[특허]Spring balance assembly

Spring balance assembly 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B65B-003/04
출원번호	US-0506276 (1983-06-21)
발명자 / 주소	Vroonland, Evart. J. Curtis, William M.
출원인 / 주소	Continental Emsco Company
대리인 / 주소	Arnold, White & Durkee
인용정보	피인용 횟수 : 51 인용 특허 : 0

초록 ▼

This invention provides for a loading arm for use with material handling systems and includes a support structure and an arm pivotally attached to the support structure for swivel movement in both the horizontal and vertical plane relative to the support structure. There is also provided a balancing system for balancing the swivel arm relative to the support structure which includes a coil spring having a pre-determined length, a housing enclosing the coil spring, a first end of the housing having a structure for engaging a first coil end of the coil spring and an adjustment device for positioning that first coil end in infinitely small increments along a generally circular path which is radially disposed from the center line of the spring, a second end of the housing having another groove for engaging a second coil end of the spring, a linkage arm attached at one end to the swivel arm and at its other end to the second end such that movement of the swivel arm in the vertical plane will cause the second coil end to move along a generally circular path radially disposed from the centerline of the spring. The system also includes a mounting structure for attaching the balancing system to the loading arm and the horizontal swivel.

대표청구항 ▼

1. A loading arm comprising: (a) a support means; (b) an arm pivotally attached to said support means for swivel movement in the horizontal and vertical plane relative to said support means; (c) a means for balancing said swivel arm relative to said support means including: (1) a coil spring of pre-determined length; (2) a housing enclosing said coil spring; (3) a first end of said housing having a means for engaging a first coil end of said coil spring and a means for positioning said first coil end in infinitely small increments along a generally circular path radially disposed from the center line of said spring; (4) a second end of said housing having a means for engaging a second coil end of said spring; (5) a linkage arm attached at one end to said swivel arm and at its other end to said second end such that movement of said swivel arm in said vertical plane will cause said second coil end to move along a generally circular path radially disposed from the centerline of said spring; and (d) a means for attaching said balancing means to said loading arm and said horizontal swivel means. 2. The loading arm of claim 1 wherein said coil spring is a torsion spring. 3. The loading arm of claim 1 wherein means are provided to support said swivel arm in a rigid position relative to said spring balancing system to thereby relieve said coil spring of the swivel arm load. 4. The loading arm of claim 1 wherein said means for positioning said first coil end in infinitely small increments includes an adjusting screw, a barrel nut into which said adjusting screw threads, said barrel nut having a means for engaging said first coil end and being rotatably mounted in said housing and a stop to thereby limit the travel of said barrel nut. 5. In a loading arm having a support means, a swivel arm attached to said support means that is capable of swiveling in the horizontal and vertical planes relative to said support, and a spring balancing system, said spring balancing system comprising: (a) a coil spring of pre-determined length having oppositely disposed coil ends; (b) a housing, generally cylindrical in shape, for protectively enclosing said spring and having oppositely disposed end caps; (c) a first end cap having a cut-out for receiving a first coil end, a barrel nut eccentrically positioned in said first end cap and having its threaded bore perpendicular to the center of said spring, and positioned along a chord of said end cap; (d) an adjusting bolt for engaging said barrel nut and adapted to move said barrel nut and rotate said first end cap; (e) a second end cap having a cut-out for receiving a second coil end, and an outwardly extending extension element; (f) a linkage arm attached at one end to said swivel arm and at its other end to said second end cap such that movement of said swivel arm in said vertical plane will cause said coil end to move along a circular path, radially disposed from the center line of said housing. 6. The spring balance system of claim 5 wherein said coil spring is a torsion spring. 7. The spring balance system of claim 5 wherein said first end cap includes a stub shaft which has a groove for receiving said first coil end and wherein said second end cap includes a stub shaft having a groove for receiving said second coil end. 8. The spring balance system of claim 5 wherein means are provided to support said swivel arm in a rigid position relative to said spring balancing system to thereby relieve said coil spring of the swivel arm load. 9. The spring balance system of claim 5 wherein said adjusting bolt includes a stop to thereby limit the travel of said barrel nut.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
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