ent ▁for ▁his ▁“ cou pling ▁for ▁precise ▁angular ▁transmission ▁of ▁rot ational ▁motion ” ▁at ▁the ▁Mun ich , ▁Germany , ▁pat ent ▁office . ▁The ▁company ▁S CH M ID T - K UP PL UN G ▁GmbH ▁was ▁established ▁in ▁ 1 9 6 5 ▁by ▁Richard ▁Schmidt ▁and ▁Walter ▁Ha arm ann ▁to ▁sell ▁the ▁soon - to - be - pat ented ▁Schmidt ▁coupling . ▁The ▁pat ent ▁for ▁the ▁Schmidt ▁coupling , ▁as ▁it ▁came ▁to ▁be ▁known , ▁was ▁granted ▁in ▁February ▁ 1 9 6 7 . ▁Schmidt ▁cou pl ings ▁entered ▁the ▁United ▁States ▁coupling ▁market ▁place ▁in ▁ 1 9 8 4 ▁when ▁Zero - Max , ▁Inc . ▁acquired ▁Schmidt ▁Cou pl ings , ▁Inc . ▁S CH M ID T - K UP PL UN G ▁GmbH ▁has ▁entered ▁the ▁Indian ▁market ▁through ▁their ▁channel ▁partner ▁M / s . ▁R SV ▁Indust ries ▁Private ▁Limited ▁located ▁in ▁M umb ai , Ind ia . ▁ ▁Operation ▁▁ ▁In ▁operation , ▁all ▁three ▁disc s ▁of ▁a ▁Schmidt ▁coupling ▁rotate ▁with ▁equal ▁velocity . ▁The ▁bearing - mount ed ▁connections ▁of ▁links ▁to ▁disc s ▁are ▁spac ed ▁ 1 2 0 ° ▁apart ▁on ▁same - d iam eter ▁pitch ▁circles . ▁The ▁distance ▁between ▁the ▁sh aft s ▁can ▁be ▁varied ▁ste pl ess ly ▁between ▁the ▁minimum ▁value ▁and ▁a ▁maximum ▁of ▁twice ▁the ▁length ▁of ▁the ▁links . ▁While ▁the ▁coupling ▁is ▁und ulating , ▁there ▁is