초록 ▼

A pivot hinge for an apparatus cover hood comprising sleeves concentric to the pivot axis and axially displaceably yet non-rotatably arranged relative to the housing bottom part on the latter, and the face sides of the sleeves, respectively, being formed with curved courses. A cam is pivotally mount

A pivot hinge for an apparatus cover hood comprising sleeves concentric to the pivot axis and axially displaceably yet non-rotatably arranged relative to the housing bottom part on the latter, and the face sides of the sleeves, respectively, being formed with curved courses. A cam is pivotally mounted about the pivot axis and with respect to the cover hood rotates therewith. Compression springs press the axially displaceable sleeves, respectively, with their curved courses against the cam, whereby the inclination of the curved courses relative to the radial plane of the sleeves and the measure or adjustment of the compression springs being selected such that within a predetermined rotation range of the cam about the axis, which corresponds substantially to the opening movement of the cover hood, there is produced a rotational moment with respect to the axis which corresponds in every position within the rotation range substantially to the rotational moment which is produced by the cover hood as a consequence of its gravity force, yet in an opposite rotational sense.

대표청구항 ▼

In an apparatus housing comprising a bottom part and a cover hood, the improvement comprising a pivotal connection means between said bottom part and said cover hood for opening and closing, respectively, said cover hood by pivoting the latter about an axis extending parallel to a side of said botto

In an apparatus housing comprising a bottom part and a cover hood, the improvement comprising a pivotal connection means between said bottom part and said cover hood for opening and closing, respectively, said cover hood by pivoting the latter about an axis extending parallel to a side of said bottom part, said means comprising at least one sleeve disposed concentrically to said pivot axis and axially displaceably, yet non-rotatably arranged relative to said bottom part on the latter, said at least one sleeve having a face side forming a curved course, a cam pivotally mounted about said pivot axis adjacent to said face side of said at least one sleeve, said cam being connected with said cover hood for joint rotation therewith, a compression spring operatively disposed pressing said axially displaceable sleeve with said curved course against said cam, and said curved course having an inclination relative to a radial plane through said at least one sleeve, said inclination and said compression spring being sized such that within a predetermined rotation range of said cam about said axis corresponding substantially to an opening movement of said cover hood, there is produced relative to said axis a rotational moment on said cam by said curved course of said sleeve pressing against said cam, which moment corresponds in every position within said rotation range substantially to a rotational moment produced by the gravity force on said cover hood, yet in an opposite rotational sense.