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Title: Locking apparatus for gate valves

Abstract

A locking apparatus for fluid operated valves having a piston connected to the valve actuator which moves in response to applied pressure within a cylinder housing having a cylinder head, a catch block is secured to the piston, and the cylinder head incorporates a catch pin. Pressure applied to the cylinder to open the valve moves the piston adjacent to the cylinder head where the catch pin automatically engages the catch block preventing futher movement of the piston or premature closure of the valve. Application of pressure to the cylinder to close the valve, retracts the catch pin, allowing the valve to close. Included are one or more selector valves, for selecting pressure application to other apparatus depending on the gate valve position, open or closed, protecting such apparatus from damage due to premature closing caused by pressure loss or operational error.

Inventors:
 [1];  [2]
  1. (Livermore, CA)
  2. (Manteca, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
866770
Patent Number(s):
4784037
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
locking; apparatus; gate; valves; fluid; operated; piston; connected; valve; actuator; moves; response; applied; pressure; cylinder; housing; head; catch; block; secured; incorporates; adjacent; automatically; engages; preventing; futher; movement; premature; closure; application; close; retracts; allowing; included; selector; selecting; depending; position; closed; protecting; damage; due; closing; caused; loss; operational; error; pressure applied; valve actuator; gate valve; cylinder head; operated valve; locking apparatus; damage due; valve position; gate valves; applied pressure; cylinder housing; /91/92/

Citation Formats

Fabyan, Joseph, and Williams, Carl W. Locking apparatus for gate valves. United States: N. p., 1988. Web.
Fabyan, Joseph, & Williams, Carl W. Locking apparatus for gate valves. United States.
Fabyan, Joseph, and Williams, Carl W. Fri . "Locking apparatus for gate valves". United States. https://www.osti.gov/servlets/purl/866770.
@article{osti_866770,
title = {Locking apparatus for gate valves},
author = {Fabyan, Joseph and Williams, Carl W.},
abstractNote = {A locking apparatus for fluid operated valves having a piston connected to the valve actuator which moves in response to applied pressure within a cylinder housing having a cylinder head, a catch block is secured to the piston, and the cylinder head incorporates a catch pin. Pressure applied to the cylinder to open the valve moves the piston adjacent to the cylinder head where the catch pin automatically engages the catch block preventing futher movement of the piston or premature closure of the valve. Application of pressure to the cylinder to close the valve, retracts the catch pin, allowing the valve to close. Included are one or more selector valves, for selecting pressure application to other apparatus depending on the gate valve position, open or closed, protecting such apparatus from damage due to premature closing caused by pressure loss or operational error.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

Patent:

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