to said coiled construction;
(ii) said axial extension projecting axially from said second end of said coiled construction;
said axial extension having an annular portion;
(A) said annular portion of said axial extension supporting said first member to orient said first member in a radial direction;
and
(iii) said hook construction engaging said central hub to secure said frame to said core construction;
(A) said central hub being trapped between said hook construction and said projecting rib;
(d) a handle secured to said core construction by snap engagement between said handle and said at least one void.

17 more elements

Dependencies are inferred from the claim text.

Filter element having center piece and methods

Life of this patent

Filter element having center piece and methods

Life of this patent

Abstract

Claims20