All-polymer helical biasing member and pump dispenser incorporating same
US12364995B2 · kind B2 · utility
0Cited by
22References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 18, 2021 |
| Grant date | Jul 22, 2025 |
| Priority date | — |
| Expiry date | Jan 31, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1047
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A biasing member for use in reciprocating dispenser pumps is contemplated. The member is made completely of polymeric materials and is suitable as a direct replacement for metallic coil springs. The biasing member includes spiral shape defined by inner and outer helix traces, with a series of perforations provided along one or both of those traces. These perforations, in conjunction with thinned channels, the size and shape of holes, and the size and shape of apertures, all cooperate to allow for a spring with sufficient resilience and greater spring force in comparison conventional, all-polymer biasing members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.