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Class Information
Number: 123/37.88
Name: Internal-combustion engines >
Description:

Sub-classes under this class:

Class Number	Class Name	Patents
123/	Oil engines	0
123/	Double-acting	0
123/	Starting device	0
123/142.5R	With heating means	207
123/143R	Igniters	29
123/179.1	Starting device	102
123/184.21	Intake manifold	264
123/188.1	Valve	23
123/18R	Oscillating piston	64
123/19	Liquid piston	16
123/192.1	Vibration compensating device	178
123/193.1	Particular piston and enclosing cylinder construction	51
123/195R	Frame construction	379
123/196R	Lubricators	895
123/197.1	Transmission mechanism from piston	150
123/198R	Accessories	206
123/1R	Miscellaneous	59
123/2	Combined devices	124
123/200	Rotary	23
123/21	Convertible cycle	49
123/22	Internal combustion and air	3
123/23	Solid fuel	74
123/24R	Gunpowder	9
123/250	Engine means having internal vaporizing in prechamber with all combustion in main chamber	12
123/253	Precombustion and main combustion chambers in series	20
123/25R	Water and hydrocarbon	100
123/26	Additional air supply	77
123/27R	Burning by highly compressed air	55
123/294	Combustion chamber means having fuel injection only	92
123/306	Means to whirl fluid before, upon, or after entry into combustion chamber	293
123/310	Combustion chamber having multiple spark gaps	87
123/311	Four-cycle	32
123/319	Engine speed regulator	69
123/37	Multiple explosion	13
123/38	Atmospheric	0
123/39	Noncompression	13
123/406.11	Spark ignition timing control	28
123/41.01	Cooling	117
123/41.86	Crankcase ventilation	107
123/41R	Reversible	15
123/42	Oscillating cylinder	25
123/429	Combustion chamber means combined with air-fuel mixture forming means	12
123/434	Charge forming device (e.g., pollution control)	72
123/43R	Rotating cylinder	48
123/45R	Rotary reciprocating piston	27
123/46R	Free piston	144
123/47R	Valved piston	21
123/48R	Adjustable combustion chamber	66
123/50R	Reciprocating cylinder	15
123/51R	Multiple piston, common nonrestrictive combustion chamber	39
123/52.1	Multiple cylinder	15
123/594	High tension ignition system	31
123/64	Six-cycle	41
123/657	Combustion chamber	27
123/65R	Two-cycle	76
123/90.1	Poppet valve operating mechanism	33
123/DIG.1	Interchangeable	18
123/DIG.10	Fluidic amplifier fuel control	11
123/DIG.11	Antidieseling (stopping)	71
123/DIG.12	Hydrogen	220
123/DIG.13	Gas	4
123/DIG.2	Accumulated fuel return to tank or engine-induction system	12
123/DIG.3	Model	28
123/DIG.4	Stratification	27
123/DIG.5	Crankcase pressure-operated pumps	31
123/DIG.6	Detachable	18
123/DIG.7	Convertible	43
123/DIG.8	Multiple engine units	46
123/DIG.9	Flame ignition	10