US 5,143,131 A · Selectable spray pattern chain saw bar system

Abstract

A fluid spraying saw bar, and a chain sawing apparatus, such as a tree harvester, having such a saw bar are provided for selectively applying a predetermined fluid pattern of urea on a tree stump during felling, and of paint on a log end during bucking. A bar member supports an endless saw chain and has an elongate chamber therein to receive pressurized fluid from a harvester reservoir. Plural fluid emitting holes extend from the chamber to at least one side surface of the bar member. A tubular or a dual valve plate flow controller is slidably received in the chamber operatively engaged by a harvester actuator to control flow through the fluid emitting holes. For a rot-preventing urea spray, the pattern is adjusted for logs of varying diameter. For a marking spray, a striping spray pattern is selected in response to a harvester computer generated signal to indicate log length, diameter, mill designators, and the like. A method is also provided of selectively and controllably providing a predetermined spray pattern of fluid on a surface formed by the cutting action of the chain saw during cutting.

Claims51

Dependent claims

A fluid spraying saw bar, comprising:

a bar member having an attachment end for attachment to a chain saw, a peripheral edge including guide means for guiding an endless cutting chain about a portion of the peripheral edge, two opposing outer surfaces, an elongate chamber for receiving a fluid, and plural fluid emitting holes extending from the chamber to at least one of the outer surfaces;
and
a flow controller shiftably received in the bar member chamber to selectively control fluid flow through the fluid emitting holes to provide a predetermined spray pattern of fluid from the saw bar.

A fluid spraying saw bar for spraying a fluid when mounted on a chain sawing apparatus having a frame, attachment means for attaching the saw bar to the frame, an endless cutting chain mounted on the saw bar, drive means for driving the cutting chain, and a fluid reservoir, the saw bar comprising:

a bar member having an attachment end for attachment to the frame, a peripheral edge including guide means for guiding the endless cutting chain about at least a portion of the peripheral edge, two opposing outer surfaces, an elongate chamber for receiving a fluid from the fluid reservoir, and plural fluid emitting holes extending from the chamber to at least one of the outer surfaces;
and
a flow controller shiftable received in the bar member chamber to control fluid flow through the fluid emitting holes to provide a predetermined spray pattern of fluid from the saw bar when mounted on the chain sawing apparatus.

A fluid spraying chain sawing assembly, comprising:

a frame having a reservoir for storing a fluid;
a saw bar detachably mounted to the frame, the saw bar having a bar member with a peripheral edge including guide means for guiding an endless cutting chain about at least a portion of the peripheral edge, the bar member also having two opposing outer surfaces, an elongate chamber receiving the fluid from the fluid reservoir, and plural fluid emitting holes extending from the chamber to at least one of the outer surfaces;
an endless cutting chain mounted on the saw bar;
drive means for driving the cutting chain;
and
the saw bar also having a flow controller shiftably received in the bar member chamber for controlling fluid flow through the fluid emitting holes to provide a predetermined spray pattern of fluid from the saw bar.

3 more elements

A method of selectably spraying a predetermined fluid spray pattern on a surface being formed by cutting of a member, comprising the steps of:

cutting a member with an endless cutting chain driven about and supported by a saw bar having two opposing side surfaces, the saw bar also having a fluid receiving chamber and plural fluid emitting holes extending from the chamber to at least one of the outer surfaces, and the saw bar also having a flow controller for controlling fluid flow from the chamber through selected ones of said holes to at least one of the side surfaces of the saw bar;
supplying a fluid to the chamber of the saw bar;
and
operating the saw bar flow controller to provide the predetermined fluid spray pattern through said selected holes during the cutting step.

1 more element

Dependencies are inferred from the claim text.

Selectable spray pattern chain saw bar system

Life of this patent

Selectable spray pattern chain saw bar system

Life of this patent

Abstract

Claims51