Patent Page

Joyner Double-Acting Tandem

| January 2006

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    Lanson Joyner’s 1918 patent shows the double-acting tandem’s basic layout. A single camshaft running on roller lifters operated both intake and exhaust valves.

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Gas Engine Patents of Note

The mechanical ingenuity of machinists and engineers has driven design innovation since the infancy of the internal combustion engine. And while that same ingenuity continues unabated today, yesterday's engineers had a smaller pool of accepted knowledge and practice from which to draw, making their innovations that much more singular.

Take, for instance, the work of Lanson Joyner, a Louisiana-based engineer who set out to craft the perfect double-acting tandem engine.

In this 1918 patent, Joyner laid claim to designing a practical, reliable and durable double-acting tandem engine, made so, he claimed, by his unique application of water cooling.



Water cooling was certainly nothing new in 1918, but Joyner's designed use of it was. Not content with simply supplying water-cooled jacketing to the cylinders, Joyner's design incorporated a unique system whereby cooling water was circulated through a channel in the engine's connecting rod and cavities in the pistons.

The 1918 patent appears to be Joyner's first stab at this approach to cooling: A second version was patented in 1921.



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