Patent US4337923A successfully refreshed from Google Patents.
Patent US3788166A successfully refreshed from Google Patents.
US3788166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed responsive locking differential
Assignee: Caterpillar Inc
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Filing: 1972-04-28
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Granted: 1974-01-29
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Expires: 1992-04-28
Abstract
Abstract A locking differential assembly for vehicles including a hydraulically operated disc clutch for locking the differential assembly and a control system for the clutch associated with a transmission having speed range selection means, the control system normally permitting differential operation in high operating speed ranges of the transmission while actuating the clutch to normally prevent differential operation in low operating speed ranges, the control system also including a manually operable override control to selectively establish differential operation in low speed range settings of the transmission.
Inventors
- 👤 P Rosenberger
- 👤 C Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:22
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/20; F16H48/22; B; B60; B60K; B60K23/00; B60K23/04; F16H48/06; F16H48/08; F16H48/30; F16H48/34; F16H2048/204; F16H2048/305; F16H2200/00; F16H2200/20; F16H2200/203; F16H2200/2071; F16H48/32; F16H48/38; F16H48/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A drive mechanism for a vehicle comprising a differential hving a driving input gear, a driven ring gear, wheel driving shafts, gears secured to said shafts and driven from the ring gear, a disc clutch disposed between the ring gear and one of said shafts, a change speed transmission having separate low speed and high speed clutches, a source of fluid under pressure, means controlling said transmission and selectively communicating said fluid with said clutches and said disc clutch, valve means disposed between said transmission controlling means and said disc clutch automatically responsive to the actuation of said low clutch means only to communicate fluid to said disc clutch to actuate the same to prevent differential action, a manual override means connected to the valve means being operable to condition the valve means for blocking communication between said low clutch means, the source of fluid and the disc clutch.
Claim 2
Dependent Claim
149 words
A drive mechanism for a vehicle comprising a differential hving a driving input gear, a driven ring gear, wheel driving shafts, gears secured to said shafts and driven from the ring gear, a disc clutch disposed between the ring gear and one of said shafts, a change speed transmission having separate low speed and high speed clutches, a source of fluid under pressure, means controlling said transmission and selectively communicating said fluid with said clutches and said disc clutch, valve means disposed between said transmission controlling means and said disc clutch automatically responsive to the actuation of said low clutch means only to communicate fluid to said disc clutch to actuate the same to prevent differential action, a manual override means connected to the valve means being operable to condition the valve means for blocking communication between said low clutch means, the source of fluid and the disc clutch.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |