Valve-gear or valve arrangements actuated non-mechanically
9
/
02
•
by fluid means, e.g. hydraulic
9
/
04
•
by electric means
11
/
00
Valve arrangements in working piston or piston-rod
11
/
02
•
in piston
11
/
04
•
•
operated by movement of connecting-rod
11
/
06
•
•
•
operating oscillatory valve
13
/
00
Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
13
/
02
•
for reversing
13
/
04
•
for starting by means of fluid pressure
13
/
06
•
for braking
13
/
08
•
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
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
/
00
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
/
02
•
with valves other than cylindrical, sleeve, or part-annularly-shaped, e.g. flat D-valves
15
/
04
•
•
main valve being combined with auxiliary valve (of drag-valve type F 01 L 15/10)
15
/
06
•
•
•
of Meyer or Rider type, i.e. in which the expansion is varied at the expansion valve itself
15
/
08
•
with cylindrical, sleeve, or part-annularly-shaped valves; Such main valves combined with auxiliary valves
15
/
10
•
with main slide valve and auxiliary valve dragged thereby
15
/
12
•
characterised by having means for effecting pressure equilibrium between two different cylinder spaces at idling
15
/
14
•
Arrangements with several co-operating main valves, e.g. reciprocatory and rotary
15
/
16
•
•
with reciprocatory slide valves only
15
/
18
•
Valve arrangements not provided for in preceding subgroups of this group
15
/
20
•
Component parts, details, or accessories, not provided for in preceding subgroups of this group
17
/
00
Slide-valve gear or valve arrangements with cylindrical, sleeve, or part-annularly-shaped valves surrounding working cylinder or piston
17
/
02
•
Drive, or adjustment during operation, peculiar thereto, e.g. for reciprocating and oscillating movements or for several valves one inside the other
19
/
00
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
/
02
•
Drive, or adjustment during operation, peculiar thereto
21
/
00
Use of working pistons or piston-rods as fluid-distributing valves or as valve-supporting elements, e.g. in free-piston machines
21
/
02
•
Piston or piston-rod used as valve member
21
/
04
•
Valves arranged in or on piston or piston-rod
23
/
00
Valves controlled by impact of piston, e.g. in free-piston machines
25
/
00
Drive, or adjustment during operation, of distribution or expansion valves by non-mechanical means
25
/
02
•
by fluid means
25
/
04
•
•
by working fluid of machine or engine, e.g. free-piston machine
25
/
06
•
•
•
Arrangements with main and auxiliary valves, at least one of them being fluid-driven
