Valve stem packing assembly

Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

251312, 277124, 277106, 277215, 267158, 411544, F21K 344

Patent

active

045387907

ABSTRACT:
A valve body has a stem passage rotatably receiving a valve stem. A packing surrounds the stem in the passage and a packing nut threaded on the stem applies axial force to radially expand the packing into sealing engagement with the stem and passage wall. Controlled slippage components interposed between the packing and packing nut allow rotation of the stem and packing nut without any rotational sliding movement against an end face of the packing. A packing support ring engages the end face of the packing adjacent the packing nut and includes a chevron surface for radially expanding the packing. A gland engages the support ring and a pair of reversely positioned spring washers are interposed between the gland and packing nut. During rotation of the stem, packing nut and spring washers, the gland rotates against the packing support ring. The chevron surface of the support ring includes notches for gripping the packing to prevent relative sliding movement therebetween. A handle is attached to the stem by a handle nut, and a spring washer interposed between the handle and handle nut prevents loosening of the handle nut.

REFERENCES:
patent: 1795570 (1931-03-01), Nilson
patent: 2110098 (1938-03-01), Strecker
patent: 2194265 (1940-03-01), Abercrombie
patent: 2713482 (1955-07-01), Stapleton
patent: 2912266 (1959-10-01), Nordell
patent: 3039780 (1962-06-01), Nordell
patent: 3108018 (1963-10-01), Lewis
patent: 3164362 (1965-01-01), Lavigueur
patent: 3168279 (1965-02-01), Anderson et al.
patent: 3214182 (1965-10-01), Herbruggeh
patent: 3239191 (1966-03-01), Widera
patent: 3387815 (1968-06-01), Richards
patent: 3567178 (1971-03-01), Nelson
patent: 3586289 (1971-06-01), Priese
patent: 3717323 (1973-02-01), Geipel
patent: 3883112 (1975-05-01), Milleville et al.
patent: 4006881 (1977-02-01), Gaillard
patent: 4364542 (1982-12-01), Meyer
patent: 4379557 (1983-04-01), Saka

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Valve stem packing assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Valve stem packing assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve stem packing assembly will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-609748

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.