US 11,655,756 B2
Single air supply using hollow piston rod
Shaul Haim Yaakoby, Alsdorf (DE)
Assigned to AQUARIUS ENGINES (A.M.) LTD., Rosh Haayin (IL)
Filed by Aquarius Engines (A.M.) Ltd., Yakum (IL)
Filed on May 4, 2022, as Appl. No. 17/661,937.
Application 17/661,937 is a continuation of application No. 17/195,818, filed on Mar. 9, 2021, granted, now 11,346,279.
Application 17/195,818 is a continuation of application No. 16/831,920, filed on Mar. 27, 2020, granted, now 10,968,821, issued on Apr. 6, 2021.
Application 16/831,920 is a continuation of application No. 16/207,479, filed on Dec. 3, 2018, granted, now 10,641,166, issued on May 5, 2020.
Prior Publication US 2022/0260011 A1, Aug. 18, 2022
Int. Cl. F02B 71/00 (2006.01); F16J 1/12 (2006.01); F16J 7/00 (2006.01)
CPC F02B 71/00 (2013.01) [F16J 1/12 (2013.01); F16J 7/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A linear reciprocating engine, comprising:
a cylinder having a first combustion chamber at a first end and a second combustion chamber at an opposing second end;
a first cylinder head located at an end of the first combustion chamber; a second cylinder head located at an end of the second combustion chamber;
a vestibule located external to the first combustion chamber and proximate to the first end;
a piston slidably mounted within the cylinder; and
a piston rod including a first piston rod portion extending through the first combustion chamber and a second piston rod portion extending through the second combustion chamber, the first piston rod portion having an inlet port and at least one first sidewall opening located on a first side of the piston, and the second piston rod portion having at least one second sidewall opening located on a second side of the piston, opposite the first side of the piston,
wherein the piston rod includes a passageway configured to communicate gas flow between the first piston rod portion and the second piston rod portion,
wherein the piston rod is configured such that during a first stroke portion, the inlet port or the at least one first sidewall opening is located in the vestibule to supply the second combustion chamber with air from the vestibule, and during a second stroke portion, the inlet port is located in the vestibule to supply the first combustion chamber with air from the vestibule.