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Putzmeister was founded by Karl Schlecht in 1958. [3] Schlecht designed a mortar machine based on his diploma thesis at the University of Stuttgart. [4]In 1986, Putzmeister 52Z's were used in the Chernobyl nuclear accident, pumping over 300,000 m 3 (390,000 cu yd) of concrete to entomb reactor number 4, setting a world record at the time for volume pumping.
Schwing Concrete pump. The Schwing Group was founded as a medium-sized enterprise on 17 March 1934, by Friedrich Wilhelm Schwing (* 1909; † 1992), a locksmith from Wanne-Eickel. In 1957, Schwing built the world's first oil-hydraulic two-cylinder concrete pump. Starting in 1964, the company also built the first large concrete mixers.
Boom pumps are capable of pumping at very high volumes and are less labor intensive to operate when compared to line or other types of concrete pumps. The second main type of concrete pump, commonly referred to as a "line pump" or trailer-mounted concrete pump, is either mounted on a truck or placed on a trailer. This pump requires steel or ...
Ainsworth had the home built in 1910 as a retirement home, and he lived there with his wife Persis and several children. It was designed by Ina Ainsworth Butler, daughter of Lewis and Persis. Lewis Ainsworth lived at the home for only four years until his death in 1914, and was sick for most of the time. The house remained in the family until 1975.
Once the project failed due to a lack of water and sewer access, the developers put the estate up for sale. [2] [4] The Tualatin Hills Park & Recreation District purchased the Jenkins estate in 1976 for $525,000. [5] In 1978, the estate was added to the National Register of Historic Places as the Belle Ainsworth Jenkins Estate. [2] [4]
H-beam sections (typical column sections, due to resistance to bending in all axis) may be driven at angles "raked" to rock or other firmer soils; the H-beams are left extended above the base. A reinforced concrete plug may be placed under the water, a process known as tremie concrete placement. When the caisson is dewatered, this plug acts as ...
The company's founder, John Ainsworth, had previously been a director of Nelsons, a homeopathic pharmacy. [3] His new company was incorporated in 1974 as J.B.L. Ainsworth (Caterham) Ltd, and its first pharmacy opened in London in 1978. By 1989 the company had 56 employees. [3]
Ainsworth is a neighborhood of Hobart, Indiana. Prior to the early 1990s, it was an unincorporated community in Ross Township , Lake County, Indiana . The Grand Trunk Railroad was extended to Ainsworth in 1880.