New York private equity firm Kohlberg Kravis Roberts & Co. has offered about $3.68 billion for industrial equipment maker Gardner Denver Inc., according to Bloomberg. KKR (NYSE: KKR) offered $75 a share, an 11 percent premium to Gardner Denver’s (NYSE: GDI) closing price on Thursday of $67.47 a share, Bloomberg reported, citing an unnamed source. Wayne, Pa.-based Gardner Denver (GDI) received takeover interest from at least eight companies since October and hired Goldman Sachs Group Inc. to review…