Motors: expansible chamber type > Patents

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Class Information
Number: 91
Name: Motors: expansible chamber type >
Description: This class is limited to motors for converting the energy of a pressure fluid into mechanical work in which a charge of simple pressure fluid is admitted to an expansible chamber, the expansion of said chamber converting into work only the original energy of the charge, the charge after expansion of said chamber being exhausted to some place other than whence it came, and in which no energy is extracted from the charge except by expansion of the chamber, said motors when of the reciprocating or oscillating type including control of the fluid.

Class Number	Class Name	No. of Patents
91/165	Application of motive fluid at different pressures to opposed working member faces	31
91/166	Double acting motor reversed by pressure variation of motive fluid	9
91/55	Combined	6
91/47	Constantly applied motive fluid with controlled venting	51
91/50	Cyclically operable	37
91/49	Fluid vented through working member	48
91/51	Motive fluid constantly applied to and vented from opposed chambers	40
91/48	Plural separately controlled vents	16
91/52	Constantly open throttled exhaust with controlled motive fluid supply	33
91/54	Convertible; or changeable by disassembly or assembly	16
91/355	Cutoff after single complete cycle	8
91/356	Reversal responsive to motive fluid pressure change	22
91/2	Cutoff or control after predetermined number of cycles or revolutions	2
91/218	Cyclically operable	23
91/277	Adjustable working member reversal position (e.g., stroke control, etc.)	29
91/279	Adjustable lost motion connection	5
91/278	Selective diverse supply or exhaust paths for distributor motor	10
91/344	Biasing means moves distributor after predetermined travel (i.e., snap action)	11
91/345	Distributor moves about axis	6
91/346	Spring biased	43
91/347	Coil spring moves laterally relative to coil axis	16
91/245	Clearance control	3
91/230	Codirectional separately supplied working members	3
91/231	One working member supply is distributor controlled	5
91/246	Correlated throttle valve and distributor	3
91/348	Distributor actuator between space piston faces	6
91/349	Distributor moves about axis	2
91/341R	Distributor actuator extends into working chamber	27
91/342	Axially slidable through working face	13
91/343	Moves laterally relative to working member reciprocatory path	4
91/341A	Valves in partition between tandem pistons	6
91/276	Distributor forms traversed movable portion of working chamber wall (423)	31
91/222	Distributor in piston (422)	10
91/226	Communication into piston through peripheral port	9
91/227	Port controlled by piston position	8
91/224	Distributor establishes communication between opposite faces of piston	56
91/229	Distributor operated by abutment with cylinder head	45
91/223	Oscillating piston (e.g., vane, etc.)	1
91/228	Piston carries separate inlet and exhaust valves	9
91/225	Piston traverses pilot port to control distributor motor motive fluid	6
91/329	Distributor located in cylinder between spaced working faces	29
91/327	Distributor moves about axis parallel to working member reciprocatory path	8
91/326	Distributor moves transverse and parallel to same line	1
91/328	Distributor peripherally engages (1) working chamber wall, or (2) cylinder between opposed working faces	11
91/275	Electrically or magnetically actuated or adjusted distributor (459)	78
91/321	Motive fluid constantly applied to one working member face (235) (417)	96
91/236	Multiple exhaust passages (e.g., compression control, etc.)	2
91/244	Controlled by separate relatively movable valves	0
91/239	Distributor for inlet or first exhaust controls second exhaust passage	5
91/237	Exhaust valve has separate valve controlled second exhaust passage therein	2
91/238	Pressure controlled second passage	1
91/240	Fluid pressure actuated valve for second exhaust passage	5
91/241	Compression actuated discharge to motive fluid supply	0
91/242	Exhaust pressure controlled	0
91/243	Working member controlled exhaust port with valved second exhaust passage	9
91/339	Oscillating working member	22
91/340	Distributor reversed by rotated part	0
91/280	Pulsator-actuated distributor (460)	9
91/323	Relatively movable distributors for opposed working chambers	14
91/324	Distributor moves about an axis	1
91/265	Relatively movable inlet and exhaust valves	7
91/269	Biased valve with trip	4
91/268	Exhaust valve closed or held closed by inlet fluid (442)	14
91/270	Inlet and exhaust valve movable about an axis	3
91/267	Lost motion drive from inlet to exhaust valve	4
91/266	Oscillating working member	4
91/271	Reciprocating inlet and exhaust valves	10
91/272	Codirectional with working member movement	7
91/273	Axially seating valves	16
91/264	Relatively movable serial distributors	2
91/247	Timing control by relative adjustment of plural movable fluid control elements	7
91/252	Cut off adjustable relative to admission	0
91/262	Adjustable cam or cam follower actuated inlet valve	0
91/263	Adjustable fluid control for fluid actuated inlet valve	0
91/260	Biased inlet valve with adjustable tripping means	0
91/261	Inlet valve movable about an axis	0
91/253	Inlet controlled by relatively cyclically moved elements	0
91/255	Adjustable fluid control for fluid actuated cut off	1
91/254	Biased cut off with adjustable trip	0
91/256	Cut off adjustable relative to reciprocating admission element	0
91/258	Arcuate adjustment of cut off	0
91/259	Cut off adjustable codirectional with admission element movement	0
91/257	Oscillating admission element	0
91/248	Electrical adjustment	6
91/249	With relative adjustment of plural adjustable fluid control elements	2
91/250	Adjustable inlet and exhaust events	2
91/251	With adjustable release and compression events	0
91/232	Valveless distribution	8
91/233	Distribution by reciprocating working member moving about an axis	2
91/234	Working member formed to provide internal fluid flow passage	43
91/220	With condition responsive stop means	10
91/221	Speed	3
91/219	With dwell	13
91/274	With independent throttle adjustment for one side of double-acting motor	3
91/322	With independently operable means to lock distributor	4
91/330	With independently operable means to move or means to adjust movement of distributor	20
91/331	Means adjusts motion transmission from working member to distributor	3
91/332	Adjusting means comprises motor	0
91/333	Speed controlled	0
91/334	To reverse direction of rotation of interposed shaft	0
91/337	With means independent of distributor reversing parts to cyclically hold distributor	23
91/338	Positive hold (e.g., tripped type, etc.)	5
91/335	With throttle valve or distributor throttle adjustment	7
91/336	Speed controlled	8
91/235	Working chamber receives controlled motive fluid supply from opposed chamber having constant supply (321) (417)	33
91/325	Working member controlled inlet or exhaust port (e.g., semi-valveless, etc.)	43
91/281	Working member controlled motive fluid for distributor motor	9
91/289	Adjustable means to retard or lock distributor motor	5
91/315	Distributor moves about an axis	2
91/316	Distributor moves laterally relative to working member reciprocatory path	5
91/286	Distributor or distributor motor mechanically moved cyclically to control actuating fluid for distributor motor	8
91/288	Distributor motor mechanically moved about axis	1
91/287	Movement of relatively movable pilot mechanically moves distributor	5
91/282	Fluid supply through diverse paths to distributor motor chamber	3
91/283	Path controlled by independently operable means	1
91/284	Independent means to adjust distributor motor supply or exhaust passage	7
91/285	Separately adjusts one chamber of double-acting distributor motor	3
91/318	Motive fluid build-up at end of working stroke reverses distributor	32
91/304	Pilot valve controlled distributor motor (461)	28
91/312	Distributor motor working member is valve seat for pilot valve	7
91/308	Fluid-operated pilot valve	43
91/313	Pilot valve actuator extends into working chamber	52
91/310	Pilot valve moves about an axis	3
91/311	Pilot valve moves laterally relative to working member reciprocatory path	11
91/307	Pilot valve relieves constantly supplied distributor motor fluid	27
91/305	Plural pilot valves	10
91/306	Independent	34
91/309	With distributor motor reversal by constantly applied fluid pressure	19
91/314	Working member reverses pilot through part movable relative to both	12
91/303	Working member adapted to directly mechanically reverse distributor	37
91/317	Working member compresses fluid to reverse distributor	30
91/319	Working member traverses pilot passage to control distributor motor	36
91/320	Port in piston between opposed working faces	12
91/290	Working member traverses pilot port in working chamber side wall	28
91/296	Constantly open exhaust from distributor working chamber	0
91/302	Pilot port relieved into working chamber having working member controlled exhaust port	3
91/295	Plural ports control relatively movable distributor motors	2
91/291	Port controls separate motor for intermediate pilot valve	15
91/292	Distributor controls passage from port	1
91/301	With control of distributor motor supply or exhaust port by distributor working member	2
91/300	With distributor reversal by constantly supplied motive fluid	41
91/299	With distributor reversal by fluid compressed by working member	10
91/297	With passage for pilot fluid in working member	7
91/298	Working member passage supplies distributor motive fluid	8
91/293	With passage from port controlled by pilot valve	3
91/294	Pilot valve operated by separately controlled fluid motor	0
91/350	Working member reverses distributor through part movable relative to both	36
91/352	Distributor moves about axis	13
91/353	Distributor moves laterally relative to working member reciprocatory path	4
91/351	Meshing rotary gear	4
91/354	Rotated part	2
91/415	Differential	37
91/417R	Motive fluid constantly applied to one working member face (235) (321)	134
91/417A	Staplers having two diameter pistons	8
91/416	Opposing pressure applied by bypassing	51
91/DIG.1	Digital	5
91/53	Engine rotating or starting type	4
91/DIG.2	Exhaust throttled motor control	9
91/167R	Extension of unit having separately controlled working chambers equals sum of individual chamber extensions	58
91/168	Control of motive fluid for one working member in response to position of second	20
91/167A	Vane	4
91/6	Fluid supply through diverse paths to single expansible chamber	109
91/32	Activation of one path disables second path	74
91/33	Pressure operated	34
91/11	Changeable from multiple expansion to simple operation	0
91/12	Cyclically operable motor with port reversing	2
91/13	By shifting distributor seat	0
91/14	By shifting distributor	2
91/15	Selector valve between distributor and motor	1
91/19	Diverse paths used to control extent of working member travel	11
91/16	Drifting or coasting on lower pressure	3
91/18	Pressure control of drifting fluid	0
91/17	With speed responsive cutoff of drifting fluid	1
91/31	One path includes restriction	123
91/20	Position responsive	23
91/24	Additional inlet path opened in response to position	17
91/25	Working member or part carried thereby uncovers inlet port	32
91/26	First path has check valve or selectively adjustable throttle	23
91/27	Plural simultaneous paths, one cutoff in response to position	21
91/22	Preliminary inlet to contracting chamber (e.g., cushioning, etc.)	3
91/23	By bypassing from expanding chamber (399)	3
91/21	Rotating working member or chamber	1
91/28	Second path activated in response to pressure or flow in first path	34
91/29	By pressure rise in first path	68
91/7	Selective cyclic and noncyclic operation or parking	4
91/8	Semi-compound type	1
91/9	Changeable by shiftable distributor	1
91/10	With condition responsive change-over valve	1
91/30	Serially arranged reversing valves	5
91/6.5	Three or more cylinders arranged in parallel, radial or conical relationship with rotary transmission axis	28
91/4R	Hydro-pneumatic	61
91/4A	With float mechanism	5
91/35	Independently operated timer, delay, pattern or cyclic control	48
91/38	Fluid actuated valve with volume chamber delay means	21
91/39	Independent distributor actuation for cyclic control	41
91/40	Fluid actuated distributor motor	25
91/36	Of independently movable working members	32
91/37	Pattern or template control	16
91/3	Jet control type	30
91/DIG.3	Large area valve	3
91/DIG.4	Magnets	32
91/471	Miscellaneous (e.g., methods, etc.)	43
91/196	Moving cylinder	22
91/216R	Cylinder and piston have relative reciprocation on fixed axis	16
91/216B	Cyclical moving cylinder	15
91/216A	Moving cylinder having follow-up	17
91/217	Reciprocating piston and cylinder	29
91/210	Oscillating cylinder	9
91/211	Cooperating valve ports in cylinder and fixed member	1
91/214	Ported arcuate slide face on which cylinder moves	0
91/212	Ported end bearing	0
91/213	Ported trunnion	0
91/215	Cylinder carried valve operated by fixed actuator	1
91/197	Plural rigidly connected rotary cylinders	16
91/206	With integral exterior working face	0
91/207	Both faces urged in single direction	6
91/209	Fluid to exterior face controlled by cylinder position	3
91/208	Fluid to exterior face controlled by motive fluid pressure	0
91/152	Multiple expansion	5
91/156	Concentric working chambers	1
91/164	Dual, rigidly connected high and low pressure faces	6
91/153	Duplex	1
91/154	Cut-off or reversing	0
91/159	Expansion between relatively movable working members	2
91/160	Double acting high and low pressure working members	0
91/161	Fluid acts on each working member in single direction	1
91/162	High and low pressure faces on each working member	0
91/163	Fluid expanded through working member	0
91/157	Relative valving adjustment between high and low pressure working chambers	0
91/158	Adjustment for valving for plural chambers	0
91/155	With fluid actuated distributor	1
91/508	Plural relatively movable or rigidly interconnected working members	59
91/511	Condition responsive means for modifying working member operation	33
91/513	Condition is position of fluid control member of motor other than motor whose operation is modified	39
91/512	Condition is that of a load driven by a working member other than working member having its operation modified	42
91/517	Condition sensed is working member speed or working fluid pressure of another motor (i.e., fluid pressure or flow to or from expansible chamber of the other motor)	158
91/518	Motive fluid control valve responsive to pressure in supply line to or exhaust line from motor which it modifies	159
91/514	Pressure responsive valve divides motive fluid between motors	28
91/515	For synchronization of motors	42
91/516	To give one motor priority to motive fluid over another	134
91/509	Having (1) stand-by or (2) redundant means enabling load to be driven upon failure of primary load moving means	56
91/510	Stand-by means utilizes an auxiliary motive fluid source for another working member to drive same load	38
91/520	Motors connected in series	110
91/535	Relatively movable working members of unequal cross-sectional areas	21
91/521	Separate valve means actuatable by a common nonmanual actuator or separately actuatable means with common manual actuator	37
91/523	Simultaneously actuated separate valve means	42
91/524	Successive actuation of separate valve means	29
91/522	With means to independently actuate valve means	38
91/533	Single valve for plural rigidly connected working members	53
91/534	Single valve for relatively movable working members driving common load	39
91/536	Single valve for relatively movable working members	64
91/532	With means for proportioning motive fluid supply to plural motors	90
91/519	With means for selectively changing the speed or force exerted on load by the selective application of motive fluid in a single direction to one or more working members	137
91/525	With means to control the working fluid to one working member for movement relative to another without controlling the working fluid to the other working member by said means	37
91/530	Control means includes separate control valves for each working member	91
91/531	With additional control valve in series with at least one separate control valve in supply line to one of motors	71
91/528	Control means is fluid pressure operated valve	14
91/529	Fluid pressure operated valve controlled by a pilot valve	78
91/527	Valve controlled by remote means (e.g., radio, electromagnetic, etc.)	46
91/526	With multiway valve in series with control means	28
91/390	Position maintaining type	48
91/170R	Relatively movable working members with one having motive fluid controlled by, movably interconnected with or moved by another	45
91/181	Interconnected working members in communicating chamber portions	10
91/182	Means connecting working members actuates common part controlling motive fluid for the members	3
91/170MP	Mine props	40
91/176	Moving cylinders	33
91/173	One working member forms movable chamber for another	48
91/172	One working member oppositely biased by another	13
91/177	Oscillating working members	5
91/189R	Position of one working member controls motive fluid for another	99
91/190	Changeable to plural self-controlled working members	0
91/191	Each cyclically controls another (e.g., duplex, etc.)	9
91/193	Fluid operated valve controlled by relatively movable working member	11
91/194	Rotating output shaft type (e.g., locomotive or reversing means, etc.)	4
91/195	With self-control	0
91/192	With three or more working members	6
91/189A	Piston or rod directly valves passage	45
91/178	Single valve unit controlling plural working chambers	26
91/179	Oscillating valve	3
91/180	Rotary valve	32
91/171	Synchronizing in response to sensed difference in positions	63
91/174	With connection to relatively movable output member disposed between spaced unitary end faces	2
91/183	With means interconnecting working members to cause relative motion	15
91/186	Connection includes toothed gearing or rocking lever	27
91/187	Means varies cyclic relation between working member and control valve therefor	8
91/188	Motive fluid control actuator includes cam or crank rigid with means connecting working members	11
91/185	Motive fluid control by pitman swing or intermittent contact with working member	4
91/184	Working member covers port to control motive fluid	4
91/61	Rotary and reciprocating working members	25
91/357	Selectively usable or positionable working member controlled vent in chamber wall (402)	11
91/151	Serially formed expanding working chambers (e.g., endless, etc.)	0
91/34	Single acting, changeable to or from double acting	4
91/169	Single chamber formed by mutually relatively movable cylinder, sleeve and piston	18
91/472	Three or more cylinders arranged in parallel radial or conical relationship with rotary transmission axis	19
91/473	Condition responsive control of drive transmission	17
91/484	Control valve seating surface contact maintained by fluid pressure bias	13
91/485	Disc valve	37
91/499	Cylinders parallel to rotation axis	288
91/501	Cylinders contain plural oppositely movable pistons	17
91/502	Including plural axially spaced working chambers (e.g., double-acting working members, etc.)	28
91/500	Plural angularly disposed cylinder banks	14
91/507	Positive bidirectional drive of reciprocating members	20
91/503	Rotary spool valve	36
91/504	Stroke control	45
91/505	By varying reaction plate inclination relative to cylinder axes	150
91/506	Motor operated	171
91/475	Having yieldable drive transmission	3
91/482	Means varies cyclic relation between reciprocating member and control valve therefor	16
91/483	By adjustment of transmission or reaction element	8
91/486	Motive fluid bypass to or from assembly	30
91/488	Fluid conducting passage disposed within piston	73
91/487	Separate passage directs motive fluid to or from valve interface	34
91/489	Valved	16
91/490	Motive fluid supply or discharge through piston	20
91/491	Radially disposed cylinders	169
91/498	Cooperating valve ports in cylinder and relatively movable central member	74
91/494	Cylinders and pistons form or coact with respective common elements having limited relative rotary movement	14
91/495	Cylinders or pistons pinned to common element	15
91/492	Plural banks	61
91/496	Positive bidirectional drive or reciprocating members	8
91/493	Rigidly connected pistons reciprocate within rigidly connected cylinders	20
91/497	Stroke control	75
91/474	Separate fluid supply or discharge paths	5
91/476	Separate motive fluid control for each working chamber	15
91/479	Control by moving cylinder or liner	0
91/477	Each piston acts as valve for different working chamber	6
91/478	Means varies cyclic relation between reciprocating member and control valve therefor	3
91/480	Mechanically actuated valves	19
91/481	Radial cylinders	12
91/59	Torque responsive motive fluid control	36
91/391R	With alternative manual actuation of load	94
91/391A	Alternate pedal positions	7
91/41	With correlated control of motive fluid and locking means	29
91/42	By electrical control means	20
91/45	Common or interconnected valve means control motive fluid and fluid for locking means	50
91/44	Sequential operation of locking means and motive fluid control	75
91/43	Working member position control of motive fluid and locking means	26
91/46	With interrelated control of motive fluid and lubricant	15
91/418	With motive fluid valve	38
91/433	Both inlet and exhaust controlled by motive fluid pressure in supply line or chamber	213
91/434	With manual valve actuating means responsive to motive fluid pressure (e.g., "feel", etc.)	106
91/431	Continuous motive fluid flow through chamber in motor idle condition	38
91/420	Contracting chamber exhaust valve controlled by expanding chamber pressure or flow	283
91/435	Controlled by rate of movement of working member	34
91/429	Dither valve	28
91/459	Electrically operated (275) (361)	410
91/421	Expanding chamber inlet controlled by contracting chamber pressure or flow	72
91/462	For double-acting motor	45
91/464	Means to simultaneously open working chambers to inlet or exhaust	92
91/465	Relatively movable unitary inlet and exhaust valves for opposed working chambers	95
91/466	Unitary inlet and exhaust valve means for opposed working chambers	40
91/467	Valve means moves about an axis	103
91/463	With means to provide unequal flow rates to or from opposed working chambers	39
91/440	For exhausting contracting working chamber to expanding opposed nonworking	26
91/437	Independent control of bypass between opposed working chambers	128
91/438	Held closed by motive fluid pressure	32
91/439	Bypass through supply line	7
91/432	Inlet check valve with means for disconnectable supply line (468)	27
91/436	Inlet fluid supplemented by controlled fluid pressurized in opposed contracting chamber	153
91/428	Manual control carried on or operated from load or output element	16
91/461	Pilot valve (304)	424
91/453	Plural actuators for single valve means (367)	40
91/427	Plural manual control stations	15
91/449	Plural separately controlled waste passages for single working chamber	55
91/450	One passage controlled by inlet and exhaust valve	61
91/451	Another passage controlled by motive fluid pressure or flow responsive valve (468)	146
91/452	One passage controlled by motive fluid pressure or flow-responsive valve (468)	73
91/460	Pulsator actuator for valve (280)	45
91/454	Relatively movable inlet and exhaust valves for single working chamber	169
91/455	One valve forms unitary part of valve controlling opposed working chamber	25
91/456	One valve moves about an axis	1
91/457	Single actuating means moves both valves	50
91/444	Relatively movable serial valves	69
91/448	In supply path	189
91/446	Including motive fluid pressure or flow responsive valve (468)	335
91/447	Between working chamber and inlet and exhaust valve	229
91/445	Stop valve between working chamber and inlet and exhaust valve	157
91/419	Responsive to (1) motive fluid temperature or state, or (2) motor position or orientation	39
91/468	Self-acting valve (432) (446) (451) (452)	98
91/442	Self-opening exhaust valve held closed by inlet pressure (268)	50
91/458	Speed governor operated (366)	15
91/443	To provide unequal inlet and exhaust flow rates to single working chamber	126
91/424	Two hand control	39
91/425	With motor-controlled holding means for valve	0
91/469	Unitary inlet and exhaust valve for single working chamber	30
91/470	Valve moves about an axis	18
91/423	Valve part forms traversed movable portion of working chamber wall (276)	1
91/430	Valve parts continuously relatively moved for nonvalving function	2
91/422	Valved piston (222)	136
91/441	With ambient fluid inlet valve to expanding working chamber	34
91/426	With fluid pressure holding means for valve	44
91/1	With signal, indicator or inspection means	186
91/5	Working member moved by stored motive fluid charge	58
91/358R	Working member position feedback to motive fluid control	35
91/389	Adjustable	11
91/385	Bias-type input and feedback signal means	9
91/386	Feedback bias means adjustable	13
91/387	Spring-type feedback bias means	66
91/361	Electrical input and feedback signal means (459)	270
91/363R	Follower type	91
91/363A	Fail safe control	60
91/362	Means provides incremental movements (e.g., stepper type, etc.)	18
91/388	Fluid operated	56
91/368	Follower type	46
91/383	Cable	11
91/382	Cam and follower	39
91/381	Differential gearing	12
91/379	Disproportional rate of response	2
91/384	Floating link	27
91/374	Plural movable valve parts	45
91/376R	One movable part unitary with working member	572
91/378	Axially movable spool-type valve	48
91/377	Lost motion linkage connecting valve, load and working member	10
91/376A	Vane	13
91/375R	Valve part moves about an axis	156
91/375A	Torsion bar	320
91/380	Screw and follower (e.g., nut, etc.)	45
91/370	With motor chamber pressure reaction on valve	25
91/372	Spring-loaded valve	56
91/373	With lost motion between input and reaction member	21
91/371	With valve means limiting reaction pressure	29
91/369.1	With relatively movable working and output members reacting on input member	101
91/369.4	Lever reaction means	58
91/369.2	Rubber block reaction means	268
91/369.3	And transverse valve key	94
91/367	Plural input signal means for single motor valve (453)	70
91/359	Regenerative or positive feedback type	8
91/366	Speed governor controlled input signal (458)	8
91/358A	Valve locking means	19
91/365	With main valve position feedback to pilot valve	29
91/364	With means to vary feedback signal in response to rate of working member movement	32
91/360	With safety means operable upon input signal loss	7
91/392	Working member position responsive motive fluid control	56
91/397	Alternate control of inlet and exhaust for same chamber at opposite ends of stroke	20
91/399	Bypassing between expanding chamber and closed or throttled contracting chamber (e.g., cushioning, etc.) (23)	38
91/404	Exhaust control	31
91/405	Throttling (e.g., cushioning, etc.)	60
91/407	By successively controlling or controlling less than all of plural exhaust passages	27
91/408	Working member covers exhaust port (409)	51
91/406	Exhaust valve with bleed passage therein	15
91/409	Working member covers exhaust port in contracting chamber (408)	34
91/403	Position controls actuating fluid for valve	37
91/393	Position initiated timing or delay means	11
91/398	Simultaneous control of inlet and exhaust of same chamber	19
91/400	Venting expanding chamber	32
91/401	Through working member	68
91/402	Working member overrides exhaust port (357)	46
91/394	Working member carries part within working chamber which controls port in chamber end wall	53
91/396	Part forms throttle member	35
91/395	Part movable with respect to working member	45
91/410	Working member controls relatively movable inlet valve	59