Patent US3777849A successfully refreshed from Google Patents.
US3777849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic transmission casing unit for an automobile vehicle
Assignee: Automobiles Peugeot SA
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Filing: 1971-07-06
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Granted: 1973-12-11
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Expires: 1991-07-06
Abstract
Abstract A casing defines a chamber which contains a gear change mechanism for a vehicle and communicates by way of at least one opening with a sump under the chamber. The opening has a wall portion which tapers in a direction opposed to the direction in which oil is driven by the change mechanism whereby the change mechanism drives the oil into the sump in the manner of a centrifugal pump.
Inventors
- 👤 J Piret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:58
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/042; F16H57/0421; B; B60; B60K; B60K5/00; B60K5/04; B60R; B60R17/00; F16H57/0457; F16H57/048; F16H57/0493
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
122 words
A gear change mechanism unit for a vehicle, said unit comprising a casing wall means defining a gear chamber in which a gear change mechanism is mounted for rotation about a central axis, said casing wall means having an opening therein, an oil sump means adjacent a lower part of said gear chambeR for receiving oil passing through said opening from the interior of said gear chamber to said sump, said gear chamber wall means being substantially concentric with said central axis adjacent said opening, said wall portion surrounding said opening having a leading edge, said leading edge portion defining a part of said opening and generally extending in a direction tangent to a circle having its center on said central axis.
Claim 2
Dependent Claim
122 words
A gear change mechanism unit for a vehicle, said unit comprising a casing wall means defining a gear chamber in which a gear change mechanism is mounted for rotation about a central axis, said casing wall means having an opening therein, an oil sump means adjacent a lower part of said gear chambeR for receiving oil passing through said opening from the interior of said gear chamber to said sump, said gear chamber wall means being substantially concentric with said central axis adjacent said opening, said wall portion surrounding said opening having a leading edge, said leading edge portion defining a part of said opening and generally extending in a direction tangent to a circle having its center on said central axis.
Claim 3
Dependent Claim
26 words
A unit as claimed in claim 1 comprising a plurality of said openings disposed respectively in regions of the rotating component parts of the change mechanism.
Claim 4
Dependent Claim
19 words
A unit as claimed in claim 1 wherein the opening is located in a lower part of the unit.
Claim 5
Dependent Claim
20 words
A unit as claimed in claim 1 wherein said part of said wall portion tapers toward said leading edge portion.
Claim 6
Dependent Claim
107 words
A gear change mechanism unit for a vehicle comprising wall means defining a gear chamber and supporting a shaft for rotation about a central axis, said shaft having at least one gear secured on said shaft for rotation about said axis, a portion of said wall means radially aligned with said gear having an opening therein, an oil sump adjacent said wall means for receiving and containing oil flowing through said opening, said opening having a portion extending substantially tangentially to said gear, whereby upon rotation of said gear about said central axis, oil is directed tangentially of said gear through said opening and into said sump.
Claim 7
Dependent Claim
107 words
A gear change mechanism unit for a vehicle comprising wall means defining a gear chamber and supporting a shaft for rotation about a central axis, said shaft having at least one gear secured on said shaft for rotation about said axis, a portion of said wall means radially aligned with said gear having an opening therein, an oil sump adjacent said wall means for receiving and containing oil flowing through said opening, said opening having a portion extending substantially tangentially to said gear, whereby upon rotation of said gear about said central axis, oil is directed tangentially of said gear through said opening and into said sump.
Claim 8
Dependent Claim
18 words
A unit as claimed in claim 5 wherein said wall means is substantially cylindrical about said central axis.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |