LandOfFree - US Patents - Listing for Internal-combustion engines,Four-cycle

Internal-combustion engines – Four-cycle – Multiple exhaust

Multiple-valve internal combustion engine

Internal-combustion engines – Four-cycle – Rotating valve

Non-throttling control apparatus for spark ignition internal com

Internal-combustion engines – Four-cycle – Variable clearance

Oiling systems and methods for changing lengths of variable...

Internal-combustion engines – Four-cycle – Having subcharger associated with the cylinder

Otto-cycle engine

Internal-combustion engines – Four-cycle – Rotating valve

Parallel inherently balanced rotary valve internal combustion en

Internal-combustion engines – Four-cycle – Single poppet valve

Partitioned poppet valve mechanism seprating inlet and exhaust t

Internal-combustion engines – Four-cycle – Variable clearance

Piston and spring powered engine

Internal-combustion engines – Four-cycle – Rear compression of air or combustible mixture to be...

Piston engine

Internal-combustion engines – Four-cycle – Variable clearance

Piston-type internal combustion engine

Internal-combustion engines – Four-cycle – Variable clearance

Piston-type internal combustion engine

Internal-combustion engines – Four-cycle – Single poppet valve

Poppet valve and engine using same

Internal-combustion engines – Four-cycle – Single poppet valve

Poppet valve and engine using same

Internal-combustion engines – Four-cycle – Single poppet valve

Poppet valve assembly with apertures

Internal-combustion engines – Four-cycle – Variable clearance

Pressure-responsive variable length connecting rod

Internal-combustion engines – Four-cycle – Rotating valve

Process and apparatus for controlling a gas evacuation circuit o

Internal-combustion engines – Four-cycle – Crankcase compression of air or combustible mixture to be...

Pulse charger

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Reciprocating engine

Internal-combustion engines – Four-cycle – Variable clearance

Internal-combustion engines – Four-cycle

Reciprocating engine of a spark ignition type

Internal-combustion engines – Four-cycle – Variable clearance

Reciprocating internal combustion engine