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US 4,955,791 AGranted
Small size fan
AssigneePapst-Motoren GmbH & Co. KG
InventorGunter Wrobel
Life of this patent
Estimating the term…
Abstract
A bearing assembly for a small compact sized fan is provided which can utilize either a sintered bearing or a roller bearing, and which provides several embodiments for positioning the bearings in a radial and axial direction. The invention utilizes a bearing support tube for constraining the bearing in radial direction and an end cover cap attached to a flange of the fan duct to retain the bearings in an axial direction.
Claims35
A bearing arrangement for the shaft of an axial flow small compact sized fan comprising:
- a central driving motor for the fan which has a shaft which drives an impeller of the fan;
- a bearing unit means for said shaft;
- said bearing unit means contacting and supporting said shaft in a radial direction as concerns the rotation of the shaft;
- a bearing support tube means located radially outward of the bearing unit means and supporting said bearing unit means in a radial direction as concerns the rotation axis of the shaft;
- a flow duct surrounding the impeller and having a flange means extending inwardly from adjacent the outer edge of the flow duct;
- the bearing support tube means having a first shoulder portion;
- a closure means having a second shoulder portion;
- the bearing unit means being braced between the first and second shoulder portions;
- and
- the closure means being supported by said flange means.
7 more elements
Dependencies are inferred from the claim text.