Patent US4457108A successfully refreshed from Google Patents.
US4457108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door
Assignee: IFE GmbH
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Filing: 1981-06-08
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Granted: 1984-07-03
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Expires: 2001-06-08
Abstract
Abstract A door includes an elongated bearing rail and at least one door section which is operatively connected to the rail for sliding movement in a direction along the elongation of the rail. The door section is so mounted relative to the rail as to perform transversal movement about an axis extending substantially in parallel to said rail. During the transversal movement of the door section frictional rotation between the bearing rail and the connecting means is precluded.
Inventors
- 👤 Konrad Kuschel
- 👤 Alfred Wiehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:20
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/06; E05D15/10; E05D15/1065; E05D15/1068; B; B60; B60J; B60J5/00; B60J5/04; B60J5/06; B60J5/062; B61; B61D; B61D19/00; B61D19/003; B61D19/009; E05D15/1042; E05D15/1044; E05F; E05F15/00; E05F15/50; E05F15/56; E05F15/565; E05D2015/1028; E05D2015/1031; E05D2015/1036; E05D2015/1055; E05D2015/1071; E05F15/60; E05F15/603; E05F15/632; E05F15/643; E05F15/646; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/51
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
265 words
A slidable door, particularly for use in vehicles having a side wall, comprising at least one door section adapted to be flush with the vehicle side wall when the door section is in its closed position; a bearing rail supported in the vehicle, said door section being arranged to slide along said bearing rail in a direction parallel to the vehicle side wall; an attachment plate connected to said door section; a plurality of pairs of guide rollers engaging said bearing rail and connected to the attachment plate and operative for permitting a longitudinal sliding of the attachment plate along the bearing rail, but preventing a relative rotating movement between the attachment plate and the bearing rail; said pairs of guide rollers being spaced from one another and having respective axles rigidly connected to said attachment plate in order to provide the slidable movement of said plate along said bearing rail; said door section comprising a pin rigidly connected thereto and extending parallel to said bearing rail and hingedly connected to the attachment plate, said bearing rail having a cross-section deviating from a circular shape; and guide means comprising slide rollers connected rigidly to said door section and guide rails engaged with said slide rollers and supported in the vehicle, said guide rails having angled sections, said slide rollers being adapted to move along said guide rails, said bearing rail being adapted to pivot so as to permit said door section to move in a direction perpendicular to the vehicle side wall when said slide rollers move along the angled sections of said guide rails.
Claim 2
Dependent Claim
265 words
A slidable door, particularly for use in vehicles having a side wall, comprising at least one door section adapted to be flush with the vehicle side wall when the door section is in its closed position; a bearing rail supported in the vehicle, said door section being arranged to slide along said bearing rail in a direction parallel to the vehicle side wall; an attachment plate connected to said door section; a plurality of pairs of guide rollers engaging said bearing rail and connected to the attachment plate and operative for permitting a longitudinal sliding of the attachment plate along the bearing rail, but preventing a relative rotating movement between the attachment plate and the bearing rail; said pairs of guide rollers being spaced from one another and having respective axles rigidly connected to said attachment plate in order to provide the slidable movement of said plate along said bearing rail; said door section comprising a pin rigidly connected thereto and extending parallel to said bearing rail and hingedly connected to the attachment plate, said bearing rail having a cross-section deviating from a circular shape; and guide means comprising slide rollers connected rigidly to said door section and guide rails engaged with said slide rollers and supported in the vehicle, said guide rails having angled sections, said slide rollers being adapted to move along said guide rails, said bearing rail being adapted to pivot so as to permit said door section to move in a direction perpendicular to the vehicle side wall when said slide rollers move along the angled sections of said guide rails.
Claim 3
Dependent Claim
15 words
A door as defined in claim 1, wherein said bearing rail has a rectangular cross-section.
Claim 4
Dependent Claim
15 words
A door as defined in claim 1, wherein said bearing rail has an oval cross-section.
Claim 5
Dependent Claim
15 words
A door as defined in claim 1, wherein said bearing rail has straight longitudinal sides.
Claim 6
Dependent Claim
18 words
A door as defined in claim 1, wherein said bearing rail has at least one side open outwardly.
Claim 7
Dependent Claim
16 words
A door as defined in claim 1, wherein at least some of said rollers are cylindrical.
Claim 8
Dependent Claim
28 words
A door as defined in claim 1, wherein said bearing rail has formations so shaped as to define recesses corresponding to and adapted for guiding said guide rollers.
Claim 9
Dependent Claim
15 words
A door as defined in claim 1, wherein said guide rollers constitute double conical rollers.
Claim 10
Dependent Claim
29 words
A door as defined in claim 1, wherein said attachment plate forms a hollow body provided to resist the twisting exerted thereon during the movement of said door section.
Claim 11
Dependent Claim
14 words
A door as defined in claim 1, wherein said hollow body surrounds said rail.
Claim 12
Dependent Claim
21 words
A door as defined in claim 1, and further comprising means for increasing the resistance of the bearing rail to twisting.
Claim 13
Dependent Claim
25 words
A door as defined in claim 11, wherein said resistance increasing means include a formation provided on said bearing rail and having a predetermined shape.
Claim 14
Dependent Claim
14 words
A door as defined in claim 12, wherein said formation has a rectangular cross-section.
Claim 15
Dependent Claim
13 words
A door as defined in claim 12, wherein said formation is circumferentially complete.
Claim 16
Dependent Claim
22 words
A door as defined in claim 1, and further comprising means for movement of said door sections and including a cylinder-piston unit.
Claim 17
Dependent Claim
14 words
A door as defined in claim 15, wherein said cylinder-piston unit is operated pneumatically.
Claim 18
Dependent Claim
27 words
A door as defined in claim 15, wherein said cylinder-piston unit includes a cylinder mounted on said rail and a piston rod connecting to said attachment plate.
Claim 19
Dependent Claim
34 words
A door as defined in claim 1, and further comprising one additional door and corresponding attachment plate section and a synchonizing arrangement operative for synchronizing movement of said door sections relative to each other.
Claim 20
Dependent Claim
33 words
A door as defined in claim 18, wherein said synchronizing arrangement includes an endless drive operatively connecting said one and additional door sections to each other for synchronizing the movement of the same.
Claim 21
Dependent Claim
30 words
A door as defined in claim 19, wherein said endless drive includes at least two return pulleys mounted on said rails and an endless element rotatable about said return pulleys.
Claim 22
Dependent Claim
14 words
A door as defined in claim 20, wherein said endless element is a belt.
Claim 23
Dependent Claim
15 words
A door as defined in claim 20, wherein said endless element is a cable rope.
Claim 24
Dependent Claim
14 words
A door as defined in claim 20, wherein said endless element is a chain.
References Cited (Backward Citations)
US1893377A
Cited
US2570563A
Cited
US2774998A
Cited
US2653022A
Cited
DE1268015B
Cited
DE1708257A1
Cited
US4050191A
Cited
US4091570A
Cited
US4152870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |