Incrementally extendable telescopic mounting

摘要

Incrementally extendable telescopic mounting, the extension of which is determined by a guide lug, integral with a female element and moving inside a multi-segment cam-type guide system, laid out at the periphery of a male element, and by the relative positions of a single cylindrical arc shaped stop having a trapezoid cross-section and being laid out on one of the telescopic elements, the trapezoid perimeter bearing surface of said stop resting successively on a circumferential series of staged cylindrical arc shaped hollow stops laid out on the other telescopic element and preferably having the same angular length, the same radial depth and the same trapezoid perimeter and area as those of the single stop, said single and multiple staged cylindrical arc shaped hollow stops having preferably, within their respective telescopic elements, the same outer and inner diameters and, as their common center, the device axis.

主权项

1. An incrementally extendable telescopic mounting comprising:
a first cylindrical part defining a longitudinal axis and including
a first end part defining a circle,a first cylindrical wall,a first stop projecting from the first end part in a direction parallel to the longitudinal axis,the first stop defining a bearing surface there being a clearance betweenthe first stop and the first cylindrical wall; and a second cylindrical part including
a second end part,a second cylindrical wall,a second stop projecting from the second end part in a direction parallel to the longitudinal axis, the second cylindrical part being coaxially arranged with the first cylindrical part such that the second cylindrical wall fits into the clearance, wherein one of the first and second cylindrical parts defines a groove displaced from the first stop, the groove defining an incline that is non-parallel to the circle, and non-parallel to the longitudinal axis, a distance between a point, on the groove, and the circle varying with an angular displacement of the point about the longitudinal axis, and the other one of the first and second cylindrical parts includes a guide lug displaceable in the groove, whereby the second stop is positioned to selectively abut the bearing surface of the first stop.