US4839935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mini arched bridge
Assignee: Parker Hannifin Customer Support Inc
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Filing: 1987-07-13
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Granted: 1989-06-20
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Expires: 2007-07-13
Abstract
Abstract A mini arched bridge is provided with at leat two hollow pans having integral depending sides and ends forming a unitary structure, each side and end of the pans having comparable holes, a plurality of fasteners passing through the holes in adjacent ends of said at least two pans whereby said pans become a single arched member and placing the ends remote from the connection into the earth on opposite sides of the arc to be bridged.
Inventors
- 👤 Robert A. Calcagni
- 👤 Alexander Sheppa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:32
CPC Classifications
E; E01; E01D; E01D4/00; E01D2101/00; E01D2101/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
136 words
A mini arched bridge comprising at least two rigid hollow pans having integral downwardly depending ends and sides forming a unitary structure, each of said pans having an arcuate upper surface arching upwardly in use to support downward loads thereon, said at least two arched pans forming the entire upper surface of said bridge, said ends and sides of each pan extending completely around the perimeter of the pan to provide increased strength and rigidity to the pan and each side and end having comparable holes, a plurality of fasteners passing through the holes in the adjacent ends of each of said at least two pans, and, the ends remote from the connection adapted for placement into the earth on opposite sides of an area to be bridged, whereby said pans become a single arched member.
Claim 2
Dependent Claim
136 words
A mini arched bridge comprising at least two rigid hollow pans having integral downwardly depending ends and sides forming a unitary structure, each of said pans having an arcuate upper surface arching upwardly in use to support downward loads thereon, said at least two arched pans forming the entire upper surface of said bridge, said ends and sides of each pan extending completely around the perimeter of the pan to provide increased strength and rigidity to the pan and each side and end having comparable holes, a plurality of fasteners passing through the holes in the adjacent ends of each of said at least two pans, and, the ends remote from the connection adapted for placement into the earth on opposite sides of an area to be bridged, whereby said pans become a single arched member.
Claim 3
Dependent Claim
16 words
A mini arched bridge as claimed in claim 1 wherein the pans are of rigid metal.
Claim 4
Dependent Claim
24 words
A mini arched bridge as claimed in claim 1 or 2 where the upper surface of each pan is covered with anti skid material.
Claim 5
Dependent Claim
30 words
A mini arched bridge as claimed in claim 1 or 2 wherein said upper pan surfaces are coated in spaced areas from end to end with an anti skid material.
Claim 6
Dependent Claim
28 words
A mini arched bridge as claimed in claim 1 or 2 wherein said pan edges are bolted to a board member carrying hand rails and the like accessories.
Claim 7
Dependent Claim
26 words
A mini arched bridge as claimed in claim 3 wherein said pan edges are bolted to a board member carrying hand rails and the like accessories.
Claim 8
Dependent Claim
26 words
A mini arched bridge as claimed in claim 4 wherein said pan edges are bolted to a board member carrying hand rails and the like accessories.
Claim 9
Dependent Claim
40 words
A mini arched bridge as claimed in claims 1 or 2 wherein the pan edges at the remote ends are connected to a base member, said base member being broader than said bridge whereby shifting of the bridge is reduced.
Claim 10
Dependent Claim
38 words
A mini arched bridge as claimed in claim 3 wherein the pan edges at the remote ends are connected to a base member, said base member being broader than said bridge whereby shifting of the bridge is reduced.
Claim 11
Dependent Claim
38 words
A mini arched bridge as claimed in claim 4 wherein the pan edges at the remote ends are connected to a base member, said base member being broader than said bridge whereby shifting of the bridge is reduced.
Claim 12
Dependent Claim
45 words
A mini arched bridge as claimed in claims 1 or 2 having a tie member extending in a straight line completely beneath and spaced from said single arched member in at least a central portion thereof and connecting the sides at the two remote ends.
Claim 13
Dependent Claim
43 words
A mini arched bridge as claimed in claim 3 having a tie member extending in a straight line completely beneath and spaced from said single arched member in at least a central portion thereof and connecting the sides at the two remote ends.
Claim 14
Dependent Claim
43 words
A mini arched bridge as claimed in claims 4 having a tie member extending in a straight line completely beneath and spaced from said single arched member in at least a central portion thereof and connecting the sides at the two remote ends.
Claim 15
Dependent Claim
16 words
A mini arched bridge as claimed in claim 11 wherein the tie member is a cable.
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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) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |