# US 9,517,280 B2 · Ultraviolet disinfection lighting system

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- Number: US 9,517,280 B2
- Document ID: US9517280B2
- Status: Granted
- Kind: B2
- Application number: 14/472,628
- Filed: 2014-08-29
- Published: 2015-03-05
- Granted: 2016-12-13
- Earliest claimed: 2013-08-30
- Assignees: American Air & Water, Inc.
- Applicants: American Air & Water, Inc.
- Inventors: William Warren Lynn; Steven Joseph Jackson, II
- Web page: https://patentgrep.com/patent/US9517280B2

## CPC

- A61L 2/10: Ultraviolet [UV] radiation
- F21V 7/00: Reflectors for light sources (characterised by cooling arrangements F21V29/505)
- F21V 33/0064: {Health, life-saving or fire-fighting equipment}
- A61L 2202/14: Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR

## Abstract

Germicidal light fixtures and germicidal light fixture systems. One embodiment of a germicidal light fixture includes a support structure and at least one first lighting device coupled with the support structure operative to emit ultraviolet radiation at a first predetermined wavelength. At least one second lighting device is coupled with the support structure and is operative to emit ultraviolet radiation at a second predetermined wavelength. The first and second predetermined wavelengths are selected such that ultraviolet radiation emitted from the at least one first lighting device and from the at least one second lighting device, respectively, is operative to inactivate microorganisms. At least one third lighting device is coupled with the support structure and is operative to emit visible radiation.

## Claims

### Claim 1

A germicidal light fixture, comprising:
a support structure;
at least one ultraviolet fluorescent lamp coupled with said support structure operative to emit ultraviolet radiation at a first predetermined wavelength;
at least one ultraviolet light-emitting diode coupled with said support structure operative to emit ultraviolet radiation at a second predetermined wavelength;
wherein said first and second predetermined wavelengths are selected such that ultraviolet radiation emitted from said at least one first lighting device and from said at least one second lighting device, respectively, is operative to inactivate microorganisms; and
at least one third lighting device coupled with said support structure operative to emit visible radiation.

### Claim 2 (depends on 1)

The germicidal light fixture of claim 1, wherein said first predetermined wavelength is equal to said second predetermined wavelength.

### Claim 3 (depends on 1)

The germicidal light fixture of claim 1, wherein said first predetermined wavelength is approximately 253.7 nanometers.

### Claim 4 (depends on 1)

The germicidal light fixture of claim 1, wherein said at least one third lighting device is a fluorescent lighting device.

### Claim 5 (depends on 1)

The germicidal light fixture of claim 1, wherein said visible radiation has a wavelength in the range of about 400 nanometers to about 700 nanometers.

### Claim 6 (depends on 1)

The germicidal light fixture of claim 1, said support structure comprising a reflective backing.

### Claim 7

A germicidal light fixture system, comprising:
a support structure;
a controller;
at least one presence detection sensor in electronic communication with said controller, said at least one presence detection sensor operative to transmit a signal to said controller indicative of the presence of a person;
at least one first lighting device coupled with said support structure operative to emit ultraviolet radiation at a first predetermined wavelength, said first predetermined wavelength selected such that the ultraviolet radiation emitted from said at least one first lighting device is operative to inactivate microorganisms;
said at least one first lighting device having a first longitudinal axis;
at least one reflector coupled with said support structure, said at least one reflector having a second longitudinal axis parallel with said first longitudinal axis; and
said at least one reflector being rotatable about said first longitudinal axis in response to said signal.

### Claim 8 (depends on 7)

The germicidal light fixture system of claim 7, further comprising at least one second lighting device coupled with said support structure operative to emit ultraviolet radiation at a second predetermined wavelength, said second predetermined wavelength selected such that the ultraviolet radiation emitted from said at least one second lighting device is operative to inactivate microorganisms.

### Claim 9 (depends on 8)

The germicidal light fixture system of claim 8, wherein said at least one second lighting device is an ultraviolet light-emitting diode.

### Claim 10 (depends on 7)

The germicidal light fixture system of claim 7, further comprising at least one third lighting device coupled with said support structure operative to emit visible radiation.

### Claim 11 (depends on 7)

The germicidal light fixture system of claim 7, wherein said at least one presence detection sensor is a motion sensor.

### Claim 12 (depends on 7)

The germicidal light fixture system of claim 7, wherein said at least one reflector is formed of a quartz sleeve.

### Claim 13 (depends on 7)

The germicidal light fixture system of claim 7, wherein said at least one reflector is half-cylindrical in shape.

### Claim 14

A germicidal light fixture system, comprising:
a support structure;
a controller in electronic communication with said support structure;
at least one presence detection sensor in electronic communication with said controller, said at least one presence detection sensor operative to transmit a signal to said controller indicative of the presence of a person;
at least one first lighting device coupled with said support structure operative to emit ultraviolet radiation at a first predetermined wavelength;
at least one second lighting device coupled with said support structure operative to emit ultraviolet radiation at a second predetermined wavelength different from the first predetermined wavelength;
wherein said first and second predetermined wavelengths are selected such that the ultraviolet radiation emitted from said at least one first lighting device and from said at least one second lighting device, respectively, is operative to inactivate microorganisms; and
said controller operative to deactivate said at least one first lighting device in response to said signal.

### Claim 15 (depends on 14)

The germicidal light fixture system of claim 14, further comprising a programmable timer in electrical communication with said controller.

### Claim 16 (depends on 14)

The germicidal light fixture system of claim 14, further comprising at least one third lighting device coupled with said support structure operative to emit visible radiation.

### Claim 17 (depends on 14)

The germicidal light fixture system of claim 14, further comprising at least one air-moving device coupled with said support structure.

### Claim 18

A germicidal light fixture, comprising:
a support structure;
at least one first lighting device coupled with said support structure operative to emit ultraviolet radiation at a first predetermined wavelength, said first predetermined wavelength selected such that the ultraviolet radiation emitted from said at least one first lighting device is operative to inactivate microorganisms;
said at least one first lighting device having a first longitudinal axis;
at least one reflector coupled with said support structure, said at least one reflector having a second longitudinal axis parallel with said first longitudinal axis; and
said at least one reflector being rotatable about said first longitudinal axis.

### Claim 19 (depends on 18)

The germicidal light fixture of claim 18, further comprising at least one second lighting device coupled with said support structure operative to emit visible radiation.

### Claim 20 (depends on 18)

The germicidal light fixture of claim 18, further comprising at least one ionizer coupled with said support structure.