| US Patent: 3,983,595 
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| Arcuate Scraper for Concave Surfaces | 
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| Patentees: |  
 | Raymond G. Knudsen (exact or similar names) - Kenosha, WI |  | Steven R. Wente (exact or similar names) - Kenosha, WI |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Dec. 08, 1975 |  
| Granted: | Oct. 05, 1976 |  USPTO (New site tip)
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                        Stan Schulz
 Snap-On Tools Company History
 
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| Description: |  | Edward U. Dithmar. - patent attorney
Abstract
An arcuate scraper for concave surfaces, such as the inside surface of many automobile windshields, having an elongated handle with a forward end portion arcuate in transverse cross section, a scraping blade disposed transversally on the concave surface of the forward end of portion, a longitudinally movable slider connected with the blade for extending and retracting the scraping edge thereof with respect to the forward end of the handle and a tiltable keeper operatively related to the slider for locking same and the blade alternatively in blade-extended and blade-retracted positions. |  |