Claims
- 1. A fan securing system for securing a fan onto an armature shaft comprising:a nut comprising, a central aperture through a first surface, the central aperture having internally molded threads that engage the armature shaft, and a series of ramps spaced around the central aperture; and a first fan surface portion comprising, a central aperture through which the armature shaft passes, and a series of interruptions configured to interlock with the series of ramps on the nut.
- 2. The fan securing system of claim 1, wherein the series of interruptions comprises recesses shaped to interconnect with the series of ramps on the nut.
- 3. The fan securing system of claim 1, wherein the series of interruptions comprises interlocking ramps that interlock with the series of ramps on the nut.
- 4. The fan securing system of claim 1, wherein the nut has a second closed surface opposite the first surface for completely covering and insulating an end of the armature shaft.
- 5. The fan securing system of claim 4, wherein an outer circumference of the nut between the first surface and the second closed surface comprises at least two flat portions for facilitating tightening of the nut.
- 6. The fan securing system of claim 1 wherein, a washer circumscribes the armature and abuts a second fan surface.
- 7. The fan securing system of claim 6, wherein the washer includes at least one flat portion that corresponds to a flat portion of the armature shaft.
- 8. The fan securing system of claim 1, wherein an angle of inclination of each ramp in the series of ramps is between approximately 2 and 30 degrees.
- 9. The fan securing system of claim 1, wherein an angle of inclination of each ramp in the series of ramps is between approximately 5 and 15 degrees.
- 10. The fan securing system of claim 1, wherein an angle of inclination of each ramp in the series of ramps is between approximately 7 and 9 degrees.
- 11. A blower/vacuum for selective operation in blower mode and suction mode, the blower/vacuum comprising:an armature shaft; a fan mounted on the armature shaft through a central aperture, the fan comprising a first fan surface portion having a series of interruptions; and a nut comprising a central aperture through a first surface, the central aperture having internally molded threads that engage the armature shaft, and a series of ramps spaced around the central aperture configured to interlock with interruptions on the first fan surface portion.
- 12. The blower/vacuum of claim 11, wherein the series of interruptions comprises recesses shaped to interconnect with the series of ramps on the nut.
- 13. The blower/vacuum of claim 11, wherein the series of interruptions comprises interlocking ramps that interlock with the series of ramps on the nut.
- 14. The blower/vacuum of claim 11, wherein the nut has a second closed surface opposite the first surface for completely covering and insulating an end of the armature shaft.
- 15. The blower/vacuum of claim 14, wherein an outer circumference of the nut between the first surface and the second closed surface comprises at least two flat portions for facilitating tightening of the nut.
- 16. The blower/vacuum of claim 11, wherein a washer circumscribes the armature and abuts a second fan surface.
- 17. The blower/vacuum of claim 16, wherein the washer includes at least one flat portion that corresponds to a flat portion of the armature shaft.
- 18. The blower/vacuum of claim 11, wherein an angle of inclination of each ramp in the series of ramps is between approximately 2 and 30 degrees.
- 19. The blower/vacuum of claim 11, wherein an angle of inclination of each ramp in the series of ramps is between approximately 5 and 15 degrees.
- 20. The blower/vacuum of claim 11, wherein an angle of inclination of each ramp in the series of ramps is between approximately 7 and 9 degrees.
- 21. A fan securing system for securing a fan onto an armature shaft comprising:a plastic nut comprising, a central aperture through a first surface, the central aperture having internally molded threads that engage the aperture shaft, and a series of ramps spaced around the central aperture; and a first fan surface portion comprising, a central aperture through which the armature shaft passes, and a series of interruptions configured to interlock with the series of ramps on the nut.
- 22. A blower/vacuum for selective operation in blower mode and suction mode, the blower/vacuum comprising:an armature shaft; a fan mounted on the armature shaft through a central aperture, the fan comprising a first fan surface portion having a series of interruptions; and a plastic nut comprising a central aperture through a first surface, the central aperture having internally molded threads that engage the armature shaft, and a series of ramps spaced around the central aperture configured to interlock with interruptions on the first fan surface portion.
- 23. A fan securing system for securing a fan onto an armature shaft comprising;a nut comprising, a central aperture through a first surface, the central aperture having internally molded threads that engage the armature shaft, and a series of ramps having a first profile, the series of ramps spaced around the central aperture; and a first fan surface portion comprising, a central aperture through which the armature shaft passes, and a series of interruptions defining recesses configured to interlock with the series of ramps on the nut, the series of interruptions having a second profile different an the first profile.
- 24. A blower/vacuum for selective operation in blower mode and suction mode, the blower/vacuum comprising:armature shaft; a fan mounted on the armature shaft through a central aperture, the fan comprising a first fan surface portion having a series of interruptions defining recesses, the series of ramps having a first profile; and a nut comprising a central aperture through a first surface, the central aperture having internally molded threads that engage the armature shaft, and a series of ramps spaced around the central aperture configured to interlock with interruptions on the first fan surface portion, the series of ramps having a second profile different than the first profile.
- 25. The fan securing system of claim 23, wherein the second profile has a uniform thickness.
- 26. The blower/vacuum of claim 24, wherein the second profile has a uniform thickness.
Parent Case Info
This application claims benefit to U.S. provisional application Ser. No. 60/075,310, filed Feb. 20, 1998.
US Referenced Citations (24)
Foreign Referenced Citations (4)
Number |
Date |
Country |
7501390 |
Oct 1975 |
DE |
2942629 |
Oct 1982 |
DE |
3022391 |
Aug 1988 |
DE |
0043538 |
Oct 1982 |
EP |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/075310 |
Feb 1998 |
US |