US 11,926,070 B2
Targeted oil delivery for chain saw bars
Eric M. Burmester, Happy Valley, OR (US); Michael D. Harfst, Milwaukie, OR (US); Sam Hutsell, Portland, OR (US); Genesis McDermott, Redmond, WA (US); Patrick Sellars, Oregon City, OR (US); James Matthew Cunnington, Tualatin, OR (US); and Jonah Smith Sedaghaty, Camas, WA (US)
Assigned to Oregon Tool, Inc., Portland, OR (US)
Filed by Oregon Tool, Inc., Portland, OR (US)
Filed on Nov. 11, 2021, as Appl. No. 17/524,543.
Claims priority of provisional application 63/113,098, filed on Nov. 12, 2020.
Prior Publication US 2022/0143860 A1, May 12, 2022
Int. Cl. B27B 17/12 (2006.01); B27B 17/02 (2006.01)
CPC B27B 17/12 (2013.01) [B27B 17/02 (2013.01); B27B 17/025 (2013.01); Y10T 83/263 (2015.04)] 19 Claims
OG exemplary drawing
 
1. A bar for a chain saw, comprising:
an inner core defining a longitudinal axis, the inner core comprising a first side, a second side, and a perimeter edge separating the first side and the second side;
a first outer wall disposed on the first side;
a second outer wall disposed on a second side of the inner core, the second side opposite the first side; and
a first fluid channel formed along the longitudinal axis, the first fluid channel in fluid communication with a first fluid hole at a first end of the channel and a first fluid exit port formed at a second end of the channel distal from the first end; and
a second fluid channel formed along the longitudinal axis, the second fluid channel in fluid communication with a second fluid hole at a first end of the second fluid channel and a second fluid exit port formed at a second end of the second fluid channel
wherein:
the first outer wall and second outer wall extend beyond the perimeter edge of the inner core to form a bar groove;
the first fluid exit port is disposed at or near the perimeter edge and proximate to a cutting area of the bar groove;
the first fluid exit port comprises a valve; and
the second fluid exit port is disposed proximate to a nose of the bar.