US3945221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft coupling with variable timing
Assignee: Renault SA
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Filing: 1975-01-16
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Granted: 1976-03-23
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Expires: 1995-01-16
Abstract
Abstract The invention relates to a coupling device comprising a sliding member sliding mounted on one driving shaft but adapted to slide axially thereon for varying the angular timing of another driven shaft in relation to said one driving shaft, notably in the case of a valve gear timing system of internal combustion engine. A bevel gear is rotatably mounted integral with said other shaft, at the adjacent end of said one shaft, a pair of bevel-toothed segments meshing with diametrally opposed sectors of said bevel gear and pivotally mounted to a diametral pin carried by said other shaft, each bevel toothed segment being rotatably solid with a lever formed with a fork-shaped cavity for receiving a driving pin carried by said sliding member, the cavities provided for said pair of segments being opposed to each other and formed on either side of said other shaft, whereby the translation of said sliding member is attended by opposite angular movements of said bevel-toothed segments.
Inventors
- 👤 Stevan Miokovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:04
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/02; F16D3/10; F01; F01L; F01L1/00; F01L1/34; F01L1/344; F01L1/352
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
175 words
Device for coupling together two coaxial rotary shafts and permitting of varying within certain limits the relative angular timing of said shafts under running conditions, notably for driving the valves of internal combustion engines, which comprises a sliding member adapted to move axially in relation to said shafts for varying their relative angular timing, said device further comprising a bevel gear rotatably integral with one shaft, at one end thereof, a pair of toothed segments having bevel teeth in constant meshing engagement with diametrally opposed portions of said bevel gear, said segments being pivoted by means of a diametral pin carried by the other shaft, each bevel-toothed segments being rotatably solid with a lever having a fork-shaped cavity engageable by a driving pin carried by said sliding member, the cavities of said levers being diametrally opposed and disposed on either side of said other shaft, whereby any movement of translation impressed to said sliding member is attended by opposite angular movements of said bevel toothed segments, thus varying the relative angular timing of said shafts.
Claim 2
Dependent Claim
175 words
Device for coupling together two coaxial rotary shafts and permitting of varying within certain limits the relative angular timing of said shafts under running conditions, notably for driving the valves of internal combustion engines, which comprises a sliding member adapted to move axially in relation to said shafts for varying their relative angular timing, said device further comprising a bevel gear rotatably integral with one shaft, at one end thereof, a pair of toothed segments having bevel teeth in constant meshing engagement with diametrally opposed portions of said bevel gear, said segments being pivoted by means of a diametral pin carried by the other shaft, each bevel-toothed segments being rotatably solid with a lever having a fork-shaped cavity engageable by a driving pin carried by said sliding member, the cavities of said levers being diametrally opposed and disposed on either side of said other shaft, whereby any movement of translation impressed to said sliding member is attended by opposite angular movements of said bevel toothed segments, thus varying the relative angular timing of said shafts.
Claim 3
Dependent Claim
25 words
Device according to claim 1, wherein said sliding member is mounted through splines on said one shaft carrying said bevel toothed segments, adjacent said segments.
Claim 4
Dependent Claim
52 words
Device according to claim 1, wherein each bevel toothed segment comprises a shank portion opposite the segment teeth and fitted in a cavity formed on the corresponding lever, said shank receiving said diametral pin therethrough, said fork-shaped driving-pin receiving cavity being adjacent and perpendicular to the cavity receiving the corresponding segment shank.
Claim 5
Dependent Claim
43 words
Device according to claim 1, wherein said bevel toothed gear is centered to the end portion of the shaft carrying the bevel toothed segments and comprises key means affording a relative angular clearance as a function of the desired maximum angular timing variation.
Claim 6
Dependent Claim
28 words
Device according to claim 1, wherein said bevel gear is provided with an integral tenon engaging a diametral slot formed in the adjacent end of the driven shaft.
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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |