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In 1941, the Hilti company Maschinenbau Hilti OHG was founded by Martin (1915–1997) and Eugen Hilti (1911–1964), [3] with the opening of a mechanical workshop in Schaan, Liechtenstein. Martin Hilti was trained in mechanical engineering and automotive design at the Wismar Engineering College and was 26 at the time of founding the company.
Ramset powder-actuated tool. A powder-actuated tool (PAT, often generically called a Hilti gun or a Ramset gun after their manufacturing companies) is a type of nail gun used in construction and manufacturing to join materials to hard substrates such as steel and concrete.
Example (inch, coarse): For size 7 ⁄ 16 (this is the diameter of the intended screw in fraction form)-14 (this is the number of threads per inch; 14 is considered coarse), 0.437 in × 0.85 = 0.371 in. Therefore, a size 7 ⁄ 16 screw (7 ⁄ 16 ≈ 0.437) with 14 threads per inch (coarse) needs a tap drill with a diameter of about 0.371 inches.
The SDS bit was developed by Bosch in 1975 improving on the TE system introduced by Hilti in 1960. Hilti's original 10 mm TE-D and 18 mm TE-F shanks can be used in SDS-plus and SDS-max chucks respectively but not vice versa while the newer TE-C, TE-T and TE-Y are fully compatible. The SDS name is an acronym of German: Steck – Dreh – Sitzt!
Anchor bolts are used to connect structural and non-structural elements to concrete. [2] The connection can be made by a variety of different components: anchor bolts (also named fasteners), steel plates, or stiffeners.
Figure 1 of the original patent for the molly bolt, U.S. Patent No. 2,018,251. The molly bolt was patented in 1934 by George Frederick Croessant. [3] Although his patent acknowledges that expandable fasteners of this general kind were already known, Croessant's patent is intended to provide "an improved and adequate anchoring grip that may be retightened if necessary and that will permit ...