(19)

(11)

EP 0 324 830 A1

(12)

(43) Date of publication: 26.07.1989 Bulletin 1989/30 (21) Application number: 88906470.0 (22) Date of filing: 28.06.1988

(51) International Patent Classification (IPC):  A62B 1/ 14( . ) B61B 7/ 00( . ) A62B 99/ 00( . ) B61B 12/ 00( . ) (86) International application number: PCT/US1988/002163 (87) International publication number: WO 1989/000121 (12.01.1989 Gazette 1989/02)

(84) Designated Contracting States: AT CH DE FR IT LI (30) Priority: 02.07.1987 US 19870069348 (71) Applicants: SMITH, Flint K. Aspen, CO 81611 (US) CUNNINGHAM, Robert T. Aspen, CO 81611 (US)	(72) Inventors: SMITH, Flint K. Aspen, CO 81611 (US) CUNNINGHAM, Robert T. Aspen, CO 81611 (US) (74) Representative: Goodanew, Martin Eric, et al  MATHISEN, MACARA & CO. The Coach House 6-8 Swakeleys Road Ickenham Uxbridge UB10 8BZ Ickenham Uxbridge UB10 8BZ (GB)