US3833124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Immersion type strainer
Assignee: Nifco Inc
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Filing: 1973-10-03
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Granted: 1974-09-03
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Expires: 1993-10-03
Abstract
Abstract Disclosed is an improved immersion type strainer which is suitable particularly for use in a fuel tank of an automobile. The unique design of the pipe and associated female piece assures a loose-free connection between the pipe and the filter housing even if the strainer is subjected to continuous vibration or recurrent impacts.
Inventors
- 👤 M Sugiyama
- 👤 A Mizusawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:39
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D35/027; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D2201/00; B01D2201/40; B01D2201/4084
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
125 words
An immersion type strainer comprising, filter housing having a top plate with an opening therein, a pipe having a bulge portion and a female piece in the shape of a generally hollow cylinder, said female piece having a recess portion on the inner surface of the cylinder, said recess portion being of such a form as is complementary to said bulge portion, an annular collar portion around the outer surface of the cylinder and a raised portion in the vicinity of one end of the cylinder, the annular collar portion and the raised portion of said female piece being constructed and arranged to clampingly grip the top plate of said filter housing when said female piece is fitted in the opening of the top plate.
Claim 2
Dependent Claim
125 words
An immersion type strainer comprising, filter housing having a top plate with an opening therein, a pipe having a bulge portion and a female piece in the shape of a generally hollow cylinder, said female piece having a recess portion on the inner surface of the cylinder, said recess portion being of such a form as is complementary to said bulge portion, an annular collar portion around the outer surface of the cylinder and a raised portion in the vicinity of one end of the cylinder, the annular collar portion and the raised portion of said female piece being constructed and arranged to clampingly grip the top plate of said filter housing when said female piece is fitted in the opening of the top plate.
Claim 3
Dependent Claim
23 words
An immersion type strainer according to claim 1 wherein the other end of said female piece is of a divergent form in section.
Claim 4
Dependent Claim
18 words
An immersion type strainer according to claim 1 wherein said raised portion is composed of opposite tapered surfaces.
Claim 5
Dependent Claim
19 words
An immersion type strainer according to claim 1 wherein said raised portion is of a hook shape in section.
Claim 6
Dependent Claim
21 words
An immersion type strainer according to claim 1 wherein said one end of the cylinder has a plurality of longitudinal slits.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |