US 12,083,614 B2
Method and apparatus for refurbishing an oscillating multi-tool blade
Nicklas Gustafsson, Upplands Väsby (SE); and Richard Sundgren, Knivsta (SE)
Assigned to SWEALAND HUS & FASADTEKNIK AB, Upplands Väsby (SE)
Appl. No. 18/003,201
Filed by SWEALAND HUS & FASADTEKNIK AB, Upplands Väsby (SE)
PCT Filed Jun. 28, 2021, PCT No. PCT/SE2021/050640
§ 371(c)(1), (2) Date Dec. 23, 2022,
PCT Pub. No. WO2022/015215, PCT Pub. Date Jan. 20, 2022.
Claims priority of application No. 2050896-6 (SE), filed on Jul. 15, 2020.
Prior Publication US 2023/0249270 A1, Aug. 10, 2023
Int. Cl. B23D 65/02 (2006.01); B23D 63/00 (2006.01); B23D 63/04 (2006.01)
CPC B23D 65/02 (2013.01) [B23D 63/003 (2013.01); B23D 63/005 (2013.01); B23D 63/04 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A cutting apparatus (100) for refurbishing an oscillating multi-tool blade (10) having a serrated forward end, the cutting apparatus (100) comprising:
a clamping mechanism (70) including a clamping member (76) and a support member (60) for clamping the blade (10) therebetween;
cutting tooling (20, 40) for cutting a new serrated end of the blade (10) by cutting away an edge portion of the serrated forward end; and
a mechanism (110) for moving the clamping member (76) and the support member (60) and the blade (10) clamped therebetween across a cutting direction so far as tips of blade teeth (12) of the new serrated end will be cut away during a following renewed cut,
said mechanism (110) comprising an eccentric end portion (112) of a shaft (113) journaled to a support structure (102) and rotated by a handle (114) to either one of two predetermined end portions defined by two releasable locking pins (118), wherein
by cutting away the edge portion in two steps and moving the blade (10) laterally between the steps, where the blade (10) is clamped during this movement, tips of teeth resulting from the renewed cut will be very sharp as these are then not shaped by inevitably rounded tips of the cutting tooling (20, 40) but shaped in two occasions by intersecting straight edges of the cutting tooling (20, 40).