fresno scraper การใช้

• Porteous formed the Fresno Agricultural Works, which between 1884 and 1910 produced thousands of Fresno Scrapers.
• Porteous bought the patents held by Deidrick, Dusy, and McCall, gaining sole rights to the Fresno Scraper.
• In 1991 the Fresno Scraper was designated as an International Historic Engineering Landmark by the American Society of Mechanical Engineers.
• The "'Fresno Scraper "'is a machine pulled by horses used for constructing canals and ditches in sandy soil.
• Prior scrapers pushed the soil ahead of them, while the Fresno scraper lifted it into a C-shaped bowl where it could be dragged along with much less friction.
• After working on a project to build a bridge across the Stanislaus River, and seeing first hand the Fresno scraper, he was anxious to put to use his mechanical skills.
• His ideas, combined with those of fellow-inventors William Deidrick, Frank Dusy, and Abijah McCall, all of Selma, California led to the Fresno Scraper ( 1883 ).
• Between 1884 and 1910 thousands of Fresno scrapers were produced at the Fresno Agricultural Works which had been formed by Porteous, and used in agriculture and land levelling, as well as road and railroad grading and the construction industry.
• The design of the Fresno Scraper forms the basis of most modern scrapers, having the ability to scrape and move a quantity of soil, and also to discharge it at a controlled depth, thus quadrupling the volume which could be handled manually.