The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 15, 1995
Filed:
Jul. 29, 1994
Hsin M Hsieh, Ping Tung City, TW;
Other;
Abstract
A lubricating system for cooling fans is provided and mainly consists of a self-lubricating bearing, an oil retaining cap, and an oil retaining ring. The oil retaining ring has a central hole, an inner portion adjacent to the central hole and having a round cross section, and an outer flange portion integrally extended from the inner portion and having a concavo-concave cross section. The oil retaining cap is bowl-shaped and has a central opening, an inner convex portion, and an outer concave portion. The self-lubricating bearing has two end surfaces each of them being provided with a plurality of shallow bevel grooves inclining toward an axially extended shaft hole of the bearing, and an annular recess formed at a middle section of the shaft hole. With these arrangements, lubricant being sucked and jetted from the self-lubricating bearing during the rotation of the locating shaft of the cooling fan relative to the self-lubricating bearing can be reduced, that is, the oil loss of the self-lubricating bearing can be minimized and the usable life of the cooling fan can be prolonged due to smoother rotation of the locating shaft thereof.