Liveload assembly
US5709514A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 1996 |
| Grant date | Jan 20, 1998 |
| Priority date | — |
| Expiry date | May 30, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K41/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A liveload assembly for communicating a load to packing material through a flange member of a fluid flow apparatus while pre-stressing a stud holding the flange member with a different loading, in which a first set of compressible belleville washers are received on an open-ended sleeve of a stack guide and rest on a seat defined by a flange at one end of the sleeve, the stack guide and washers received into a recess of a retainer cup having a partially closed end which defines a threaded bore for threadingly engaging the retainer cup to a stud extending from the stuffing box and freely through a gland follower, whereby the first set of belleville washers, being compressed, communicate a load through the flange member to the packing material. A second set of belleville washers are received on the stud and rest on a beveled face of the retainer cap. A nut screwed onto the stud compresses the second set of belleville washers against the beveled face of the retainer cup for pre-stressing the stud. A method of maintaining a compressive force communicated through the flange member to the sealing material in a fluid flow apparatus while pre-stressing the stud is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.