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Title: Spring performance tester for miniature extension springs

Abstract

A spring performance tester and method of testing a spring are disclosed that has improved accuracy and precision over prior art spring testers. The tester can perform static and cyclic testing. The spring tester can provide validation for product acceptance as well as test for cyclic degradation of springs, such as the change in the spring rate and fatigue failure.

Inventors:
;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1357509
Patent Number(s):
9,651,464
Application Number:
14/477,196
Assignee:
Sandia Corporation SNL-A
DOE Contract Number:
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Sep 04
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Salzbrenner, Bradley, and Boyce, Brad. Spring performance tester for miniature extension springs. United States: N. p., 2017. Web.
Salzbrenner, Bradley, & Boyce, Brad. Spring performance tester for miniature extension springs. United States.
Salzbrenner, Bradley, and Boyce, Brad. Tue . "Spring performance tester for miniature extension springs". United States. doi:. https://www.osti.gov/servlets/purl/1357509.
@article{osti_1357509,
title = {Spring performance tester for miniature extension springs},
author = {Salzbrenner, Bradley and Boyce, Brad},
abstractNote = {A spring performance tester and method of testing a spring are disclosed that has improved accuracy and precision over prior art spring testers. The tester can perform static and cyclic testing. The spring tester can provide validation for product acceptance as well as test for cyclic degradation of springs, such as the change in the spring rate and fatigue failure.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 16 00:00:00 EDT 2017},
month = {Tue May 16 00:00:00 EDT 2017}
}

Patent:

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  • An annulus pressure responsive valve apparatus is described comprising: a housing having a flow passage disposed therethrough; valve means, disposed in the flow passage, and movable between a closed position wherein the flow passage is closed, and an open position wherein the flow passage is open; differential pressure responsive power piston means slidably disposed in the housing, and operably associated with the valve means, the power piston means having first and second positions relative to the housing corresponding to the closed and open positions, respectively, of the valve means; a resilient spring retaining means, operatively associated with the power pistonmore » means and the housing, for releasably retaining the power piston means in its second position relative to the housing corresponding to the open position of the valve means. This is done until a force urging the power piston means from its second position toward its first position exceeds a retaining force provided by the retaining means, the resilient spring retaining means including: and spring means, longitudinally fixed relative to one of the power piston means and the housing, so that the spring means moves longitudinally with the one relative to the other of the power piston means and the housing.« less
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