CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES

Introduced: September 1968

Classification Context

Section:: MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:: MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
Subclass:: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES

Description

F01L encompasses cyclically operating valves that control fluid flow in reciprocating or rotary machines and engines through periodic opening and closing actions synchronized with machine operation. This subclass includes intake and exhaust valves for internal combustion engines, steam engine valves, and analogous valve mechanisms in compressors and pumps. The classification covers valve actuating mechanisms, timing systems, and related hardware designed for timed, repetitive operation rather than continuous modulation. Related valve technologies for non-cyclic applications are classified elsewhere, such as in F16K for general valve construction.

18 direct subcodes

Child Classifications

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F01L 1/00 Valve-gear or valve arrangements, e.g. lift-valve gear
F01L 11/00 Valve arrangements in working piston or piston-rod
F01L 13/00 Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
F01L 15/00 Valve-gear or valve arrangements, e.g. with reciprocatory slide valves, other than provided for in groups
F01L 17/00 Slide-valve gear or valve arrangements with cylindrical, sleeve, or part-annularly-shaped valves surrounding working cylinder or piston
F01L 19/00 Slide-valve gear or valve arrangements with reciprocatory and other movement of same valve, other than provided for in group , e.g. longitudinally and in cross direction of working cylinder
F01L 21/00 Use of working pistons or piston-rods as fluid-distributing valves or as valve-supporting elements, e.g. in free-piston machines
F01L 23/00 Valves controlled by impact of piston, e.g. in free-piston machines
F01L 25/00 Drive, or adjustment during operation, of distribution or expansion valves by non-mechanical means
F01L 27/00 Distribution or expansion-valve gear peculiar to free-piston machines or engines and not provided for in groups
F01L 29/00 Reversing-gear
F01L 3/00 Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
F01L 31/00 Valve drive, valve adjustment during operation, or other valve control, not provided for in groups
F01L 33/00 Rotary or oscillatory slide-valve gear or valve arrangements, specially adapted for machines or engines with variable fluid distribution
F01L 35/00 Lift-valve gear or valve arrangements specially adapted for machines or engines with variable fluid distribution
F01L 5/00 Slide-valve gear or valve arrangements
F01L 7/00 Rotary or oscillatory slide-valve gear or valve arrangements
F01L 9/00 Valve-gear or valve arrangements actuated non-mechanically