The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 13, 2026
Filed:
Nov. 10, 2022
Hl Mando Corporation, Pyeongtaek-si, KR;
HL MANDO CORPORATION, Pyeongtaek-si, KR;
Abstract
The present invention relates drum brake system, comprising a back plate assembly and a brake drum () that is rotatable with respect to the back plate assembly, the back plate assembly comprising: a back plate (); two brake shoes ('), the two brake shoes (′) being pivotably connected to the back plate (), pivot axes (′) of the brake shoes (′) being disposed at or near first ends of the brake shoes (′); an actuator housing () with two pistons (′), the two pistons (′) being configured to move outwardly, to press each piston (′) against one of the brake shoes (′) to pivot the respective brake shoe (′) outwardly about its pivot axis (′), and to press the respective brake shoe (′) against the brake drum () for braking; a return spring () extending between the brake shoes (′) and being connected to both brake shoes (′), the return spring () being configured () to exert a retracting spring force that pulls both brake shoes (′) away from the brake drum; two tension springs (′) and a holder arrangement (), inner ends of each of the two tension springs (′) being connected to the holder arrangement (), an outer end of the first tension spring () of the two tension springs (′) being connected to a first brake shoe () of the two brake shoes (′) and an outer end of the second tension spring (′) of the two tension springs (′) being connected to a second brake shoe (′) of the two brake shoes (′).