B - Operations – Transporting – 27 – B
Patent
B - Operations, Transporting
27
B
143/11, 146/32
B27B 13/00 (2006.01)
Patent
CA 1259888
BAND SAW APPARATUS AND METHOD by GERALD R. HARRIS ABSTRACT Band saw apparatus (21) is disclosed. It includes: a drive assembly (22, 27, 28) formed for support and guided movement of a saw blade (29) for cutting of a workpiece (81); an endless band saw blade (29) mounted to the drive assembly; and, reciprocation apparatus (33, 34, 41) formed for reciprocation of the blade (29) toward and away away from the workpiece (81) to enable see-sawing of the blade (29) and variation of the force per unit area of the cutting edge (66) of the blade (29) on the workpiece (81) while maintaining the same total force on the blade (29). To enhance efficiency of cutting, the blade drive assembly is mounted to the remainder of the saw (21) to be substantially free to rebound or move away from the workpiece (813 during reciprocation to avoid digging in or shearing off of the blade teeth and to permit close spacing of the blade guides (33, 34) next to the workpiece (81). The saw (21) includes a control circuit (111, 154) for controlling the rate of movement of the saw arm (22) away from (36) and toward (37) the workpiece (81) to enable timing of saw arm (22) rebound to blade (29) displacement. The blade guides (33, 34) are reciprocated by the fluid piston-cylinder assemblies (41) in synchronism or out-of- phase to vary the amplitude, frequency, speed and dwell during displacement independently of blade (29) speed and at two locations along a length of the blade (29) so as to produce see-sawing oscillation as well as simple reciprocation. The blade guide assemblies (33, 34) are provided with displacement means (41) to permit guide assembly (33, 34) adjustment during cutting to maintain the guide assemblies (33, 34) in close proximity to the workpiece (81). Alternative blade displacement assembly constructions and a method for cutting workpieces employing the apparatus also are disclosed. The method includes variation of the feed rate of the saw blade (29) down through the workpiece (81) as a function of the width of the workpiece (81).
478870
Harris Gerald R.
Riches Mckenzie & Herbert Llp
LandOfFree
Band saw apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Band saw apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Band saw apparatus and method will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1233534