Environmentally sound and safe apparatus for removing coatings

• US 5,575,035 A
• Filed: 01/24/1996
• Issued: 11/19/1996
• Est. Priority Date: 01/24/1996
• Status: Expired due to Term

• Current Assignee: Northrop Grumman Systems Corporation (Northrop Grumman Corporation)
• Original Assignee: Northrop Grumman Corporation
• Inventors: Osterman, Richard A., Reis, Carl A., Castellucci, Nicholas T.
• Primary Examiner(s): MOORE, CHRISTOPHER K
• Application Number:
  US08/590,798
• Time in Patent Office: 300 Days
• Field of Search: 15/345, 15/339, 15/401, 15/324, 15/371
• US Class Current: 15/324
• CPC Class Codes: A47L 13/02 Scraping
• CPC Class Codes: B44D 3/164 comprising blades
• CPC Class Codes: B44D 3/168 by electrically heating air heaters using electric energy supply, the air being in direct contact with the heating medium, F24H3/0405

Abstract

The present invention is a hand held tool for removing coatings from a substrate. The hand held tool includes a housing having a front section with an outlet, a mid section with an inlet, and a rear section, a heat source disposed within the front section of the housing for emitting heat through the outlet, and a vacuum source disposed within the mid section of the housing for providing suction through the inlet. The hand held coating remover further includes a power source disposed within the rear section for supplying power to the heat source and the vacuum source, a control panel having a heat controller for adjusting and controlling the heat emitted from the heat source through the outlet and a vacuum controller for adjusting and controlling the suction provided by the vacuum through the inlet, and a blade located adjacent to the inlet and resiliently coupled to the housing. The coating is safely removed from the substrate by first heating the coating, moving the blade across the heated coating to scape the coating, and vacuuming the coating as it is scraped or removed from the substrate. Also, any fumes that are created when the coating is heated is easily removed by the vacuum.

Claims

1. An apparatus for removing coatings from a substrate, comprising:

a housing having a front section with an outlet, a mid section with an inlet, and a rear section;

a heat source disposed within said front section of said housing for emitting heat through said outlet;

a vacuum source disposed within said mid section of said housing for providing suction through said inlet;

a power source disposed within said rear section for supplying power to said heat source and said vacuum source;

a control panel having heat controller means for adjusting and controlling said heat emitted from said heat source through said outlet and a vacuum controller means for adjusting and controlling said suction provided by said vacuum through said inlet; and

a blade located adjacent to said inlet and resiliently coupled to said housing for resiliently urging said blade against said substrate, wherein said blade is moved across said substrate for scraping and removing said coating from said substrate, and wherein said blade is under compression while in contact with said coating of said substrate.

2. The invention as set forth in claim 1, wherein the heat source is an infrared heater.

3. The invention as set forth in claim 1, further comprising a view window disposed within said front section at an opposite end from said outlet.

4. The invention as set forth in claim 3, further comprising a light source disposed within said front section between said view window and said outlet at an angle suitable to provide light to an area on said substrate adjacent said outlet, wherein said light source is coupled to said power source.

5. The invention as set forth in claim 4, wherein said control panel further comprises a light controller means for controlling and adjusting an intensity of said light source.

6. The invention as set forth in claim 5, wherein said heat controller means, said vacuum controller means, and said light controller means are rheostats.

7. The invention as set forth in claim 1, further comprising a roller rotatably coupled between said rear section and said substrate.

8. The invention as set forth in claim 1, wherein said blade is coupled to said housing with a helical spring.

9. The invention as set forth in claim 1, further comprising an infrared shield extending from said outlet toward said substrate for focussing said heat emitted through said outlet onto a concentrated area of said substrate.

10. The invention as set forth in claim 1, wherein said heat controller means and said vacuum controller means are rheostats.

11. A compact hand held coating remover for removing coatings on a substrate, comprising:

a housing having a front section with an outlet, a mid section with an inlet, and a rear section;

an infrared heater disposed within said front section of said housing for emitting heat through said outlet;

a vacuum source disposed within said mid section of said housing for providing suction through said inlet;

a view window disposed within said front section at an opposite end from said outlet;

a light source disposed within said front section between said view window and said outlet at an angle suitable to provide light to an area on said substrate adjacent said outlet;

a power source disposed within said rear section for supplying power to said infrared heater, said vacuum source, and said light source;

a control panel having a heat controller for adjusting and controlling said heat emitted from said infrared heater, a vacuum controller for adjusting and controlling said suction provided by said vacuum, and a light controller for controlling and adjusting an intensity of said light source;

a roller rotatably coupled between said rear section and said substrate and

a blade located adjacent to said inlet and resiliently coupled to said housing for resiliently urging said blade against said substrate, wherein said blade is moved across said substrate for scraping and removing said coating from said substrate, and wherein said blade is under compression while in contact with said coating of said substrate.

12. The invention as set forth in claim 11, wherein said blade is coupled to said housing with a helical spring.

13. The invention as set forth in claim 11, further comprising an infrared shield extending from said outlet toward said substrate for focussing said heat emitted through said outlet onto a concentrated area of said substrate.

14. The invention as set forth in claim 11, wherein said heat controller means and said vacuum controller means are rheostats.