Hoisting mechanism
AssigneeTandberg Telecom AS
InventorChristian MOENGEN
Life of this patent
Estimating the term…
Abstract
A hoisting mechanism comprises two main modules; a base (1) and a top-section (8). The base supports two concentric rings (2 and 3) with three or more flexible links (5 and 6) pivotally connected to each ring. There is one inner (6) and one outer (5) set of links, where the inner (6) set is pivotally connected to an inner ring (2) and the outer (5) set is pivotally connected to an outer ring (3). A ring (4) at the top is connected to all of the flexible links with rotary joints (9). When the two rings (2, 3) in the base are rotated in opposite directions, the flexible links (5 and 6) will force the top ring (4) to move up or down depending on the direction of which the concentric rings are turned.
Claims10
A hoisting mechanism comprising two main sections—a base section and a top/crown section,
- characterized in that
- the base comprises a first and a second circular member where the said two circular members are concentric and at least one can rotate freely around its center axis, the top section comprises a third circular member,
- the two main sections are joined by two or more pairs of links, wherein the first half of said links is connected to said first circular member, and the second half of said links is connected to said second circular member, and all said links are connected to said third circular member, by means of revolving joints.
A hoisting mechanism according to one of the preceding claims,
- characterized in that said links at all times have an angle, α, to the base section, where 0°<α<90°.
A hoisting mechanism according to one of the preceding claims,
- characterized in that said first circular member has a slightly smaller radius than said second circular member and is located inside said second circular member.
A hoisting mechanism according to one of the preceding claims,
- characterized in that the third circular member is configured to support an object.
A hoisting mechanism according to one of the preceding claims,
- characterized in that a bidirectional motor is provided to engage with one or both of said first and second circular member in such a way that said first and second circular member rotates in opposite directions when said motor is operating.
A hoisting mechanism according to one of the preceding claims,
- characterized in that said revolving joints are equally spaced around said circular members.
A hoisting mechanism according to claim one of the preceding claims,
- characterized in that said third circular member has the same radius as said second circular member.
A hoisting mechanism according to claim one of the preceding claims,
- characterized in that said third circular member have a different radius than said second circular member.
Dependencies are inferred from the claim text.