Saw chain sharpener
AssigneeAndreas Stihl AG & Co. KG
InventorsHans Dolata, Werner Meyle, Wilfried Linke, Hermann Hagele, Ernst Buck
Life of this patent
Estimating the term…
Abstract
This disclosure is directed to a saw chain sharpener for a motor-driven chain saw having a guide bar assembly that includes a guide bar and a saw chain guidingly mounted thereon. The saw chain sharpener includes an elongated chain guard casing for removably receiving the guide bar assembly therein. The chain guard casing defines a cavity in the forward end thereof adjacent the nose of the guide bar. A sharpening device is mounted in the cavity for sharpening the saw chain whereby the device is contained within the casing.
Claims20
A saw chain sharpener for a motor-driven chain saw having a motor housing and a guide bar assembly that includes a guide bar having an exposed portion extending outwardly from the housing and a saw chain guidingly mounted thereon for movement thereabout, the saw chain sharpener comprising:
- an elongated chain guard casing for removably receiving and enclosing the guide bar assembly therein over substantially the entire exposed portion of the guide bar;
- said chain guard casing having side walls facing toward respective flat surfaces of the guide bar and defining a cavity in the forward end of said casing adjacent the nose of the guide bar;
- and
- a sharpening device mounted in said cavity for sharpening the saw chain whereby said device is contained within said casing, said sharpening device including:
- a slider slidably mounted on one of said side walls for sliding movement in said cavity;
- an arcuate sharpening unit rigidly mounted on said slider;
- adjustment means for manually adjusting the position of said slider so as to move said sharpening unit into contact engagement with the saw chain as the latter moves about the nose of the guide bar;
- and,
- guide means formed in said one side wall for slidably engaging said slider at opposite ends thereof so as to prevent rotational movement of said slider and said arcuate sharpening unit relative to the guide bar as said sharpening unit comes into contact engagement with the saw chain.
A saw chain sharpener for a motor-driven chain saw having a guide bar assembly that includes a guide bar and a saw chain guidingly mounted thereon for movement thereabout, the saw chain sharpener comprising:
- an elongated chain guard casing for removably receiving the guide bar assembly therein;
- said chain guard casing defining a cavity in the forward end thereof adjacent the nose of the guide bar;
- and,
- a sharpening device mounted in said cavity for sharpening the saw chain whereby said device is contained within said casing, the sharpening device including:
- a slider slidably mounted in said cavity;
- an arcuate sharpening unit mounted on said slider;
- adjustment means for manually adjusting the position of said slider so as to move said sharpening unit into contact engagement with the saw chain as the latter moves about the nose of the guide bar, and,
- guiding means for slidably guiding said slider in said casing in the direction of the longitudinal axis of the guide bar assembly;
- and,
- said casing having two mutually adjacent side walls disposed on respective sides of the guide bar;
- and, said parallel guiding means comprising:
- at least two mutually parallel tracks formed in one of said side walls;
- and, first engagement means formed on said slider for slidably engaging one of said tracks and second engagement means formed on said slider for engaging the other one of said tracks.
A saw chain sharpener for a motor-driven chain saw having a guide bar assembly that includes a guide bar and a saw chain guidingly mounted thereon for movement thereabout, the saw chain sharpener comprising:
- an elongated chain guard casing for removably receiving the guide bar assembly therein;
- said chain guard casing defining a cavity in the forward end thereof adjacent the nose of the guide bar;
- and,
- a sharpening device mounted in said cavity for sharpening the saw chain whereby said device is contained within said casing, the sharpening device including:
- a slider slidably mounted in said cavity;
- an arcuate sharpening unit mounted on said slider;
- adjustment means for manually adjusting the position of said slider so as to move said sharpening unit into contact engagement with the saw chain as the latter moves about the nose of the guide bar, and,
- said chain guard casing including two side walls disposed on respective flat sides of the guide bar assembly and a peripheral edge wall connecting said side walls, said peripheral edge wall including a wall segment defining the forward end wall of said casing;
- and, said adjustment means including an adjustable screw rotatably mounted in said forward end wall and threadably engaging said slider for displacing the latter in the direction of the longitudinal axis of the guide bar assembly.
