CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to and the benefit of US Provisional Patent

Application No. 62/887,895, Filed 16 August 2019, the contents of which are hereby incorporated by reference in their entirety.

BACKGROUND

[0002] This is related in general to band saws. Generally, band saws are used to cut curves or other irregular shapes, and are often used for thicker or larger pieces of lumber as compared to that of other saws.

[0003] Band saws typically include a relatively flat planar band saw blade with a plurality of teeth disposed on a blade backer. Different band saw blades include differing teeth geometry depending upon design. For example, a band saw blade may include multiple saw teeth including straight teeth, right-set teeth and/or left-set teeth, and may also include one or more gullet portions provided therebetween the saw teeth. Each tooth may be finished with a particular rake angle and one or more relief surfaces.

SUMMARY

[0004] This relates more particularly to a band saw blade including a generally planar blade backer having generally parallel right and left sides opposite each other, and including a plurality of consecutive sets of teeth disposed on the top edge of the blade backer.

[0005] In at least one embodiment, a band saw blade includes a generally planar blade backer having generally parallel right and left sides opposite each other. The band saw includes a plurality of consecutive sets of teeth disposed on a top edge of the blade backer. Each set includes a first straight tooth, a second set tooth, following the first straight tooth and being one of left-set or right-set, a third set tooth, following the second set tooth and being the other of left- set or right set, a fourth set tooth, following the third set tooth and being set in the same direction as the second set tooth, and a fifth set tooth, following the fourth set tooth and being set in the same direction as the third set tooth.

[0006] In at least one embodiment, the tip-to-tip distance between the fourth set tooth of one set and the second set tooth of the next set is between 0.70 times and 1.30 times the tip-to-tip distance between the second set tooth and the fourth set tooth in the one set. Further, the tip-to- tip distance between the fourth set tooth of one set and the second set tooth of the next set may be between 0.75 times and 1.25 times the tip-to-tip distance between the second set tooth and the fourth set tooth in the one set. Additionally, the tip-to-tip distance between the fourth set tooth of one set and the second set tooth of the next set may be between 1.00 times and 1.25 times the tip-to-tip distance between the second set tooth and the fourth set tooth in the one set.

[0007] In at least one embodiment, the tip-to-tip distance between the fifth set tooth of one set and the third set tooth of the next set is between 0.70 times and 1.30 times the tip-to-tip distance between the third set tooth and the fifth set tooth in the one set. Further the tip-to-tip distance between the fifth set tooth of one set and the third set tooth of the next set may be between 0.75 times and 1.25 times the tip-to-tip distance between the third set tooth and the fifth set tooth in the one set. Additionally, the tip-to-tip distance between the fifth set tooth of one set and the third set tooth of the next set may be between 1.00 times and 1.25 times the tip-to-tip distance between the third set tooth and the fifth set tooth in the one set.

[0008] In at least one embodiment, each teeth set includes a first gullet formed in the top edge of the blade backer and disposed between the first straight tooth and the second set tooth, a second gullet formed in the top edge of the blade backer and disposed between the second set tooth and the third set tooth, and a third gullet formed in the top edge of the blade backer and disposed between the third set tooth and the fourth set tooth. The third gullet has a greater gullet depth than the first gullet and the second gullet. Further, the depth of the second gullet may be greater than the depth of the first gullet. [0009] In at least one embodiment, the second set tooth and the fourth set tooth are left set and the third set tooth and the fifth set tooth are right set. It may be that second set tooth and the fourth set tooth are right set and the third set tooth and the fifth set tooth are left set.

[0010] In at least one embodiment, each tooth has a first relief surface and a second relief surface meeting at an angle.

[0011] In at least one embodiment, the second set tooth and the fourth set tooth are equally set. Additionally or alternatively, the third set tooth and the fifth set tooth may be equally set.

[0012] It must be understood that various additional embodiments include the combination of one or more of the embodiments above with each of one or more of the others.

[0013] Various aspects will become apparent to those skilled in the art from the following detailed descriptions and the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] There is illustrated in the various figures several views of various embodiments of a band saw.

[0015] FIG. 1 is a left side schematic view of a portion of band saw blade with a plurality of teeth sets according to an embodiment.

[0016] FIG. 2 is a rear left perspective view of the portion of the band saw blade of Fig.

1.

[0017] FIG. 3 is a left side view of the portion of the band saw blade of Fig. 1.

[0018] FIG. 4 is a front left perspective view of the portion of the band saw blade of Fig.

1.

[0019] FIG. 5 is a front right perspective view of the portion of the band saw blade of

Fig. 1. [0020] FIG. 6 is a left side schematic view similar to Fig. 1 of a portion of band saw blade with a plurality of teeth sets according to an other embodiment.

