(19)

(11)

EP 2 097 731 A1

(12)

(43) Date of publication: 09.09.2009 Bulletin 2009/37 (21) Application number: 06851506.3 (22) Date of filing: 28.12.2006

(51) International Patent Classification (IPC):  G01N 1/00(2006.01) (86) International application number: PCT/US2006/049429 (87) International publication number: WO 2008/082377 (10.07.2008 Gazette 2008/28)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (71) Applicant: Perry Equipment Corporation Mineral Wells, TX 76067-9502 (US)	(72) Inventors: BURNS, David Mineral Wells, TX 76067 (US) BORJON, Tomas Millsap, TX 76066 (US) SCOTT, Mark Weatherford, TX 76087 (US) (74) Representative: Harrison Goddard Foote  Belgrave Hall Belgrave Street Leeds LS2 8DD Leeds LS2 8DD (GB)