# US 7,744,010 B2 · Rail anchor isolator for railroad tie

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- Number: US 7,744,010 B2
- Document ID: US7744010B2
- Status: Granted
- Kind: B2
- Application number: 12/220,659
- Filed: 2008-07-28
- Published: 2010-01-28
- Granted: 2010-06-29
- Earliest claimed: 2008-07-28
- Assignees: Unit Rail Anchor Company
- Inventors: Martin Earl Reed
- Web page: https://patentgrep.com/patent/US7744010B2

## CPC

- E01B 13/02: Rail anchors
- E01B: PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS (derailing or rerailing blocks on track, track brakes or retarders B61K)

## Abstract

The present invention provides an isolator particularly adapted for use with a rail anchor utilized in an application where railroad rail is installed on concrete ties. The isolator protects the concrete tie from contact with the rail anchor caused by longitudinal movement of the rail due to train acceleration of deceleration or expansion and contraction due to temperature changes. In one embodiment, the isolator is comprised of a structural plastic material and includes a front face section and a rear face section. The front face section and rear face section each comprise a generally rectangular structure, having a top edge, bottom edge, and side edges. Top and bottom sections join the front face section and rear face section and form part of the isolator. The rail anchor also comprises a support section that extends from an intersection of the rear face section with the bottom section. The rail isolator is designed to be embedded in a concrete railroad tie.

## Claims

### Claim 1

An isolator for use with a concrete railroad tie,
the isolator comprising:
a structure including a front face section and a rear face section,
the front face section comprising a generally rectangular structure, having a top edge, bottom edge and two side edges,
the rear face section comprising a generally rectangular structure, having a top edge, bottom edge and two side edges,
a bottom section that joins the front face section and the rear face section,
and a top section,
and a support section that extends outwardly and downwardly from an intersection of the rear face section with the bottom section,
wherein the support section extends inwardly beyond the rear face section,
and wherein the support section extends downwardly beyond the bottom section.

### Claim 2 (depends on 1)

The isolator of claim 1
wherein the isolator is a unitary structure comprised of a structural plastic material.

### Claim 3 (depends on 1)

The isolator of claim 1
wherein the isolator is comprised of a structural plastic material that is an electrical insulator.

### Claim 4 (depends on 1)

The isolator of claim 1
where in the bottom section, the support section, and rear face section and at least a portion of the top section of the isolator are embedded in the concrete railroad tie.

### Claim 5

An isolator for use with a concrete railroad tie,
the isolator comprising:
a front face section and a rear face section,
the front face section comprising a generally rectangular structure having a top edge, bottom edge and two side edges,
the rear face section comprising a generally rectangular structure having a top edge, bottom edge and two side edges,
a bottom section that joins the front face section and the rear face section,
and a top section,
and a support section that extends downwardly from an intersection of the rear face section with the bottom section,
wherein the support section extends inwardly beyond the rear face section,
and wherein the support section extends downwardly beyond the bottom section.

### Claim 6 (depends on 5)

The isolator of claim 5
wherein the isolator is a unitary structure comprised of a structural plastic material.

### Claim 7 (depends on 5)

The isolator of claim 5
wherein the isolator is comprised of a structural plastic material that is an electrical insulator.

### Claim 8 (depends on 5)

The isolator of claim 5
wherein the bottom section, the support section, the rear face section and at least a portion of the top section of the isolator are embedded in the concrete railroad tie.

### Claim 9

An isolator for use with a concrete railroad tie,
the isolator comprising;
a front face section and a rear face section,
the front face section comprising a generally rectangular structure having a top edge,
bottom edge and two side edges,
the rear facing section comprising a generally rectangular structure having a top edge,
bottom edge and two side edges,
a bottom section that joins the front face section and the rear face section,
and a top section,
and a support section that extends outwardly from an intersection of the rear face section with the bottom section,
wherein the support section extends inwardly beyond the rear face section,
and wherein the support section extends downwardly beyond the bottom section.

### Claim 10 (depends on 9)

The isolator or claim 9
wherein the isolator is a unitary structure comprised of a structural plastic material.

### Claim 11 (depends on 9)

The isolator of claim 9
wherein the isolator is comprised of a structural plastic material that is an electrical insulator.

### Claim 12 (depends on 9)

The isolator of claim 9
wherein the bottom section, the support section, the rear face section and at least a portion of the top section of the isolator are embedded in the concrete railroad tie.