Patent US3922970A successfully refreshed from Google Patents.
US3922970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway transportation system
Assignee: MIJ VOOR IND RESEARCH EN ONTWI
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Filing: 1972-04-14
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Granted: 1975-12-02
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Expires: 1992-04-14
Abstract
Abstract A transportation apparatus comprises a track formed of two cylindrical elongated elements, the facing inner surfaces of the elements constituting guide paths for traveling wheels of a carriage, the wheels lying within the area between the two track elements. Switch junctions for the track are formed with two or more switch pieces set on a rotatable member for selective location between an inlet of the junction and one or the other of the outlets thereof. The carriage has a motor-driven driving wheel which frictionally contacts one of the track elements, and apertures formed in the outer circumference of the driving wheel are capable of cooperating with pins formed on the track element surface particularly at bends of the track so as to ensure a positive drive.
Inventors
- 👤 Hendrik Glastra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:19
CPC Classifications
B; B61; B61C; B61C13/00; B61C13/04; B61L; B61L23/00; B61L23/002; B61L23/005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A transportation apparatus comprising at least one pair of spaced apart, cylindrical, elongated elements defining at least one track, clips interconnecting said elements together in spaced-apart relationship, a carriage guided on said elements and being located therebetween, travelling pulley-type wheels on said carriage also lying between said elements and being in rolling contact with the opposing and inwardly facing portions of said elements, a driving wheel resiliently supported on said carriage and lying in the plane of said travelling wheels, said driving wheel having spaced friction means thereon in rolling contact with one of said elements, and a motor operatively connected to said carriage through reduction gearing for driving said drive wheel.
Claim 2
Dependent Claim
112 words
A transportation apparatus comprising at least one pair of spaced apart, cylindrical, elongated elements defining at least one track, clips interconnecting said elements together in spaced-apart relationship, a carriage guided on said elements and being located therebetween, travelling pulley-type wheels on said carriage also lying between said elements and being in rolling contact with the opposing and inwardly facing portions of said elements, a driving wheel resiliently supported on said carriage and lying in the plane of said travelling wheels, said driving wheel having spaced friction means thereon in rolling contact with one of said elements, and a motor operatively connected to said carriage through reduction gearing for driving said drive wheel.
Claim 3
Dependent Claim
74 words
The apparatus according to claim 1 wherein said one of said elements in provided with a row of spaced pins extending toward the other of said elements, said driving wheel being provided with a plurality of spaced receiving apertures in the outer periphery thereof for cooperation with said spaced pins as said carriage is driven along said track, and at least one of said travelling wheels having an annular groove along its outer periphery.
Claim 4
Dependent Claim
43 words
The apparatus according to claim 2 wherein the free ends of said pins are each of a four-sided frusto-pyramidal shape, and the length of said pins in the row gradually increase and decrease respectively near the beginning and the end of the row.
Claim 5
Dependent Claim
68 words
The apparatus according to claim 1 wherein two spacer pair of said travelling wheels are provided, said driving wheel, reduction gearing and motor constituting a single unit and being located between said spaced pair of wheels and said unit being supported for movement in a direction of the axis of rotation of said driving wheel and for movement in a direction of the longitudinal axis of said carriage.
Claim 6
Dependent Claim
141 words
The apparatus according to claim 4 wherein said unit is mounted on a transversely extending fastening plate, transversely extending guide pieces secured to said carriage, elongated guiDe slots in said guide pieces, guide pins on said fastening plate extending through said guide slots for guiding said fastening plate relative thereto, a second fastening plate having bent-over edges, elongated openings in said second plate, guide pins on said carriage extending through said second plate openings, said second plate being guided by said carriage pins and being slideable in a transverse direction to the longitudinal axis of said carriage, a carrier for a presser wheel being located on said second plate, said presser wheel being in rolling contact with said other of said elements, and spring means for resiliently guiding said carriage in a transverse direction to the longitudinal axis of said carriage.
Claim 7
Dependent Claim
121 words
The apparatus according to claim 1 wherein another pair of said elements are provided defining another track intersecting said one track and lying in the same plane, a junction switch track means located at the intersection of and interrupting said two tracks, said switch track means including a support plate having at least two sides and being mounted for rotation about its longitudinal axis, track sections respectively mounted on said two sides, one of said track sections forming a portion of said one track and the other of said track sections forming a portion of said another track upon rotation of said support plate, whereby each of said tracks are alternately interrupted and made continuous upon rotation of said support plate.
Claim 8
Dependent Claim
27 words
The apparatus according to claim 6 wherein said switch means further includes means for locking said support plate upon rotation thereof in alternate positions of rotation thereof.
Claim 9
Dependent Claim
79 words
The apparatus according to claim 6 wherein still another pair of said elements are provided defining still another track intersecting said one track and lying in the same plane therewith, said support plate having three sides, with track sections mounted on each side thereof, respective ones of said track sections forming a portion of said tracks upon rotation of said support plate, whereby each of said tracks are alternately interrupted and made continuous upon rotation of said support plate.
References Cited (Backward Citations)
US2913997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |