Dust collector with filter cleaning mechanism

Patent metadata

Field	Value
Publication number	US-11235433-B2
Application number	US-201816226712-A
Country	US
Kind code	B2
Filing date	Dec 20, 2018
Priority date	Dec 22, 2017
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A dust collector for use with a power tool comprises a housing, a telescoping suction pipe coupled to the housing, a suction fan positioned in the housing and operable to generate a vacuum in the suction pipe, a dust container coupled to the housing and positioned upstream of the fan, a filter at least partially arranged in the dust container, and a filter cleaning mechanism. The filter cleaning mechanism includes an anvil, a striker moveable between a first striker position, in which the striker is spaced from the anvil, and a second striker position, in which the striker is in contact with the anvil. The filter cleaning mechanism further includes an actuator moveable between a first actuator position and a second actuator position, in which the actuator is moved closer to the anvil than in the first position, and a first spring biasing the striker toward the anvil.

First claim

What is claimed is:

1. A dust collector for use with a hand-held power tool, the dust collector comprising:
a housing;
a telescoping suction pipe coupled to the housing;
a suction fan positioned in the housing and operable to generate a vacuum in the suction pipe;
a dust container coupled to the housing and positioned upstream of the fan;
a filter at least partially arranged in the dust container; and
a filter cleaning mechanism including
an anvil,
a striker moveable between a first striker position, in which the striker is spaced from the anvil, and a second striker position, in which the striker is in contact with the anvil,
an actuator moveable between a first actuator position and a second actuator position, in which the actuator is moved closer to the anvil than in the first position, and
a first spring biasing the striker toward the anvil,

wherein in response to the actuator being depressed, the actuator is moved from the first actuator position to the second actuator position and the first spring moves the striker from the first striker position to the second striker position, such that the anvil impacts the filter, thereby dislodging dust and other debris therefrom.

2. The dust collector of claim 1 , wherein the filter cleaning mechanism further includes a second spring positioned between the anvil and the striker, the second spring configured to bias the striker away from the anvil.

3. The dust collector of claim 2 , wherein the second spring moves the striker from the second striker position to the first striker position in response to the actuator being released.

4. The dust collector of claim 3 , wherein the second spring concurrently moves the actuator from the second actuator position to the first actuator position in response to the actuator being released.

5. The dust collector of claim 4 , wherein the second spring has a stiffness that is less than a stiffness of the first spring.

6. The dust collector of claim 1 , wherein the filter cleaning mechanism further includes a mechanism housing coupled to the dust container, and wherein the anvil, the striker, and the first spring are arranged within the mechanism housing.

7. The dust collector of claim 6 , further including an 0 -ring arranged between the mechanism housing and the dust container.

8. The dust collector of claim 6 , wherein in the first striker position, the striker is engaged against an internal shoulder of the mechanism housing, and in response to the actuator moving to the second actuator position, the striker is moved off the internal shoulder by the actuator.

9. The dust collector of claim 8 , wherein the striker includes a striker shoulder that is engaged with the internal shoulder when the striker is in the first striker position.

10. The dust collector of claim 9 , wherein the actuator includes a bore in which the first spring is positioned, wherein the bore is at least partially defined by an annular tapered cam surface, and wherein in response to the actuator moving to the second actuator position, the annular tapered cam surface is engageable with the striker to disengage the striker shoulder from the internal shoulder.

11. The dust collector of claim 10 , wherein the second spring has a stiffness that is less than a stiffness of the first spring, and wherein in response to the striker shoulder disengaging from the internal shoulder, the first spring rebounds to displace the striker toward the second striker position, which also compresses the second spring.

12. The dust collector of claim 1 , wherein the first spring is seated about a perch in the actuator, and wherein the perch defines a perch axis that is offset relative to an anvil axis defined by the anvil.

13. The dust collector of claim 12 , wherein in the first striker position, the striker is not coaxial with the anvil axis, and in the second striker position, the striker is coaxial with the anvil axis.

14. The dust collector of claim 1 , wherein the filter cleaning mechanism further comprises
a mechanism housing coupled to the dust container, and
a bellows at least partially surrounding an end of the actuator protruding from the mechanism housing.

15. The dust collector of claim 1 , wherein the filter cleaning mechanism further comprises a cap positioned between the anvil and the filter, such that in response to the striker impacting the anvil upon reaching the second striker position, the cap vibrates the filter to dislodge the dust and the other debris therefrom.

16. A dust collector for use with a hand-held power tool, the dust collector comprising:
a housing;
a telescoping suction pipe coupled to the housing;
a suction fan positioned in the housing and operable to generate a vacuum in the suction pipe;
a dust container coupled to the housing and positioned upstream of the fan;
a filter at least partially arranged in the dust container; and
a filter cleaning mechanism including
a mechanism housing having an internal shoulder,
an anvil arranged within the mechanism housing and defining an anvil axis,
a striker arranged within the mechanism housing and moveable between a first striker position, in which the striker is engaged against the internal shoulder and spaced from the anvil, and a second striker position, in which the striker is disengaged from the shoulder, in contact with the anvil, and coaxial with the anvil axis,
an actuator moveable between a first actuator position and a second actuator position, in which the actuator is moved closer to the anvil than in the first position, the actuator including an actuator contact portion, and
a spring biasing the striker against the internal shoulder of the mechanism housing and towards the anvil,
wherein in response to movement of the actuator from the first actuator position to the second actuator position, the actuator contact portion moves the striker off of the shoulder and the spring moves the striker from the first striker position to the second striker position.

17. The dust collector of claim 16 , wherein the filter cleaning mechanism further includes a second spring positioned between the anvil and the striker, the second spring configured to bias the striker away from the anvil.

18. The dust collector of claim 16 , wherein the actuator includes a bore in which the first spring is positioned, wherein the bore is at least partially defined by an annular tapered surface, and wherein in response to the actuator moving to the second actuator position, the annular tapered surface is engageable with the striker to disengage the striker shoulder from the internal shoulder.

19. The dust collector of claim 16 , further including an O-ring arranged between the mechanism housing and the dust container.

20. The dust collector of claim 16 , wherein the filter cleaning mechanism further comprises a cap positioned between the anvil and the filter, such that in response to the striker impacting the anvil upon reaching the second striker position, the cap vibrates the filter to dislodge dust and other debris therefrom.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Beeson Joseph R
• Richards Daryl S
• Sigafoose Tyler S
• Zhang cheng liang

Classifications

• B23Q11/0071 Primary

  dust collectors for hand tools · CPC title

• B23B2270/30

  Chip guiding or removal · CPC title

• B23Q11/0046

  by sucking · CPC title

• B01D46/76

  involving vibrations · CPC title

• B25F5/029

  with storage compartments (B25F5/027 takes precedence; handles with provisions for storing tool elements B25C1/08) · CPC title