Plunger pump
US6510781B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2001 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Jul 16, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/164
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An adjustable packing gland assembly is mounted for adjustable engagement with a seal and a packing in a fluid pumping apparatus for sealing against fluid leakage about reciprocating plungers and like pumping elements, the adjustable packing gland also stabilizes the pumping element. A stuffing box is formed in the pump housing and spaced packing gland shoulder bolts bottom out on that housing. A packing gland is disposed in the stuffing box and is slidably mounted on the spaced adjustment studs, each of the shoulder bolts having adjusting nuts and pipe sleeves disposed for precision adjustment of the packing gland. Bearing against the plunger on either side of the packing and seal are guiding elements made of a low wear material which possesses lubricity as against the plunger. The upper guide may be integrally formed with the gland. An eccentric liner is made of a similar material as the guides, rendering it a low wear item in need of little or no lubrication. A scraper may also be provided, below or remote from the seal, to protect the seal and packing from damaging materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.