Railways: surface track – Roadbed – Street crossing
Patent
1997-07-21
1999-07-20
Morano, S. Joseph
Railways: surface track
Roadbed
Street crossing
E01C 904
Patent
active
059246308
ABSTRACT:
The present invention discloses a precast railway crossing slab adapted to extend transversely across the surface of conventional railway ties, with slots or gaps dimensioned and disposed to receive a pair of railway rails therethrough. The crossing slab includes a post-tensioning system in which metal cable strands or tendons are sheathed within plastic tubes and are positioned in the slab mold frame prior to pouring of concrete. Tendon anchors are also disposed in the slab mold frame prior to pouring. After the concrete hardens, a hydraulic jack is used to tension and anchor the tendons in a stressed condition, thus providing reinforcement to the slab. The railway crossing slab of the present invention may be utilized with or without surface or edge metal plating. Flange way fillers which typically comprise rubber strips extending between the sidewalls of the metal rail and the concrete slab may optionally be employed. The slab may be formed integrally with grooves to receive the rails, or alternatively may take the form of three separate slabs provided with screw holes for securement to conventional wooden or concrete railway ties.
REFERENCES:
patent: 3317137 (1967-05-01), Harmon
patent: 3612394 (1971-10-01), Gagnon
patent: 4641779 (1987-02-01), O'Brien et al.
patent: 4899933 (1990-02-01), Martin
patent: 4911360 (1990-03-01), Spurr
patent: 5181657 (1993-01-01), Davis
patent: 5353987 (1994-10-01), Kusakabe et al.
patent: 5535948 (1996-07-01), Williams
patent: 5626289 (1997-05-01), Demers, Jr. et al.
Baker James A.
Brookhart, Jr. George Clinton
Miller Paul B.
Morano S. Joseph
Oldcastle Precast, Inc.
LandOfFree
Precast reinforced concrete railway crossing slab does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Precast reinforced concrete railway crossing slab, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precast reinforced concrete railway crossing slab will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1315159