(0)F01L:0/3:
IPC6
SECTION F - MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS;BLASTING
CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
F01L
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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)
 

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/ 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)

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/ 02 • Valve drive (transmitting-gear between valve drive and valve F 01 L 1/12)  

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/ 04 • • by means of cams, camshafts, cam discs, eccentrics, or the like (F 01 L 1/10 takes precedence)  

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/ 047 • • • Camshafts [6]  

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/ 053 • • • • overhead type [6]  

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/ 06 • • • 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  

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/ 08 • • • Shape of cams  

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/ 10 • • by means of crank- or eccentric-driven rods  

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/ 12 • Transmitting-gear between valve drive and valve (simultaneously operating two or more valves F 01 L 1/26)  

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/ 14 • • Tappets; Push-rods  

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/ 16 • • • Silencing impact; Reducing wear  

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/ 18 • • Rocking arms or levers  

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/ 20 • Adjusting or compensating clearance, i.e. lash adjustment  

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/ 22 • • automatically  

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/ 24 • • • by fluid means, e.g. hydraulically  

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/ 245 • • • • Hydraulic tappets [6]  

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/ 25 • • • • • between cam and valve stem [6]  

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/ 255 • • • • • between cam and rocker arm [6]  

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/ 26 • 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)  

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/ 28 • characterised by the provision of coaxial valves; characterised by the provision of valves co-operating with both intake and exhaust ports  

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/ 30 • characterised by the provision of positively opened and closed valves, i.e. desmodromic valves  

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/ 32 • characterised by the provision of means for rotating lift valves, e.g. to diminish wear  

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/ 34 • characterised by the provision of means for changing the timing of the valves without changing the duration of opening  

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/ 344 • • changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear [6]  

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/ 348 • • • by means acting on timing belts or chains [6]  

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/ 352 • • • using bevel or epicyclic gear [6]  

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/ 356 • • • making the angular relationship oscillate [6]  

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/ 36 • peculiar to machines or engines of specific type other than four-stroke cycle  

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/ 38 • • 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)  

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/ 40 • • for engines with scavenging charge near top dead-centre position, e.g. by overlapping inlet and exhaust time (scavenging aspects F 02 B)  

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/ 42 • • for machines or engines characterised by cylinder arrangement, e.g. star or fan  

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/ 44 • Multiple-valve gear or arrangements, not provided for in preceding subgroups, e.g. with lift and different valves  

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/ 46 • Component parts, details, or accessories, not provided for in preceding subgroups  
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