Manual of U.S. Patent Classification
as of June 30, 2000

Class
417
PUMPS

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Subclass definitions may be accessed by clicking on the subclass number, below.

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Subclass		Title
ClassTitle		===> PUMPS
1		CONDITION RESPONSIVE CONTROL OF PUMP DRIVE MOTOR
2		. Plural pumps having separate drive motors, supply sources, or delivery destinations
3		. . Pumps in parallel flow paths with common inflow or outflow
4		. . . Having means sensing condition in common inflow or outflow line
5		. . . . With control of plural pump drive motors
6		. . . . . With additional means sensing condition of one pump or path
7		. . . . . Sequential starting or stopping of pumps
8		. . . . . . Alternating sequences
9		. By stopping pump in response to leakage into or from system
10		. By controlling starter motor for internal combustion engine
11		. By controlling free piston internal combustion engine
12		. Having timer or delay means
13		. Responsive to pump lubricant, sealant, or coolant condition
14		. Having ambient condition responsive means
15		. With control of pump drive transmission
16		. With plural separate drive motors for single pump unit
17		. With plural separate drive motor controlling elements
18		. Single motor control element responsive to means sensing diverse conditions
19		. . Sensing both inlet and outlet conditions
20		. . One condition is rate of flow to or from pump
21		. . One is motive fluid condition of fluid drive motor
22		. . One condition is speed of pump
23		. . . With common element sensing diverse condition to control motor and pump fluid valve
24		. . . Speed sensor comprises auxiliary pump or electric generator
25		. Relatively movable elements sensing same system pressure for single control element
26		. With condition responsive control of pump fluid valve
27		. . Having independent means for delaying valve actuation
28		. . Fluid and motor controls have common sensing element
29		. . Fluid and motor controls separately responsive to diverse conditions
30		. . . Liquid accumulation controlled discharge valve downstream of motor controller sensing means
31		. . . . Motor controller responsive to liquid pressure
32		. Responsive to pump or pump fluid temperature
33		. Pump stop control means requiring manual reset
34		. By controlling internal combustion drive engine
35		. By controlling wind motor in response to liquid accumulation
36		. Responsive to accumulation of pumped liquid in receiver
37		. . By movable liquid receptacle
38		. . By liquid pressure sensor
39		. . With motive fluid supply communicating with liquid receiver
40		. . By float
41		. . . Controlling motive fluid or drive motor
42		. In response to pump speed
43		. Responsive to change in rate of pump fluid flow
44.1		. By control of electric or magnetic drive motor
45		. . By changing electrical characteristic of motor or motor circuit
44.2		. . Responsive to pump fluid pressure
44.4		. . . Low pressure stops motor from turning on pump
44.5		. . . Mercury switch
44.6		. . . Dial-type sensor
44.7		. . . Bellow-type sensor
44.8		. . . Piston-type sensor
44.9		. . . Diaphragm
44.3		. . . Inlet pressure
44.11		. . Responsive to change in electrical operating characteristic
46		. By controlling drive motor motive fluid
47		. . Rotary nonexpansible chamber-type motor
48		ELECTRICAL OR GETTER TYPE
49		. Ionic with gettering
50		. Electromagnetic
51		. Getter heating, vaporizing, or regeneration
52		EXPANSION AND CONTRACTION OF PUMP FLUID
53		PROCESSES
54		. Of pumping one fluid by contact or entrainment with another
55		. . Specific motive fluid
56		DRILLED WELL FREE PISTON-TYPE PUMP
57		. Having condition or position responsive control of pump discharge flow path
58		. Having condition or position responsive control of motive fluid supply
59		. Radially expansible piston portion controls pump and motor chamber intercommunication
60		. Mechanically actuated valve carried by piston
61		BUOYANTLY SUPPORTED
62		ALTERNATE SERIES OR PARALLEL OPERATION OF PLURAL PUMPS
63		WITH SIGNAL, INDICATOR, OR INSPECTION MEANS
64		GAS PRESSURE EXCHANGE USING ROTARY CELLULAR CONVEYOR
65		ONE FLUID PUMPED BY CONTACT OR ENTRAINMENT WITH ANOTHER
66		. Contact or entrainment within rotary impeller
67		. . Passage in impeller shaft for pumped or motive fluid
68		. . Liquid ring
69		. . . With diverse pump
70		. . Peripheral motive fluid inlet
71		. . Axial inlet for pumped fluid
72		. . . Peripheral pumped fluid outlet
73		. By ignition of motive fluid
74		. . With pumped fluid condition responsive ignition means
75		. . With fluid momentum utilizing means
76		. Jet pump with motive fluid generating pump
77		. . Recirculation of separated motive fluid
78		. . Entrainment at exit of impeller
79		. . Jet delivers back to generating pump
80		. . . Rotary nonexpansible chamber-type generating pump
81		. . . . Multiple-stage rotary pump
82		. . . . Changeable jet location (e.g., deep or shallow well)
83		. . . . Jet within rotary pump casing
84		. . Rotary nonexpansible chamber-type generating pump
85		. Diverse pumps
86		. . Including pneumatic displacement
87		. . Including jet pump
88		. . . Diverse pump motor exhaust is jet motive fluid
89		. . . With rotary nonexpansible chamber type
90		. . Including aerated column
91		. . . Diverse pump motor exhaust is aeration fluid
92		. Liquid piston
93		. . Moving contracting chamber
94		. . . Helical chamber
95		. . . Movement of chamber cyclically controls flow of liquid into chamber for cyclic operation
96		. . . Liquid supporting chambers move liquid to pump fluid
97		. . . Relatively movable chambers
98		. . . Reciprocating
99		. . Mercury piston
100		. . Tide or wave
101		. . Piston level responsive control for cyclic operation
102		. . . Plural chambers
103		. . Plural chambers
104		. . Momentum piston
105		. By condensation of motive fluid
106		. . Plural alternating pumps
107		. . With condition responsive control means
108		. Aerated column
109		. . Valved gas inlet
110		. . . With pumped fluid velocity or flow responsive valve operating means
111		. . . Plural serially actuated valves
112		. . . With flexible pressure responsive sensing element (i.e., bellows, diaphragm, etc.)
113		. . . . Sensing element controls pilot valve
114		. . . With pilot valve
115		. . . Valve member actuated responsive to absolute gaseous motive fluid pressure or flow rate
116		. . . Controlled by means responsive to liquid level accumulation in column
117		. . . Valve biased open by static pressure of pumped fluid
118		. Liquid pumped by supplying or exhausting gaseous motive fluid to or from pumping chamber
119		. . Motive fluid pumped by contact with a liquid
120		. . With condition responsive control of motive fluid vacuum or pressure generating means
121		. . Serially connected pumping chambers
122		. . Alternate pumping from plural pumping chambers
123		. . . Motive fluid in one chamber controlled by condition in second chamber
124		. . . . Responsive to weight of pumped fluid
125		. . . . Responsive to liquid level of pumped fluid
126		. . With float actuated control means
127		. . . Plural floats in single pumping chamber
128		. . . With intermediate pilot valve
129		. . . With intermediate electrical actuating means
130		. . . Control of motive fluid inlet (e.g., atmosphere, etc.)
131		. . . . With control of motive fluid outlet
132		. . . . . With control of pumped fluid outlet
133		. . . . . With overcenter valve actuator means
134		. . . Control of motive fluid outlet
135		. . . . With control of pumped fluid outlet
136		. . . . With control of pumped fluid inlet
137		. . Cyclic pumping
138		. . . Control by liquid level sensing means
139		. . . Control by condition of pumped fluid
140		. . . . Movable pumping chamber
141		. . . . Responsive to flow of pumped fluid
142		. . . . Responsive to pumped fluid pressure
143		. . . Motive fluid supply or exhaust valve responsive to motive fluid pressure
144		. . . Correlated motive fluid valve and pressure or vacuum generating means
145		. . . Correlated supply - exhaust of motive fluid or vacuum generating means
146		. . . . With pilot valve
147		. . . . Unitary supply - exhaust valve
148		. . With vacuum generator
149		. . . With pressure generator
150		. Gravity flow motive fluid
151		. Jet
152		. . Vapor condensation vacuum diffusion type
153		. . . With cooling or heat insulation means
154		. . . Vertical stack from generator with reverse flow nozzle
155		. . Flue type
156		. . . With spark arrester
157		. . . Regulation
158		. . With motive fluid generator
159		. . . Internal-combustion engine motive fluid source
160		. . Cleaning by separate fluid or diverted motive fluid
161		. . Radial disc-type motive fluid jet
162		. . Interrelated overflow and motive fluid valves
163		. . Successive introduction of motive fluid
164		. . . With interstage cooling
165		. . . Individually controlled motive fluid flows
166		. . . . Sequential
167		. . . Central and peripheral motive fluid supply
168		. . . One motive fluid flow surrounds nozzle tube of another
169		. . . Laterally spaced parallel motive fluid flows
170		. . . In-line motive fluid flows
171		. . Tangential motive fluid supply (i.e., vortex type)
172		. . Concentric reverse flow motive fluid and discharge conduits
173		. . With cooling
174		. . Successive entrainment of pumped fluid
175		. . With priming or overflow removal jet
176		. . Parallel entrainments with separate combining tubes
177		. . Annular motive fluid stream entrains pumped fluid outside and inside
178		. . Selectively usable flow confining members (e.g., nozzles, combining tubes, etc.)
179		. . Plural motive fluid jets or sources for single entrainment
180		. . . Individual or relative control
181		. . Faucet or flexible hose attached
182		. . Regulation
182.5		. . . Liquid level responsive
183		. . . By position of nozzle relative to combining tube
184		. . . . Pressure controlled
185		. . . With main line downstream control
186		. . . By bypassing motive fluid from nozzle
187		. . . By controlling motive fluid
188		. . . . Interrelated with pumped fluid control
189		. . . . Pressure controlled
190		. . . Pumped fluid inlet valve
191		. . . . Pressure controlled
192		. . . Pressure controlled overflow
193		. . . . By movable conduit or conduit wall (e.g., combining tube)
194		. . With means to whirl pumped fluid
195		. . Specific material
196		. . Expressed mathematically or dimensionally
197		. . Peripheral motive fluid supply
198		. . Specific motive fluid nozzle
199.1		DIVERSE PUMPS
199.2		. Priming and venting
200		. Priming with liquid level responsive control
201		. Including rotary nonexpansible chamber type
202		. . Diverse pump controlled by rotary pump condition
203		. . Preceding diverse pump
204		. Moving partition or cylinder of rotary pump forms or actuates reciprocating pump
205		. Series
206		. . Rotary expansible chamber type precedes reciprocating
207		BY HEATING OF PUMPED FLUID
208		. Vapor generator type
209		. . With inlet valve
210		PUMP FLUID BIASED OVERCENTER LOAD EQUALIZER
211		INERTIA-TYPE PUMPING MEMBER OR DRIVE MEANS
211.5		LIQUID LEVEL RESPONSIVE CONTROL OF DISPLACEMENT, VOLUMETRIC CAPACITY, OR DRIVE TRANSMISSION
212		CONDITION RESPONSIVE CONTROL OF DRIVE TRANSMISSION OR PUMP DISPLACEMENT
213		. Having condition responsive pumped fluid control
214		. Having means to hold or resist movement of pumping element
215		. By changing phasing of plural pistons in single chamber
216		. Plural pumps with individual or relative control
217		. Reversible flow pump
218		. Adjustable cam or linkage
219		. . Radially adjustable stator
220		. . . Rotary expansible chamber pump
221		. . Radial cam or eccentric
222.1		. . Axial cam
222.2		. . . With sump pressure actuation
223		. Disconnectable drive element (e.g., clutch, belt, shifter, etc.)
