Scraped-surface apparatus
Patent 4185352 Issued on January 29, 1980. Estimated Expiration Date: 
February 10, 1998. 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.
February 10, 1998. 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 3145017 3848289 Swept surface heat exchanger Patent #: 4073339 InventorAssigneeApplicationNo. 05/876596 filed on 02/10/1978US Classes:15/246.5, Tank cleaners15/104.04, Outside165/95, WITH CLEANING MEANS FOR HEAT EXCHANGER62/354Moving scraperExaminersPrimary: Roberts, Edward L.Attorney, Agent or FirmInternational ClassF28F 19/00 (20060101)AbstractScraped-surface heat exchangers and similar apparatus employing scraper blades hinged to a shaft so as to scrape a fluid being processed from an elongated cylindrical wall are improved so as to obviate any need either for separate bearings at opposite ends of the shaft or for special skids to be used in disassembly and reassembly and so as to allow the blades to be biased against the wall without separate springs. Each blade bears on the wall not only at its leading or scraping edge but also at a trailing or bearing surface, so as to center the shaft and facilitate its rotation, so as to hold the edge in uniform relation to the wall, and so as to bias the edge of the blade against the wall. | |
