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특허 상세정보

Pressure variation detecting type leakage inspection system with temperature compensation

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G01M-003/32    G01K-013/00    G01K-019/00   
미국특허분류(USC) 364/558 ; 364/557 ; 73/492 ; 73/52
출원번호 US-0694448 (1984-12-21)
우선권정보 JP-0080944 (1983-05-11)
국제출원번호 PCT/JP84/00237
§371/§102 date 19841221 (19841221)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 22  인용 특허 : 7
초록

A temporal variation in a fluid pressure of a fixed value applied to an article under inspection, or in the differential pressure between it and a fluid pressure applied to a comparison tank, is measured, and the measured value is compared with a reference value, thereby judging whether the airtightness of the article under inspection is good. Of the measured pressure or differential pressure data, data on the inspected articles judged non-defective are stored, by a predetermined number, in accordance with individual temperature differences between them ...

대표
청구항

Pressure variation detecting type leakage inspection equipment comprising: pressure measuring means for detecting a variation, in a fixed period of time, in the pressure difference between an article under inspection and a reference tank; an A-D converter for converting the measured pressure difference into digital pressure difference data; first temperature measuring means for detecting the temperature of said article under inspection; second temperature measuring means for detecting the temperature of said reference tank; temperature difference produci...

이 특허를 인용한 특허 피인용횟수: 22

  1. Pan, Yung-Tai; Tsai, Jung-Lang. Close-type speaker leak test system and method. USP2017069693161.
  2. Püttmer, Alf. Diagnostic system for a valve. USP2014108850880.
  3. Danielson Robert B. ; Meisinger Stanlee W.. Leak detection apparatus and method. USP1999126003363.
  4. Furuse Akio,JPX ; Horikawa Hiroshi,JPX ; Nakagomi Masayuki,JPX. Leak test method and apparatus. USP2001026182501.
  5. Gocho,Masanori. Leak tester. USP2007117290440.
  6. McCoy,Fred Grant; Fazekas,Jonathan Mark; Borntrager,Ryan R.. Method and apparatus for detecting a gas. USP2006057051578.
  7. McCoy, Fred Grant; Fazekas, Jonathan Mark; Borntrager, Ryan R.. Method and apparatus for detecting leaks. USP2005016840086.
  8. McCoy, Fred Grant; Fazekas, Jonathan Mark; Borntrager, Ryan R.. Method and apparatus for detecting leaks. USP2005036860140.
  9. McCoy, Fred Grant; Fazekas, Jonathan Mark; Borntrager, Ryan R.. Method and apparatus for detecting leaks. USP2005036860141.
  10. McCoy,Fred Grant; Fazekas,Jonathan Mark; Borntrager,Ryan R.. Method and apparatus for detecting leaks. USP2007027178385.
  11. Brennecke Hermann (Darmstadt DEX) Liere Horst (Eppertshausen DEX) Koch Reinhold (Bad Konig DEX). Method and apparatus for explosion protection of plants, pipelines and the like by pressure monitoring. USP1990054928255.
  12. Bustamante, Anthony T.. Method and apparatus for oil leak testing. USP2010057707870.
  13. Witschi Friedrich (Buren an der Aare CHX). Method and apparatus for testing the tightness of housings. USP1997025600996.
  14. Hill, Donna Rene; Norcom, John David. Method for determining the work required to expel a tampon from a tampon applicator. USP2013038402809.
  15. Lehmann Martin (Obere Farnbhlstrasse 1 5610 Wohlen CHX). Method of leak testing, leak testing device, and temperature measuring device as well as a method for measuring a temper. USP1990014896530.
  16. Murakami Koji (Settsu JPX) Higeta Kazuya (Osaka JPX) Touchi Hachiro (Higashiosaka JPX). Method of measuring temperature and apparatus for effecting the method. USP1989114881185.
  17. Ghandhi Jamshed B.. Rapid evaluation of thin-film barrier coatings on thick substrates via transient response measurements. USP1998085792940.
  18. Ghandhi Jamshed B.. Rapid evaluation of thin-film barrier coatings on thick substrates via transient response measurements. USP2000096116081.
  19. Morrison Jr. Charles F. (Boulder CO). Temperature compensation for pressure gauge. USP1989094866640.
  20. Jenkins Anthony (Fowlmere GB2). Temperature compensation in differential pressure leak detection. USP1990084947352.
  21. Alexander William B. (New Orleans LA) Frenger Paul (Houston TX). Testing device and method for inflatable objects. USP1989104873654.
  22. Furuse Akio (Hachioji JPX). Volume measuring apparatus and method. USP1989124888718.