US5080053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary drives
Assignee: Jaguar Land Rover Ltd
•
Filing: 1990-11-06
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Granted: 1992-01-14
•
Expires: 2010-11-06
Abstract
Abstract A drive mechanism includes an internal gear rotatably mounted on an eccentric, the eccentric being mounted on a drive shaft for rotation therewith, said internal gear having an arm with an elongate slot, a block being pivotally mounted on a pin slidably located in the slot, an external gear being rotatably mounted coaxially of the internal gear and in mesh therewith, the position of the pin being adjustable relative to the axis of the drive shaft.
Inventors
- 👤 Bryan N. V. Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:48
CPC Classifications
F; F16; F16H; F16H21/00; F16H21/10; F16H21/16; F16H21/18; F16H21/22; F16H21/30; F01; F01L; F01L1/00; F01L1/02; F01L1/34; F01L1/344; F01L1/356; F16H35/00; F16H35/02; F01L1/026; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/1956; Y10T74/21; Y10T74/2101; Y10T74/2102
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
A drive mechanism comprising an internal gear and an external gear, one of said gears being rotatably mounted on an eccentric, the eccentric being mounted on a drive shaft for rotation therewith, said one gear having a formation which engages a complimentary formation, the formation on the gear being capable of linear and pivotal movement relative to the said complimentary formation, said other gear being rotatably mounted coaxially of the drive shaft in meshing engagement with said one gear, the position of the complimentary formation being adjustable relative to the axis of the drive shaft.
Claim 2
Dependent Claim
95 words
A drive mechanism comprising an internal gear and an external gear, one of said gears being rotatably mounted on an eccentric, the eccentric being mounted on a drive shaft for rotation therewith, said one gear having a formation which engages a complimentary formation, the formation on the gear being capable of linear and pivotal movement relative to the said complimentary formation, said other gear being rotatably mounted coaxially of the drive shaft in meshing engagement with said one gear, the position of the complimentary formation being adjustable relative to the axis of the drive shaft.
Claim 3
Dependent Claim
35 words
A drive mechanism according to claim 1 in which the internal gear is mounted on the eccentric with a bearing therebetween, the external gear being mounted concentrically of the drive shaft in suitable bearing means.
Claim 4
Dependent Claim
19 words
A drive mechanism according to claim 2 in which the bearing means is located externally of the external gear.
Claim 5
Dependent Claim
24 words
A drive mechanism according to claim 2 in which the ratio of the diameters of the internal and external gears is 3 to 2.
Claim 6
Dependent Claim
35 words
A drive mechanism according to claim 1 in which the external gear is mounted on the eccentric with a bearing therebetween, the internal gear being mounted concentrically of the drive shaft in suitable bearing means.
Claim 7
Dependent Claim
24 words
A drive mechanism according to claim 5 in which the ratio of the diameters of the internal and external gear is 2 to 1.
Claim 8
Dependent Claim
45 words
A drive mechanism according to claim 1 in which the formation on said one gear comprises a radially extending arm with a radial slot therein, the complimentary formation comprising a block which slidably locates in the slot, said block being pivotally mounted about a pin.
Claim 9
Dependent Claim
41 words
A cam mechanism comprising a drive mechanism as claimed in claim 1, a cam being drivably interconnected with said other gear, the ratio of the diameters of the internal and external gear giving a reduction in drive of 2 to 1.
Claim 10
Dependent Claim
66 words
A valve mechanism for an internal combustion engine comprising a plurality of cam mechanisms as claimed in claim 8, the cam mechanisms being provided on a common drive shaft, the orientation of the eccentrics being varied to provide the appropriate phase relationship for controlling the valves of the engine, means being provided to move the complimentary formations in order to vary the timing of the valve.
Claim 11
Dependent Claim
25 words
A valve mechanism according to claim 9 in which the complimentary formations associated with two or more cam mechanisms are arranged to be adjusted together.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-13 | 1995-07-15 | 1996-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-13 | 1999-07-15 | 2000-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-13 | 2003-07-15 | 2004-01-14 | $7700.00 | Window Closed / Lapsed |