Patent US4319375A successfully refreshed from Google Patents.
US4319375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for folding the spans of a bridge for transport on a vehicle
Assignee: Dr Ing HCF Porsche AG
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Filing: 1979-11-26
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Granted: 1982-03-16
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Expires: 1999-11-26
Abstract
Abstract A transportable bridge unit has bridge spans located side-by-side and held apart with a space between the spans by crosspieces which include spars connected heightwise to the bridge spans and to a central transverse web in a manner that enables the spans to change their positions relative to each other. According to a preferred embodiment, holders are provided for interconnection of the transverse web with the spars connected to the bridge spans into which connecting pins are insertable. By removal of both pins, the bridge spans can be disconnected from the transverse web and carried adjacent one another on a transporting vehicle, while removal of only the upper one of the connecting pins from its receiving holder enables the spans to pivot about the lower connecting pin so that the spans can be folded downwardly relative to the transverse web against one another so as to be transportable in a connected condition that is reduced in its transverse extent relative to its operational width.
Inventors
- 👤 Jurgen Mahncke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:15
CPC Classifications
E; E01; E01D; E01D15/00; E01D15/12; E01D15/124
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
A transportable bridge unit comprising bridge spans located side-by-side and held apart by crosspieces, with a space between said spans, for transport aboard a vehicle, characterized by the fact that the crosspieces comprise spars connected heightwise to said bridge spans and to a central transverse web, which extends transversely between the spars at a central portion of the bridge, for interconnecting said bridge spans in a manner enabling the spans to change their positions relative to each other, wherein the transverse web is provided with pivot holders at its ends, said pivot holders being spaced from each other as viewed vertically, and further comprising connecting pins for connection of said bridge by joining of said spars with the transverse web.
Claim 2
Dependent Claim
120 words
A transportable bridge unit comprising bridge spans located side-by-side and held apart by crosspieces, with a space between said spans, for transport aboard a vehicle, characterized by the fact that the crosspieces comprise spars connected heightwise to said bridge spans and to a central transverse web, which extends transversely between the spars at a central portion of the bridge, for interconnecting said bridge spans in a manner enabling the spans to change their positions relative to each other, wherein the transverse web is provided with pivot holders at its ends, said pivot holders being spaced from each other as viewed vertically, and further comprising connecting pins for connection of said bridge by joining of said spars with the transverse web.
Claim 3
Dependent Claim
25 words
Device according to claim 1, characterized by the fact that the spars are connected releasably with the transverse web by means of said connecting pins.
Claim 4
Dependent Claim
46 words
Bridge unit according to claims 1 or 2, characterized by the fact that a lower holder of the transverse web is designed as a pivot bearing about which the spans connected with the spars can be folded downward relative to said transverse web, against one another.
Claim 5
Dependent Claim
112 words
A transportable bridge unit comprising bridge spans located side-by-side and held apart by crosspieces, with a space between said spans, for transport aboard a vehicle, characterized by the fact that the crosspieces comprise rigid spars each of which is connected to one of said bridge spans and to a central transverse web, which extends transversely between the spars at a central portion of the bridge, by pivotal connecting means for rigidly interconnecting said bridge spans, said pivotal connecting means being at least partially disconnectable for enabling the spans to change their positions relative to each other between an in-use configuration capable of being traveled upon and a non-functional compacted vehicle transportable configuration.
Claim 6
Dependent Claim
112 words
A transportable bridge unit comprising bridge spans located side-by-side and held apart by crosspieces, with a space between said spans, for transport aboard a vehicle, characterized by the fact that the crosspieces comprise rigid spars each of which is connected to one of said bridge spans and to a central transverse web, which extends transversely between the spars at a central portion of the bridge, by pivotal connecting means for rigidly interconnecting said bridge spans, said pivotal connecting means being at least partially disconnectable for enabling the spans to change their positions relative to each other between an in-use configuration capable of being traveled upon and a non-functional compacted vehicle transportable configuration.
Claim 7
Dependent Claim
24 words
Device according to claim 4, characterized by the fact that the spars are connected releasably with the transverse web by means of connecting pins.
Claim 8
Dependent Claim
44 words
Bridge unit according to claim 5, characterized by the fact that a lower holder of the transverse web is designed as a pivot bearing about which the spans connected with the spars can be folded downward relative to said transverse web, against one another.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-15 | 1985-09-14 | 1986-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-15 | 1989-09-14 | 1990-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-15 | 1993-09-14 | 1994-03-16 | $7700.00 | Window Closed / Lapsed |