Bascule bridge with hinged section

Details Bascule bridge with hinged section Bascule bridge with hinged section

1993-05-18

1995-06-06

Pellegrino, Stephen C.

Bridges

Draw

Bascule

14 43, E01D 1506, E01D 1510

Patent

active

054210518

ABSTRACT:
A drawbridge apparatus for reversibly spanning from a first pier to a second pier. The apparatus comprises first and second cantilevered beams, rack and pinion beam drive mechanisms, first and second bascular leaves, first and second hinged leaves, and rack and pinion leaf drive mechanisms. The first and second cantilevered beams are slidably coupled to the first and second piers, respectively. The beams are arranged and configured to project from the first and second bases to a location between the two where the beams make a locking interconnection when the bridge is in its down configuration. The beam drive mechanisms cause the first and second cantilevered beams to slide from and into the first and second bases, respectively. The first and second bascular leaves have first and second counterweight portions and first and second span portions, respectively. The bascular leaves are pivotally coupled to the bases at the intersections of the counterweight portions with the span portions. The first and second hinged leaves have first and second base ends. These base ends are pivotally coupled to the first and second span portions of the bascular leaves. The hinged leaves also have first and second extended ends slidably coupled to the first and second cantilevered beams, respectively. Finally, the leaf drive means are arranged and configured for pivoting the first and second bascular leaves.

REFERENCES:
patent: 173253 (1876-02-01), Adams et al.
patent: 379861 (1888-03-01), Cornell
patent: 383880 (1888-06-01), Harman
patent: 503377 (1893-08-01), Lamont
patent: 534704 (1895-02-01), Worden
patent: 598168 (1898-02-01), Waddell
patent: 683627 (1901-10-01), Vent
patent: 1078293 (1913-11-01), Leslie
patent: 2556175 (1951-06-01), Frost
patent: 2740145 (1956-04-01), Loser
patent: 4169296 (1979-10-01), Wipkink et al.

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