Patent US3729215A successfully refreshed from Google Patents.
US3729215A
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Coupling device for a dray
Assignee: Stora Enso Oyj
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Filing: 1971-11-18
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Granted: 1973-04-24
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Expires: 1991-11-18
Abstract
Abstract In a coupling device for a dray, a device with which one end of the dray can be lifted to rest against the pulling vehicle and which consists of a coupling part of a gooseneck attached to a pulling vehicle at one end and a coupling pocket in the dray meant to receive the gooseneck. The side walls of the gooseneck coupling part and the coupling pocket deviate from the vertical plane and are dimensioned so that, when lifted the slanted side walls of the coupling part of the gooseneck are wedged between the slanted side walls of the coupling pocket so that a pulling coupling is created between the dray and the pulling vehicle.
Inventors
- 👤 I Paakkinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:49
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/06; B62D53/061; B62D53/062; B62D53/065
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
129 words
In a coupling device for a dray a first coupling means at one end of a gooseneck which gooseneck is attached to a pulling vehicle at one end thereof and a second coupling means attached to one end of the dray, in which one of the first and second coupling means is a projection and the other a coupling pocket adapted to receive the projection for supporting said one end of the dray and in which the first and second coupling means have slanting side walls deviating from the vertical plane and dimensioned so that, when lifted, the slanted side walls of the projection are wedged between the slanted side walls of the coupling pocket in order to create a pulling coupling between the dray and the pulling vehicle.
Claim 2
Dependent Claim
129 words
In a coupling device for a dray a first coupling means at one end of a gooseneck which gooseneck is attached to a pulling vehicle at one end thereof and a second coupling means attached to one end of the dray, in which one of the first and second coupling means is a projection and the other a coupling pocket adapted to receive the projection for supporting said one end of the dray and in which the first and second coupling means have slanting side walls deviating from the vertical plane and dimensioned so that, when lifted, the slanted side walls of the projection are wedged between the slanted side walls of the coupling pocket in order to create a pulling coupling between the dray and the pulling vehicle.
Claim 3
Dependent Claim
33 words
The coupling device of claim 1, wherein the side walls of the projection and the coupling pocket converge upward at the end closest to the pulling vehicle and downward at the other end.
Claim 4
Dependent Claim
19 words
The coupling device of claim 1, wherein the side walls of the projection and the coupling pocket converge upward.
Claim 5
Dependent Claim
36 words
The coupling device of claim 1, wherein the first coupling means at one end of the gooseneck is the projection and the second coupling means at the one end of the dray is the coupling pocket.
Claim 6
Dependent Claim
31 words
The coupling device of claim 1, wherein the slanted side walls of the projection and the coupling pocket respectively form an angle of from 10* to 45* with the vertical plane.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |