IPC 6 English version F01L !A-F01L 35/04

F01L-F01L03504

SECTION F– MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F 01

MACHINES OR ENGINES IN GENERAL (combustion engines F 02; machines for liquids F 03, F 04); ENGINE PLANTS IN GENERAL; STEAM ENGINES

F 01 L

CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES (valves in general F 16 K)

Notes

(1)

Attention is drawn to the Notes preceding class F 01, especially Note (3).

(2)

As regards the above-mentioned Note (3), attention is drawn to F 01 B 3/10, F 01 B 15/06, F 01 C 21/12, F 02 B 53/06, F 03 C 1/08, F 04 B 1/18, F 04 B 7/00, F 04 B 39/08, F 04 B 39/10, and F 04 C 15/02, F 04 C 29/08.

Valve-gear for internal-combustion piston engines or for other machines or engines with positive working-fluid displacement (valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution F 01 L 15/00 to F 01 L 35/00)

Valve-gear or valve arrangements, e.g. lift-valve gear (lift valve and valve seat assemblies per se F 01 L 3/00; slide-valve gear F 01 L 5/00; actuated non-mechanically F 01 L 9/00; valve arrangements in working piston or piston-rod F 01 L 11/00; modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations F 01 L 13/00)

Valve drive (transmitting-gear between valve drive and valve F 01 L 1/12)

by means of cams, camshafts, cam discs, eccentrics, or the like (F 01 L 1/10 takes precedence)

047

Camshafts [6]

053

overhead type [6]

the cams, or the like, rotating at a higher speed than that corresponding to the valve cycle, e.g. operating four-stroke engine valves directly from crankshaft

Shape of cams

by means of crank- or eccentric-driven rods

Transmitting-gear between valve drive and valve (simultaneously operating two or more valves F 01 L 1/26)

Tappets; Push-rods

Silencing impact; Reducing wear

Rocking arms or levers

Adjusting or compensating clearance, i.e. lash adjustment

automatically

by fluid means, e.g. hydraulically

245

Hydraulic tappets [6]

between cam and valve stem [6]

255

between cam and rocker arm [6]

characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift valves per cylinder (with coaxial valves F 01 L 1/28)

characterised by the provision of coaxial valves; characterised by the provision of valves co-operating with both intake and exhaust ports

characterised by the provision of positively opened and closed valves, i.e. desmodromic valves

characterised by the provision of means for rotating lift valves, e.g. to diminish wear

characterised by the provision of means for changing the timing of the valves without changing the duration of opening

344

changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear [6]

348

by means acting on timing belts or chains [6]

352

using bevel or epicyclic gear [6]

356

making the angular relationship oscillate [6]

peculiar to machines or engines of specific type other than four-stroke cycle

for engines with other than four-stroke cycle, e.g. with two-stroke cycle (F 01 L 1/26, F 01 L 1/28 take precedence)

for engines with scavenging charge near top dead-centre position, e.g. by overlapping inlet and exhaust time (scavenging aspects F 02 B)

for machines or engines characterised by cylinder arrangement, e.g. star or fan

Multiple-valve gear or arrangements, not provided for in preceding subgroups, e.g. with lift and different valves

Component parts, details, or accessories, not provided for in preceding subgroups

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

Selecting particular materials for valve members or valve seats; Valve members or valve seats composed of two or more materials

Coated valve members or valve seats

Valve members or valve seats with means for guiding or deflecting the medium controlled thereby, e.g. producing a rotary motion of the drawn-in cylinder charge (for rotating lift valves F 01 L 1/32)

Valve guides; Sealing of valve stem, e.g. sealing by lubricant

Connecting springs to valve members

Cooling of valves

by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve

by means of a fluid flowing through or along valve, e.g. air (for sealing only F 01 L 3/08)

Liquid cooling of valve

Shapes or constructions of valve members, not provided for in preceding subgroups of this group

Valve seats not provided for in preceding subgroups of this group; Fixing of valve seats

Safety means or accessories, not provided for in preceding subgroups of this group

Slide-valve gear or valve arrangements (with pure rotary or oscillatory movement F 01 L 7/00)

with other than cylindrical, sleeve, or part-annularly-shaped valves, e.g. with flat-type valves

with cylindrical, sleeve, or part-annularly-shaped valves

surrounding working cylinder or piston

Arrangements with several movements or several valves, e.g. one valve inside the other (with part-annularly-shaped valves F 01 L 5/12)

with reciprocating and other movement of same valve

Arrangements with part-annularly-shaped valves

characterised by the provision of valves with reciprocating and other movements (surrounding working cylinder or piston F 01 L 5/06)

with reciprocating and other movement of same valve, e.g. longitudinally and in cross direction of working cylinder

with reciprocatory valve and other slide valve

specially for two-stroke engines (F 01 L 5/06, F 01 L 5/14 take precedence)

Multiple-valve arrangements (with valves surrounding working cylinder or piston F 01 L 5/06; with reciprocatory and other slide valves F 01 L 5/18; specially for two-stroke engines F 01 L 5/20)

Component parts, details, or accessories, not provided for in preceding subgroups of this group

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 F 01 L 5/00)

with cylindrical, sleeve, or part-annularly-shaped valves (of disc type F 01 L 7/06; of conical type F 01 L 7/08)

surrounding working cylinder or piston

with disc-type valves

with conically- or frusto-conically-shaped valves

with valves of other specific shape, e.g. spherical

specially for two-stroke engines (F 01 L 7/04 takes precedence)

Multiple-valve arrangements (with valves surrounding working cylinder or piston F 01 L 7/04; specially for two-stroke engines F 01 L 7/12)

Sealing or packing arrangements specially therefor

Component parts, details, or accessories, not provided for in preceding subgroups of this group

Valve-gear or valve arrangements actuated non-mechanically

by fluid means, e.g. hydraulic

by electric means

11/

Valve arrangements in working piston or piston-rod

11/

in piston

11/

operated by movement of connecting-rod

11/

operating oscillatory valve

13/

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

13/

for reversing

13/

for starting by means of fluid pressure

13/

for braking

13/

for decompression, e.g. during starting; for changing compression ratio

Valve-gear or valve arrangements, e.g. with reciprocatory slide valves, specially for steam engines, or specially for other machines or engines with variable working-fluid distribution

Notes

(1)

Groups F 01 L 15/00 to F 01 L 31/00 cover:

–

valve drive or means external to valves for adjustment during operation;

–

tripping-gear;

–

reversing-gear;

–

use of pistons or piston-rods as valves or as valve-supporting elements;

–

valve-gear or valve arrangements peculiar to free-piston machines or engines.

(2)

Groups F 01 L 15/00 to F 01 L 31/00 do not fully cover subject matter restricted to rotary, oscillatory, or lift-valve gear or valve arrangements, which is covered by group F 01 L 33/00 or F 01 L 35/00.

15/

Valve-gear or valve arrangements, e.g. with reciprocatory slide valves, other than provided for in groups F 01 L 17/00 to F 01 L 29/00 (valve drive or external valve-adjustment during operation, see the relevant groups, e.g. F 01 L 31/00; tripping-gear or tripping of valves F 01 L 31/00)

15/

with valves other than cylindrical, sleeve, or part-annularly-shaped, e.g. flat D-valves

15/

main valve being combined with auxiliary valve (of drag-valve type F 01 L 15/10)

15/

of Meyer or Rider type, i.e. in which the expansion is varied at the expansion valve itself

15/

with cylindrical, sleeve, or part-annularly-shaped valves; Such main valves combined with auxiliary valves

15/

with main slide valve and auxiliary valve dragged thereby

15/

characterised by having means for effecting pressure equilibrium between two different cylinder spaces at idling

15/

Arrangements with several co-operating main valves, e.g. reciprocatory and rotary

15/

with reciprocatory slide valves only

15/

Valve arrangements not provided for in preceding subgroups of this group

15/

Component parts, details, or accessories, not provided for in preceding subgroups of this group

17/

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

17/

Drive, or adjustment during operation, peculiar thereto, e.g. for reciprocating and oscillating movements or for several valves one inside the other

19/

Slide-valve gear or valve arrangements with reciprocatory and other movement of same valve, other than provided for in group F 01 L 17/00, e.g. longitudinally and in cross direction of working cylinder

19/

Drive, or adjustment during operation, peculiar thereto

21/

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

21/

Piston or piston-rod used as valve member

21/

Valves arranged in or on piston or piston-rod

23/

Valves controlled by impact of piston, e.g. in free-piston machines

25/

Drive, or adjustment during operation, of distribution or expansion valves by non-mechanical means

25/

by fluid means

25/

by working fluid of machine or engine, e.g. free-piston machine

25/

Arrangements with main and auxiliary valves, at least one of them being fluid-driven

25/

by electric or magnetic means

27/

Distribution or expansion-valve gear peculiar to free-piston machines or engines and not provided for in groups F 01 L 21/00 to F 01 L 25/00

27/

the machine or engine having rotary or oscillatory valves

27/

Delayed-action controls, e.g. of cataract- or dash-pot-type

29/

Reversing-gear (equally usable for control of degree of working fluid admission, and reversing being of secondary importance F 01 L 31/00)

29/

by displacing eccentric

29/

by links or guide rods

29/

by interchanging inlet and exhaust ports

29/

specially for rotary or oscillatory valves

29/

Details, e.g. drive

29/

Powered reverse gear

31/

Valve drive, valve adjustment during operation, or other valve control, not provided for in groups F 01 L 15/00 to F 01 L 29/00 (sensing elements measuring the variable or condition to be controlled or regulated F 01 B)

31/

with tripping-gear (for oscillatory valves F 01 L 31/06); Tripping of valves

31/

with positively-driven trip levers

31/

with tripping-gear specially for oscillatory valves; Oscillatory tripping-valves, e.g. of Corliss type

31/

Valve drive or valve adjustment, apart from tripping aspects; Positively-driven gear

31/

the drive being effected by eccentrics (F 01 L 31/14 takes precedence)

31/

Valve adjustment by displacing eccentric

31/

Valve adjustment by links or guide rods, e.g. in valve-gears with eccentric drive

31/

the drive being effected by specific means other than eccentric, e.g. cams; Valve adjustment in connection with such drives

31/

specially for rotary or oscillatory valves

31/

Valve adjustment

31/

specially for lift valves

31/

Valve adjustment

Rotary or oscillatory slide-valve gear or lift-valve gear or such valve arrangements specially for steam engines or specially for other machines or engines with variable working-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 F 01 L 15/00 to F 01 L 31/00)

33/

Rotary or oscillatory slide-valve gear or valve arrangements

33/

rotary

33/

oscillatory

35/

Lift-valve gear or valve arrangements

35/

Valves

35/

Arrangements of valves in the machine or engine, e.g. relative to working cylinder