Freezing resistant liquid filter
A freezing resistant liquid filter including a housing having a liquid inlet and a liquid outlet and a freezing compensating filter element disposed within the housing and including a folded filter medium having a plurality of interstices and freezing compressible elements located at the interstices.
1. A freezing resistant liquid filter comprising: a housing having a liquid inlet and a liquid outlet; and a freezing compensating filter element disposed within said housing, said freezing compensating filter element including:
a folded filter medium having a plurality of interstices, said plurality of interstices being located between folds of said folded filter medium and on a radially outward facing side thereof; and
compressible elements located at least partially within said plurality of interstices.
2. A freezing resistant liquid filter according to claim 1 and wherein said freezing compensating filter element also comprises channel elements retaining said ompressible elements in said plurality of interstices.
3. A freezing resistant liquid filter according to claim 1 and wherein said compressible elements are formed to have a cross-section which generally corresponds to the cross-section of said plurality of interstices.
4. A freezing resistant liquid filter according to claim 2 and wherein said compressible elements are formed to have a cross-section which generally corresponds to the cross-section of said plurality of interstices.
5. A freezing resistant liquid filter according to claim 2 and wherein said channel elements define configurations of said compressible elements in both compressed and non-compressed operative orientations.
6. A freezing resistant liquid filter according to claim 4 and wherein said channel elements define configurations of said compressible elements in both compressed and non-compressed operative orientations.
7. A freezing compensating filter element for use in a freezing resistant liquid filter, said freezing compensating filter element including:
a folded filter medium having a plurality of interstices, said plurality of interstices being located between folds of said folded filter medium and on a radially outward facing side thereof; and
compressible elements located at least partially within said plurality of interstices.
8. A freezing compensating filter element according to claim 7 and wherein said freezing compensating filter element also comprises channel elements retaining said ompressible elements in said plurality of interstices.
9. A freezing compensating filter element according to claim 7 and wherein said ompressible elements are formed to have a cross-section which generally corresponds to the cross-section of said plurality of interstices.
10. A freezing compensating filter element according to claim 8 and wherein said ompressible elements are formed to have a cross-section which generally corresponds to the cross-section of said plurality of interstices.
11. A freezing compensating filter element according to claim 8 and wherein said channel elements define configurations of said compressible elements in both compressed and non-compressed operative orientations.
12. A freezing compensating filter element according to claim 10 and wherein said channel elements define configurations of said compressible elements in both compressed and non-compressed operative orientations.
13. A freezing compensating filter element according to claim 8 and wherein said channel elements form part of an integrally formed channel defining element having top and bottom rings.