Patent US2499245A successfully refreshed from Google Patents.
Patent US3707212A successfully refreshed from Google Patents.
US3707212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for transmitting motion
Assignee: Individual
•
Filing: 1971-06-07
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Granted: 1972-12-26
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Expires: 1991-06-07
Abstract
Abstract In this device for transmitting motion to a large gear two driving pinions are in constant meshing engagement therewith and disposed at spaced intervals; these pinions are rotatably mounted on separate supports carrying a roller engaging a race formed concentrically on said gear, said supports being interconnected by a pair of coupling rods pivoted to a pair of retaining members each pivotally mounted about an axis parallel to the axis of the driven gear and interconnected in turn by a link of telescopic nature, with resilient means interconnecting in turn the sections of this link. One section of said interconnecting link is adapted to actuate a switch for opening the energizing circuit of the motor driving said pinions when the relative movements accomplished by these sections exceed a predetermined limit.
Inventors
- 👤 Francois Durand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:40
CPC Classifications
G; G05; G05G; G05G15/00; G05G15/08; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19628
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
227 words
Device for transmitting motion to a relatively large gear provided with peripheral teeth, which comprises in combination at least two driving pinions disposed at spaced intervals about said gear and in constant meshing engagement therewith, at least two supports independent of each other, each pinion being rotatably mounted in one of said supports, at least one race formed on said gear and concentric to its teeth, at least one roller mounted in each one of said supports and concentric to the relevant driving pinion, said roller being urged against said gear race, a coupling rod connecting each support to a retaining member adapted to hold each support against movement in the tangential direction, fixed pivot pins parallel to the gear axis and having each pivotally mounted thereon one of said retaining members, a connecting link having its ends pivoted to one and the other of said retaining members respectively and disposed substantially parallel to the plane containing the axis of said driven gear and the axes of said pair of driving pinions, a pair of tie-rods interconnecting said supports, which are disposed on either side of the plane containing the gear axis and the pinion axes, and on either side of the two main faces of said gear, and abutment means co-acting with at least one of said supports for limiting the amplitude of the movements thereof.
Claim 2
Dependent Claim
227 words
Device for transmitting motion to a relatively large gear provided with peripheral teeth, which comprises in combination at least two driving pinions disposed at spaced intervals about said gear and in constant meshing engagement therewith, at least two supports independent of each other, each pinion being rotatably mounted in one of said supports, at least one race formed on said gear and concentric to its teeth, at least one roller mounted in each one of said supports and concentric to the relevant driving pinion, said roller being urged against said gear race, a coupling rod connecting each support to a retaining member adapted to hold each support against movement in the tangential direction, fixed pivot pins parallel to the gear axis and having each pivotally mounted thereon one of said retaining members, a connecting link having its ends pivoted to one and the other of said retaining members respectively and disposed substantially parallel to the plane containing the axis of said driven gear and the axes of said pair of driving pinions, a pair of tie-rods interconnecting said supports, which are disposed on either side of the plane containing the gear axis and the pinion axes, and on either side of the two main faces of said gear, and abutment means co-acting with at least one of said supports for limiting the amplitude of the movements thereof.
Claim 3
Dependent Claim
85 words
A transmission device as set forth in claim 1, wherein the link interconnecting said pair of pivoting members is of telescopic nature and comprises consequently two sections adapted to slide in mutual alignment and connected by an elastic device, one of said sections carrying a member adapted to actuate a switch inserted in the circuit controlling the motor driving said pinions, the arrangement being such that a predetermined relative movement of said elements of said connecting link is attended by the opening of said switch.
Claim 4
Dependent Claim
48 words
A transmission device as set forth in claim 1, wherein the connecting link disposed between said pair of pivoting retaining members is disposed horizontally beneath said driven gear and said pair of driving pinions, a thrust member acting on one end of said connecting link being also provided.
References Cited (Backward Citations)
US2431428A
Cited
US3167975A
Cited
US3299729A
Cited
US3407911A
Cited
US3397591A
Cited
US3388608A
Cited
US3461735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |