Fan ventilator having multiple modes of operation
Patent 4773310 Issued on September 27, 1988. Estimated Expiration Date: 
December 1, 2006. 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.
December 1, 2006. 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 ReferencesInventorApplicationNo. 06/936895 filed on 12/01/1986US Classes:454/244, With air pump means for both inlet and outlet airways454/210With extensible side panelExaminersPrimary: Joyce, HaroldAttorney, Agent or FirmInternational ClassesF24F 3/16 (20060101)F24F 7/013 (20060101) AbstractA ventilator having a housing containing a plurality of electric fan units, each of which is mounted in an air channel provided in the housing for directing air through the ventilator. Within the housing, the air channels are formed by cowlings which surround the individual fan unit. The ventilator also includes a filter element mounted on the housing to filter air moved through the ventilator channels by the fan units. The ventilator further includes a controller featuring a plurality of switches and an electrical network for electrically connecting the fan units to a source of electrical power such as a wall socket. The switches of the controller are manually operable to permit selective activation of the fan units so that multiple modes of ventilator operation may be selected. In accordance with the multiple modes of operation, air may be filtered and moved through the ventilator either in a first direction or a second direction or in both a first direction and a second direction and circulated. | |
