previously k rting brothers ag is a long standing industrial engineering company in hanover . at the end of the 19th and beginning of the 20th century the company played a leading role in the development of injector pumps in germany and europe . k rting still produces pump and pump based vacuum technology but also industrial burners and machinery related to thermal and chemical purification transformation processes contents 1 history 2 the k rting double acting gas engine 3 other k rting engines 4 references 5 literature history edit the k rting brothers company was founded in hanover on november 1 1871 by the brothers berthold and ernst k rting . the brothers rented a small office a small space in the backyard of the present day 13 joachimstrasse near hanover central station . berthold took charge of the commercial side while ernst specialized in the technical side . the brothers started successfully with the development and patenting of one of the first functioning injectors . in the beginning only two workmen were employed . due to the ever increasing orders in 1872 the company rented a factory on celler street in what is now the oststadt district . it consisted of two small buildings with a 12 horse power steam engine . it would employ 41 workers . the young enterprise produced injectors and jet pumps as well as the associated condensors . in 1874 the small factory was already supplying 2 000 devices . the enterprise grew quickly and in a few years established proxies in germany and neighboring european lands london paris milan genoa barcelona breslau wroc aw st. petersburg vienna and overseas philadelphia . the first foreign branch came into being as k rthing brothers in manchester . the american branch was opened in 1874 . in 1880 the company had 20 staff and 170 workers . the product line was expanded to central heaters gas scrubbers gas gasoline and diesel motors . k rting vacuum brakes could be found in many trains of the time . in 1920 k rting also built the first holzwarth gas turbine . in 1889 a new larger factory with a large foundry and a powerhouse would be erected in linden where the firm s headquarters has been to this day . a workers town with a school was built in the direct vicinity the so called k rtingsdorf . at its peak before the great depression k rting employed approximately 1 700 workers and 400 staff . the company was one of the biggest employers in the hanover region . in 1904 the fusch family entered the company through marriage . today the k rting company is in the fifth generation of k rting fusch family ownership . the product line was continually adjusted throughout the 20th century whereby the core competence flow devices ejector pumps nozzles and industrial burners became ever more sophisticated . in contrast the motor and turbine engineering declined and were ultimately abandoned . the k rting double acting gas engine edit in 1900 ernst k rting filed patents 1 2 for a novel design of gas engine . this engine had a single water cooled piston that was double acting i.e. the cylinder had combustion chambers at either end . as the engine was a 2 stroke this gave it continuous power strokes much as a double acting steam engine . the lack of continuous power strokes in internal combustion engines was perceived by those used to steam as having the potential for mechanical problems due to the intermittent power strokes . the k rting design was quite successful in a range of applications particularly large installations powered by blast furnace gas . the prototype 350bhp engine was tested in june 1900 and the results presented in the 1900 annual meeting of the verein von gas und wassefach m nnern . published by the german gas lighting journal and reproduced in the engineer . 3 this article states that a four stroke version of the double acting design was introduced two year before which also had both piston and rod cooled by water . k rting gas engine of around 1900 k rting gas engine of around 1900 other k rting engines edit although k rting were known for their unusual double acting two stroke they made a range of more conventional engines over a long period . the 1909 gross basenach experimental m iii airship was equipped with two k rting v8 engines . k rting engines initially paraffin engines and later diesel engines were used extensively in early german submarines . the 6 cylinder 2 stroke submarine engine was reviewed in the engineer magazine in august 1906 . 4 this utilised crankcase compression with the piston controlling all the ports . it was referred to as using petroleum though this was almost certainly the less volatile peraffin kerosene type as it had exhaust heaters for the carburetors and electric pre heating of both cylinders and vaporisers with the engine being turned over for some time by electrical power before being put to work . this allowing the engine to be started after 5 minutes . the engine was rated at 200bhp at 500rpm and two were installed per submarine . k rting straight 6 submarine engine 1906 k rting 8 sl 116 v8 engine for airships references edit improvements in or appertaining to internal combustion engines gb patent gb190011038 filed june 1900 1 internal combustion engine us patent us746342 filed august 1900 2 the koerting two cycle 350 brake horse power gas engine the engineer 4 january 1901 pp23 24 petroleum motor for submarines the engineer 3 august 1906 pp116 117 literature edit wolfgang leonhardt list und vahrenwald zwei pr gende stadtteile von hannover hamburg 2005 isbn 3 8334 3333 7 125 jahre k rting hannover history of k rting ag for the 125th anniversary 1996 authority control gnd 5291560 8 retrieved from https en.wikipedia.org w index.php title k rting hannover & oldid 702564086 categories companies based in hanoverengineering companies of germany1871 establishments in germanycompanies established in 1871hidden categories use dmy dates from january 2016wikipedia articles with gnd identifiers navigation menu 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