US3900401A — Dual filter for lubricating oil

Claim 1

Independent Claim 333 words

A DUAL FILTERING DEVICE FOR LUBRICATING OIL COMPRISING, A HOUSING HAVING FIRST AND SECOND FILTERING SECTIONS SEPARATED BY A FLOW CONTROL SECTION, SAID FIRST AND SECOND FILTERING SECTIONS EACH BEING CLOSED AT ONE END AND HAVING AN OPENING AT THE OTHER END WITH A PLURALITY OF HOUSING LUGS DISPOSED ABOUT THE PERIPHERY OF EACH OPENING, SAID FLOW CONTROL SECTION HAVING AN INLET AND AN OUTLET FOR LUBRICATING OIL, AN APERTURE IN ONE OF SAID HOUSING LUGS, A SHAFT ROTATABLY POSITIONED IN SAID FLOW CONTROL SECTION, FIRST AND SECTION FILTER ELEMENTS POSITIONED ONE EACH IN SAID FIRST AND SECTION FILTERING SECTIONS, A FIRST VALVE POSITIONED IN SAID INLET AND CONNECTED WITH SAID SHAFT AND A SECOND VALVE POSITIONED IN SAID OUTLET AND CONNECTED WITH SAID SHAFT WHEREBY FLOW OF LUBRICATING OIL CAN BE SELECTIVELY PASSED THROUGH SAID FIRST AND SECOND FILTER ELEMENTS BY ROTATING SAID SHAFT, FIRST AND SECOND COVERS CLOSING THE OPENINGS, RESPECTIVELY, IN SAID FIRST AND SECOND FILTERING SECTION, EACH SAID COVER HAVING A PLUALITY OF COVEER LUGS ENGAGEABLE WITH SAID HOUSING LUGS TO LOCK SAID COVERS WITH SAID HOUSING WHEN SAID COVERS ARE ROTATED AND SAID COVER LUGS ARE POSITIONED BENEATH SAID HOUSING LUGS, A PIN IN EACH SAID COVER ADAPTABLE FOR ENGAGEMENT ONE EACH WITH ONE OF SAID APERTURES IN SAID HOUSING LUGS WHEREBY PRESSURE WITHIN EACH SAID FILTERING SECTION LIFTS SAID COVER ASSOCIATED THEREWITH AND SAID PIN ENTERS SAID APERTURE THEREBY PREVENTING ROTATION OF SAID COVER, A TIMING DISK ATTACHED TO SAID SHAFT, AND FIRST AND SECOND PAWLS PIVOTALLY ATTACHED TO SAID HOUSING AND ENGAGEABLE WITH SAID TIMING DISK TO PREVENT ROTATION OF SAID SHAFT, SAID FIRST PAWL BEING ENGAGEABLE WITH SAID FIRST COVER FOR BIASING SAID PAWL OUT OF ENGAGEMENT WITH SAID TIMING DISK AND SAID SECOND PAWL BEING ENGAGEABLE WITH SAID SECOND COVER FOR BIASING SAID PAWL OUT OF ENGAGEMENT WITH SAID TIMING DISK WHEREBY SAID SHAFT CAN ONLY BE ROTATED TO CONNECT SAID INLET AND OUTLET VALVES TO A FILTERING SECTION THAT HAS A COVER THEREON.

Claim 2

Dependent Claim 333 words

A DUAL FILTERING DEVICE FOR LUBRICATING OIL COMPRISING, A HOUSING HAVING FIRST AND SECOND FILTERING SECTIONS SEPARATED BY A FLOW CONTROL SECTION, SAID FIRST AND SECOND FILTERING SECTIONS EACH BEING CLOSED AT ONE END AND HAVING AN OPENING AT THE OTHER END WITH A PLURALITY OF HOUSING LUGS DISPOSED ABOUT THE PERIPHERY OF EACH OPENING, SAID FLOW CONTROL SECTION HAVING AN INLET AND AN OUTLET FOR LUBRICATING OIL, AN APERTURE IN ONE OF SAID HOUSING LUGS, A SHAFT ROTATABLY POSITIONED IN SAID FLOW CONTROL SECTION, FIRST AND SECTION FILTER ELEMENTS POSITIONED ONE EACH IN SAID FIRST AND SECTION FILTERING SECTIONS, A FIRST VALVE POSITIONED IN SAID INLET AND CONNECTED WITH SAID SHAFT AND A SECOND VALVE POSITIONED IN SAID OUTLET AND CONNECTED WITH SAID SHAFT WHEREBY FLOW OF LUBRICATING OIL CAN BE SELECTIVELY PASSED THROUGH SAID FIRST AND SECOND FILTER ELEMENTS BY ROTATING SAID SHAFT, FIRST AND SECOND COVERS CLOSING THE OPENINGS, RESPECTIVELY, IN SAID FIRST AND SECOND FILTERING SECTION, EACH SAID COVER HAVING A PLUALITY OF COVEER LUGS ENGAGEABLE WITH SAID HOUSING LUGS TO LOCK SAID COVERS WITH SAID HOUSING WHEN SAID COVERS ARE ROTATED AND SAID COVER LUGS ARE POSITIONED BENEATH SAID HOUSING LUGS, A PIN IN EACH SAID COVER ADAPTABLE FOR ENGAGEMENT ONE EACH WITH ONE OF SAID APERTURES IN SAID HOUSING LUGS WHEREBY PRESSURE WITHIN EACH SAID FILTERING SECTION LIFTS SAID COVER ASSOCIATED THEREWITH AND SAID PIN ENTERS SAID APERTURE THEREBY PREVENTING ROTATION OF SAID COVER, A TIMING DISK ATTACHED TO SAID SHAFT, AND FIRST AND SECOND PAWLS PIVOTALLY ATTACHED TO SAID HOUSING AND ENGAGEABLE WITH SAID TIMING DISK TO PREVENT ROTATION OF SAID SHAFT, SAID FIRST PAWL BEING ENGAGEABLE WITH SAID FIRST COVER FOR BIASING SAID PAWL OUT OF ENGAGEMENT WITH SAID TIMING DISK AND SAID SECOND PAWL BEING ENGAGEABLE WITH SAID SECOND COVER FOR BIASING SAID PAWL OUT OF ENGAGEMENT WITH SAID TIMING DISK WHEREBY SAID SHAFT CAN ONLY BE ROTATED TO CONNECT SAID INLET AND OUTLET VALVES TO A FILTERING SECTION THAT HAS A COVER THEREON.

Claim 3

Dependent Claim 65 words

A dual filtering device as set forth in claim 1 having a first vent valve in said first filtering section and a second vent valve in said second filtering section, said first and second vent valves being normally biased in a closed position, and a bar slidably attached to said flow control section and actuable by said timing disc to selectively open said vent valves.

Claim 4

Dependent Claim 45 words

A dual filtering device as set forth in claim 1 wherein said first and second valves are ball valves pivotally mounted in said flow control section whereby lubricating oil can be selectively flowed through said first and second filtering sections by rotation of said shaft.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-08-18	1979-02-17	1979-08-19	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-08-18	1983-02-17	1983-08-19	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-08-18	1987-02-17	1987-08-19	$7700.00	Window Closed / Lapsed

Dual filter for lubricating oil

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag