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CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES (valves in general F16K)
Definition statement
This subclass/group covers:

Valve-gear or valve arrangements, e.g. lift-valve gear;

Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces;

Slide valve-gear or valve-arrangements;

Valve-gear or valve arrangements actuated non-mechanically;

Valve arrangements in working piston or piston-rod;

Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations;

Valve-gear or valve arrangements, e.g. with reciprocatory slide valves, other than provided for in groups;

Slide valve-gear or valve arrangements with cylindrical, sleeve, or part annularly-shaped valves surrounding working cylinder or piston;

Slide valve-gear or valve arrangements with reciprocatory and other movement of same valve, e.g. longitudinally of working cylinder and in cross direction

Use of working pistons or pistons-rods as fluid-distributing valves or a valve-supporting elements, e.g. in free-piston machines

Valves controlled by impact by piston, e.g. in free-piston machines; Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means;

Distribution or expansion valve-gear peculiar to free-piston machines or engines;

Reversing gear Valve drive, valve adjustment during operation;

Rotary or oscillatory slide valve-gear or valve arrangements, specially adapted for machines or engines with variable fluid distribution;

Lift valve-gear or valve arrangements specially adapted for machines or engines with variable fluid distribution

Valve-gear or valve arrangements, e.g. lift-valve gear (lift-valve and valve-seat assemblies per se F01L 3/00; slide-valve gear F01L 5/00; actuated non-mechanically F01L 9/00; valve arrangements in working piston or piston rod F01L 11/00; modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations F01L 13/00 )
Definition statement
This subclass/group covers:

Valve-gear or valve arrangements, e.g. lift-valve gear

References relevant to classification in this group
This subclass/group does not cover:
Valve arrangements in general
Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution
Informative references
Attention is drawn to the following places, which may be of interest for search:
Lift-valve and valve-seat assemblies per se
Slide-valve gear
Actuated non-mechanically
Valve arrangements in working piston or piston rod
Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
Valve drive (transmitting-gear between valve drive and valve F01L 1/12 )
Informative references
Attention is drawn to the following places, which may be of interest for search:
Auxiliary apparatus of engines driven by means of chains, belts or like endless members:
Safety means relating to endless members:
Driving belts, driving chains:
Gearings for conveying rotary motion by endless flexible members:
Camshaft drives indexed according to their transmission means -chain, belt, gear wheel:
Means for tensioning:
Transmitting-gear between valve drive and valve
Camshafts
Informative references
Attention is drawn to the following places, which may be of interest for search:
Manufacturing by shaping with fluid pressure
B21D26/02H
Manufacturing camshafts
Machining camshafts
Connecting cams to shaft
By expanding and then shrinking
Using pressure fluids
Using heat or cold
Grinding
Lubrication of camshaft bearings
Rigidly coupling two coaxial shafts involving plastic deformation
Camshafts with single track cams
Characterised by their construction
Lift-valve, 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
References relevant to classification in this group
This subclass/group does not cover:
Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution
Valves for specific use as Exhaust Gas Recirculation valves (EGR valves) s
Informative references
Attention is drawn to the following places, which may be of interest for search:
Finishing, reconditioning valves:
Making poppet valves:
Slide valve-gear or valve-arrangements (with pure rotary or oscillatory movement F01L 7/00 )
References relevant to classification in this group
This subclass/group does not cover:
Valve-arrangements with pure rotary or oscillatory movement
Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution
Rotary or oscillatory slide valve-gear or valve arrangements (slide valves with combined rotary and non-rotary movements, combinations of rotary and non-rotary slide valves F01L 5/00 )
References relevant to classification in this group
This subclass/group does not cover:
Slide valves with combined rotary and non-rotary movements, combinations of rotary and non-rotary slide valves
Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution
Informative references
Attention is drawn to the following places, which may be of interest for search:
Rotary valve drives:
Valve-gear or valve arrangements actuated non-mechanically
References relevant to classification in this group
This subclass/group does not cover:
Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution
Valve arrangements in working piston or piston-rod
References relevant to classification in this group
This subclass/group does not cover:
Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution
Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
References relevant to classification in this group
This subclass/group does not cover:
Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution
Methods of controlling engine output power by varying valve lift and timing of inlet resp. exhaust valve(s), for which the emphasis is not on the structure of the valve gear used
Informative references
Attention is drawn to the following places, which may be of interest for search:
Controlling engine output power by varying valve lift and timing of inlet resp. exhaust valve(s):
Internal EGR
[N: Deactivating valves]
Definition statement
This subclass/group covers:

The structure of the valve gear to permit in use valve deactivation.

References relevant to classification in this group
This subclass/group does not cover:
Methods of controlling engines by rendering engine inoperative or idling or by cutting out individual cylinders, for which the emphasis is not on the structure of the valve gear used
Cutting-out
Inoperative or idling
for braking
Informative references
Attention is drawn to the following places, which may be of interest for search:
Engine brake with retarder:
Control of engine for using engine as brake:
Control of valve gear for switching to compressor action for braking:
Braking being exclusively produced by compression in the cylinders:
In cooperation with vehicle transmission or brakes:
Valve-gear or valve arrangements, e.g. with reciprocatory slide valves, other than provided for in groups F01L 17/00 to F01L 29/00 (valve drive or external valve-adjustment during operation, see the relevant groups, e.g. F01L 31/00; tripping-gear or tripping of valves F01L 31/00 )
Slide valve-gear or valve arrangements with cylindrical, sleeve, or part annularly-shaped valves surrounding working cylinder or piston
Slide valve-gear or valve arrangements with reciprocatory and other movement of same valve, other than provided for in F01L 17/00, e.g. longitudinally of working cylinder and in cross direction
Use of working pistons or pistons-rods as fluid-distributing valves or a valve-supporting elements, e.g. in free-piston machines
Valves controlled by impact by piston, e.g. in free-piston machines; [N: F01L 25/063 takes precedence]
Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means
Distribution or expansion valve-gear peculiar to free-piston machines or engines and not provided for in F01L 21/00 to F01L 25/00
Definition statement
This subclass/group covers:

Distribution or expansion valve-gear peculiar to free-piston machines or engines and not provided for in F01L 21/00 to F01L 25/00

Reversing gear (equally usable for control of degree of working-fluid admission and reversing being of secondary-importance F01L 31/00)
Valve drive, valve adjustment during operation, or other valve control, not provided for in groups F01L 15/00 to F01L 29/00 (sensing elements measuring the variable or condition to be controlled or regulated F01B)
Rotary or oscillatory slide valve-gear or valve arrangements, specially adapted for machines or engines with variable fluid distribution (drive, adjustment during operation, tripping-gear, reversing-gear, use of working pistons or piston-rods as valves or as valve-supporting elements, valve-gear or valve arrangements peculiar to free-piston machines or engines F01L 15/00 to F01L 31/00)
Lift valve-gear or valve arrangements specially adapted for machines or engines with variable fluid distribution (drive, adjustment during operation, tripping-gear, reversing-gear, use of working pistons or piston-rods as valves or as valve-supporting elements, valve-gear or valve arrangements peculiar to free-piston machines or engines F01L 15/00 to F01L 31/00)
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Last Modified: 10/11/2013