Saw blade with aperture

Claim 1

A thin plane saw blade for an oscillatory saw having at least a partial rotational action when in use for use in bone surgery, said saw blade having a distal end portion comprising: side faces parallel to a center plane of said blade; an outer edge located at the distal end portion of said blade; a row of teeth extending along a portion of said outer edge, the distance between said outer edge and the distal edge of the teeth defining a tooth height; at least one closed aperture which extends in the direction away from the row of teeth, the portion of the blade between the aperture and the row of teeth comprising a strip-like element, the distance between said aperture and said outer edge being uniform along the entire length of the strip and defining a strip height, said strip height being at most twice the tooth height; said saw blade aperture being of a form which is symmetrical with respect to a median plane arranged perpendicularly to said center plane, passing through the middle of the row of teeth and bisecting said aperture, the saw blade and its teeth being made of a single piece of hardened steel plate of which the closed aperture arrangement was worked out of the already hardened steel plate.