Chainsaw and lubrication system for chainsaw guide bar

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 a neck extends from the body, the neck comprising an attachment surface,

wherein the reservoir fluidly communicates with a transition body extending between the neck and the reservoir, and wherein a retaining ring is received at the transition body and the attachment surface of the neck to retain the transition body to the neck, wherein the retaining ring is configured as a spring compressible into a groove of the transition body and expandable into the attachment surface of the neck to lock the transition body to the neck, and wherein the attachment surface of the neck forms a groove into which the retaining ring is expandable, and

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 , comprising:

a seal positioned at an end of the transition body at which the transition body is received at the body of the machine drive device at the attachment interface.