US 12,435,746 B2
Bush retention system
David Clark, Eastbourne (GB)
Assigned to HMD Seal/Less Pumps Ltd., Eastbourne (GB)
Appl. No. 17/766,165
Filed by HMD Seal/Less Pumps Ltd., Eastbourne (GB)
PCT Filed Oct. 1, 2020, PCT No. PCT/GB2020/052406
§ 371(c)(1), (2) Date Apr. 1, 2022,
PCT Pub. No. WO2021/064404, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 1914171 (GB), filed on Oct. 1, 2019.
Prior Publication US 2022/0372974 A1, Nov. 24, 2022
Int. Cl. F16B 21/18 (2006.01)
CPC F16B 21/18 (2013.01) 15 Claims
OG exemplary drawing
 
1. A bushing system for use in a magnetic drive or canned motor pump, the system comprising:
a bush holder having an axial recess for receiving a bush,
a bush for insertion into the axial recess, the bush and bush holder each having:
one or more cooperating features which abut against each other when the bush is fitted into the recess; and
a retention member, wherein:
the bush holder comprises an annular recess for receiving at least part of the retention member;
the bush comprises an annular recess for receiving at least part of the retention member,
wherein, when the cooperating features abut, the retention member recesses on the bush holder and the bush are axially offset, wherein the retention member and the axially offset recesses combine to provide a biasing force which urges the bush and bush holder towards each other.