| Patent Number |
Title Of Patent |
Date Issued |
| 5423660 |
Fan inlet with curved lip and cylindrical member forming labyrinth seal |
June 13, 1995 |
| An improved plastic, injection-molded shroud/banded fan combination in which the shroud extends axially from an inlet portion to an outlet portion, and the outlet portion comprises means for connecting a heat exchanger to the shroud, More specifically, the shroud includes an inlet li |
| 5342167 |
Low noise fan |
August 30, 1994 |
| An axial flow fan includes blades mounted on a hub and extending radially outward to a shroud disposed around the hub. Pairs of stators are connected to the shroud at positions angularly spaced about the inner periphery of the shroud. Each pair of stators includes a trailing stator a |
| 5297931 |
Forward skew fan with rake and chordwise camber corrections |
March 29, 1994 |
| An improvement to forwardly skewed axial fans whereby blade camber and rake are coordinated with skew. The blades are characterized in that a line defined by the points of maximum chordwise camber (f.sub.max) as a function of changing radial position (r) is on the leading edge side of |
| 5156524 |
Centrifugal fan with accumulating volute |
October 20, 1992 |
| Centrifugal blowers which maintain a substantially constant (usually .+-.5%) static pressure field around the circumference of the blower's impeller, notwithstanding at least one abrupt radial or axial discontinuity in the volute of the blower, e.g., due to one or more external axial |
| 5151014 |
Lightweight airfoil |
September 29, 1992 |
| An airfoil having a suction surface and a pressure surface, the surfaces joined together at leading and trailing portions of the airfoil, the pressure surface converging toward the suction surface at a corner, the surface converging at the corner by an angle approximately equal to or |
| 5064345 |
Multi-sweep blade with abrupt sweep transition |
November 12, 1991 |
| A blade for a fan or blower which has an abrupt transition region between an inner blade region which has a negative leading edge sweep angle, and an outer blade region which is highly forwardly swept. The outer blade region is further characterized by a blade chord that increases with |
| 5000660 |
Variable skew fan |
March 19, 1991 |
| An axial flow fan comprising: a cental hub rotatable on an axis; and a plurality of blades extending from the hub, each of the blades comprising a root portion adjacent to the hub, and terminating in a tip portion, the root portions of the blades being approximately evenly spaced around |
| 4971520 |
High efficiency fan |
November 20, 1990 |
| The invention features an axial fan for passing air through a heat exchanger, the fan comprising a hub rotatable on an axis and a plurality of blades, each of which extend radially outward from a root portion attached to the hub to a tip portion, the blades characterized by a trailin |
| 4917572 |
Centrifugal blower with axial clearance |
April 17, 1990 |
| A centrifugal blower with rearwardly curved impeller blades positioned in a housing between two housing faces that are spaced apart along the impeller axis. One of the housing faces defines a housing inlet. The housing is substantially closed off with the exception of the inlet and an ou |
| 4900228 |
Centrifugal fan with variably cambered blades |
February 13, 1990 |
| Boundary layer separation in a rearwardly skewed centrifugal impeller can be better controlled by designing the impeller blades with an "S" camber, i.e., with rearward curved radially extending blades in a centrifugal blower. The blades have a positive camber at a radially inward region |