A saw chain sharpener for a motor-driven chain saw having a guide bar assembly that includes a guide bar and a saw chain guidingly mounted thereon for movement thereabout, the saw chain sharpener comprising:
- an elongated chain guard casing for removably receiving the guide bar assembly therein;
- said chain guard casing defining a cavity in the forward end thereof adjacent the nose of the guide bar;
- and,
- a sharpening device mounted in said cavity for sharpening the saw chain whereby said device is contained within said casing, said sharpening device including:
- a slider slidably mounted in said cavity;
- an arcuate sharpening unit mounted on said slider;
- adjustment means for manually adjusting the position of said slider so as to move said sharpening unit into contact engagement with the saw chain as the latter moves about the nose of the guide bar, and
- said casing having two mutually adjacent side walls disposed on respective sides of the guide bar;
- said casing having a viewing window formed in one of said side walls in the region of said cavity so as to permit viewing of said arcuate sharpening unit.
A saw chain sharpener for a motor-driven chain saw having a guide bar assembly that includes a guide bar and a saw chain guidingly mounted thereon for movement thereabout, the saw chain sharpener comprising:
- an elongated chain guard clam-shell casing for removably receiving the guide bar assembly therein;
- said clam-shell casing defining a cavity in the forward end thereof adjacent the nose of the guide bar;
- and,
- a sharpening device disposed in said cavity for sharpening the saw chain whereby said device is contained within said casing;
- said clam-shell casing including two half shells conjointly defining said casing and conjointly defining a partition plane therebetween;
- said half shells each having mutually parallel side walls disposed adjacent respective flat sides of the guide bar when said casing is in the closed position and mounted thereon;
- said partition plane being substantially coincident with a central plane passing between said side walls;
- and,
- said sharpening device including:
- a slider slidably mounted in one of said half shells;
- an arcuate sharpening unit mounted on said slider;
- guiding means arranged on said slider and in said one half shell for slidably guiding said slider in said casing in the direction of the longitudinal axis of the guide bar;
- and, an adjustable screw rotatably mounted in said one half shell and threadably engaging said slider for displacing the latter in the direction of said longitudinal axis.
A chain guard casing for a motor-driven chain saw having a motor housing and a guide bar assembly that includes a guide bar having an exposed portion extending outwardly from the motor housing and a saw chain guidingly mounted thereon for movement thereabout, the chain guard casing comprising:
- two half shells conjointly defining the casing in the form of a clam-shell housing for removably receiving and enclosing the guide bar assembly therein over substantially the entire exposed length of the guide bar;
- and,
- fixing means for fixing the position of said half shells with respect to said guide bar when mounted thereon so as to provide sufficient clearance between said casing and the saw chain whereby damage to the casing and the saw chain is prevented in the event the chain saw is actuated while the casing is still mounted on the guide bar assembly.
A chain guard casing for a motor-driven chain saw having a guide bar assembly that includes a guide bar with aperture means formed therein and a saw chain guidingly mounted thereon for movement thereabout, the chain guard casing comprising:
- two half shells conjointly defining the casing in the form of a clam-shell housing for removably receiving the guide bar assembly therebetween;
- fixing means for fixing the position of said half shells with respect to said guide bar when mounted thereon so as to provide sufficient clearance between said casing and the saw chain whereby damage to the casing and the saw chain is prevented in the event the chain saw is actuated while the casing is still mounted on the guide bar assembly;
- said fixing means including:
- fixing bore means formed in one of said half shells;
- and, fixing projection means formed on the other one of said half shells for penetrating said aperture means and engaging said bore means when said casing is closed and mounted on the guide bar thereby fixing the position of said casing with respect to the guide bar;
- and,
- said elongated clam-shell casing being a flat body having a narrow longitudinally extending top wall and a narrow longitudinally extending bottom wall;
- hinge means formed on said bottom wall for hinge-connecting said half shells to each other;
- and,
- releasable latching means for latching said half shells to each other when said casing is in the closed position.
Dependencies are inferred from the claim text.