摘要:
A device in power saws of the type having a motor-supporting body (2) and a guide bar (4) connected thereto, comprising a guide device (5) cooperating with the guide bar and displaceable towards and away from the guide bar along at least one guide member (6,6'). The guide device (5) is connected to the guide member (6,6') only at one end and has its opposite end free so as to form a free space between the free ends (10,4') of the guide device and the guide bar, the guide member (6,6') being connected to the power saw only by the intermediary of the motor-supporting body (2).
摘要:
A guide roller is supported at the tip of the guide plate, over which the chain runs. A tip guard extends over the chain and projects forwardly from the support for the guide roller.
摘要:
Chain saw bar having at its free end a sprocket 20 which supports the saw chain and is rotatably mounted between two side plates (18, 19) in the saw bar on a tubular shaft (26) which is rigidly connected to the sprocket and is adapted to transfer rotation to a driven shaft inserted into the tubular shaft bearing means (24, 25) being arranged in both side plates rotatably supporting the tubular shaft. According to the invention the tubular shaft (26) is short enough to be inserted into a kerf sawed by a saw chain mounted on the saw bar.
摘要:
A chain saw having a saw chain and a chain bar, the saw chain comprising a plurality cutter links interconnected by connector links, the chain saw further having a sprocket or roller mounted for rotation in the plane of the bar adjacent the nose thereof, whereby the saw chain is guided around the nose of the chain bar, the sprocket or roller being shaped to receive driving tongues of the chain such that the cutter links of the chain are guided on a path of small radius than the path of movement of the connector links so that the depth of cut possible by the cutter links is reduced.
摘要:
A guide bar for a chain saw having a main body portion that is symmetrical so as to be invertible, i.e., to reverse the top and bottom edges, and including a nose portion having fixed top and bottom positions that is removably attached to the outer end of the main bar portion. Said nose portion is non-symmetrical with the upper quadrant of the nose sharply curved away from the top edge and the lower quadrant gradually curved back to the bottom edge. Whereas the main body portion can be inverted, the life of that portion of the bar is greatly increased.
摘要:
A chain saw guide bar is formed of two metal plates of uniform thickness and of like size and shape. Each of the plates has local areas displaced from the plane of the plate to form protuberances on the inner face of the plate and corresponding recesses in the outer face. The protuberances are spaced from one another both laterally and longitudinally of the plate and comprise rows of protuberances which are spaced inwardly from opposite side edges of the plates a distance slightly greater than the length of the tangs of a saw chain to be used on the guide bar. The two plates are superposed on one another with the protuberances of one plate engaging matching protuberances of the other plate. One of the protuberances of each pair of matching protuberances has an integral tubular projection extending through a hole in the matching protuberance and riveted over in the corresponding recess to unite the plates in a unitary structure. The plates thus united are spaced apart from one another by the protuberances except in the local areas of the protuberances. The spacing of at least the peripheral portions of the plates outside the rows of protuberances is slightly greater than the thickness of the tangs of the saw chain so as to accommodate the tangs between the peripheral portions of the plate with working clearance. The riveting of all of the projections is preferably effected simultaneously.
摘要:
A sprocket nose guide bar for guiding an endless saw chain. A configured sprocket is rotatably mounted in the nose of the bar and functions to elevate and transport the saw chain around the nose end. The teeth of the sprocket engage the drive links of the chain to lift the chain off the nose edge as the chain traverses the nose. The tooth tips project above the side link bearing surfaces and into configured notches whereby the teeth effectively provide the lifting action without entering the saw chain chassis.