EP0317716B1 - Suction and force plunger pump - Google Patents
Suction and force plunger pump Download PDFInfo
- Publication number
- EP0317716B1 EP0317716B1 EP88114447A EP88114447A EP0317716B1 EP 0317716 B1 EP0317716 B1 EP 0317716B1 EP 88114447 A EP88114447 A EP 88114447A EP 88114447 A EP88114447 A EP 88114447A EP 0317716 B1 EP0317716 B1 EP 0317716B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- ring
- packing
- pumping chamber
- sealing device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005086 pumping Methods 0.000 claims description 16
- 230000008878 coupling Effects 0.000 claims description 14
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/109—Valves; Arrangement of valves inlet and outlet valve forming one unit
- F04B53/1092—Valves; Arrangement of valves inlet and outlet valve forming one unit and one single element forming both the inlet and outlet closure member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1097—Valves; Arrangement of valves with means for lifting the closure member for pump cleaning purposes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
- F04B53/147—Mounting or detaching of piston rod
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
- F04B53/166—Cylinder liners
Definitions
- the present invention relates to a hydraulic suction and force plunger pump adapted to operate at high pressures particularly for injecting cement mixtures to improve the mechanical and hydraulic characteristics of the soil.
- Reciprocating pumps with multiple cylinders arranged side by side in a line, with a respective single-action suction and force plunger sliding in each cylinder, are already used in consolidating or waterproofing the soil by means of high pressure cement injection.
- the plungers are actuated by a single crankshaft by means of respective cross-head connecting rods.
- a double acting multicylinder mud pump having a hydraulic powered piston in a cylinder which connects with a piston rod, which in turn drives a second piston in a cylinder to pump fluid mud.
- the first piston is driven by hydraulic oil delivered under pressure to intake manifolds through independently driven val- ving apparatus which times the delivery of the hydraulic fluid for the main power stroke and further times the discharge of the hydraulic fluid for the return secondary power stroke, the system being controlled independently of piston action in timing of multiple pistons in multiple cylinders by the valve system.
- the aim of the present invention is therefore to improve the structure of plunger pumps so as to make their manufacture and their use more economical and facilitate and speed the replacement of worn parts and the restoration of the best efficiency and durability conditions.
- an object of the invention is to provide a pump wherein the packing-gland sealing device and plunger which can be simply and rapidly replaced even at the worksite where the pump is used.
- the pump has a body which is longitudinally separated into three box-like parts 1, 2 and 3, removably associated for example by means of screw elements 4 and 5.
- the body rests on the ground directly with the part 1 and with elements 6 protruding downwards from the part 3 which is the least high of the three abovementioned parts.
- the interior of part 1 is connected to the interior of the central part 2 by means of wide vertical openings 7 and, starting from the related wall which is transverse to the pump, is downwardly tapered.
- the axis of the horizontal crankshaft 9, having in particular three cranks keyed at 120 degrees to one another, is arranged in the transverse plane 8 which separates parts 1 and 2.
- end supports 10 of the shaft 9 are applied both to the end part 1 and to the central one 2, at the co-planer faces thereof which are vertical and longitudinal to the pump and also at openings which affect, in said lateral faces, part 1 for half of their extension and part 2 for the other half; similarly, half of the main bearings, not illustrated, correspond to part 1 and the other half to part 2.
- Each of the big ends of connecting rods 11 is articulated to the respective crank of the crankshaft 9; by means of a pin 12, the small end of each connecting rod 11 is then articulated to the body 13 of a cross-head 14 having skids, the guides 15 whereof are mounted within the central part 2 of the pump body.
- a respective stem 16 is fixed to the body 13 of each cross-head and penetrates into the other end part 3, passing through a gasket- ed ring 17 which is applied to the wall dividing parts 2 and 3.
- Each stem 16 has a plunger 18 of the suction and force and single-action type.
- the stems and the respective plungers, which extend longitudinally with respect to the pump, are connected to one another by quick couplings 19 of the collar type.
- each stem 16 and of each plunger 18 have a truncated-cone configuration, diverging towards each other, and are closed and locked by two- collar elements 20 which have an inner groove 20a with a configuration which is complementary to that of said ends. Proximate to their separation plane, the two half-collars 20 furthermore have superimposed tabs which, mutually hinged at pivot 21 and are furthermore locked at the opposite position by a screw element 22. Access to the couplings 19 is gained through openings 23 with which the upper face of part 3 of the body is provided: naturally, in order to rapidly open the couplings and release the stems 16 from the plungers 18, the elements 22 should be conveniently positioned upwards, as shown in the figures.
- the openings 23 are normally closed by a cover 24 which is pivoted to the central part 2 at pivot 25.
- the respective openings of the lateral faces of said part 2 are closed by hatches 26; the front openings of the end part 1 are closed by hatches 27 and 28.
- a block 29 is rigidly associated with the front of part 3, and as many pump chambers 31 as there are plungers 18 are defined therein side by side and in a row at respective longitudinal through seats 30; each of said plungers enters its respective pumping chambers at a sealing device 32 with packing gland 33, the gasket element and casing whereof are respectively indicated at 34 and 35.
- the casing 35 is largely external to the block 29 and protrudes towards the coupling 19; inside said block it practically lines the pumping chamber 31 and, in the region opposite to the coupling 10, it forms a sort of dome 35a and ends with an external protrusion which has a groove 36.
- a ring 37 screwed into the threaded hole of a respective part 38, is axially but not tangentially engaged hereat with the casing, and is fixed to the block 29, by means of screw elements 39, and at the opening which is opposite to the coupling 19 in the respective seat 30.
- the ring 37 is conveniently provided with a series of external radial pins 40; the ring and the groove 36 are coaxial to their respective seat 30.
- the bottom 41 of the ring is configured, in its plane, in the shape of a fork, defining the radial slot 41 a which is sufficiently wide and long to allow the extraction of the casing 35 from the ring when the latter is moved eccentrically with respect to the former.
- the ring 37 normally ensures the locking of the respective pumping chamber 31 and therefore of the respective casing 35 in the block 29; the ring, acting on the dome 35a, in fact locks the shoulder 35b of the casing 35 against a related shoulder of the seat 30, with gaskets 42 and 43 interposed.
- the suction valve 44 and the delivery valve 45 of a pumping chamber 31 are substantially configured according to a common alignment which is perpendicular to the axis of the respective plunger 18: in practice this alignment is vertical and the two valves are respectively above and below the block 29 and are arranged in related small blocks 46 and 37 fixed to said block with screw elements 48. According to this alignment, the small blocks are traversed by a hole with a threaded outward portion for the coupling of a respective ring connection 40 and 50 which has actuation pins 51 and is then connected to the chamber 31 by a respective passage 52 and 53 which corresponds to a port of the casing 35.
- Both valves comprise a shutter which is generally indicated at 54 and has a stem 54a and a terminal pointed expansion 54b which has a groove for the accommodation of a gasket 55 for sealing and shock-absorption against the seat 56.
- Both valves also comprise a guide 57, with bushes 58 interposed, for the sliding of the shutter stem 54a; a sleeve 59 surrounds the guide and is connected thereto by means of spoke elements 60.
- a retention spring 61 is interposed between the spokes 60 and the expansion 54b of the respective shutter.
- the seat 56 which is outwardly conical, is provided in a recess of the ring-like connection 49; with reference to the valve 45, said seat is instead provided in a recess of the small block 47.
- connection 49 and 50 lock an end shoulder of the respective sleeve 59 against a shoulder of the respective blocks 46 and 47, with a gasket 62 interposed.
- the portion 63 of the delivery duct, leading out of the connection 50 and connected thereto with a screw coupling, is substantially flexible and has a wide radius of curvature; the various portions 63 then converge into a single duct.
- Each connection 44 has a flanged inlet removably connected to a respective branching of the suction duct 64.
- the adopted solution allows to achieve a cement-mixture circuit which has no deviations or tortuous paths; this yields an improved volumetric efficiency of the pump and a simplification of the delivery and suction valves; the problems of degradation of the pumped mixtures which occur due to sharp flow variations are avoided.
- the rapidity of the replacement of said valves should also be noted.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
- Mechanical Sealing (AREA)
Description
- The present invention relates to a hydraulic suction and force plunger pump adapted to operate at high pressures particularly for injecting cement mixtures to improve the mechanical and hydraulic characteristics of the soil. Reciprocating pumps with multiple cylinders arranged side by side in a line, with a respective single-action suction and force plunger sliding in each cylinder, are already used in consolidating or waterproofing the soil by means of high pressure cement injection. The plungers are actuated by a single crankshaft by means of respective cross-head connecting rods.
- Known from US-A-4,500,267 is a double acting multicylinder mud pump having a hydraulic powered piston in a cylinder which connects with a piston rod, which in turn drives a second piston in a cylinder to pump fluid mud. The first piston is driven by hydraulic oil delivered under pressure to intake manifolds through independently driven val- ving apparatus which times the delivery of the hydraulic fluid for the main power stroke and further times the discharge of the hydraulic fluid for the return secondary power stroke, the system being controlled independently of piston action in timing of multiple pistons in multiple cylinders by the valve system.
- Also known from US-A-2,655,870 is a reciprocating pump as defined in the precharacterizing part of
claim 1. - The mechanism hitherto used for such pumps causes various disadvantages, and in particular it makes them expensive to operate and to be manufactured.
- Furthermore, maintenance operations for replacing worn packing-gland sealing devices and plungers in such known pumps are relatively complicated, time consuming, and difficult to carry out at the work site where the pump is being used.
- The aim of the present invention is therefore to improve the structure of plunger pumps so as to make their manufacture and their use more economical and facilitate and speed the replacement of worn parts and the restoration of the best efficiency and durability conditions.
- Within this aim, an object of the invention is to provide a pump wherein the packing-gland sealing device and plunger which can be simply and rapidly replaced even at the worksite where the pump is used.
- This aim and this object are achieved by a hydraulic pump as defined in
claim 1. - Further characteristics and advantages of the invention will become apparent from the detailed description of a preferred embodiment of the pump, illustrated only by way of non-limitative example in the accompanying drawings, wherein:
- figure 1 is a partially cutout overall plan view of the pump;
- figure 2 is a longitudinal vertical sectional view of the pump;
- figure 3 is a view similar to figure 2, illustrating the detail of a pumping chamber.
- With reference to the above described figures, the pump has a body which is longitudinally separated into three box-
like parts 1, 2 and 3, removably associated for example by means ofscrew elements 4 and 5. - The body rests on the ground directly with the
part 1 and withelements 6 protruding downwards from the part 3 which is the least high of the three abovementioned parts. The interior ofpart 1 is connected to the interior of the central part 2 by means of wide vertical openings 7 and, starting from the related wall which is transverse to the pump, is downwardly tapered. The axis of thehorizontal crankshaft 9, having in particular three cranks keyed at 120 degrees to one another, is arranged in thetransverse plane 8 which separatesparts 1 and 2. The end supports 10 of theshaft 9 are applied both to theend part 1 and to the central one 2, at the co-planer faces thereof which are vertical and longitudinal to the pump and also at openings which affect, in said lateral faces,part 1 for half of their extension and part 2 for the other half; similarly, half of the main bearings, not illustrated, correspond topart 1 and the other half to part 2. - Each of the big ends of connecting
rods 11 is articulated to the respective crank of thecrankshaft 9; by means of apin 12, the small end of each connectingrod 11 is then articulated to thebody 13 of across-head 14 having skids, theguides 15 whereof are mounted within the central part 2 of the pump body. Arespective stem 16 is fixed to thebody 13 of each cross-head and penetrates into the other end part 3, passing through a gasket-ed ring 17 which is applied to the wall dividing parts 2 and 3. Eachstem 16 has aplunger 18 of the suction and force and single-action type. The stems and the respective plungers, which extend longitudinally with respect to the pump, are connected to one another byquick couplings 19 of the collar type. Thecontiguous ends stem 16 and of eachplunger 18 have a truncated-cone configuration, diverging towards each other, and are closed and locked by two- collar elements 20 which have an inner groove 20a with a configuration which is complementary to that of said ends. Proximate to their separation plane, the two half-collars 20 furthermore have superimposed tabs which, mutually hinged at pivot 21 and are furthermore locked at the opposite position by ascrew element 22. Access to thecouplings 19 is gained throughopenings 23 with which the upper face of part 3 of the body is provided: naturally, in order to rapidly open the couplings and release thestems 16 from theplungers 18, theelements 22 should be conveniently positioned upwards, as shown in the figures. Theopenings 23 are normally closed by acover 24 which is pivoted to the central part 2 atpivot 25. The respective openings of the lateral faces of said part 2 are closed byhatches 26; the front openings of theend part 1 are closed byhatches - A
block 29 is rigidly associated with the front of part 3, and asmany pump chambers 31 as there areplungers 18 are defined therein side by side and in a row at respective longitudinal throughseats 30; each of said plungers enters its respective pumping chambers at asealing device 32 withpacking gland 33, the gasket element and casing whereof are respectively indicated at 34 and 35. Thecasing 35 is largely external to theblock 29 and protrudes towards thecoupling 19; inside said block it practically lines thepumping chamber 31 and, in the region opposite to thecoupling 10, it forms a sort ofdome 35a and ends with an external protrusion which has agroove 36. Aring 37, screwed into the threaded hole of arespective part 38, is axially but not tangentially engaged hereat with the casing, and is fixed to theblock 29, by means ofscrew elements 39, and at the opening which is opposite to thecoupling 19 in therespective seat 30. For its actuation, thering 37 is conveniently provided with a series of externalradial pins 40; the ring and thegroove 36 are coaxial to theirrespective seat 30. For said engagement, thebottom 41 of the ring is configured, in its plane, in the shape of a fork, defining theradial slot 41 a which is sufficiently wide and long to allow the extraction of thecasing 35 from the ring when the latter is moved eccentrically with respect to the former. In fact if thering 37 is unscrewed it pulls therespective sealing device 32 along and out of theblock 29 and therespective plunger 18, if thecoupling 19 is open. In this manner a rapid replacement of said entire device and of said plunger and therefore a rapid and safe restoration of the efficiency of the pump are possible even at the work site, leaving to specialized workshops the execution of the maintenance and the restoration of the elements (in particular thegaskets 34 and the plunger 18) which have worn out due to the heavy stresses to which they are subject. On the other hand thering 37 normally ensures the locking of therespective pumping chamber 31 and therefore of therespective casing 35 in theblock 29; the ring, acting on thedome 35a, in fact locks the shoulder 35b of thecasing 35 against a related shoulder of theseat 30, withgaskets - The
suction valve 44 and thedelivery valve 45 of apumping chamber 31 are substantially configured according to a common alignment which is perpendicular to the axis of the respective plunger 18: in practice this alignment is vertical and the two valves are respectively above and below theblock 29 and are arranged in relatedsmall blocks screw elements 48. According to this alignment, the small blocks are traversed by a hole with a threaded outward portion for the coupling of arespective ring connection actuation pins 51 and is then connected to thechamber 31 by arespective passage casing 35. Both valves comprise a shutter which is generally indicated at 54 and has astem 54a and a terminal pointed expansion 54b which has a groove for the accommodation of agasket 55 for sealing and shock-absorption against theseat 56. Both valves also comprise aguide 57, withbushes 58 interposed, for the sliding of theshutter stem 54a; asleeve 59 surrounds the guide and is connected thereto by means ofspoke elements 60. Aretention spring 61 is interposed between thespokes 60 and the expansion 54b of the respective shutter. With reference to thevalve 44, theseat 56, which is outwardly conical, is provided in a recess of the ring-like connection 49; with reference to thevalve 45, said seat is instead provided in a recess of thesmall block 47. Bothconnections 49 and 50 lock an end shoulder of therespective sleeve 59 against a shoulder of therespective blocks gasket 62 interposed. Theportion 63 of the delivery duct, leading out of theconnection 50 and connected thereto with a screw coupling, is substantially flexible and has a wide radius of curvature; thevarious portions 63 then converge into a single duct. Eachconnection 44 has a flanged inlet removably connected to a respective branching of the suction duct 64. The adopted solution allows to achieve a cement-mixture circuit which has no deviations or tortuous paths; this yields an improved volumetric efficiency of the pump and a simplification of the delivery and suction valves; the problems of degradation of the pumped mixtures which occur due to sharp flow variations are avoided. The rapidity of the replacement of said valves should also be noted. - The division into parts which has been studied for the body of the pump and the differentiation of the elements which constitute the various operating components allow a greater automation of the pump manufacturing operations and a concentration of the most valuable materials in the more highly stressed points.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT8703702A IT1213730B (en) | 1987-11-23 | 1987-11-23 | HYDRAULIC PUMP WITH DIFFERENT PISTON SUCTION-PRESSURE |
IT370287 | 1987-11-23 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0317716A2 EP0317716A2 (en) | 1989-05-31 |
EP0317716A3 EP0317716A3 (en) | 1989-08-09 |
EP0317716B1 true EP0317716B1 (en) | 1991-11-27 |
Family
ID=11111453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88114447A Expired EP0317716B1 (en) | 1987-11-23 | 1988-09-05 | Suction and force plunger pump |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0317716B1 (en) |
DE (1) | DE3866519D1 (en) |
ES (1) | ES2027358T3 (en) |
IT (1) | IT1213730B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106321398A (en) * | 2015-06-24 | 2017-01-11 | 韩文峰 | Plunger pump used for conveying mixed liquid containing particles |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1230274B (en) * | 1989-06-14 | 1991-10-18 | Vitali Spa | CONTROL UNIT FOR PRESSES USED FOR THE EXTRACTION OF COCOA BUTTER, FROM COCOA PASTA. |
DE4314132A1 (en) * | 1993-05-02 | 1994-11-03 | Friedrich Schwald | Piston pump |
GB2287758B (en) * | 1994-03-19 | 1998-06-24 | Hydrair Ltd | Pumps for shear sensitive material |
DE10125669B4 (en) * | 2001-05-25 | 2006-04-27 | Hammelmann Maschinenfabrik Gmbh | Pump, in particular plunger pump |
US8105055B2 (en) | 2009-06-18 | 2012-01-31 | Fiac Tech Services, LLC | Suction manifold mounting for a fluid end for a high-pressure pump |
CN107990022A (en) * | 2017-12-08 | 2018-05-04 | 兰州理工大学 | A kind of flat valve for plunger pump |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2131749A (en) * | 1936-06-29 | 1938-10-04 | Homestead Valve Mfg Co | Pump |
US2655870A (en) * | 1947-10-22 | 1953-10-20 | Union Steam Pump Company | Reciprocating pump for food materials |
US3679332A (en) * | 1970-04-10 | 1972-07-25 | Union Pump Co | Reciprocating piston pump |
US3819303A (en) * | 1973-06-13 | 1974-06-25 | Ecodyne Corp | Relief-release pumps |
US4500267A (en) * | 1981-10-08 | 1985-02-19 | Birdwell J C | Mud pump |
-
1987
- 1987-11-23 IT IT8703702A patent/IT1213730B/en active
-
1988
- 1988-09-05 EP EP88114447A patent/EP0317716B1/en not_active Expired
- 1988-09-05 ES ES198888114447T patent/ES2027358T3/en not_active Expired - Lifetime
- 1988-09-05 DE DE8888114447T patent/DE3866519D1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106321398A (en) * | 2015-06-24 | 2017-01-11 | 韩文峰 | Plunger pump used for conveying mixed liquid containing particles |
Also Published As
Publication number | Publication date |
---|---|
IT8703702A0 (en) | 1987-11-23 |
EP0317716A3 (en) | 1989-08-09 |
IT1213730B (en) | 1989-12-29 |
ES2027358T3 (en) | 1992-06-01 |
EP0317716A2 (en) | 1989-05-31 |
DE3866519D1 (en) | 1992-01-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8550102B2 (en) | Easily replaceable valve assembly for a high pressure pump | |
US20130202458A1 (en) | Pump fluid cylinder including load transfer shoulder and valve seat for same | |
CA2161907A1 (en) | Valve system for capacity control of a screw compressor and method of manufacturing such valves | |
US4184817A (en) | High pressure multi-cylinder pump | |
US4611529A (en) | Axial piston machine constructed in a removable cartridge form to facilitate assembly and disassembly | |
EP0317716B1 (en) | Suction and force plunger pump | |
US3849032A (en) | High pressure reciprocating pump | |
US4239463A (en) | Reciprocating plunger pump with improved liquid end valve assembly | |
US4730991A (en) | Gas actuated proportioning pump | |
CN101939543A (en) | Fluid working machine | |
NO155510B (en) | HYDRAULIC AMPLIFIER. | |
US5655885A (en) | Reciprocating piston pump with modular fluid subassembly | |
US3726612A (en) | Pump | |
US2516708A (en) | Single-acting two-stroke cycle internal-combustion engine | |
US3143075A (en) | Pump | |
US2778315A (en) | Pump for abrasive fluids | |
US3947157A (en) | Single cylinder pump | |
EP3816445A1 (en) | Automatic bidirectional valve and pump provided with said valve | |
US4242063A (en) | High pressure multi-cylinder pump | |
US2349161A (en) | Hydraulic pump | |
US2266585A (en) | Fuel pump | |
JP2959778B2 (en) | Suction / push-up plunger pump | |
US2927431A (en) | Valve for diaphragm pump | |
US4358252A (en) | Diaphragm pumps | |
US3249062A (en) | High speed triplex pump |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): BE CH DE ES FR GB IT LI NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): BE CH DE ES FR GB IT LI NL SE |
|
17P | Request for examination filed |
Effective date: 19890929 |
|
17Q | First examination report despatched |
Effective date: 19900716 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE CH DE ES FR GB IT LI NL SE |
|
REF | Corresponds to: |
Ref document number: 3866519 Country of ref document: DE Date of ref document: 19920109 |
|
ET | Fr: translation filed | ||
ITF | It: translation for a ep patent filed |
Owner name: MODIANO & ASSOCIATI S.R.L. |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2027358 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
EAL | Se: european patent in force in sweden |
Ref document number: 88114447.1 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20010830 Year of fee payment: 14 Ref country code: BE Payment date: 20010830 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20010831 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20010905 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20010911 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20010912 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20010930 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20011025 Year of fee payment: 14 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020905 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020906 Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020906 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020930 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020930 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020930 |
|
BERE | Be: lapsed |
Owner name: *SOILMEC S.P.A. Effective date: 20020930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030401 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030401 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20020905 |
|
EUG | Se: european patent has lapsed | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030603 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20031011 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050905 |