Suche in nationalen und internationalen Patentsammlungen
Einige Inhalte dieser Anwendung sind momentan nicht verfügbar.
Wenn diese Situation weiterhin besteht, kontaktieren Sie uns bitte unterFeedback&Kontakt
1. (WO2019049045) DUAL BLADE WALK-BEHIND MOWER
Anmerkung: Text basiert auf automatischer optischer Zeichenerkennung (OCR). Verwenden Sie bitte aus rechtlichen Gründen die PDF-Version.

THAT WHICH IS CLAIMED:

1. A lawn mower (100) comprising:

a blade housing (200);

a power source (110) supported at least in part by the blade housing (200) to selectively rotate a drive shaft (281);

a mobility assembly (120) comprising a first set of wheels (240) and second set of wheels (242) operably coupled to the blade housing (200);

a first cutting blade (210) and a second cutting blade (212) disposed to be rotatable within the blade housing (200) in a same plane such that respective blade orbits of the first cutting blade (210) and the second cutting blade (212) at least partially overlap at an overlap region; and

a power transfer assembly (140) operably coupled to the drive shaft (281) and configured to drive the first cutting blade (210) and the second cutting blade (212) to rotate within the blade housing (200) in opposite directions and control timing of passage of the first cutting blade (210) and the second cutting blade (212) through the overlap region, wherein the blade housing (200) is configured to be operably coupled to a bagging attachment (250) via a first discharge tunnel (260) disposed proximate to the first cutting blade (210) and a second discharge tunnel (262) disposed proximate to the second cutting blade (212), and

wherein the first cutting blade (210) rotates to generate a first flow path along a first side of the blade housing (200) toward the first discharge tunnel (260) and the second cutting blade (212) rotates to generate a second flow path along a second side of the blade housing (200) toward the second discharge tunnel (262).

2. The lawn mower (100) of claim 1, wherein the first and second discharge tunnels (260 and 262) mirror each other with respect to a longitudinal centerline of the lawn mower (100).

3. The lawn mower (100) of claim 1, wherein the first and second discharge tunnels (260 and 262) are removably mounted to the blade housing (200).

4. The lawn mower (100) of claim 1, wherein the first and second discharge tunnels (260 and 262) are fixedly mounted to the blade housing (200).

5. The lawn mower (100) of claim 1, wherein the blade housing (200) further comprises guide vanes directing clippings/debris toward respective ones of the first and second discharge tunnels (260 and 262).

6 The lawn mower (100) of claim 1, wherein the blade housing (200) comprises full length baffles (272) outlining portions of the blade orbits of the first and second cutting blades (210 and 212) other than at the overlap region.

7. The lawn mower (100) of claim 6, wherein the blade housing (200) comprises partial length baffles (274) inside the blade orbits of the first and second cutting blades (210 and 212) to direct flows of clippings/debris within the blade housing (200).

8. The lawn mower (100) of any preceding claim, wherein the blade orbits are symmetrical about a longitudinal centerline of the lawn mower (100), and wherein a first rotatable shaft (220) to which the first cutting blade (210) is operably coupled and a second rotatable shaft (222) to which the second cutting blade (212) is operably coupled are each equidistant from the longitudinal centerline of the lawn mower (100).

9. The lawn mower (100) of claim 1, wherein the wherein the first cutting blade (210) is operably coupled to a first rotatable shaft (220) and the second cutting blade (212) is operably coupled to a second rotatable shaft (222), and wherein the power transfer assembly (140) comprises a drive belt (280) operably coupled between only one of the first rotatable shaft (220) or the second rotatable shaft (222) and the drive shaft (281).

10. The lawn mower (100) of claim 9, wherein the first rotatable shaft (220) and the second rotatable shaft (222) are operably coupled to each other such that timing of passage of the first cutting blade (210) and the second cutting blade (212) through the overlap region is controlled to prevent the first and second cutting blades (210 and 212) from being in the overlap region at the same time.

11. The lawn mower (100) of claim 10, wherein, in response to the first cutting blade (210) being substantially perpendicular to a longitudinal centerline of the lawn mower (100), the second cutting blade (212) is disposed substantially parallel to the longitudinal centerline and the first cutting blade (210), and

wherein, in response to the second cutting blade (212) being substantially perpendicular to the longitudinal centerline, the first cutting blade (210) is disposed substantially parallel to the longitudinal centerline and the second cutting blade (212).

12. The lawn mower (100) of claim 10, wherein the first rotatable shaft (220) is driven by the drive shaft (281), and the second rotatable shaft (222) is driven via the first rotatable shaft (220).

13. The lawn mower (100) of any of claims 1 to 12, wherein the power transfer assembly (140) comprises an even number of gears.

14. The lawn mower (100) of any of claims 1 to 13, wherein the lawn mower (100) comprises a walk-behind lawn mower (100).

15. A power transfer assembly (140) of a lawn mower (100), the power transfer assembly (140) comprising:

a drive belt (280) operably coupling a drive shaft (281) of an engine of the lawn mower (100) to at least one of a first cutting blade (210) and a second cutting blade (212) disposed to be rotatable in a same plane within a blade housing (200) of the lawn mower (100) such that respective blade orbits of the first cutting blade (210) and the second cutting blade (212) at least partially overlap at an overlap region,

wherein the power transfer assembly (140) is configured to drive the first cutting blade (210) and the second cutting blade (212) to rotate within the blade housing (200) in opposite directions and control timing of passage of the first cutting blade (210) and the second cutting blade (212) through the overlap region.

16. The power transfer assembly (140) of claim 15, wherein the blade orbits are symmetrical about a longitudinal centerline of the lawn mower (100), and wherein a first rotatable shaft (220) to which the first cutting blade (210) is operably coupled and a second rotatable shaft (222) to which the second cutting blade (212) is operably coupled are each equidistant from the longitudinal centerline of the lawn mower (100).

17. The power transfer assembly (140) of claim 15, wherein the wherein the first cutting blade (210) is operably coupled to a first rotatable shaft (220) and the second cutting blade (212) is operably coupled to a second rotatable shaft (222), and wherein the drive belt (280) is operably coupled between only one of the first rotatable shaft (220) or the second rotatable shaft (222) and the drive shaft (281).

18. The power transfer assembly (140) of claim 17, wherein the first rotatable shaft (220) and the second rotatable shaft (222) are operably coupled to each other such that timing of passage of the first cutting blade (210) and the second cutting blade (212) through the overlap region is controlled to prevent the first and second cutting blades (210 and 212) from being in the overlap region at the same time.

19. The power transfer assembly (140) of claim 17, wherein the first rotatable shaft (220) is driven by the drive shaft (281), and the second rotatable shaft (222) is driven via the first rotatable shaft (220).

20. The power transfer assembly (140) of claim 15, wherein, in response to the first cutting blade (210) being substantially perpendicular to a longitudinal centerline of the lawn mower (100), the second cutting blade (212) is disposed substantially parallel to the longitudinal centerline and the first cutting blade (210), and

wherein, in response to the second cutting blade (212) being substantially perpendicular to the longitudinal centerline, the first cutting blade (210) is disposed substantially parallel to the longitudinal centerline and the second cutting blade (212).

21. The power transfer assembly (140) of any of claims 15 to 20, wherein the power transfer assembly (140) comprises an even number of gears.