ITRE20080069A1 - '' PUMPING GROUP FOR PISTON PUMPS FOR HYDRO-CLEANING MACHINES '' - Google Patents
'' PUMPING GROUP FOR PISTON PUMPS FOR HYDRO-CLEANING MACHINES ''Info
- Publication number
- ITRE20080069A1 ITRE20080069A1 IT000069A ITRE20080069A ITRE20080069A1 IT RE20080069 A1 ITRE20080069 A1 IT RE20080069A1 IT 000069 A IT000069 A IT 000069A IT RE20080069 A ITRE20080069 A IT RE20080069A IT RE20080069 A1 ITRE20080069 A1 IT RE20080069A1
- Authority
- IT
- Italy
- Prior art keywords
- ptfe
- gasket
- pumping unit
- piston
- sealing
- Prior art date
Links
- 238000005086 pumping Methods 0.000 title claims description 16
- 238000004140 cleaning Methods 0.000 title 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 19
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 18
- 238000001125 extrusion Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 229910000906 Bronze Inorganic materials 0.000 claims description 6
- 239000010974 bronze Substances 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000012764 mineral filler Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 241001311547 Patina Species 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
- F04B53/164—Stoffing boxes
-
- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B1/141—Details or component parts
-
- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B1/141—Details or component parts
- F04B1/143—Cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/002—Sealings comprising at least two sealings in succession
- F16J15/004—Sealings comprising at least two sealings in succession forming of recuperation chamber for the leaking fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/166—Sealings between relatively-moving surfaces with means to prevent the extrusion of the packing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
- F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0469—Other heavy metals
- F05C2201/0475—Copper or alloys thereof
- F05C2201/0478—Bronze (Cu/Sn alloy)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/04—PTFE [PolyTetraFluorEthylene]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/06—Polyamides, e.g. NYLON
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2251/00—Material properties
- F05C2251/14—Self lubricating materials; Solid lubricants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/04—Composite, e.g. fibre-reinforced
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Reciprocating Pumps (AREA)
Description
DESCRIZIONE DESCRIPTION
del Brevetto Italiano per Invenzione Industriale dal titolo: of the Italian Patent for Industrial Invention entitled:
“GRUPPO POMPANTE PER POMPE A PISTONI PER IDROPULITRICI” "PUMPING UNIT FOR PISTON PUMPS FOR HIGH PRESSURE WASHERS"
La presente invenzione si riferisce ad un gruppo pompante per pompe a pistoni ad alta pressione ad esempio per idropulitrici. The present invention refers to a pumping unit for high pressure piston pumps, for example for high pressure cleaners.
Nei gruppi pompanti ad alta pressione è consolidato l'impiego sul pistone di un doppio sistema di tenuta costituito da una guarnizione a "V" in gomma-tela per la tenuta dell'alta pressione e una guarnizione a "C" in gomma per la tenuta secondaria di bassa pressione delle perdite. In high pressure pumping units, the use of a double sealing system on the piston is consolidated, consisting of a rubber-cloth "V" gasket for high pressure sealing and a rubber "C" gasket for sealing secondary low pressure leaks.
Una soluzione nota di tal genere è illustrata in figura 1. A known solution of this kind is illustrated in Figure 1.
La guarnizione secondaria, man mano che si usura, consente trafilamenti di fluido (acqua). The secondary seal, as it wears, allows fluid (water) to leak.
Le microperdite dovute al trafilamento, entrando in contatto con l'aria si asciugano, e formano sul pistone una patina solida dovuta al calcare e alle sostanze in sospensione nel fluido. Micro-leaks due to leakage, upon coming into contact with the air, dry up and form a solid patina on the piston due to limestone and suspended substances in the fluid.
Col tempo la patina solida radiale che aderisce al pistone aumenta di spessore e con il movimento alternativo dello stesso abrade il labbro di tenuta della guarnizione. Over time the solid radial patina that adheres to the piston increases in thickness and with the reciprocating movement of the same abrades the sealing lip of the gasket.
Questa usura causa un aumento delle perdite e il gocciolamento può penetrare all'interno del corpo pompa, pregiudicando la lubrificazione delle parti meccaniche. This wear causes an increase in leaks and dripping can penetrate inside the pump body, compromising the lubrication of the mechanical parts.
Inoltre, la guarnizione secondaria che è sensibilmente stretta sul pistone, durante il movimento dello stesso tende a deformarsi e a sfaldarsi secondo un fenomeno conosciuto come estrusione. Per evitare questo fenomeno la guarnizione è appoggiata ad un anello esterno detto anello antiestrusione. Furthermore, the secondary seal, which is noticeably tight on the piston, tends to deform and flake off during its movement according to a phenomenon known as extrusion. To avoid this phenomenon, the gasket rests on an outer ring called anti-extrusion ring.
Uno scopo della presente invenzione è quello di superare i succitati inconvenienti, mediante un gruppo pompante che comprende mezzi per impedire la formazione della suddetta patina solida e la estrusione della guarnizione secondaria. An object of the present invention is to overcome the aforementioned drawbacks, by means of a pumping unit which comprises means for preventing the formation of the aforementioned solid patina and the extrusion of the secondary gasket.
Altro scopo dell’invenzione è quello di rendere disponibile un gruppo pompante nel quale i suddetti mezzi siano di ingombro limitato, abbiano durata superiore ai mezzi noti e siano di semplice ed economica realizzazione. Another purpose of the invention is to make available a pumping unit in which the aforementioned means are of limited size, have a longer life than the known means and are simple and economical to manufacture.
Un ulteriore scopo dell’invenzione è di eliminare la necessità di lubrificare le guarnizioni con grassi al silicone o al bisolfuro di molibdeno che, oltre all’alto costo presentano l’inconveniente di inquinare l’ambiente in quanto la quantità in eccesso viene dilavata e finisce in fogna. A further object of the invention is to eliminate the need to lubricate the gaskets with silicone or molybdenum disulphide greases which, in addition to the high cost, have the drawback of polluting the environment as the excess quantity is washed away and ends in the sewer.
Detti scopi vengono raggiunti dall’invenzione rendendo disponibile un sistema di tenuta per gruppi pompanti per idropulitrici, come definito nelle rivendicazioni. Said purposes are achieved by the invention by making available a sealing system for pumping units for pressure washers, as defined in the claims.
Detto sistema di tenutane, secondo il trovato, comprendente una guarnizione primaria per la tenuta dell'alta pressione e una guarnizione secondaria per la tenuta secondaria di bassa pressione delle perdite, nella quale la suddetta guarnizione secondaria comprende un primo componente atto sia a fornire tenuta contro le perdite, sia a trattenere elasticamente tra di essa e la superficie del pistone un secondo componente di tenuta costituito da un anello antiestrusione. Said sealing system, according to the invention, comprising a primary gasket for sealing the high pressure and a secondary gasket for the secondary low pressure sealing of leaks, in which the aforementioned secondary gasket comprises a first component capable of providing a seal against leaks, and to elastically retain between it and the surface of the piston a second sealing component consisting of an anti-extrusion ring.
In particolare la suddetta guarnizione secondaria presenta una sede per alloggiare detto anello, detta sede essendo posta sul lato del pistone affacciato alla zona a bassa pressione. In particular, said secondary gasket has a seat for housing said ring, said seat being placed on the side of the piston facing the low pressure zone.
L’anello antiestrusione è preferibilmente realizzato in un materiale scelto tra PTFE (politetrafluoroetilene); PTFE caricato con bronzo, preferibilmente con da 40 a 60% di bronzo; PTFE caricato con carbone, preferibilmente con 25% di carbone; materiali plastici stampabili ad iniezione come PA 66 caricato con fibre di vetro e PTFE; POM caricato con PTFE; PSU caricato con grafite ed eventuali cariche minerali. The anti-extrusion ring is preferably made of a material chosen from PTFE (polytetrafluoroethylene); PTFE filled with bronze, preferably with 40 to 60% bronze; Carbon filled PTFE, preferably with 25% carbon; injection moldable plastic materials such as PA 66 filled with glass fibers and PTFE; POM loaded with PTFE; PSU loaded with graphite and any mineral fillers.
Inoltre i suddetti componenti sono rivestiti con un trattamento di teflonatura, che consiste nel riportare su di essi un sottile strato di sostanze lubroattive simile a vernice che conferisce proprietà autolubrificanti che riducendo il coefficiente di attrito migliorano il rendimento della pompa e prevengono usura e danneggiamenti in caso di funzionamento a secco. Furthermore, the aforementioned components are coated with a Teflon treatment, which consists in bringing on them a thin layer of lubricating substances similar to paint which confers self-lubricating properties which by reducing the friction coefficient improve the efficiency of the pump and prevent wear and damage in case dry running.
Ulteriori caratteristiche e vantaggi dell’invenzione risulteranno evidenti dalla lettura della descrizione seguente fornita a titolo esemplificativo e non limitativo, con l’ausilio delle figure illustrate nelle tavole allegate, in cui: Further features and advantages of the invention will become evident from reading the following description provided by way of non-limiting example, with the aid of the figures illustrated in the attached tables, in which:
- la figura 1 illustra un gruppo pompante secondo la tecnica nota; e Figure 1 illustrates a pumping unit according to the known art; And
- la figura 2 illustra un gruppo pompante secondo la presente invenzione. Figure 2 illustrates a pumping unit according to the present invention.
In figura 1, a scopo comparativo, è illustrata la situazione della tecnica nota: un pistone 10, composto da un nucleo 101 di acciaio e da una camicia 102 in ceramica, appartenente ad un pompa a pistoni per un’idropulitrice, prevede una guarnizione primaria a “V” in gomma-tela, indicata con 12, per la tenuta dell'alta pressione e una guarnizione secondaria a “C” in gomma, indicata con 20, per la tenuta secondaria delle perdite a bassa pressione. In figure 1, for comparative purposes, the situation of the known art is illustrated: a piston 10, composed of a steel core 101 and a ceramic jacket 102, belonging to a piston pump for a pressure washer, has a primary seal rubber-cloth “V”, indicated with 12, for high pressure sealing and a secondary rubber “C” gasket, indicated with 20, for secondary sealing of low pressure leaks.
La guarnizione secondaria 20 è contenuta nella sede di un anello 25 che comprende una parete 251 atta a limitare l’estrusione della guarnizione 20. The secondary gasket 20 is contained in the seat of a ring 25 which includes a wall 251 designed to limit the extrusion of the gasket 20.
In figura 2 è visibile un gruppo pompante secondo il trovato comprendente la guarnizione 200 comprendente un primo componente 21, atto sia a fornire tenuta contro le perdite, sia a trattenere elasticamente un secondo componente di tenuta, composto da un anello antiestrusione 22. Figure 2 shows a pumping unit according to the invention comprising the gasket 200 comprising a first component 21, able both to provide sealing against leaks and to elastically retain a second sealing component, consisting of an anti-extrusion ring 22.
In particolare, la guarnizione secondaria presenta una sede 23 per alloggiare l’anello antiestrusione 22, detta sede essendo posta sul lato a bassa pressione del pistone 10. In particular, the secondary gasket has a seat 23 to house the anti-extrusion ring 22, said seat being placed on the low pressure side of the piston 10.
Inoltre il complesso di elementi costituito dal primo componente 21 e dall’anello 22 è a sua volta mantenuto in posizione da un elemento di ritegno anulare 25. Furthermore, the set of elements consisting of the first component 21 and the ring 22 is in turn held in position by an annular retaining element 25.
L’anello 22 è realizzato in un materiale che impedisce l’estrusione del primo componente 21 della guarnizione, ovvero la possibilità che esso o parte di esso, a causa degli attriti, possa uscire dalla sede a cui è destinato, con conseguente perdita delle capacità di tenuta del sistema e danneggiamento dell’anello. The ring 22 is made of a material that prevents the extrusion of the first component 21 of the gasket, i.e. the possibility that it or part of it, due to friction, can come out of the seat for which it is intended, with consequent loss of capacity. sealing of the system and damage to the ring.
L’anello 22 è preferibilmente realizzato in uno dei seguenti materiali: PTFE (politetrafluoroetilene); PTFE caricato con bronzo, preferibilmente con da 40 a 60% di bronzo; PTFE caricato con carbone, preferibilmente con 25% di carbone; materiali plastici stampabili ad iniezione come PA 66 caricato con fibre di vetro e PTFE; POM caricato con PTFE; PSU caricato con grafite ed eventuali cariche minerali. The ring 22 is preferably made of one of the following materials: PTFE (polytetrafluoroethylene); PTFE filled with bronze, preferably with 40 to 60% bronze; Carbon filled PTFE, preferably with 25% carbon; injection moldable plastic materials such as PA 66 filled with glass fibers and PTFE; POM loaded with PTFE; PSU loaded with graphite and any mineral fillers.
Una funzione primaria dell'anello 22 in PTFE è quella di tenere pulita la zona del pistone ceramico dietro alla tenuta a "C", impedendo la formazione della patina solida che abrade il labbro della guarnizione. A primary function of the PTFE ring 22 is to keep the ceramic piston area behind the "C" seal clean, preventing the formation of the solid patina that abrades the seal lip.
Tale zona infatti, a causa del movimento del pistone 10, viene ripulita dalle eventuali microperdite per raschiamento da parte dell’anello 22. In fact, this area, due to the movement of the piston 10, is cleaned of any micro-leaks due to scraping by the ring 22.
Inoltre l'anello 22 è posto in modo elastico sul pistone ed è mantenuto elasticamente in posizione dal primo componente 21 e costituisce di fatto una terza tenuta a barriera che impedisce l'entrata di acqua nel corpo pompa con conseguente danneggiamento delle parti meccaniche, quali albero, biella e cuscinetti. Furthermore, the ring 22 is placed in an elastic way on the piston and is kept elastically in position by the first component 21 and in fact constitutes a third barrier seal that prevents the entry of water into the pump body with consequent damage to the mechanical parts, such as the shaft. , connecting rod and bearings.
Il gruppo pompante secondo l’invenzione comprende quindi un’unica guarnizione secondaria integrata che, diversamente, si dovrebbe realizzare con due guarnizioni separate. The pumping unit according to the invention therefore includes a single integrated secondary seal which, otherwise, should be made with two separate seals.
Inoltre, il gruppo pompante ha una durata superiore a quella tradizionale, dilatando cosi gli intervalli di manutenzione Furthermore, the pumping unit has a longer life than the traditional one, thus extending the maintenance intervals
Ovviamente all’invenzione così come descritta potranno essere apportate modifiche o migliorie dettate da motivazioni contingenti o particolari, senza per questo uscire dall’ambito dell’invenzione come sotto rivendicata. Obviously, modifications or improvements may be made to the invention as described, dictated by contingent or particular reasons, without thereby departing from the scope of the invention as claimed below.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000069A ITRE20080069A1 (en) | 2008-07-22 | 2008-07-22 | '' PUMPING GROUP FOR PISTON PUMPS FOR HYDRO-CLEANING MACHINES '' |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000069A ITRE20080069A1 (en) | 2008-07-22 | 2008-07-22 | '' PUMPING GROUP FOR PISTON PUMPS FOR HYDRO-CLEANING MACHINES '' |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ITRE20080069A1 true ITRE20080069A1 (en) | 2010-01-23 |
Family
ID=40495909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT000069A ITRE20080069A1 (en) | 2008-07-22 | 2008-07-22 | '' PUMPING GROUP FOR PISTON PUMPS FOR HYDRO-CLEANING MACHINES '' |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | ITRE20080069A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0112959A2 (en) * | 1982-12-08 | 1984-07-11 | Firma Carl Freudenberg | Seal |
| EP0052689B1 (en) * | 1980-11-26 | 1984-07-25 | Firma Carl Freudenberg | Sealing for rods or pistons |
| DE29611935U1 (en) * | 1995-07-14 | 1996-09-05 | Lavorwash S R L | Swashplate pump construction, especially for water jet cleaning devices |
| JP2003148624A (en) * | 2001-11-08 | 2003-05-21 | Nok Corp | Seal device |
| DE10239943C1 (en) * | 2002-08-30 | 2003-10-30 | Kaercher Gmbh & Co Kg Alfred | Pump for high-pressure cleaning device has reciprocating piston provided with peripheral channel between high-pressure seal and oil seal |
-
2008
- 2008-07-22 IT IT000069A patent/ITRE20080069A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0052689B1 (en) * | 1980-11-26 | 1984-07-25 | Firma Carl Freudenberg | Sealing for rods or pistons |
| EP0112959A2 (en) * | 1982-12-08 | 1984-07-11 | Firma Carl Freudenberg | Seal |
| DE29611935U1 (en) * | 1995-07-14 | 1996-09-05 | Lavorwash S R L | Swashplate pump construction, especially for water jet cleaning devices |
| JP2003148624A (en) * | 2001-11-08 | 2003-05-21 | Nok Corp | Seal device |
| DE10239943C1 (en) * | 2002-08-30 | 2003-10-30 | Kaercher Gmbh & Co Kg Alfred | Pump for high-pressure cleaning device has reciprocating piston provided with peripheral channel between high-pressure seal and oil seal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6373372B2 (en) | Radial shaft seal | |
| JPWO2014021179A1 (en) | Sealing device | |
| ITTO960933A1 (en) | SEALING COMPLEX FOR A MOVING MECHANICAL ORGAN, IN PARTICULAR FOR A ROTARY SHAFT OF A HYDRAULIC PUMP | |
| CN203847704U (en) | Sealing device | |
| CN102767624A (en) | Combined sealing part and kinematical sealing structure | |
| ITRE20080069A1 (en) | '' PUMPING GROUP FOR PISTON PUMPS FOR HYDRO-CLEANING MACHINES '' | |
| BR112014023376A8 (en) | RADIAL SHAFT SEALING WITH HYDRODYNAMIC AND STATIC SEALING FEATURES | |
| CN103410976A (en) | Durable washing machine seal ring | |
| CN104344124A (en) | Rotating joint for liquid loading/unloading arm | |
| JP4026640B2 (en) | Piston cylinder sealing device | |
| CN202971284U (en) | Centrifugal pump shaft | |
| CN210715948U (en) | Mechanical shaft seal structure for speed reducer | |
| CN212131302U (en) | High-speed wear-resistant oil seal | |
| CN104728450A (en) | High-strength oil seal | |
| CN203051506U (en) | Three-point-contact sealing bearing | |
| CN202955022U (en) | Packing seal structure of centrifugal pump | |
| CN105422861A (en) | Packing seal structure internally provided with reinforcing rings | |
| CN201265548Y (en) | Water pump sealing device | |
| CN204852343U (en) | Novel take dust ring of flank | |
| RU2389573C1 (en) | Squeezer roller support seal | |
| CN205859155U (en) | Hydrodynamic piston shaft sealing part | |
| CN103629079A (en) | Water-lubricated air pump | |
| CN211715727U (en) | Mechanical shaft seal structure for speed reducer | |
| CN219549598U (en) | Rubber sealing ring | |
| CN208396992U (en) | A kind of water pump packing part |