US3794170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter
Assignee: Denso Corp
•
Filing: 1971-08-17
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Granted: 1974-02-26
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Expires: 1991-08-17
Abstract
Abstract A filter wherein a closure member of the filter consists of a single sheet of plate and secured directly to a cylindrical body of the filter, with its peripheral edge tightened to the open edge of said cylindrical body in overlapping relation.
Inventors
- 👤 T Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:12
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/005; B01D27/08; B01D27/10; B01D27/106; Y; Y10; Y10S; Y10S210/00; Y10S210/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
316 words
A filter comprising a cylindrical body open at one end, means defining a peripheral edge at said end, a filter element disposed in said cylindrical body, and a closure member, said closure member having means defining a lubricating oil discharge opening centrally therethrough and means defining a plurality of oil inlet openings therethrough intermediate the edge thereof, annular check valve means disposed interiorly adjacent said closure member for blocking flow out of the cylindrical body through said plurality of openings whereby the lubricating oil to be filtered is admitted from said oil inlet openings into said cylindrical body through said check valve, passed through said filter element and discharged from said discharge opening, said closure member including a tubular, axially inwardly projecting internally threaded neck surrounding said discharge opening, said closure member including an integral plate element being relatively thick as it radiates from said neck, until reaching an extent corresponding to the internal diameter of the cylindrical body adjacent said peripheral edge thereof, whereupon said integral plate element undergoes a substantial reduction in thickness to provide a thin peripheral tightening rim for said edge, the difference in thickness of the integral plate element where it undergoes said substantial reduction in thickness providing a radially outwardly facing shoulder for abutment with the cylindrical body; said thIn peripheral tightening rim curled and tightly fitted over the peripheral edge of the open end of said cylindrical body in overlapping relation therewith, means defining an annular groove exteriorly in said closure member, the depth of said groove being within the thickness of said plate and said groove being configured for receiving an annular gasket, said closure member also comprising on the inner surface thereof an annular protrusion defining a seat for engaging the outer peripheral portion of said check valve, the inner peripheral edge of said check valve being fixed onto the root portion of said internally threaded neck.
Claim 2
Dependent Claim
316 words
A filter comprising a cylindrical body open at one end, means defining a peripheral edge at said end, a filter element disposed in said cylindrical body, and a closure member, said closure member having means defining a lubricating oil discharge opening centrally therethrough and means defining a plurality of oil inlet openings therethrough intermediate the edge thereof, annular check valve means disposed interiorly adjacent said closure member for blocking flow out of the cylindrical body through said plurality of openings whereby the lubricating oil to be filtered is admitted from said oil inlet openings into said cylindrical body through said check valve, passed through said filter element and discharged from said discharge opening, said closure member including a tubular, axially inwardly projecting internally threaded neck surrounding said discharge opening, said closure member including an integral plate element being relatively thick as it radiates from said neck, until reaching an extent corresponding to the internal diameter of the cylindrical body adjacent said peripheral edge thereof, whereupon said integral plate element undergoes a substantial reduction in thickness to provide a thin peripheral tightening rim for said edge, the difference in thickness of the integral plate element where it undergoes said substantial reduction in thickness providing a radially outwardly facing shoulder for abutment with the cylindrical body; said thIn peripheral tightening rim curled and tightly fitted over the peripheral edge of the open end of said cylindrical body in overlapping relation therewith, means defining an annular groove exteriorly in said closure member, the depth of said groove being within the thickness of said plate and said groove being configured for receiving an annular gasket, said closure member also comprising on the inner surface thereof an annular protrusion defining a seat for engaging the outer peripheral portion of said check valve, the inner peripheral edge of said check valve being fixed onto the root portion of said internally threaded neck.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |