US 12,275,117 B2
Attachment hub, backup pad, and abrasive disc
Paul Larking, Staffordshire (GB); and Andrew Robert Henry, Berkshire (GB)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Appl. No. 17/415,804
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Dec. 19, 2019, PCT No. PCT/IB2019/061099
§ 371(c)(1), (2) Date Jun. 18, 2021,
PCT Pub. No. WO2020/128950, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 18214653 (EP), filed on Dec. 20, 2018.
Prior Publication US 2022/0040813 A1, Feb. 10, 2022
Int. Cl. B24B 45/00 (2006.01); B24D 9/08 (2006.01); B24D 13/20 (2006.01)
CPC B24B 45/006 (2013.01) [B24D 9/08 (2013.01); B24D 13/20 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An attachment hub for attachment to a sander, comprising a quick-release attachment assembly configured for releasable and aligned engagement with a counterpart of a backup pad particularly for an abrasive disc, wherein the quick-release attachment assembly comprises at least one spring member comprising an engagement portion configured for engagement with the counterpart, the at least one spring member extends in a radial direction from a radially inner portion to a radially outer portion and having the engagement portion arranged at the radially outer portion; wherein the at least one spring member comprises a straight section oriented radially within a space of a frame, the engagement portion being formed at the radially outer end section of the straight section, and the straight section being connected to one or more truss elements of the frame, wherein the straight section is connected to the frame by a plurality of biasing elements that bias the engagement portion towards an engaged position.