Door drive mechanism including belt transmission for doors
OwnerErich Doringinventor
Life of this patent
Estimating the term…
Abstract
A motor driven door drive mechanism is provided having a belt transmission including a flat belt or a round belt which passes around two rotating guide wheels of which at least one is driven to take along the belt. The driven wheel is embodied by a gear and another gear is provided which loosely meshes with the drive gear, partly pressing the belt into the gaps between the teeth thereof. This arrangement offers a sound compromise between the amount of drive force that can be transmitted, and the manufacturing cost and results in low noise level in operation.
Claims15
A door drive means for wing-, panel-, sectional- or over-the-head-type doors, in particular for automobile garages or workrooms, comprising a belt transmission having a belt or band which passes around at least two rotating guide wheels, one of which being a drive wheel, and further having means by which the drive force for opening and closing of the door is derived from the belt or from a guide wheel and transmitted to the door, wherein the drive wheel is embodied by a first gear and wherein at least another gear is provided which meshes loosely with the first gear, pressing the belt being made of deformable fiber material into the gaps between teeth of the first gear to such an extent that the belt travels practically without slip.
A belt transmission especially for use in a door drive means, comprising a belt which is passed around at least two rotating guide wheels, including at least one drive wheel to entrain the belt, wherein the drive wheel is embodied by a gear and at least another gear is provided which meshes loosely with said gear to take along the belt being made of deformable fiber material, during rotation, by the tips of the teeth of one gear pressing the belt into the gaps between teeth of the other gear to such an extent that the belt travels practically without slip.
Dependencies are inferred from the claim text.