Sander having two-piece fan

Patent metadata

Field	Value
Publication number	US-9545712-B2
Application number	US-201514722262-A
Country	US
Kind code	B2
Filing date	May 27, 2015
Priority date	Nov 29, 2013
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

A sander may include a housing, a motor, a sanding platen, and a two-piece fan. The motor may be disposed within the housing and may include an output shaft. The sanding platen may be driven by the motor for movement relative to the housing. The fan may be driven by the motor and may include a first piece formed from a first material and a second piece formed from a second material. The first piece may include a disk-shaped body having first and second opposite sides. The first side may include a plurality of first blades extending therefrom. The second side may include a plurality of second blades extending therefrom and a recess formed therein. The second piece may be received in the recess and may include a counterweight boss formed thereon.

First claim

What is claimed is:

1. A sander comprising:
a housing;
a motor disposed within the housing and including an output shaft;
a sanding platen driven by the motor for movement relative to the housing; and
a fan driven by the motor and including a first piece formed from a first material and a second piece formed from a second material;
wherein the second piece is formed from a metallic material;
wherein the second piece comprises more than half of the total mass of the fan;
wherein the fan has a first side facing the motor and a second side opposite the first side and facing away from the motor; and
wherein the fan includes a plurality of first blades extending from the first side and a plurality of second blades extending from the second side.

2. The sander according to claim 1 , wherein the second piece comprises sixty percent or more of the total mass of the fan.

3. The sander according to claim 1 , wherein the first piece is formed from a non-metallic material.

4. The sander according to claim 1 , wherein the first piece is formed from a polymeric material.

5. The sander according to claim 1 , wherein the first piece includes a generally disk shaped body with a first piece first side corresponding to the fan first side and a first piece second side corresponding to the fan second side;
the first piece further including a recess with a central portion and first and second flared radial ends;
wherein the second blades are diposed on the first piece second side around a radial perimeter of the first piece between the first and second flared radial ends.

6. The sander according to claim 1 , wherein the second piece includes an integrally formed hub and drive shaft, the hub engaging the output shaft, the drive shaft extending from the hub and being eccentric relative to the output shaft, the drive shaft drivingly engaging the sanding platen.

7. The sander according to claim 1 , wherein the second piece comprises at least one fan blade; and
wherein the first piece comprises at least one fan blade.

8. The sander according to claim 1 , wherein the second piece includes at least one counterweight.

9. A sander comprising:
a housing;
a motor disposed within the housing and including an output shaft;
a sanding platen driven by the motor for movement relative to the housing; and
a fan driven by the motor, the fan comprising a first piece and a second piece, the first piece being made of a different material than the second piece;
wherein the second piece includes an integrally formed hub and drive shaft, the hub engaging the output shaft, the drive shaft extending from the hub and eccentric relative to the output shaft, the drive shaft drivingly engaging the sanding platen;
wherein the second piece includes a counterweight;
wherein the fan has a first side facing the motor and a second side opposite the first side and facing away from the motor; and
wherein the fan includes a plurality of first blades extending from the first side and a plurality of second blades extending from the second side.

10. The sander of claim 9 , wherein the second piece is formed of a metallic material and wherein the wherein the first piece is formed of a non-metallic material.

11. The sander of claim 10 , wherein the first piece includes a recess and the second piece is received in the recess.

12. The sander of claim 11 , wherein the first piece includes at least four of the first blades and at least four of the second blades.

13. The sander of claim 12 , wherein the first piece includes more first blades than second blades.

14. The sander of claim 9 , wherein the first piece includes a generally disk shaped body with a first piece first side corresponding to the fan first side and a first piece second side corresponding to the fan second side;
the first piece further including a recess with a central portion and first and second flared radial ends;
wherein the second blades are diposed on the first piece second side around a radial perimeter of the first piece between the first and second flared radial ends.

15. The sander of claim 9 , wherein the second piece comprises a central portion, a first flared radial end and a second flared radial end;
wherein the second piece includes a second piece second side corresponding to the second side of the fan;
wherein the second piece at the second piece second side includes a second side face which is generally in a single plane throughout at least most of the central portion and the first flared radial end.

16. A sander comprising:
a housing;
a motor disposed within the housing and including an output shaft;
a sanding platen driven by the motor for movement relative to the housing; and
a fan driven by the motor and including a first piece formed from a first material and a second piece formed from a second material;
wherein the second piece includes a hub and drive shaft, the hub engaging the output shaft, the drive shaft extending from the hub, the drive shaft drivingly engaging the sanding platen;
wherein the fan has a first side facing the motor and a second side opposite the first side and facing away from the motor; and
wherein the fan includes at least four first blades extending from the first side and at least four second blades extending from the second side.

17. The sander according to claim 16 , wherein the second piece is made of a metallic material and further comprises a counterweight.

18. The sander according to claim 16 , wherein the second piece further comprises at least one of the second blades.

19. The sander according to claim 16 , wherein the first piece includes a generally disk shaped body with a first piece first side corresponding to the fan first side and a first piece second side corresponding to the fan second side;
the first piece further including a recess with a central portion and first and second flared radial ends;
wherein the second blades are diposed on the first piece second side around a radial perimeter of the first piece between the first and second flared radial ends.

20. The sander according to claim 16 , wherein the second piece comprises a central portion, a first flared radial end and a second flared radial end;
wherein the second piece includes a second piece second side corresponding to the second side of the fan;
wherein the second piece at the second piece second side includes a second side face which is generally in a single plane throughout at least most of the central portion and the first flared radial end.

Assignees

• Black & Decker Inc
• Black & Dekcer Inc

Inventors

• Kuehne Brent A
• Kelican Jr Earl
• Wang Xin Lei
• Chen Feng
• Zheng Pei Zhong

Classifications

• B25F5/008 Primary

  Cooling means · CPC title

• B24B23/04

  with oscillating grinding tools; Accessories therefor · CPC title

• B24B23/00

  Portable grinding machines, e.g. hand-guided; Accessories therefor (B24B7/18 takes precedence; for grinding seat surfaces B24B15/00; having a flexible shaft B24B27/027; grinders for cutting-off B24B27/08; dust extraction equipment B24B55/10; details or components, e.g. casings, bodies of portable power-driven tools not particularly related to the operation performed B25F5/00) · CPC title

• B24B55/10

  specially designed for portable grinding machines, e.g. hand-guided · CPC title

• B24B55/105

  with oscillating tools · CPC title