US3572509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tissue roll oil filter assembly
Assignee: HALL IRA B 8433 EAST CAMINO VIVAZ SCOTTSDALE AZ 85255
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Filing: 1969-06-19
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Granted: 1971-03-30
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Expires: 1989-06-19
Abstract
Abstract A full flow oil filter that uses a roll type, disposable tissue cartridge and that employs ''''spin on'''' external attachment to an existing engine and that has a resiliently biased, valve controlled, bypass means for providing continuous oil flow notwithstanding possible oil flow stoppage through the tissue cartridge and that has structure for providing gradient density filtering by the tissue cartridge.
Inventors
- 👤 Rolland W Dexter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:42
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
368 words
A tissue roll oil filter assembly comprising: a hollow housing having an opening in one end for holding a tissue roll; an end cap for closing said opening, which cap has inlet and outlet holes; means in said housing for directing oil flow through said tissue roll from said inlet holes to said outlet hole; at least one bypass channel interconnecting said inlet and outlet holes for bypassing oil from passing through the tissue roll; valve means for opening said bypass channel only when the oil pressure in said inlet holes exceeds a given pressure; said oil flow-directing means includes a tube positioned axially in said housing; said tissue roll oil filter having a centered opening that fits over said tube in the operative position, whereby the oil flows from said inlet holes longitudinally through said tissue roll and through the internal volume of said tube to said outlet hole; said tube has openings adjacent said inlet and outlet holes; said valve means includes a valve that controls oil flow through said tube openings; said valve comprises a sleeve that is capable of moving vertically in said tube between said first and second positions, and in said first position said sleeve closes off oil flow through said tube openings; resilient biasing means for biasing said sleeve to said first position; an internal valve seat positioned in said tube adjacent said tube openings for coacting with the internal edge of one end of said sleeve in said first position for preventing oil flow through said tube openings and into said tube; the oil passing through said inlet holes passes through said tube openings to contact the remaining area of the said one end of said sleeve, whereby when the oil pressure exceeds a given pressure, the force on said end area moves said sleeve against said resilient biasing means from said first position to said second position; said resilient biasing means comprises a spiral spring that fits in said tube and bears against the other end of said sleeve; the closed end of said housing has a centered open projection that threadably engages one end of said tube; and the other end of said spring bears against said projection.
Claim 2
Dependent Claim
368 words
A tissue roll oil filter assembly comprising: a hollow housing having an opening in one end for holding a tissue roll; an end cap for closing said opening, which cap has inlet and outlet holes; means in said housing for directing oil flow through said tissue roll from said inlet holes to said outlet hole; at least one bypass channel interconnecting said inlet and outlet holes for bypassing oil from passing through the tissue roll; valve means for opening said bypass channel only when the oil pressure in said inlet holes exceeds a given pressure; said oil flow-directing means includes a tube positioned axially in said housing; said tissue roll oil filter having a centered opening that fits over said tube in the operative position, whereby the oil flows from said inlet holes longitudinally through said tissue roll and through the internal volume of said tube to said outlet hole; said tube has openings adjacent said inlet and outlet holes; said valve means includes a valve that controls oil flow through said tube openings; said valve comprises a sleeve that is capable of moving vertically in said tube between said first and second positions, and in said first position said sleeve closes off oil flow through said tube openings; resilient biasing means for biasing said sleeve to said first position; an internal valve seat positioned in said tube adjacent said tube openings for coacting with the internal edge of one end of said sleeve in said first position for preventing oil flow through said tube openings and into said tube; the oil passing through said inlet holes passes through said tube openings to contact the remaining area of the said one end of said sleeve, whereby when the oil pressure exceeds a given pressure, the force on said end area moves said sleeve against said resilient biasing means from said first position to said second position; said resilient biasing means comprises a spiral spring that fits in said tube and bears against the other end of said sleeve; the closed end of said housing has a centered open projection that threadably engages one end of said tube; and the other end of said spring bears against said projection.
Claim 3
Dependent Claim
34 words
A tissue roll oil filter as claimed in claim 1 in which, said centered projection has openings through its sides for passing oil from said tissue roll to an internal passage in said tube.
Claim 4
Dependent Claim
60 words
A tissue roll oil filter as claimed in claim 2 in which: said closed end of said housing has radially directed ribs against which one end of said tissue roll abuts in the operative position; a filter screen positioned between said ribs and tissue roll; and each of said ribs have at least one opening therethrough for passing oil flow.
Claim 5
Dependent Claim
226 words
A tissue roll oil filter comprising: a hollow housing having an opening in one end for holding a tissue roll; an end cap for closing said opening, which cap has inlet and outlet holes; means in said housing for directing oil flow through said tissue roll from said inlet holes to said outlet hole; at least one bypass channel interconnecting said inlet and outlet holes for bypassing oil from passing through the tissue roll; valve means for opening said bypass channel only when the oil pressure in said inlet holes exceeds a given pressure; said oil flow directing means includes a tube positioned axially in said housing; said tissue roll oil filter having a centered opening that fits over said tube in the operative position, whereby the oil flows from said inlet holes longitudinally through said tissue roll and through the internal volume of said tube to said outlet hole; said tube has openings adjacent said inlet and outlet holes, said valve means includes a pressure responsive valve that controls oil flow through said tube opening; and the inner surface of said housinG having progressively increase in diameter from said closed end to said open end, whereby said tissue roll is progressively squeezed radially inwardly along substantially the longitudinal length thereof providing a filter having an increasing density from said inlet holes to said outlet holes.
Claim 6
Dependent Claim
226 words
A tissue roll oil filter comprising: a hollow housing having an opening in one end for holding a tissue roll; an end cap for closing said opening, which cap has inlet and outlet holes; means in said housing for directing oil flow through said tissue roll from said inlet holes to said outlet hole; at least one bypass channel interconnecting said inlet and outlet holes for bypassing oil from passing through the tissue roll; valve means for opening said bypass channel only when the oil pressure in said inlet holes exceeds a given pressure; said oil flow directing means includes a tube positioned axially in said housing; said tissue roll oil filter having a centered opening that fits over said tube in the operative position, whereby the oil flows from said inlet holes longitudinally through said tissue roll and through the internal volume of said tube to said outlet hole; said tube has openings adjacent said inlet and outlet holes, said valve means includes a pressure responsive valve that controls oil flow through said tube opening; and the inner surface of said housinG having progressively increase in diameter from said closed end to said open end, whereby said tissue roll is progressively squeezed radially inwardly along substantially the longitudinal length thereof providing a filter having an increasing density from said inlet holes to said outlet holes.
Claim 7
Dependent Claim
99 words
A tissue roll oil filter as claimed in claim 4 in which, the radial distance between the outer surface of said tube and the inner surface of said housing adjacent the closed end of said housing is less than the radial distance between the outer surface of said tube and the inner surface of said housing adjacent the open end of said housing, whereby the end of the tissue roll adjacent said closed end of said housing is radially squeezed between said housing and said tube and the other end of the tissue roll is capable of radial expansion.
Claim 8
Dependent Claim
42 words
A tissue roll oil filter as claimed in claim 5 in which, the end of said tube adjacent the closed end of said cylinder has a larger outer circumference than the end of said tube adjacent said open end of said cylinder.
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |