# US 5,342,143 A · System and method for controlling emissions created by spraying liquids from moving vehicles

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- Number: US 5,342,143 A
- Document ID: US5342143A
- Status: Granted
- Kind: A
- Application number: 08/163,937
- Filed: 1993-12-08
- Granted: 1994-08-30
- Earliest claimed: 1993-01-05
- Assignees: Manhole Adjusting Contractors Inc.
- Inventors: John Corcoran; Joseph W. Hower; William A. Moseley
- Web page: https://patentgrep.com/patent/US5342143A

## CPC

- E01C 19/176: {Spraying or throwing elements, e.g. nozzles; Arrangement thereof or supporting structures therefor, e.g. spray-bars}
- E01C 19/17: Application by spraying {or throwing}
- E01C: CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR (forming roads or like surfaces by compacting or grading snow or ice E01H)

## Abstract

A system and a method for controlling emissions caused by spraying liquids from a moving vehicle onto a pavement surface use a vacuum hood mountable to the vehicle and a fan for creating a partial vacuum within the hood to draw air containing emissions into the hood for collection. A filter or other suitable apparatus is used to extract the emissions before the air is discharged to the atmosphere. The vacuum hood is located above the sprayed surface and is preferably located behind the nozzle. It has a primary opening at its forward end for collection of air adjacent the nozzle and a smaller, auxiliary opening behind the primary opening.

## Claims

### Claim 1

A system for controlling emissions created by spraying a heated liquid paving composition from at least one nozzle of a moving vehicle onto a pavement surface, comprising:
a vacuum hood positionable adjacent said at least one nozzle and above said pavement surface, said vacuum hood having at least one inlet and at least one outlet;
a mechanism communicating with said at least one outlet to create a partial vacuum within the vacuum hood and draw air containing said emissions through said at least one inlet; and
apparatus for receiving said air and extracting said emissions therefrom.

### Claim 2 (depends on 1)

The system of claim 1 wherein:
said mechanism comprises a fan.

### Claim 3 (depends on 1)

The system of claim 1 wherein:
the vacuum hood has a forward end and a rearward end; and
said at least one inlet comprises a primary opening adjacent said forward end.

### Claim 4 (depends on 3)

The system of claim 3 wherein:
the vacuum hood has a flap adjacent said at least one inlet.

### Claim 5 (depends on 4)

The system of claim 4 wherein:
said flap is flexible and extends downwardly from the underside of the vacuum hood.

### Claim 6 (depends on 1)

The system of claim 1 wherein:
the vacuum hood extends transversely across the vehicle.

### Claim 7 (depends on 1)

The system of claim 1 wherein:
said apparatus for receiving air and extracting emissions therefrom comprises a filter structure.

### Claim 8 (depends on 7)

The system of claim 7 wherein:
said filter structure has at least one preliminary stage to extract relatively large particulate matter and at least one subsequent stage for extracting extremely fine particulate emissions.

### Claim 9 (depends on 1)

The system of claim 1 for use in controlling emissions created by spraying a heated asphalt-rubber composition.

### Claim 10 (depends on 1)

The system of claim 1 for use in controlling emissions created by spraying heated pavement grade oil containing a synthetic polymer.

### Claim 11 (depends on 10)

The system of claim 10 wherein:
said filter means comprises at least one preliminary stage to extract relatively large particulate matter and at least one subsequent stage for extracting extremely fine particulate emissions.

### Claim 12

A method for controlling emissions created by spraying a heated liquid paving composition from at least one nozzle of a moving vehicle onto a pavement surface, comprising:
providing a vacuum hood adjacent said at least one nozzle and above the pavement surface, the vacuum hood having at least one inlet and at least one outlet;
spraying the heated liquid paving composition from said at least one nozzle as said vehicle moves;
creating a partial vacuum within the vacuum hood to draw air containing emissions from the spraying operation through said at least one inlet;
extracting said emissions from said air; and
exhausting to the atmosphere said air from which said emissions have been extracted.