Hugo Lentz (1859–1944) was an Austrian mechanical engineer, born in South Africa.[1] He was the inventor of many award winning improvements to the steam engine.

The correct spelling of his name is Lenz but it has been Anglicised to Lentz in English-speaking countries.

Life and career

Lentz was born on 21 July 1859 in South Africa. When he was six years old his father died and the family returned to relatives in Germany. He became a Prussian marine engineer.[2]

He won the grand prize at the Exposition Universelle (1900) in Paris and is best known for his steam valve gear with oscillating and rotating cams to actuate poppet valves. He also developed an eponymous form of locomotive boiler, the Lentz boiler, with a corrugated tubular furnace.[3]

Paxman-Lentz single-cylinder engine

From 1907 Davey, Paxman & Co,[4] and later the Erie City Iron Works in Pennsylvania, built Lentz's steam engines.

He died on 21 March 1944.


  1. ^ Continental engineers at Accessed on 21 Feb 2013.
  2. ^ Paxman-Lentz Steam Engines at Accessed on 21 Feb 2013.
  3. ^  
  4. ^ History of Paxman's Ownership and Corporate Identity at Accessed on 21 Feb 2013.

External links

  • A History of Lentz Valve Gear on British Steam Locomotives