[0021] FIG. 7 is an enlarged portion of Fig. 6 taken at circle 7-7.

DETAILED DESCRIPTION

[0022] Note, the further embodiment shown in Fig. 7 is labeled with similar identifiers, except 100 greater, as to the embodiment to Figs. 1-6, and should be understood to be similar except as noted otherwise.

[0023] Referring to the drawings, a band saw blade 110 includes a generally planar blade backer 112 having generally parallel right and left sides 114 and 116 opposite each other. A plurality of consecutive sets of teeth 118 and 120 are disposed on a top edge 122 of the blade backer 112. , Each set 118 and 120 include a first straight tooth 124, a second set tooth 126, following the first straight tooth 124 and being one of left-set or right-set (shown left set), a third set tooth 128, following the second set tooth 126 and being the other of left-set or right set, a fourth set tooth 130, following the third set tooth 128 and being set in the same direction as the second set tooth 126; and a fifth set tooth 132, following the fourth set tooth 130 and being set in the same direction as the third set tooth 128.

[0024] The tip-to-tip distance 134 between the fourth set tooth 130 of one set 118 and the second set tooth 126 of the next set 120 is between 0.70 times and 1.30 times the tip-to-tip distance 136 between the second set tooth 126 and the fourth set tooth 130 in the one set 118.

[0025] Further, the tip-to-tip distance 134 between the fourth set tooth 130 of one set 118 and the second set tooth 126 of the next set 120 is preferably between 0.75 times and 1.25 times the tip-to-tip distance 136 between the second set tooth 126 and the fourth set tooth 130 in the one set 118.

[0026] Most preferably, the tip-to-tip distance 134 between the fourth set tooth 130 of one set 118 and the second set tooth 126 of the next set 120 is between 1.00 times and 1.25 times the tip-to-tip distance 136 between the second set tooth 126 and the fourth set tooth 130 in the one set 118.

[0027] The tip-to-tip distance 138 between the fifth set tooth 132 of one set 118 and the third set tooth 128 of the next set 120 is between 0.70 times and 1.30 times the tip-to-tip distance 140 between the third set tooth 128 and the fifth set tooth 132 in the one set 118.

[0028] Further, the tip-to-tip distance 138 between the fifth set tooth 132 of one set 118 and the third set tooth 128 of the next set 120 is preferably between 0.75 times and 1.25 times the tip-to-tip distance 140 between the third set tooth 128 and the fifth set tooth 132 in the one set 118.

[0029] Most preferably, the tip-to-tip distance 138 between the fifth set tooth 132 of one set 118 and the third set tooth 128 of the next set 120 is between 1.00 times and 1.25 times the tip-to-tip distance 140 between the third set tooth 128 and the fifth set tooth 132 in the one set 118.

[0030] Each set 118 and 120 includes a first gullet 142 formed in the top edge 122 of the blade backer 112 and disposed between the first straight tooth 124 and the second set tooth 126, a second gullet 144 formed in the top edge 122 of the blade backer 112 and disposed between the second set tooth 126 and the third set tooth 128, a third gullet 146 formed in the top edge 122 of the blade backer 112 and disposed between the third set tooth 128 and the fourth set tooth 130, a fourth gullet 148 formed in the top edge 122 of the blade backer 112 and disposed between the fourth set tooth 130 and the fifth set tooth 132, a fifth gullet 150 formed in the top edge 122 of the blade backer 112 and disposed between the fifth set tooth 132 and the first straight tooth 124 of the next set.

[0031] Preferably the third gullet 146 has a greater gullet depth than the first gullet 142 and the second gullet 144. Additionally or alternatively the third gullet 246 may have a greater length than the first gullet 142 or second gullet 144.

[0032] Further, the second gullet 144 preferably has a greater depth than the depth of the first gullet 142, although such is not required. [0033] In the illustrated embodiments the second set tooth 126 and the fourth set tooth

130 are left set and the third set tooth 128 and the fifth set tooth 132 are right set. However, it must be understood that the second set tooth 126 and the fourth set tooth 130 may be right set and the third set tooth 128 and the fifth set tooth 132may be left set.

[0034] Preferably, the second set tooth 126 and the fourth set tooth 130 are equally set. It is also preferred that the third set tooth 128 and the fifth set tooth 132 are equally set.

[0035] As best shown in Fig. 7, each tooth has a first relief surface RF1 and a second relief surface RF2 meeting at an angle. Each tooth has a gullet depth GD and rake angle RA.

[0036] While principles and modes of operation have been explained and illustrated with regard to particular embodiments, it must be understood, however, that this may be practiced otherwise than as specifically explained and illustrated without departing from its spirit or scope.