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  2. OTC Tool Company - Wikipedia

    en.wikipedia.org/wiki/OTC_Tool_Company

    OTC Tools (originally Owatonna Tool Company) is a tool and equipment manufacturer. It was founded in Owatonna, Minnesota, by Godfrey Kaplan, who operated a small machine shop there. Kaplan's son Rueben, invented the "Grip-O-Matic" universal gear puller and received his first patent. [1] The tool remains virtually unchanged to this day. [2]

  3. Pentair - Wikipedia

    en.wikipedia.org/wiki/Pentair

    In 1984 Pentair purchased the remains of the Power Tool Division from Rockwell. [14] This consisted chiefly of the Delta line of shop tools and marked Rockwell's exit from the tool business. In 1988, Pentair agreed to acquire FC Holdings Inc., the holding company for Federal Cartridge and Hoffman Engineering, for $175 million in cash and the ...

  4. Rockwell International - Wikipedia

    en.wikipedia.org/wiki/Rockwell_International

    In 1966, Rockwell invented the world's first power miter saw. In 1981, Rockwell's power tool group was acquired by Pentair and re-branded Delta Machinery. Pentair's Tools group was acquired by Black & Decker in 2005. [5] Since 2011, Delta has been a subsidiary of Chang Type Industrial Co., Ltd. of China.

  5. Relief valve - Wikipedia

    en.wikipedia.org/wiki/Relief_valve

    A relief valve DN25 on cooling water pipe from heat exchanger Schematic diagram of a conventional spring-loaded pressure relief valve. A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; excessive pressure might otherwise build up and create a process upset, instrument or equipment failure, explosion, or fire.

  6. Proportional–integral–derivative controller - Wikipedia

    en.wikipedia.org/wiki/Proportional–integral...

    Tuning a control loop is the adjustment of its control parameters (proportional band/gain, integral gain/reset, derivative gain/rate) to the optimum values for the desired control response. Stability (no unbounded oscillation) is a basic requirement, but beyond that, different systems have different behavior, different applications have ...

  7. Getrag 420G transmission - Wikipedia

    en.wikipedia.org/wiki/Getrag_420G_transmission

    The 420G is a 6-speed manual transmission manufactured by Getrag.It is designed for longitudinal engine applications and for use on engines producing up to 499 N⋅m (368 lb⋅ft) of torque.