US3834520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed drive system
Assignee: Individual
•
Filing: 1973-06-05
•
Granted: 1974-09-10
•
Expires: 1993-06-05
Abstract
Abstract A variable speed drive for moveable elements guided along a trajectory has couplings connecting the elements in pairs. The couplings are formed of deformable polygonal loops having the same constant perimeter. The loops are mounted in tension between at least three linking points are carried respectively by two successive moveable elements and at least one linking point follows a cam arranged along the trajectory. The profile of the cam is such that the moveable element move toward and away from each other in the regions of deceleration and acceleration. Some of the linking points are formed by pivotable and/or slidable members to allow free formation of the polygonal loops.
Inventors
- 👤 P Patin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:34
CPC Classifications
B; B66; B66B; B66B21/00; B66B21/10; B66B21/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
115 words
A system for the variable speed drive of movable elements guided along a trajectory comprising couplings connecting the elements in pairs, deformable polygonal loops forming said couplings having the same constant perimeter, the said loops being mounted in tension between at least three linking points of which at least two are carried respectively by two successive movable elements and at least one follows a cam arranged substantially along said trajectory said cam having a profile such that said movable elements move towards and away from each other respectively in the regions of deceleration and acceleration, at least some of said linking points being pivotable or slidable members for free deformation of the said polygonal loops.
Claim 2
Independent Claim
115 words
A system for the variable speed drive of movable elements guided along a trajectory comprising couplings connecting the elements in pairs, deformable polygonal loops forming said couplings having the same constant perimeter, the said loops being mounted in tension between at least three linking points of which at least two are carried respectively by two successive movable elements and at least one follows a cam arranged substantially along said trajectory said cam having a profile such that said movable elements move towards and away from each other respectively in the regions of deceleration and acceleration, at least some of said linking points being pivotable or slidable members for free deformation of the said polygonal loops.
Claim 3
Dependent Claim
16 words
A drive system as claimed in claim 1 wherein the said polygonal loops are substantially triangular.
Claim 4
Dependent Claim
82 words
A drive system as claimed in claim 2 wherein the said deformable loops are mounted in tension between two linking points formed by free-running pulleys, and each of said pulleys being fixed to one of said movable elements, and at least a third linking point formed by another free-running pulley, a tension carriage running on a rail carrying said other pulley, said rail being a cam causing separation or approach of the carriage and approach or separation of two successive movable elements.
Claim 5
Dependent Claim
18 words
A drive system as claimed in claim 3 wherein the said deformable loops are arranged vertically or horizontally.
Claim 6
Dependent Claim
26 words
A drive system as claimed in claim 3 comprising two similar assemblies arranged symmetrically with respect to a longitudinal meDian plane and parallel to each other.
Claim 7
Dependent Claim
47 words
A drive system as claimed in claim 5 wherein the couplings are vertical and four free-running pulleys of a movable element are mounted in pairs on a shaft and a control device for linear displacement at a constant speed of the movable elements acting on said shaft.
Claim 8
Dependent Claim
61 words
A drive system as claimed in claim 1 including means for providing linear displacement of said movable elements in a region of constant speed having an endless chain or belt driven by a motor and a series of external stop-blocks mounted on said chain or belt mutually separated by the distance between two movable elements in the region of constant speed.
Claim 9
Dependent Claim
42 words
A drive system as claimed in claim 1 including a control device for the linear displacement of said movable elements in a region of constant speed having a linear induction motor and induction elements for said motor fixed to said movable elements.
Claim 10
Dependent Claim
15 words
A drive system as claimed in claim 1 wherein the polygonal loops are substantially quadrilateral.
Claim 11
Dependent Claim
112 words
A drive system as claimed in claim 9 wherein the deformable loops are mounted in tension between four linking points formed by four free-running pulleys, a pair of the free-running pulleys sliding along a guide fixed to a movable element and the other pair sliding along a guide fixed to the following movable element, the said guides being arranged transversely with respect to the direction of displacement to the said elements, a first pulley of each pair being constrained to follow a first cam and the second pulley of each pair a second cam, the separation between the cams increasing in the regions of deceleration and decreasing in the regions of acceleration.
Claim 12
Dependent Claim
16 words
A drive system as claimed in claim 10 wherein the said deformable loops are arranged horizontally.
Claim 13
Dependent Claim
27 words
A drive system as claimed in claim 1 at least one of said movable elements supporting cross-pieces and means on said cross-pieces for carrying passengers or goods.
Claim 14
Dependent Claim
20 words
A drive system as claimed in claim 1 said movable elements include side rails for transporters having a variable speed.
Claim 15
Dependent Claim
48 words
A transporter for goods including a drive system having variable speed as claimed in claim 1 comprising a plurality of similar assemblies arranged vertically and parallel to each other, said free-running pulleys of this plurality of assemblies being mounted, for each movable element, on the same transverse shaft.
Claim 16
Dependent Claim
23 words
A personal transporter having a variable speed including a drive system as claimed in claim 1, each movable element including a sliding plate.
Claim 17
Dependent Claim
60 words
A transporter with containers including a variable speed drive system as claimed in claim 1, including secondary movable elements, at least one secondary movable element being positioned between two principal movable elements formed by the support elements for said containers, the deformable loops of constant perimeter acting between two successive secondary elements or a secondary element and a principal element.
Claim 18
Dependent Claim
37 words
A transporter for suspended containers as claimed in claim 16 wherein the variable speed drive system is arranged above the guiding device of the, containers and the guiding device for the movable elements of the drive system.
Claim 19
Dependent Claim
27 words
A side rail including a variable speed drive system as claimed in claim 1 comprising a vertically arranged assembly, the movable elements providing support for the user.
Claim 20
Dependent Claim
58 words
A side rail including a variable speed drive system as claimed in claim 1 comprising a plurality of similar assemblies arranged vertically and parallel to each other, the free-running pulleys of said plurality of assemblies being mounted, for each movable element, on at least one common shaft, and bridges overlapping said movable elements and fixed on said shafts.
References Cited (Backward Citations)
US3565238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |