Injector piston with improved seal
US11774040B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 7, 2020 |
| Grant date | Oct 3, 2023 |
| Priority date | — |
| Expiry date | Dec 26, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16N27/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A piston assembly is for a fluid delivery device, preferably a lubricant injector, the injector having a measuring chamber defined by an inner cylindrical surface and an axial end face, a flow port through the end face, and a central axis extending through the chamber. The piston assembly includes a piston body disposeable within the chamber so as to be linearly displaceable along the central axis. The piston body includes a cylindrical head, the head having first and second axial ends and an outer circumferential surface, and a rod extending axially from the second axial end of the piston head. A seal is coupled with the first axial end of the piston head and has an annular lip sealingly engageable with the chamber inner cylindrical surface and an axial end engageable with the chamber end face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.