Drive blade lubrication assembly and powered fastener driver containing the same

Patent metadata

Field	Value
Publication number	US-10518396-B2
Application number	US-201415531031-A
Country	US
Kind code	B2
Filing date	Dec 23, 2014
Priority date	Dec 23, 2014
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

A drive blade lubrication assembly for use in a powered fastener driver (10). The powered fastener driver (10) contains a drive blade (42) which snap-fits with a reciprocating piston (58) by a blade seal (103) assembly. The drive blade lubrication assembly contains a lubricant applying member adapted to apply lubricant to a portion of the drive blade (42); and a lubricant storing device which is in fluid communication with the lubricant applying member. The lubricating storing device is adapted to replenish the lubricant in the lubricant applying member. A powered fastener driver (10) containing a drive blade lubrication assembly is also described. The use of the lubricant storing device in the present invention ensures that lubricant is continuously supplied to the drive blade (42) after long time usage of the powered fastener driver (10), so that friction between the drive blade and the blade seal assembly is minimized.

First claim

The invention claimed is:

1. A powered fastener driver comprising a cylinder, a reciprocating piston configured within said cylinder to create a pressure differential; a drive blade at least partially accommodated in said cylinder and operable to drive a fastener upon a driving force resulted from said pressure differential; said drive blade passing though said reciprocating piston and slidable with respect to the latter; wherein said power fastener driver further comprising:
a blade seal located in said reciprocating piston; said blade seal fitting with said drive blade so that said drive blade is adapted to move relative to said reciprocating piston;
a lubricant applying member adapted to apply lubricant to a portion of said drive blade; and
a lubricant storing device which is in fluid communication with said lubricant applying member; said lubricating storing device adapted to replenish said lubricant in said lubricant applying member.

2. The powered fastener driver according to claim 1 , wherein said lubricant applying member is a channel formed in said reciprocating piston which fluidly connects said lubricant storing device to said portion of said drive blade.

3. The powered fastener driver according to claim 2 , wherein said channel is aligned to be substantially perpendicular to a length of said drive blade which is encompassed by said blade seal.

4. The powered fastener driver according to claim 2 , wherein said channel is shielded from the exterior of said reciprocating piston by a covering member.

5. The powered fastener driver according claim to 4 , wherein said at least a portion of said covering member is superimposed with a dust blocking layer; when said portion of said covering member wears out, said dust blocking layer continuing to block dusts in said exterior of said reciprocating piston from entering said channel.

6. The powered fastener driver according to claim 1 , wherein said lubricant storing device is positioned in said reciprocating piston at a location separated from said blade seal along a longitudinal direction of said drive blade.

7. The powered fastener driver according to claim 1 , wherein said lubricant storing device is positioned at a location separated from said blade seal along a radial direction of said reciprocating piston.

8. The powered fastener driver according to claim 1 , wherein said lubricant storing device is a hollow portion formed in said reciprocating piston which is capable of storing a volume of said lubricant.

9. The powered fastener driver according to claim 1 , wherein said lubricant is grease oil.

10. A drive blade lubrication assembly for use in a powered fastener driver, the powered fastener driver comprising a drive blade fitting with a reciprocating piston by a blade seal; said drive blade lubrication assembly comprising:
a lubricant applying member adapted to apply lubricant to a portion of said drive blade; and
a lubricant storing device which is in fluid communication with said lubricant applying member; said lubricating storing device adapted to replenish said lubricant in said lubricant applying member.

11. The drive blade lubrication assembly according to claim 10 , wherein said lubricant applying member is a channel formed in said reciprocating piston which fluidly connects said lubricant storing device to said portion of said drive blade.

12. The drive blade lubrication assembly according to claim 11 , wherein said channel is aligned to be substantially perpendicular to a length of said drive blade which is encompassed by said blade seal.

13. The drive blade lubrication assembly according to claim 11 , wherein said channel is shielded from the exterior of said reciprocating piston by a covering member.

14. The drive blade lubrication assembly according to claim 13 , wherein said at least a portion of said covering member is superimposed with a dust blocking layer; when said portion of said covering member wears out, said dust blocking layer continuing to block dusts in said exterior of said reciprocating piston from entering said channel.

15. The drive blade lubrication assembly according to claim 10 , wherein said lubricant storing device is positioned in said reciprocating piston at a location separated from said blade seal along a longitudinal direction of said drive blade.

16. The drive blade lubrication assembly according to claim 10 , wherein said lubricant storing device is positioned at a location separated from said blade seal along a radial direction of said reciprocating piston.

17. The drive blade lubrication assembly according to claim 10 , wherein said lubricant storing device is a hollow portion formed in said reciprocating piston which is capable of storing a volume of said lubricant.

18. The drive blade lubrication assembly according to claim 10 , wherein said lubricant is grease oil.

19. A powered fastener driver comprising:
a cylinder;
a reciprocating piston within the cylinder;
a seal positioned within the reciprocating piston;
a drive blade operable to drive a fastener, the drive blade extending through the seal and slidable with respect to the reciprocating piston;
a reservoir defined in the reciprocating piston containing a lubricant therein; and
a channel extending between the reservoir and the drive blade to direct lubricant toward the drive blade.

20. The powered fastener driver of claim 19 , further comprising a dust cover at least partially defining the channel.

Assignees

• Techtronic Ind Co Ltd
• Tti Macao Commercial Offshore Ltd

Inventors

• Chen Xingxing
• Zhou Jingfeng
• Ma Liguo
• Zhou Jinlin

Classifications

• B25C1/06

  operated by electric power · CPC title

• B25C1/08

  operated by combustion pressure · CPC title

• B25C1/123

  trigger operated · CPC title

• B25C1/001

  Nail feeding devices (B25C1/184 takes precedence) · CPC title

• B25C5/15

  operated by electric power · CPC title