Multi-layer coating for plunger and/or packing sleeve
US10941766B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2019 |
| Grant date | Mar 9, 2021 |
| Priority date | — |
| Expiry date | Jun 10, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pump fluid end comprising: a reciprocating element disposed within a reciprocating element bore and having an outer surface; a reciprocating element packing positioned within the reciprocating element bore; and optionally a sleeve positioned within the reciprocating element bore and having an inner surface proximate the outer surface of the reciprocating element, wherein at least a portion of the outer surface of the reciprocating element and/or the inner surface of the sleeve is coated with a multi-layer surface coating comprising a plurality of layers including: a first layer in contact with the at least a portion of the outer surface of the reciprocating element and/or the inner surface of the sleeve; and a second layer disposed over at least a portion of the first layer; and wherein at least one of the plurality of layers has a different visual appearance and/or material composition than another of the plurality of layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.