IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0800526
(1991-12-02)
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| 우선권정보 |
JP-0075698 (1985-04-09); JP-0086983 (1985-04-22); JP-0029917 (1986-02-15); JP-0030951 (1986-02-17); JP-0031932 (1986-02-18); JP-0032879 (1986-02-19) |
|
발명자
/ 주소 |
- Kimura Akira (Kyoto JPX) Kitao Nobuo (Yamatokouriyama JPX) Yasuda Hiroshi (Takatsuki JPX) Isozaki Kiyoshi (Osaka JPX) Nishimura Hiroshi (Osaka JPX) Shimomura Yoshimasa (Tokyo JPX)
|
| 출원인 / 주소 |
- Tsubakimoto Chain Co. (Osaka JPX 03)
|
| 인용정보 |
피인용 횟수 :
65 인용 특허 :
0 |
초록
▼
A universally articulable supporting sheath comprises an interconnected series of links, each having a convex spherical surface at one end, and a concave spherical surface at its opposite end. The concave and convex surfaces mate with one another to form the sheath. Special links having branch openi
A universally articulable supporting sheath comprises an interconnected series of links, each having a convex spherical surface at one end, and a concave spherical surface at its opposite end. The concave and convex surfaces mate with one another to form the sheath. Special links having branch openings may be provided. Various forms of waterproofing seals are provided, including O-rings, axially compressed rings, flexible belts, and ridges on the spherical surfaces. The links can be fitted together by thermal expansion. However, an axially split link is also described, which comprises two parts which snap together. The split parts may be molded as a unit with an integral thin wall hinge. The bending characteristics and bending radius of a sheath can be modified by insertion of spacers between the links at selected locations, or by the insertion of pins into radial holes provided in the links. Spacers with tongues may be used to prevent rotation of the links about the sheath axis, while allowing unidirectional articulation. Projections on one of a pair of mating spherical surfaces can be engaged with holes, slots or recesses of rectangular or other shapes to produce various limits on articulation and rotation. A single link may be provided with several alternatively usable holes, recesses and the like. The outer surface of a link can be provided with an axial extension engageable with a surface of an adjoining link to prevent back bending, or to prevent bending altogether.
대표청구항
▼
A flexible supporting sheath for a cable or the like comprising a series of interconnected links, each link having an internal passage, with circular cross-sections transverse to its length, extending through it from one end to the other, an inner concave spherical surface formed in the passage adja
A flexible supporting sheath for a cable or the like comprising a series of interconnected links, each link having an internal passage, with circular cross-sections transverse to its length, extending through it from one end to the other, an inner concave spherical surface formed in the passage adjacent to one end of the link, and an outer convex spherical surface formed on the outer surface of the link adjacent to its opposite end, in which, for at least two adjoining links of the sheath, the convex surface of a first of said two links is engaged with a concave surface of the second of said two links; in which the centers of the engaged convex and concave surfaces coincide; in which the concave surface of said second link overlaps the convex surface of said first link to an extent such as to prevent separation of said two links while allowing articulation of said two links, the internal passage of each of said two adjoining links having an intermediate portion located between the concave surface of its passage and the end portion of the passage inside the portion of the link having the outer convex surface, the diameter of said end portion of the passage of said first link, from its opening to a location spaced inwardly from said opening by a distance substantially greater than the distance from said opening to the center of curvature of said outer convex surface, being greater than the minimum diameter of the intermediate portion of the passage of said second link, whereby said adjoining links form a continuous hollow passage for a cable or the like to pass through, and in which said diameter of said end portion of the passage of said first link is sufficiently greater than the minimum diameter of the intermediate portion of the passage of the second link, that, when said first and second links are bent relative to each other to the limit of their articulation, said opposite end of the first link does not extend beyond said intermediate portion of the second link into said continuous hollow passage, whereby flexing of the sheath is prevented from imparting shear and tension to said cable or the like; and in which one of the engaged spherical surfaces of at least one of said two links is provided with at least one projection, while the other of said two links is provided with a recess for each projection on said one link, and each projection on said one link is engaged with a corresponding recess of said other link, whereby freedom of articulation of said two links is limited by engagement of at least one projection on said one link with boundaries of a corresponding recess on said other link.
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