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Class Information
Number: 418/206
Name: Rotary expansible chamber devices >

Sub-classes under this class:

Class Number Class Name Patents
418/1 Methods 223
418/102 Shaft or trunnion lubrication or sealing by diverted working fluid portion 146
418/103 Working member peripheral surface comprises relatively circumferentially movable segments 0
418/104 With mechanical sealing 197
418/14 With delayed load 39
418/15 With plural working fluid inlet or outlet passages 315
418/150 Working chamber surface expressed mathematically 240
418/151 Weight balanced working member or partition 174
418/152 Non-metallic working member, cylinder or partition 202
418/156 Resilient working member, cylinder or partition 48
418/157 Shock or pressure relieving yieldable peripheral working member or cylinder surface portion 9
418/158 Magnetically biased vane or abutment 14
418/159 Adjustable working chamber peripheral wall controls working fluid flow 44
418/16 With changeable working chamber magnitude 28
418/160 Moving cylinder 9
418/178 With wear surface treatment or integrally plated wear layer 338
418/179 Specific material 289
418/180 Apertured bypass to pressurize or relieve working chamber zone of intermediate pressure 82
418/181 Combined 149
418/182 Relatively movable working member and drive shaft axes 90
418/183 With supply or exhaust passage in working member 55
418/189 Trapped fluid relief 79
418/191 Interengaging rotating members 88
418/2 With signal, indicator or transparent inspection means 63
418/207 Relatively moving work transmitting barriers move in separate intersecting chambers 14
418/208 Movable intermediate partition engages peripheries of plural spaced working members 2
418/209 Plural working chambers 17
418/220 Helical working member 61
418/221 Moving abutment and vane 15
418/222 Separable abutment 6
418/223 With secondary vane or abutment moving means 6
418/224 Valved vane or abutment 6
418/225 Vane or abutment comprises rotatable element 77
418/228 Axially moving vane or abutment 9
418/234 Tapered vane or abutment (e.g., wedge shaped) 12
418/235 Wear elements or antifriction means in vane or abutment slot 24
418/236 Non-radially positioned sliding vane or abutment 20
418/239 Alternately usable vane or abutment structure for reverse working member rotation 2
418/240 Interconnected abutments 6
418/241 Abutment or vane has concurrent rocking and radially sliding movement 34
418/242 Spaced oscillating abutment portions engage working member 1
418/243 Positively actuated abutment 19
418/252 With provision for quick vane replacement 5
418/253 Interconnected vanes 26
418/259 Positively actuated vane 188
418/270 Miscellaneous 363
418/3 Diverse rotary expansible chamber devices 40
418/32 Self-acting unidirectional flow with reverse rotation or reverse flow with unidirectional rotation 47
418/33 Intermittently accelerated and receding members rotate in same path (alternating piston type) 17
418/39 Convertible or changeable by assembly or disassembly 40
418/4 Working member or cylinder surface has alternate linear and curvilinear movement (e.g., endless) 5
418/40 Speed controlled 7
418/45 Collapsible progressively deformed working chamber wall 32
418/46 With removal or accommodation of solid foreign material in working fluid 26
418/48 Unlike helical surfaces on relatively wobbling rotating member and encompassing cylinder (e.g., moineau type) 267
418/49 Nutating working member 11
418/5 Multistage 61
418/54 Working member has planetary or planetating movement 49
418/68 Rotating internal member rotates and oscillates or reciprocates 64
418/69 With frangible drive connection or clutch 65
418/70 With rapid disassembly feature (i.e., without tools) 15
418/71 Pressure fluid radially balances working or rotating abutment member 16
418/75 Grooved abutting cylinder-rotating member end surfaces 49
418/83 Heat exchange or non-working fluid lubricating or sealing 191
418/DIG.1 Non-working fluid separation 220

Patents under this class:

Patent Number Title Of Patent Date Issued

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