Cutting and dust or slurry collecting assembly and working machine

Patent metadata

Field	Value
Publication number	US-9662800-B2
Application number	US-201213980564-A
Country	US
Kind code	B2
Filing date	Jan 18, 2012
Priority date	Jan 18, 2011
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

A cutting and dust or slurry collecting assembly that includes: a circular saw blade, a blade guard, and a cover device. The cover device has a front end, a rear end, a top surface, a bottom surface, elongated sidewalls, and a longitudinal passage for the saw blade. The blade guard and the cover device are pivotally connected or connectable to one another via a hinge in or adjacent to a lower rear corner of the blade guard. A discharge member is provided at the rear of the hinge and has an outlet which can be connected to a vacuum source. A connection member connects the discharge member with the longitudinal passage and the cut created rear of the longitudinal passage.

First claim

The invention claimed is:

1. A circular saw blade guard assembly comprising:
a blade guard and a blade guard receiver;
said blade guard comprising a cover for covering at least a portion of both a first side and a second side of a saw blade of the circular saw, the blade guard further comprising a first locking formation on an outer surface of said cover, wherein the first locking formation is located at an end portion of the cover of the blade guard and extends over portions of the cover that correlate to both the first side and the second side of the saw blade, the first locking formation including an attachment pattern facing outward from the first side and the second side of the saw blade;
said blade guard receiver comprising a housing which defines a substantially u-shaped opening and a second locking formation on an inner surface of said substantially u-shaped opening, the second locking formation defining a cooperating formation that corresponds to the attachment pattern, the cooperating formation defining protrusions extending substantially toward the first side and the second side of the saw blade;
wherein at least part of said blade guard, including said first locking formation, can be inserted into said substantially u-shaped opening, and wherein said first and second locking formations are arranged to cooperate with one another to lock the blade guard to the blade guard receiver when the blade guard is inserted into the blade guard receiver.

2. A blade guard assembly as claimed in claim 1 , wherein the attachment pattern comprises a molded pattern.

3. A blade guard assembly as claimed in claim 1 , wherein the first locking member comprises a first plurality of ridges and the second locking member comprises a second plurality of ridges which can form an interference fit with said first plurality of ridges.

4. A blade guard assembly as claimed in claim 1 , wherein the first locking member or the second locking member comprises at least one projection and the second locking member or the first locking member respectively comprises at least one recess into which said projection fits.

5. A blade guard assembly as claimed in claim 1 , further comprising a quick release lock, said quick release lock comprising a moveable locking member, which is arranged to fit over at least part of the blade guard when the blade guard is received in the blade guard receiver, and a linking member which connects a portion of the moveable locking member to a portion of the blade guard receiver.

6. A blade guard assembly as claimed in claim 1 , further comprising a splash guard.

7. A blade guard assembly as claimed in claim 6 , wherein said splash guard extends from a lower end of the blade guard receiver housing.

8. A blade guard assembly as claimed in claim 6 , wherein said splash guard is moveable with respect to the blade guard receiver housing from a stop position relatively close to the saw blade, and the splash guard is preferably spring loaded towards the stop position, in which it acts as a barrier between the saw blade and the user.

9. A blade guard assembly as claimed in claim 8 , wherein said splash guard is moveable with respect to the blade guard receiver housing to an upper position, and is preferably held in this position by a simple locking arrangement.

10. A blade guard assembly as claimed in claim 1 , further comprising a hinge for attachment of the blade guard receiver to a cover device that can extend over at least part of the saw blade.

11. A blade guard assembly as claimed in claim 1 , further comprising a guide for guiding movement of the saw blade.

12. A blade guard assembly as claimed in claim 11 , wherein said guide comprises a wheel accessory.

13. The blade guard assembly of claim 1 , wherein the substantially u-shaped opening comprises a first side and a second side, wherein the first side of the substantially u-shaped opening faces the first side of the saw blade and the second side of the substantially u-shaped opening faces the second side of the saw blade.

14. The blade guard assembly of claim 1 , wherein the blade guard receiver is located on a cover device, the cover device comprising a longitudinal passage for receiving the saw blade of the circular saw.

15. The blade guard assembly of claim 14 , wherein a circumferential part of the saw blade can pass beyond a bottom surface of the cover device when the saw blade is received in the longitudinal passage of the cover device.

16. The blade guard assembly of claim 1 , wherein the cover of the blade guard further comprises two sidewalls extending from the end portion to a front portion of the cover, wherein the two sidewalls are united at a top portion of the cover and define an opening at a bottom portion of the cover, wherein the first locking formation is located at the end portion of the cover proximate the bottom portion of the cover.

17. A circular saw blade guard assembly comprising:
a blade guard and a blade guard receiver;
said blade guard comprising a cover for covering at least a portion of both a first side and a second side of a saw blade of the circular saw, the blade guard further comprising a first locking formation on an outer surface of said cover, wherein the first locking formation is located at an end portion of the cover of the blade guard and extends over portions of the cover that correlate to both the first side and the second side of the saw blade, the first locking formation defining protrusions extending outward from the first side and the second side of the saw blade;
said blade guard receiver comprising a housing which defines a substantially u-shaped opening and a second locking formation on an inner surface of said substantially u-shaped opening, the second locking formation defining a cooperating formation that corresponds to the protrusions, the cooperating formation including an attachment pattern extending substantially toward the first side and the second side of the saw blade;
wherein at least part of said blade guard, including said first locking formation, can be inserted into said substantially u-shaped opening, and wherein said first and second locking formations are arranged to cooperate with one another to lock the blade guard to the blade guard receiver when the blade guard is inserted into the blade guard receiver.

18. The blade guard assembly of claim 17 , wherein the cover of the blade guard further comprises two sidewalls extending from the end portion to a front portion of the cover, wherein the two sidewalls are united at a top portion of the cover and define an opening at a bottom portion of the cover, wherein the first locking formation is located at the end portion of the cover proximate the bottom portion of the cover.

Assignees

• Carlsson Pär
• Pinzani Håkan
• Varella Paulo
• Husqvarna Ab

Inventors

• Carlsson Pär
• Pinzani Håkan
• Varella Paulo

Classifications

• B28D1/045

  Sawing grooves in walls; sawing stones from rocks; sawing machines movable on the stones to be cut · CPC title

• B23D45/16

  Hand-held sawing devices with circular saw blades · CPC title

• B28D7/02 Primary

  for removing or laying dust, e.g. by spraying liquids; for cooling work · CPC title

• B26D7/1863 Primary

  by suction · CPC title

• Y10T83/872

  With guard means · CPC title