[특허]Tension indicator for fastener means

[미국특허] Tension indicator for fastener means 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16B-031/02
출원번호	US-0635613 (1975-11-26)
발명자 / 주소	Bell Walter (Monroe NY)
출원인 / 주소	Star Expansion Industries Corporation (Mountainville NY 02)
인용정보	피인용 횟수 : 35 인용 특허 : 0

초록 ▼

A tension indicator for use with fasteners such as a cooperating nut and bolt. The tension indicator comprises a pair of washers for placing on the shank of the bolt between the bolthead or nut and the workpiece that is to be secured by the fastener. Each washer includes a concave central portion having a hole therethrough for receiving the shank of the bolt with the concave surfaces of the washers facing in opposite directions in the assembled condition. Each washer further includes at least one finger extending outwardly from the central portion. Prior to the application of the load on the tension indicator by either the fastener or the workpiece, the outermost end faces of the coacting fingers will be at equal and opposite angles with respect to each other. After a predetermined load has been applied to the fastener, the outermost end faces of the coacting fingers will be aligned with each other to thereby visually indicate that the desired load has been achieved. Preferably, each washer has a plurality of fingers, each washer including first and second spaced apart and diametrically opposed pairs of fingers as well as one pair of diametrically opposed single fingers that are interdigitated with the two pairs of spaced apart fingers in the assembled condition. In one embodiment, the desired load is achieved when the washers are fully compressed, while in a second embodiment the desired load is achieved before full compression of the washers is achieved. If desired, teeth may be formed on the central portion of each washer about the hole therethrough so that the washer acts as a lock washer.

대표청구항 ▼

A tension indicator for use with fastener means such as cooperating nut and bolt that are adapted to be applied to a workpiece, said tension indicator comprising a pair of washers adapted to be placed on the fastener means between a load applying surface thereof and the workpiece, each of said washers including opposing concave and convex surfaces, a central portion of each of said washers having a hole therethrough from said concave surface to said convex surface for receiving the fastener means, the concave surfaces of the pair of washers facing in opposite directions toward each other in an assembled condition, each of said washers further including at least one finger extending outwardly from said central portion, said one finger of each washer including an outermost end face disposed between opposing faces integrally extending from said concave and convex surfaces and between opposing sides thereof, said one finger of each washer being disposed in a side-by-side relationship to each other in said assembled condition with one of said sides of each finger being adjacent to each other, said end faces being inclined at different angles with respect to each other in said assemBled condition without any load being applied to said washers, said end faces of said fingers being aligned side-by-side with each other only when a predetermined load has been applied to said washers and the fastening means, and retention means disposed on at least one of said washers for preventing relative rotation between said washers to maintain said side-by-side relationship of said fingers.

이 특허를 인용한 특허 (35) 인용/피인용 타임라인 분석

Yoshida Minoru (Yamato JPX) Arai Teruo (Tokyo JPX) Ishikawa Toshiro (Yamato JPX) Shimada Masaji (Tokyo JPX) Susaki Shigeru (Yokohama JPX) Yamada Yukihiko (Yamato JPX) Ohta Hisao (Tokyo JPX) Nagami Ka, Apparatus for indicating incomplete and complete fastening of screw components.
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Pamer Walter R. (Parma OH), Load indicating fastener.
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Crumley, Harvel K., Load indicating washer.
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Bettin Carl J. (Menomonee Falls WI), Low profile force indicating fastener, especially for semiconductor clamps.
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Weiner Robert I. (305 W. Chesapeake Ave. Towson MD 21204), Saw blade retainer and kickback clutch assembly.
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Crumley, Harvel K., System and method for retrofitting walls with retaining ties.
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Holmes ; Peter C., Visual load indicator.
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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)
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[미국특허] Tension indicator for fastener means 원문보기

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