US3669458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water pump seal
Assignee: Caterpillar Inc
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Filing: 1970-09-25
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Granted: 1972-06-13
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Expires: 1990-09-25
Abstract
Abstract A water pump seal including a lip-type sealing member restrained in a sealing position to a containing case and engaging the outer periphery of a cylindrical face seal member for the purpose of providing a pressure balance seal by eliminating the communication of water pressure to the rear face of the face seal member. The face seal member is held concentric with a shaft to be received by the seal and restrained from rotation by a spring secured to the face seal member at one end and to the case at its other end. Such manner of rotation restraint and the use of a lip-type sealing member further contribute to increased seal life.
Inventors
- 👤 Marion J Witzenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:22
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/36; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/12; F04D29/126
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
228 words
A rotary seal comprising a substantially cylindrical cupped case having a coaxial circular opening in a base end wall thereof for traversal by a rotary shaft, said case being adapted for mounting within a bore of a housing, a cylindrical tubular dynamic face seal member disposed coaxially of said case for traversal by said shaft and having an end rim face for sealably engaging a seal face of a hub carried by said shaft, a compression spring coaxial with said shaft and acting between said base end wall of said case and a second opposite end rim face of said face seal member for coaxially resiliently urging said first end rim face into sealed engagement with said seal face of said hub, means fixedly securing the opposite ends of said spring respectively to said second end rim face of said face seal member and to said base end wAll of said case, and a tubular substantially cylindrical lip-type static sealing member disposed coaxially outward of said face seal member having a first end sealably molded to the peripheral wall of said case and a second opposite end formed with an inwardly flared annular lip in slidable sealing engagement with the outer peripheral wall of said face seal member to thereby prevent pressure communication between the interior of said housing and the rear face of said face seal member.
Claim 2
Dependent Claim
228 words
A rotary seal comprising a substantially cylindrical cupped case having a coaxial circular opening in a base end wall thereof for traversal by a rotary shaft, said case being adapted for mounting within a bore of a housing, a cylindrical tubular dynamic face seal member disposed coaxially of said case for traversal by said shaft and having an end rim face for sealably engaging a seal face of a hub carried by said shaft, a compression spring coaxial with said shaft and acting between said base end wall of said case and a second opposite end rim face of said face seal member for coaxially resiliently urging said first end rim face into sealed engagement with said seal face of said hub, means fixedly securing the opposite ends of said spring respectively to said second end rim face of said face seal member and to said base end wAll of said case, and a tubular substantially cylindrical lip-type static sealing member disposed coaxially outward of said face seal member having a first end sealably molded to the peripheral wall of said case and a second opposite end formed with an inwardly flared annular lip in slidable sealing engagement with the outer peripheral wall of said face seal member to thereby prevent pressure communication between the interior of said housing and the rear face of said face seal member.
Claim 3
Dependent Claim
51 words
A rotary seal according to claim 1, further defined by the second end of said static sealing member having a circumferential groove in the outer surface thereof adjacent said lip, and garter spring means received by said groove to urge said lip into slidable sealing engagement with said face seal member.
Claim 4
Dependent Claim
259 words
A rotary seal comprising a substantially cylindrical cupped case having a coaxial circular opening in a base end wall thereof for traversal by a rotary shaft and a peripheral wall extending axially of said base end wall, the peripheral wall of said case having an outwardly flared annular flange at its end and an intermediate outwardly stepped radial shoulder, said case being adapted for mounting within a bore of a housing, a cylindrical tubular dynamic face seal member disposed coaxially of said case for traversal by said shaft and having an end rim face for sealingly engaging a seal face of a hub carried by said shaft, a compression spring acting between said base end wall of said case and a second opposite end rim face of said face seal member for coaxially resiliently urging said first end rim face into sealed engagement with said seal face of said hub, means for restraining said face seal member against rotation coaxially thereof, and a tubular substantially cylindrical lip-type static sealing member disposed coaxially outward of said face seal member and having a first end including an outwardly flared portion molded to said shoulder and over said flange and the adjacent end of the outer peripheral wall of said case, and a second opposite end of said static sealing member formed with an inwardly flared annular lip in slidable sealing engagement with the outer peripheral wall of said face seal member to thereby prevent pressure communication between the interior of said housing and the rear face of said face seal member.
