Laminar flow fans
Patent 5192183 Issued on March 9, 1993. Estimated Expiration Date: 
August 28, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 28, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2087834 2626135 2632598 3007311 3275223 3306588 Centrifugal pump Patent #: 4255081 InventorApplicationNo. 751425 filed on 08/28/1991US Classes:415/90, SMOOTH RUNNER SURFACE FOR WORKING FLUID FRICTIONAL CONTACT (E.G., UNBLADED RUNNER, ETC.)403/348, Lugged member, rotary engagement416/198R, MULTIPLE AXIALLY SPACED WORKING MEMBERS416/204RSPECIFIC WORKING MEMBER MOUNTExaminersPrimary: Look, Edward K.Assistant: Larson, James A. Attorney, Agent or FirmForeign Patent References
International ClassF01D 001/36Foreign Application Priority Data1990-09-11 EPAbstractA laminar flow fan is described comprising a number of fan elements, such as disks, carried on support posts. In a preferred embodiment, each element has a non-circular central aperture. The shape of the aperture provides sufficient clearance for the elements to be placed over the support posts in a first position. Rotation of the elements into a second position with respect to the support posts latches the elements into engagement with the posts, thereby maintaining the elements in this second position.Field of SearchMULTIPLE AXIALLY SPACED WORKING MEMBERSCircumferentially offset Differing radii Non-turbo machine SPECIFIC WORKING MEMBER MOUNT Radial flow devices SUPPORT MOUNTING, CARRIER OR FAIRING STRUCTURE SMOOTH RUNNER SURFACE FOR WORKING FLUID FRICTIONAL CONTACT (E.G., UNBLADED RUNNER, ETC.) Lugged member, rotary engagement Bayonet joint | |
