F22D   1/00		Ǯ㡥ͽǮ	Feed-water heaters, e.g. preheaters	4151
F22D   1/02		ϧɤޤϱƻ󤵤줿ɤĤΡΣ	with water tubes arranged in the boiler furnaces, fire tubes or flue ways	1781
F22D   1/04		ñʳ̤ͭɡ㡥ľĤ	the tubes having plain outer surfaces, e.g. in vertical arrangement	204
F22D   1/06		ʿĤ	in horizontal arrangement	286
F22D   1/08		̤˥ե󡤥֡ԡʤˡⲡʤͭɡ㡥ľĤ	the tubes having fins, ribs, gills, corrugations, or the like on their outer surfaces, e.g. in vertical arrangement	213
F22D   1/10		ʿĤΡΣ	in horizontal arrangement	228
F22D   1/12		֡㡥Ĵ	Control devices, e.g. for regulating steam temperature	465
F22D   1/14		֤ޤӵ֡Σ	Safety or venting devices	232
F22D   1/16		ϧɡƻʳ󤵤줿ɤˤ	with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways	401
F22D   1/18		ܲǮˤ	and heated indirectly	557
F22D   1/20		ܥľϢܤ줿	and directly connected to boilers	170
F22D   1/22		žưԤ	and provided for rotary movement	9
F22D   1/24		ƴǤɤޤϱƻˤ	with fire tubes or flue ways traversing feed-water vessels	388
F22D   1/26		ɰʳΡ太ӲǮΤʬΥʤˤΡ㡥ȢޤϱƻǤ줿ƻޤϴɤͭʤ緿Ǯ	with means, other than tubes, to separate water and heating medium, e.g. bulk heaters without internal flues or tubes, jacketted smoke-boxes or flues	121
F22D   1/28		ľǮãˤΡ㡥太Ӿκˤ	for direct heat transfer, e.g. by mixing water and steam	931
F22D   1/30		ޤι߲򵯤볬ʡġġߴľο¤ޤ¾μʤͭ	with stages, steps, baffles, dishes, circular troughs, or other means to cause interrupted or cascading fall of water	215
F22D   1/32		ˤǮˤΡ㡥ӥ󤫤Τ	arranged to be heated by steam, e.g. bled from turbines	3081
F22D   1/34		ܥ˼ȤȤ˶Žʪ᤹	and returning condensate to boiler with main feed supply	356
F22D   1/36		太ӶͽǮ	Water and air preheating systems	1246
F22D   1/38		太ӶͽǮι¤Ūħ	Constructional features of water and air preheating systems	231
F22D   1/40		ӾǳƥȤ߹蘆줿ͽǮΣ	Combinations of exhaust-steam and smoke-gas preheaters	113
F22D   1/42		ؼѤäŬ	specially adapted for locomotives	439
F22D   1/44		ǳƥͽǮ	Smoke-gas preheaters	36
F22D   1/46		ӾͽǮ	Exhaust-steam preheaters	40
F22D   1/48			Details	22
F22D   1/50		ǮŪæȰΤˤʤäΡľǮãǤæƣģˡΣ	incorporating thermal de-aeration of feed-water(de-aeration produced in the course of direct heat transfer <b>F22D1/28</b>)	5096
F22D   3/00		ͽǮѥ졼	Accumulators for preheated water	267
F22D   3/02		ǳƼ󤵤줿	arranged within combustion chambers	30
F22D   3/04		졼Ȥ߹蘆줿	combined with steam accumulators	134
F22D   3/06		ܥľϢ뤷	directly connected to boilers	109
F22D   3/08		ؼѤäŬΡΣ	specially adapted for locomotives	16
F22D   3/10		֡Σ	Control devices	25
F22D   5/00		ޤϿ̤桨ưŪʵޤϿ̤Ĵ֡Σ	Controlling water feed or water level; Automatic water feeding or water-level regulators	1377
F22D   5/02		ư̤ˤä椵롤ڤ򵡳Ūư塤夬ϤˤäήФֻڤ꤬	with an intermediate compartment from which the water is fed by gravity after mechanically moving the compartment, the movement being controlled according to water level	36
F22D   5/04		ž	with pivoting buckets	58
F22D   5/06		ܥȼͳϢ̤̤Ѳ˱ƾ岼ưΤŬƴ郎̤ˤ	with receptacles external to, but in free communication with, the boilers and adapted to move up and down in accordance with change in water level	148
F22D   5/08		եȼưۤ	with float-actuated valves	426
F22D   5/10		ۤȰΤΥԥȥޤĤ	and with pistons or membranes unitary with the feed inlet valves	234
F22D   5/12		дɤĤ	and with dipping tubes	137
F22D   5/14		ǮĥǮ̤˱Ρ㡥Ǥˤ	responsive to thermal expansion and contraction, e.g. of solid elements	179
F22D   5/16		ήǤˤ	of fluids	91
F22D   5/18		ݥפ®٤ޤǽаϤѲ뤿Τ	for varying the speed or delivery pressure of feed pumps	250
F22D   5/20		եȤʤ	without floats	21
F22D   5/22		եȤ	with floats	75
F22D   5/24		ŵ	with electric switches	284
F22D   5/26		ư楷ƥΣ	Automatic feed-control systems	1655
F22D   5/28		Ф̤˱ΡϤ˱	responsive to amount of steam withdrawn; responsive to steam pressure	172
F22D   5/30		̤ȡ̤ޤϾϤȡξ˱	responsive to both water level and amount of steam withdrawn or steam pressure	461
F22D   5/32		ݥפ®٤ޤǽаϤ˱ƶ	influencing the speed or delivery pressure of the feed pumps	767
F22D   5/34		ۤŬѡΣ	Applications of valves	1341
F22D   5/36		ۤäϰϤβ٤ӰϤ߷פ줿¿ξȯ˵夹	for feeding a number of steam boilers designed for different ranges of temperature and pressure	76
F22D   7/00		ν۴Ĥ¥ʤ֡Σ	Auxiliary devices for promoting water circulation	404
F22D   7/02		ϧɤ˸ꤵ줿ȡʤޤμդĤˤ	Saddles or like directing plates fitted to furnace tubes	87
F22D   7/04		ޤϾΤΥ󥸥	Injectors for water or steam	147
F22D   7/06		ž֡㡥ץڥ	Rotary devices, e.g. propellers	22
F22D   7/08		ݥ֡㡥ܥ鳰¦	Arrangements of pumps, e.g. outside the boilers	323
F22D   7/10		ܥ¦	within the boilers	26
F22D   7/12			Control devices	100
F22D   7/14		ä˵ؼ֥ܥŬ	specially adapted for locomotive boilers	22
F22D  11/00		¾Υᥤ󥰥롼פ°ʤζ	Feed-water supply not provided for in other main groups	3228
F22D  11/02		ݥפ֡Σ	Arrangements of feed-water pumps	812
F22D  11/04		ʤˤ	with means to eliminate steam formation	83
F22D  11/06		ܥ˶Ž᤹̿	for returning condensate to boiler	4529