225		INTENSIFIER
226		. Ram type
227		. . Multiple drive pipe
228		WITH CONDITION RESPONSIVE CONTROL OF COOLANT OR LUBRICANT
229		OPERATED BY ART DEVICE
230		. Chair
231		. Vehicle mounted or attached
232		. . Scoop type
233		. . Wheel or axle
234		AMBULANT, BODY SUPPORTED, OR WITH CARRYING HANDLE
235		. Pump driven by traverse movement
236		CONVERTIBLE TO APPARATUS OF A DIFFERENT CLASS
237		. Motor and pump
238		CHANGEABLE BY ASSEMBLY OR DISASSEMBLY
239		. For reverse drive or flow
240		INERTIA LIQUID PISTON (E.G., MOMENTUM, ETC.)
241		. Movable confining means
242		POSITION RESPONSIVE BYPASS BETWEEN PLURAL PUMP CHAMBERS
243		WITH INTERCOOLER
244		SUCCESSIVE STAGES
245		. Fluid motor for one stage supplied from another stage
246		. Stages driven by relatively movable motor working members
247		. . Rotary
248		. Parallel stages to or from single stage
249		. Prior stage delivers to atmospheric chamber
250		. With interstage intake or additional inlet to latter stage
251		. With interstage discharge or additional discharge from former stage
252		. . Pressure responsive interstage discharge
253		. Condition responsive control of fluid
254		. Reciprocating rigid stages
255		. . Crankcase forms stage or interstage flow path
256		. . Stages comprise oppositely moving valved pumping members
257		. . . Aligned
258		. . Reciprocating cylinder and piston
259		. . Including valved piston
260		. . . Piston forms or carries inlet and outlet valve for one stage
261		. . . Serial interstage distributors in piston
262		. . . Valve in piston is first stage inlet valve
263		. . . With additional pumping member in parallel flow path
264		. . . Fluid motor driven
265		. . Relatively movable
266		. . Three or more
267		. . Series double acting
268		. . Unidirectionally acting rigidly connected pumping members
269		THREE OR MORE CYLINDERS ARRANGED IN PARALLEL, RADIAL, OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS
270		. Condition responsive fluid control
271		. Motor driven
272		. Continuous unidirectional fluid bias on reciprocating member
273		. Radial cylinders
274		CONDITION RESPONSIVE VARIABLE VOLUMETRIC CAPACITY EXPANSIBLE CHAMBER PUMP (I.E., CLEARANCE CONTROL)
275		. Valved clearance chamber
276		. . Connectable clearance chambers of opposed pump chambers
277		. . Plural chambers connected to single pump chamber
278		EXTERNAL CONDITION RESPONSIVE PUMPED FLUID CONTROL
279		WITH CONDITION RESPONSIVE PUMPED FLUID CONTROL
280		. Responsive to pump created drive motor condition
281		. Lubricant condition responsive
282		. Plural separate sensing means for a single fluid controller
283		. Bypass or relief valve controls venting by movable pump chamber part
284		. Bypass or relief valve carried by movable pumping member
285		. Valve passage directly connecting concurrently contracting and expanding nonrotary pump chambers
286		. Plural pump units with individual or relative control
287		. . Diverse capacity pumps
288		. . Sequentially operated separate relief or bypass passages
289		. Variable cutoff or pumping member controlled port
290		. Having timer or delay means for fluid controller
291		. Reversibly driven pump having bypass active in either flow direction
292		. Pumped fluid temperature responsive
293		. Driven pump part speed responsive
294		. . Centrifugally actuated
295		. Inlet throttle or stop valve
296		. Bypass or relief valve part carried by or carries distributor part
297		. Expansible chamber pump distributor operation modified
297.5		. . Liquid level responsive
298		. . Inlet valve
299		. Normally open bypass or relief passage closed by increased pressure or flow
300		. Fluid flow rate responsive
301		. Inlet pressure increase opens bypass from pump inlet to discharge
302		. Plural paths having individual condition responsive control means
303		. . Sequentially opened main line and bypass or relief paths
304		. . Plural bypass or relief paths
305		. Manual actuation of condition responsive valve
306		. Pump inlet or pump chamber vented to ambient (e.g., vacuum breaker)
307		. Pressure responsive relief or bypass valve
308		. . Having additional relief or bypass valve
309		. . Responsive to pump inlet condition
310		. . Rotary expansible chamber pump
311		. . Adjustable spring loaded valve
312		WITH MUFFLER ACTING ON PUMP FLUID
313		COMBINED
314		SINGLE ACTING CHANGEABLE TO OR FROM DOUBLE ACTING
315		REVERSE FLOW WITH UNIDIRECTIONAL DRIVE OR UNIDIRECTIONAL FLOW WITH REVERSE DRIVE
316