One-piece combined muffler exhaust outlet and exhaust gas deflector

• US 5,857,329 A
• Filed: 03/14/1997
• Issued: 01/12/1999
• Est. Priority Date: 03/14/1997
• Status: Expired due to Fees

• Current Assignee: Homelite Technologies Limited
• Original Assignee: Deere & Company
• Inventors: Bigham, Harold
• Primary Examiner(s): Denion, Thomas E.
• Application Number:
  US08/818,521
• Time in Patent Office: 669 Days
• Field of Search: 60/317, 60/319, 60/323, 29/890.08, 181/240
• US Class Current: 60/317
• CPC Class Codes: F01N 13/002 Apparatus adapted for particular uses, e.g. for portable devices driven by machines or engines
• CPC Class Codes: F01N 2240/20 a flow director or deflector
• CPC Class Codes: F01N 2450/24 by bolts, screws, rivets or the like
• CPC Class Codes: F01N 2590/06 for hand-held tools or portables devices
• CPC Class Codes: Y10T 29/49398 Muffler, manifold or exhaust pipe making

Abstract

A power tool having an internal combustion engine with a muffler and a combined muffler exhaust outlet and exhaust gas deflector connected to the muffler. The combined outlet and deflector is a single one-piece member. The one-piece member is connected to the muffler by interlocking capture of a portion of the member by the muffler and attachment of a single fastener between the member and the muffler.

Claims

1. In a power tool having an internal combustion engine with a muffler, wherein the improvement comprises:

a combined muffler exhaust outlet and exhaust gas deflector connected at an exterior side of the muffler, the combined muffler exhaust outlet and exhaust gas deflector being comprised of a single one-piece member that is connected to the muffler by interlocking capture of a first portion of the member by the muffler and attachment of a single fastener between a second portion of the member and the muffler.

2. In a power tool as in claim 1 wherein the one-piece member is a flat metal member that is cut and formed.

3. In a power tool as in claim 2 wherein the flat metal member has a first section that is cut and deformed outward to form an exhaust gas entrance and channel.

4. In a power tool as in claim 3 wherein the flat metal member has a second section that is bent around over an outward side of the first section.

5. In a power tool as in claim 4 wherein the first portion extends from a first end of the first section and, a second end of the first section forms the second portion with a hole for the fastener to pass through.

6. In a power tool as in claim 1 wherein the one-piece member has a first section with an exhaust gas entrance and an exhaust gas redirection channel.

7. In a power tool as in claim 6 wherein the one-piece member has a second section that bends around to extend over an outer side of the exhaust gas redirection channel.

8. In a power tool as in claim 7 wherein the second section is spaced from the exhaust gas redirection channel of the first section.

9. A power tool muffler assembly comprising:

a muffler; and

a combined muffler exhaust outlet and exhaust gas deflector, connected to the muffler, which is comprised of a single one-piece member wherein the one-piece member has an interlock mounting portion that extends from a first end of a first section and a second end of the first section has a hole for a fastener to pass through.

10. An assembly as in claim 9 wherein the one-piece member is a flat metal member that is cut and formed.

11. An assembly as in claim 10 wherein the flat metal member forms the first section that is cut and deformed outward to form an exhaust gas entrance and channel.

12. An assembly as in claim 11 wherein the flat metal member has a second section that is bent around over an outward side of the first section.

13. An assembly as in claim 9 wherein the one-piece member has a first section with an exhaust gas entrance and an exhaust gas redirection channel.

14. An assembly as in claim 13 wherein the one-piece member has a second section that bends around to extend over an outer side of the exhaust gas redirection channel.

15. An assembly as in claim 14 wherein the second section is spaced from the exhaust gas redirection channel of the first section.

16. A method of assembling an internal combustion engine muffler assembly comprising steps of:

providing a combined muffler exhaust outlet and exhaust gas deflector having a first end with a retaining leg;

inserting the retaining leg into a mounting aperture of a muffler; and

attaching a single fastener to the muffler and to a second end of the combined outlet and deflector;

wherein the combined outlet and deflector is retained to the muffler only by the single fastener and interlocking engagement between the retaining leg and the muffler.

17. A method as in claim 16 wherein the step of providing a combined outlet and deflector comprises cutting and forming a flat metal member, wherein the combined outlet and deflector is a one-piece member.

18. A method as in claim 17 wherein the flat metal member is cut and deformed to form a first section with an exhaust gas entrance and an exhaust gas redirection channel and, a second section that is bent around and over the first section.