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Title: Collar nut and thrust ring

Abstract

A collar nut comprises a hollow cylinder having fine interior threads at one end for threadably engaging a pump mechanical seal assembly and an inwardly depending flange at the other end. The flange has an enlarged portion with a groove for receiving an O-ring for sealing against the intrusion of pumpage from the exterior. The enlarged portion engages a thrust ring about the pump shaft for crushing a hard O-ring, such as a graphite O-ring. The hard O-ring seals the interior of the mechanical seal assembly and pump housing against the loss of lubricants or leakage of pumpage. The fine threads of the hollow cylinder provide the mechanical advantage for crushing the hard O-ring evenly and easily with a hand tool from the side of the collar nut rather than by tightening a plurality of bolts from the end and streamlines the exterior surface of the mechanical seal. The collar nut avoids the spatial requirements of bolt heads at the end of a seal and associated bolt head turbulence.

Inventors:
 [1]
  1. Aiken, SC
Issue Date:
Research Org.:
E I DUPONT DE NEMOURS & CO INC
OSTI Identifier:
867934
Patent Number(s):
5039114
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16J - PISTONS {
DOE Contract Number:  
AC09-76SR00001
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
collar; nut; thrust; comprises; hollow; cylinder; fine; interior; threads; threadably; engaging; pump; mechanical; seal; assembly; inwardly; depending; flange; enlarged; portion; groove; receiving; o-ring; sealing; intrusion; pumpage; exterior; engages; shaft; crushing; hard; graphite; seals; housing; loss; lubricants; leakage; provide; advantage; easily; hand; tool; tightening; plurality; bolts; streamlines; surface; avoids; spatial; requirements; bolt; heads; associated; head; turbulence; mechanical advantage; hollow cylinder; pump shaft; seal assembly; exterior surface; o-ring seal; pump housing; mechanical seal; o-ring seals; enlarged portion; collar nut; threadably engaging; hand tool; /277/

Citation Formats

Lowery, Guy B. Collar nut and thrust ring. United States: N. p., 1991. Web.
Lowery, Guy B. Collar nut and thrust ring. United States.
Lowery, Guy B. Tue . "Collar nut and thrust ring". United States. https://www.osti.gov/servlets/purl/867934.
@article{osti_867934,
title = {Collar nut and thrust ring},
author = {Lowery, Guy B},
abstractNote = {A collar nut comprises a hollow cylinder having fine interior threads at one end for threadably engaging a pump mechanical seal assembly and an inwardly depending flange at the other end. The flange has an enlarged portion with a groove for receiving an O-ring for sealing against the intrusion of pumpage from the exterior. The enlarged portion engages a thrust ring about the pump shaft for crushing a hard O-ring, such as a graphite O-ring. The hard O-ring seals the interior of the mechanical seal assembly and pump housing against the loss of lubricants or leakage of pumpage. The fine threads of the hollow cylinder provide the mechanical advantage for crushing the hard O-ring evenly and easily with a hand tool from the side of the collar nut rather than by tightening a plurality of bolts from the end and streamlines the exterior surface of the mechanical seal. The collar nut avoids the spatial requirements of bolt heads at the end of a seal and associated bolt head turbulence.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}