Chainsaw and lubrication system for chainsaw guide bar

Patent metadata

Field	Value
Publication number	US-2023321863-A1
Application number	US-202318131943-A
Country	US
Kind code	A1
Filing date	Apr 7, 2023
Priority date	Apr 11, 2022
Publication date	Oct 12, 2023
Grant date	—

Abstract

A chainsaw, a lubrication system for a chainsaw, and a lubricant for a chainsaw are provided. The chainsaw includes a lubrication system and guide bar extending from a housing. The lubrication system includes a reservoir at which a lubricant is contained. The reservoir is releasably attachable to a machine drive device. The machine drive device includes a body at which a pump apparatus is positioned. The machine drive device forms an inlet opening in fluid communication with the reservoir. The machine drive device forms an outlet opening at which a conduit is fluidly coupled to receive the lubricant. The conduit forms a conduit outlet through which the lubricant is provided to the guide bar.

First claim

What is claimed is:

1 . A chainsaw, the chainsaw comprising:
a guide bar extending from a housing, wherein the guide bar comprises a track extending around a perimeter of the guide bar configured to receive a chain; and a lubrication system comprising a reservoir at which a lubricant is contained, wherein the reservoir is releasably attachable to a machine drive device, the machine drive device comprising a body at which a pump apparatus is positioned, wherein the machine drive device forms an inlet opening in fluid communication with the reservoir, and wherein the machine drive device forms an outlet opening at which a conduit is fluidly coupled to receive the lubricant, the conduit forming a conduit outlet through which the lubricant is provided to the guide bar.

2 . The chainsaw of claim 1 , wherein the lubricant is a wax lubricant or a grease lubricant.

3 . The chainsaw of claim 1 , the chainsaw comprising:
a motor operably coupled to the chain to drive the chain at the guide bar.

4 . The chainsaw of claim 3 , the chainsaw comprising:
a drive system operably coupled to the machine drive device to actuate the pump apparatus.

5 . The chainsaw of claim 4 , wherein the drive system comprises a second motor operably coupled to the machine drive device to actuate the pump apparatus.

6 . The chainsaw of claim 4 , wherein the drive system comprises a gear system operably coupled to the motor to transmit power to the machine drive device to actuate the pump apparatus.

7 . The chainsaw of claim 1 , wherein the reservoir extends from the machine drive device perpendicular or oblique to a longitudinal extension of the guide bar.

8 . The chainsaw of claim 1 , wherein the reservoir comprises an attachment interface at an open end, the attachment interface forming a threaded interface releasably attachable to a corresponding attachment surface at the machine drive device.

9 . The chainsaw of claim 1 , the chainsaw comprising:
a reservoir housing surrounding the reservoir; and a fitting at which the reservoir housing is attachable, wherein the fitting and housing together form a locking interface configured to selectively secure the reservoir housing to the fitting.

10 . The chainsaw of claim 9 , wherein the locking interface forms a twist lock, a bayonet fitting, a threaded interface, a tapered fitting, a grease fitting, or a quick-disconnect fitting.

11 . The chainsaw of claim 9 , wherein the fitting is coupled to the body of the machine drive device.

12 . The chainsaw of claim 1 , wherein the reservoir comprises a compliant material allowing the reservoir to compress.

13 . The chainsaw of claim 1 , wherein the reservoir comprises a polyethylene material.

14 . The chainsaw of claim 1 , wherein the reservoir comprises a bellows configured to contract to reduce a volume within the reservoir.

15 . The chainsaw of claim 1 , the lubrication system comprising a transition body positioned between a neck extending from the body and the reservoir, the transition body comprising a groove configured to receive a retaining ring, the neck comprising an attachment surface configured to receive the retaining ring, wherein the retaining ring is configured to position into the groove and the attachment surface to couple the transition body to the neck.

16 . A lubrication system, the lubrication system comprising:
a machine drive device comprising a body at which a pump apparatus is positioned, wherein the machine drive device forms an inlet opening configured to be in fluid communication with a releasably attachable reservoir in which a lubricant is contained, and wherein the machine drive device forms an outlet opening at which a conduit is fluidly coupled to receive the lubricant to flow through a conduit outlet.

17 . The lubrication system of claim 16 , wherein the lubricant is a wax lubricant or a grease lubricant.

18 . The lubrication system of claim 16 , wherein the reservoir comprises a compliant material allowing the reservoir to compress.

19 . The lubrication system of claim 16 , the chainsaw comprising:
a drive system operably coupled to the machine drive device to actuate the pump apparatus.

20 . The lubrication system of claim 19 , wherein the drive system comprises a gear system operably coupled to a motor to transmit power to the machine drive device to actuate the pump apparatus.

Assignees

• Techtronic Cordless Gp

Inventors

• Holman Christopher
• Hoffman Ronald
• Eckard Lance

Classifications

• B27B17/12 Primary

  Lubricating devices specially designed for chain saws · CPC title

• B27B17/02

  Chain saws equipped with guide bar (B27B17/06 takes precedence) · CPC title

• A01G3/086

  Chain saws · CPC title

• F16N7/38

  with a separate pump; Central lubrication systems · CPC title

• F16N11/00

  Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricated; Grease cups · CPC title