Claim 5
Dependent Claim
259 words
A rotary seal comprising a substantially cylindrical cupped case having a coaxial circular opening in a base end wall thereof for traversal by a rotary shaft and a peripheral wall extending axially of said base end wall, the peripheral wall of said case having an outwardly flared annular flange at its end and an intermediate outwardly stepped radial shoulder, said case being adapted for mounting within a bore of a housing, a cylindrical tubular dynamic face seal member disposed coaxially of said case for traversal by said shaft and having an end rim face for sealingly engaging a seal face of a hub carried by said shaft, a compression spring acting between said base end wall of said case and a second opposite end rim face of said face seal member for coaxially resiliently urging said first end rim face into sealed engagement with said seal face of said hub, means for restraining said face seal member against rotation coaxially thereof, and a tubular substantially cylindrical lip-type static sealing member disposed coaxially outward of said face seal member and having a first end including an outwardly flared portion molded to said shoulder and over said flange and the adjacent end of the outer peripheral wall of said case, and a second opposite end of said static sealing member formed with an inwardly flared annular lip in slidable sealing engagement with the outer peripheral wall of said face seal member to thereby prevent pressure communication between the interior of said housing and the rear face of said face seal member.
Claim 6
Dependent Claim
51 words
A rotary seal according to claim 3, further defined by the means for restraining said face seal member against rotation comprising means fixedly securing the opposite ends of said spring respectively to said second end rim face of said face seal member and to said base end wall of said case.
Claim 7
Dependent Claim
51 words
A rotary seal according to claim 4, further defined by the second end of said static sealing member having a circumferential groove in the outer surface thereof adjacent said lip, and garter spring means received by said groove to urge said lip into slidable sealing engagement with said face seal member.
Claim 8
Dependent Claim
282 words
A rotary seal comprising a substantially cylindrical cupped case having a coaxial circular opening in a base end wall thereof for traversal by a rotary shaft, said case being adapted for mounting within a bore of a housing by a peripheral wall extending from said base end wall thereof, the peripheral wall of said case having an outwardly flared annular flange at its end and an intermediate outwardly stepped radial shoulder, a cylindrical tubular dynamic face seal member disposed coaxially of said case for traversal by said shaft and having an end rim face for sealingly engaging a seal face of a hub carried by said shaft, a compression spring acting between said base end wall of said case and a second opposite end rim face of said face seal member for coaxially resiliently urging said first end rim face into sealed engagement with said seal face of said hub, means for restraining said face seal member against rotation coaxially thereof, and a tubular substantially cylindrical lip-type static sealing member disposed coaxially outward of said seal face member including a first end having an outwardly flared portion molded to said shoulder and over said flange and the adjacent end of the outer peripheral wall of said case, and a second opposite end on said static sealing member formed with an inwardly flared annular lip having a circumferential groove in the outer surface thereof adjacent said lip, and garter spring means received by said groove to urge said lip into slidable sealing engagement with the outer peripheral wall of said face seal member to thereby prevent pressure communication between the interior of said housing and the rear face of said face seal member.
Claim 9
Dependent Claim
282 words
A rotary seal comprising a substantially cylindrical cupped case having a coaxial circular opening in a base end wall thereof for traversal by a rotary shaft, said case being adapted for mounting within a bore of a housing by a peripheral wall extending from said base end wall thereof, the peripheral wall of said case having an outwardly flared annular flange at its end and an intermediate outwardly stepped radial shoulder, a cylindrical tubular dynamic face seal member disposed coaxially of said case for traversal by said shaft and having an end rim face for sealingly engaging a seal face of a hub carried by said shaft, a compression spring acting between said base end wall of said case and a second opposite end rim face of said face seal member for coaxially resiliently urging said first end rim face into sealed engagement with said seal face of said hub, means for restraining said face seal member against rotation coaxially thereof, and a tubular substantially cylindrical lip-type static sealing member disposed coaxially outward of said seal face member including a first end having an outwardly flared portion molded to said shoulder and over said flange and the adjacent end of the outer peripheral wall of said case, and a second opposite end on said static sealing member formed with an inwardly flared annular lip having a circumferential groove in the outer surface thereof adjacent said lip, and garter spring means received by said groove to urge said lip into slidable sealing engagement with the outer peripheral wall of said face seal member to thereby prevent pressure communication between the interior of said housing and the rear face of said face seal member.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |