US3638424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for driving a hub in continuous unidirectional rotation by means of rectilinear toothed racks
Assignee: Charbonnages de France CDF
•
Filing: 1970-12-01
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Granted: 1972-02-01
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Expires: 1990-12-01
Abstract
Abstract A device for driving a hub in continuous rotation in one single direction by means of two rectilinear actuating racks which have alternating rectilinear movements simultaneously in opposite directions and of two alternately rotating driving members coupled to the hub when they rotate in a given direction. Each driving member is provided with a curved tooth rack continuously engaging with one of the rectilinear actuating racks s while two rectilinear synchronizing racks are each rigidly fixed for translation to one of the actuating racks and are simultaneously and continuously engaged with a toothed synchronizing pinion having an axis of rotation fixed with respect to the said rectilinear racks.
Inventors
- 👤 Alfred Valantin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:06
CPC Classifications
F; F16; F16H; F16H31/00; F16H31/001; F15; F15B; F15B15/00; F15B15/02; F15B15/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
211 words
A device for driving a hub in rotation, comprising: two rotating driving members mounted freely rotatable on said hub and each comprising a toothed circular segment, of which the generator line of the teeth is parallel to the axis of the hub; means for selectively coupling said driving members to said hub for a given direction of rotation; two driving assemblies each consisting of a hydraulic double acting jack with a double piston rod arranged at right angles to said hub and fixed with respect to this latter and with a body movable along said rod; a rectilinear toothed aCtuating rack rigidly fixed for translation with said jack body and continuously engaged with the circular toothed segment of one of said driving members; a rectilinear synchronization rack rigidly fixed for translation to said jack body and in which the generator line of the teeth is at right angles to the axis of said hub; and a synchronizing pinion continuously engaged with both the two synchronizing racks, the axis of said pinion being at right angles to the axis of the hub and fixed with respect to said hub; and a hydraulic supply circuit for the two jacks, applying alternating rectilinear movements of simultaneously opposite directions to the bodies of said jacks.
Claim 2
Independent Claim
211 words
A device for driving a hub in rotation, comprising: two rotating driving members mounted freely rotatable on said hub and each comprising a toothed circular segment, of which the generator line of the teeth is parallel to the axis of the hub; means for selectively coupling said driving members to said hub for a given direction of rotation; two driving assemblies each consisting of a hydraulic double acting jack with a double piston rod arranged at right angles to said hub and fixed with respect to this latter and with a body movable along said rod; a rectilinear toothed aCtuating rack rigidly fixed for translation with said jack body and continuously engaged with the circular toothed segment of one of said driving members; a rectilinear synchronization rack rigidly fixed for translation to said jack body and in which the generator line of the teeth is at right angles to the axis of said hub; and a synchronizing pinion continuously engaged with both the two synchronizing racks, the axis of said pinion being at right angles to the axis of the hub and fixed with respect to said hub; and a hydraulic supply circuit for the two jacks, applying alternating rectilinear movements of simultaneously opposite directions to the bodies of said jacks.
Claim 3
Dependent Claim
89 words
A device for driving a hub in rotation as claimed in claim 1, in which the hydraulic circuit of said hydraulic jacks comprises a high-pressure pump, a hydraulic accumulator coupled to the outlet of said pump, a four two-position valve of which each utilization channel is continuously connected to one of the extremities of a jack and simultaneously to the geographically opposite extremity of the other jack, said valve being piloted by end-of-travel devices each arranged at one of the extremities of the body of one of said jacks.
Claim 4
Dependent Claim
111 words
A device for driving a hub in rotation as claimed in claim 1, in which the hydraulic circuit of said hydraulic jacks comprises a high-pressure pump, a hydraulic accumulator coupled to the outlet of said pump, a first valve with four ways and two positions, in which each utilization channel is continuously connected to one of the extremities of one of said jacks and simultaneously to the geographically opposite extremity of the other jack, a second accelerator valve with four ways and two positions with hydraulic amplification adapted to pilot said first valve, said second valve being piloted by end-of-travel devices arranged at the geographically identical extremities of each said jack.
Claim 5
Dependent Claim
71 words
A device for driving a hub in rotation as claimed in claim 2, in which the means for selectively coupling said driving members to the hub in one given direction of rotation are constituted, for each driving member, by a free wheel of which the external cage is rigidly fixed for rotation with the corresponding driving member, and in which the normal cage is rigidly fixed for rotation with said hub.
Claim 6
Dependent Claim
68 words
A device for driving a hub in rotation as claimed in claim 3, in which said means for selectively coupling the driving members to the hub in one given direction of rotation are constituted, for each driving member, by a freewheel, the external cage of which is fast for rotation with the corresponding driving member, and in which the internal cage is fast for rotation with said hub.
Claim 7
Dependent Claim
135 words
A device for driving a hub in rotation as claimed in claim 2, in which the means for selectively coupling the driving members with the hub in one direction of rotation are constituted, for each driving member, by two cylindrical coaxial sleeves one inside the other surrounding the hub, welded to each other by two welding beads, each coupling the two extreme edges of the two sleeves located facing each other, a cylindrical groove being formed in the internal sleeve and having a depth such that the wall left on the hub side is thin, the outer sleeve being traversed by a conduit putting the interior of the groove into communication with a hydraulic circuit applying a hydraulic pressure when the driving member is rotating in a given direction identical for the two driving members.
Claim 8
Dependent Claim
140 words
A device for driving a hub in rotation as claimed in claim 3, in which the means for selectively coupling the driving members to the hub in one given direction of rotation are constituted, for each driving member, by two coaxial cylindrical sleeves, one inside the other and surrounding the hub, welded to each other by two welding beads each coupling together the two extreme edges of the two sleeves located facing each other, a cylindrical groove being formed in the inner sleeve and having a depth such that the wall let on the hub sIde is thin, the outer sleeve being traversed by a conduit putting the interior of the groove into communication with a hydraulic circuit applying a hydraulic pressure when the driving member is rotating in a given direction which is identical for the two driving members.
References Cited (Backward Citations)
US3104589A
Cited
US3142962A
Cited
US3246581A
Cited
US3436913A
Cited
US3537358A
Cited
US3530668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |