US Patent 7302999 Scraper blade and method for scraped-surface heat exchanger

Patent 7302999 was granted and assigned to SPX Corporation on December, 2007 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

SPX Corporation

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

73029990

Patent Inventor Names

Benjamin Hardy0

Date of Patent

December 4, 2007

Patent Application Number

103017220

Date Filed

November 22, 2002

Patent Primary Examiner

‌

Tho Duong

Patent abstract

A curved scraper blade for a scraped-surface heat exchanger pivots about an axis off the centerline of the blade. The profile of the blade is chosen to provide a low initial scrape angle and to change gradually if at all as the blade wears away in service. The off-center pivot placement allows scraped material to flow between the blade and the drive shaft. Several materials are suitable for the blade, including PEEK thermoplastic.