Device for sharpening chain saw teeth
OwnerDrago Cendakinventor
Life of this patent
Estimating the term…
Abstract
A device for sharpening chain saw teeth, in particular a chain saw which is portable and applicable in the field, and where the chain is not to be taken off the chain saw blade when sharpened enables swinging of a grinding wheel (16) transversally to each tooth (8) of a chain (7) resulting in straight cutting faces of each tooth (8). The grinding wheel (16) of the relatively small diameter is rotated by an actuator (15) of the suitably small power and high number of the revolutions resulting in high cutting speed. Said actuator (15) can be either an electric motor, supplied with electricity from electric mains or a battery, a pneumatic motor or a hydraulic motor.
Claims9
Device for sharpening chain saw teeth, in particular a chain saw which is portable and applicable in field, and where the chain is not to be taken off the chain saw blade when sharpened, characterized in that a spatial curved carrier (12) is fixed, by means of a fastening means (11), to the upper end of one of arms (2, 3) originating in a body (1), so that said carrier (12) can be optionally shifted on the circular arch along said fastening means (11), said body is provided on the lower side and over the entire length thereof with a groove (5) which penetrates the body (1) in the area between said arms (2, 3) and is connected to a gap (4), the free end of the carrier (12) is connected by means of a mounting (13) to a swivel arm (14) which lies essentially in a plane being predominantly parallel to the plane of the carrier (12), an actuator (15) with a grinding wheel (16) is associated to the free end of the swivel arm (14), that the first, left half (25) of the body (1) is formed with a click bulge (27) on the outside i.e. on the side facing away from a chain blade (6), said click bulge intended for cooperation with a click spring guard (28), an adapter (29) is associated to the inside of the left half (25) of the body (1), said adapter reaching the chain (7) area with an inwardly bent flange (30) provided at the free end thereof, that a flexible adapter (31) is associated to the inside of the right half (26) of the body (1), said adapter reaching the chain (7) area with an inwardly bent flange (32) provided at the free end thereof, that the left half (25) comprises a distance bolt (33) with which the adapter (29) is moved closer to or away from, and that two distance screws (34) extend through the right half (26) and through the flexible adapter (31), that the right half (26) of the body (1) is formed with a recess (35) in the upper part thereof and in the area between the arms (2, 3) of the body (1), a correspondingly formed pressure member (37) which can be swung about an adjusting screw (36) rests in said recess, an adjusting nut (36′) mates with said adjusting screw (36) by means of which is determined the sharpening depth in the horizontal direction, that the pressure member (37) comprises a pair of distance bolts (38) arranged practically rectangular to the saw blade (6), when the sharpening device is ready to operate, and at that time they are pressing against the flexible adapter (31) with the ends thereof, and that a click spring guard (28) is located on the pressure member (37) comprising a pair of shoulders (39, 40) arranged in a way that one of them holds a tooth (8) to be sharpened when the click spring guard (28) cooperates with the click bulge (27).
Device according to any of the preceeding claims, characterised in that the actuator (15) is either an electric, a pneumatic or a hydraulic motor.
Dependencies are inferred from the claim text.