James C. Baker
Pharmacy in Littleton, CO

6149067, Nov 21, 2000

Dec 14, 1999

9/460927

George Clinton Brookhart - Littleton CO
James A. Baker - Littleton CO
Paul B. Miller - Highlands Ranch CO

Oldcastle Precast, Inc. - Littleton CO

E01B 100

238 8

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.

5924630, Jul 20, 1999

Jul 21, 1997

8/897391

George Clinton Brookhart - Littleton CO
James A. Baker - Littleton CO
Paul B. Miller - Highlands Ranch CO

Oldcastle Precast, Inc. - Littleton CO

E01C 904

238 8

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.

6016968, Jan 25, 2000

Apr 15, 1999

9/292551

George Clinton Brookhart - Littleton CO
James A. Baker - Littleton CO
Paul B. Miller - Highlands Ranch CO

Oldcastle Precast, Inc. - Littleton CA

E01B 100

238 2

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.

2004022, Nov 11, 2004

May 5, 2003

10/430690

Tom Shillington - Snellville GA, US
Clint Brookhart - Littleton CO, US
James Baker - Littleton CO, US

E04D001/36

052/461000, 052/459000

A precast, concrete slab rail system is provided which includes a resilient boot positioned around at least one rail, and which can be reversibly installed or removed from the concrete slab without the use of attachment hardware or destruction of the concrete slab.