IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0104647
(1987-10-05)
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발명자
/ 주소 |
- Rygiel Witold W. (1840 Mesquite Ave.
- Suite A Lake Havasu City AZ 86403)
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인용정보 |
피인용 횟수 :
14 인용 특허 :
5 |
초록
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The stand up articulated ski described herein consists of a steerable first ski in front, a combination of steering shaft with handlebars attached to the first ski, a second ski following the first with tandem, spaced, front and rear toe cups on top, a brake attached to the tail of the second ski, p
The stand up articulated ski described herein consists of a steerable first ski in front, a combination of steering shaft with handlebars attached to the first ski, a second ski following the first with tandem, spaced, front and rear toe cups on top, a brake attached to the tail of the second ski, pivot pin assembly joining the second ski to the steering shaft, and a coil spring on the steering shaft, interposed between the pivot pin assembly and the first ski. The pivot pin assembly consists of a case tube assembly coaxial with the steering shaft, a pair of spaced pivot pin plates, each supporting an upwardly directed pivot pin coaxial with the rotational axis integrally attached to the case tube and adapted to engage corresponding ones of a pair of pivot bearings integrally attached to a bearing fixture that is attached to the tip of the second ski.
대표청구항
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In an articulated snow ski comprising two skis in linear sequence, a first ski followed by a second ski, each of said two skis having in succession front to rear a tip, a shovel section, a nominally horizontal waist section, a tail, a nominally horizontal longitudinal axis, track lengths L1 and L2,
In an articulated snow ski comprising two skis in linear sequence, a first ski followed by a second ski, each of said two skis having in succession front to rear a tip, a shovel section, a nominally horizontal waist section, a tail, a nominally horizontal longitudinal axis, track lengths L1 and L2, respectively, said second ski having a modified upswept tip, said track length L2 being adequate to support both feet of the skier in tandem on top of said second ski, said first ski being steerable by handlebars surmounting a steering shaft secured to said first ski, the improvement comprising (a) a steering pivot fixture affixed to said modified unswept tip of said second ski, said steering pivot fixture providing a spaced pair of pivot pin bosses in alignment with a rotational bearing axis, said rotational bearing axis being rearwardly inclined from vertical by an angle=aabb45°clockwise and counter-clockwise, respectively, of front center; (e) a first hinge assembly comprising a Tee-branched spider secured to said lower end of said steering shaft, a first horizontal hinge pin, and a pair of pillow block bearings secured to said first ski; (f) said steering shaft consisting of separate, coaxial, rotationally locked, reciprocatively independent, upper and lower segments; (g) said upper segment being provided with a pair of spaced stop collars secured at its lower end, each one of said pair of stop collars being likewise secured to the top portion of said case tube; (h) said lower segment having a polygonal cross section, the upper portion of said lower segment reciprocatively engaging the corresponding polygonal hole of an upper linear reciprocation bearing, saud upper linear reciprocation bearing being secured to the intermediate lower portion of said case tube; (i) a compression spring, coaxially surrounding said lower segment, being engaged under compression between the bottom face of said upper linear reciprocation bearing and the top face of a lower piston; (j) said lower piston being secured to said lower segment at a distance of about 2 inches above a shoulder face on said Tee-branched spider, said lower piston being adapted to reciprocatively engage the lower portion of said case tube; (k) a washer capping the upper end of said lower segment, said washer being adapted to overhang the periphery of said upper end of said lower segment, said washer being secured to said lower segment with an axial screw engaging with its threaded end a threaded hole in said Tee-branched spider, said washer being adapted to contact the top of said upper linear reciprocation bearing under zero compression load; (l) the length of said lower segment being adapted to support said first ski under zero compression load at about 1.5 inches (38 mm) below the nominal level of said second ski; (m) said shoulder face on said Tee-branched spider being adapted to bottom out against the bottom end of said case tube under excessive compression load; (o) said first ski being secured, at a location proximal its midpoint, to said pair of pillow block bearings; (p) a spiral coil spring adjacent said first horizontal hinge pin in said Tee-branched spider and said pair of pillow block bearings, urging said first ski to nose upward; (q) a maximum nose-up angle, nu max, stop boss on said Tee-branched spider cooperating with a nose-up stop bolt in said first ski adjacent to and forwardly of said first horizontal hinge pin; (r) a minimum nose-down angle, nd min, stop boss on said Tee-branched spider cooperating with a nose-down stop bolt in said first ski adjacent to and rearwardly of said first horizontal hinge pin; whereby the maximum stroke of reciprocation is limited to about 2 inches (51 mm) and the bumps of the terrain encountered by said first ski are cushioned by said compression spring before reaching the handlebars and said second ski.
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