Trimmer

• US 20070084062A1
• Filed: 10/06/2006
• Published: 04/19/2007
• Est. Priority Date: 10/18/2005
• Status: Abandoned Application

• Current Assignee: Andreas STIHL AG & Company KG (Stihl Holding AG & Company KG)
• Original Assignee: Andreas STIHL AG & Company KG (Stihl Holding AG & Company KG)
• Inventors: Maier, Georg, Elfner, Jorg, Mildner, Marc
• Application Number:
  US11/544,383
• Publication Number:
  US 20070084062A1
• Time in Patent Office: Days
• US Class Current: 30/276
• CPC Class Codes: A01D 34/416 Flexible line cutters
• CPC Class Codes: A01D 34/902 Ergonomic provisions
• CPC Class Codes: A01D 75/20 Devices for protecting men or animals

Abstract

A trimmer comprising a cutting filament head adapted to be rotatably driven by a drive motor. A cutting filament extends out of the cutting filament head and defines a path during a trimming operation. A guard is provided, and in a trimming position of the trimmer a portion of the guard is disposed between the path of the cutting filament and the ground.

Claims

1. A trimmer, comprising:

a cutting filament head, which is adapted to be rotatably driven by a drive motor, wherein a cutting filament is adapted to extend out of said cutting filament head, and wherein during a trimming operation said cutting filament defines a path; and

a guard, wherein in a trimming position of said trimmer a portion of said guard is adapted to be disposed between said path of said cutting filament and a ground surface.

2. A trimmer according to claim 1, wherein a large area of said path of said cutting filament is covered by said guard relative to a ground surface.

3. A trimmer according to claim 1, wherein that portion of said guard that during operation is disposed between said path of said cutting filament and a ground surface is embodied as a base plate.

4. A trimmer according to claim 3, wherein said base plate has a central opening through which said cutting filament head projects, wherein said cutting filament head is provided with an actuation device for effecting a post feeding of cutting filament, and wherein said actuating device extends through said central opening of said base plate.

5. A trimmer according to claim 3, wherein said base plate is flexible and is adapted to act upon an actuating device provided for a post feeding of cutting filament.

6. A brushcutter according to claim 3, wherein said base plate is mounted so as to be rotatable relative to said cutting filament head.

7. A trimmer according to claim 3, wherein a part of said guard is disposed on a side of said path of said cutting filament that during operation faces away from a ground surface.

8. A trimmer according to claim 7, wherein said part of said guard that during operation is disposed on the side of said path of said cutting filament that faces away from the ground surface is embodied as an upper cover plate.

9. A trimmer according to claim 8, which further comprises a housing in which the drive motor is disposed, and a guide tube, wherein said cutting filament head is disposed on an end of said guide tube that is remote from said housing, wherein said base plate is disposed on a side of said path of said cutting filament that is remote from said guide tube, and wherein said upper cover plate is supported on said guide tube or on a gear case of said trimmer.

10. A trimmer according to claim 3, wherein said guard is provided with a peripheral wall that covers a portion of the periphery of said path of said cutting filament.

11. A trimmer according to claim 10, wherein said peripheral wall connects said base plate with an upper cover plate.

12. A trimmer according to claim 1, wherein said guard has an open area along a periphery thereof at which said path of said cutting filament is not covered by said guard.

13. A trimmer according to claim 12, wherein in said open area of said guard said cutting filament projects beyond said guard by more than 5 mm and less than 25 mm.

14. A trimmer according to claim 13, wherein said projection of said cutting filament is approximately 10 mm.

15. A trimmer according to claim 12, wherein said open area of said guard extends over an angle (α

) of at least 180°

.

16. A trimmer according to claim 15, wherein said open area extends over an angle (α

) of about 270°

.

17. A trimmer according to claim 1, which further comprises a device for cutting said cutting filament to length.

18. A trimmer according to claim 17, wherein said device for cutting said cutting filament to length is disposed on an inner side of said guard. 19. A trimmer according to claim 17, wherein said device (32) for cutting said cutting filament to length connects a base plate with an upper cover plate.