ES2235581B1 - PERFECTION IN THE SILENCERS-BANKING FOR BLOWING GROUPS. - Google Patents
PERFECTION IN THE SILENCERS-BANKING FOR BLOWING GROUPS.Info
- Publication number
- ES2235581B1 ES2235581B1 ES200202795A ES200202795A ES2235581B1 ES 2235581 B1 ES2235581 B1 ES 2235581B1 ES 200202795 A ES200202795 A ES 200202795A ES 200202795 A ES200202795 A ES 200202795A ES 2235581 B1 ES2235581 B1 ES 2235581B1
- Authority
- ES
- Spain
- Prior art keywords
- frame
- whose
- silencer
- sleeve
- tubular body
- 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 - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/083—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using transversal baffles defining a tortuous path for the gases or successively throttling gas flow
-
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/06—Silencing
-
- 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
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M3/00—Portable or wheeled frames or beds, e.g. for emergency power-supply aggregates, compressor sets
Abstract
Perfeccionamientos en los silenciadores-bancada para grupos soplantes. El silenciador-bancada de la invención comprende un cuerpo tubular provisto de pies de apoyo y medios de acoplamiento para el soplante con el filtro y guías para la sujeción del motor. El cuerpo tubular presenta la entrada del aire en posición centrada superiormente y la salida lateral por un extremo axialmente provista de la válvula de retención y una derivación para la válvula de seguridad, dicho cuerpo comprende interior y longitudinalmente un manguito que está mantenido en posición mediante sendos discos espaciados y cortados, fijados al cuerpo, cuyo manguito se encuentra enfrentado a la entrada del aire, cuyos manguito y discos definen a la entrada del aire una cámara esencialmente anular que obliga a realizar al aire filtrado entrante un recorrido arbitrario y zigzagueante hacia la salida, produciendo un efecto antipulsatorio y de silenciador reactivo.Improvements in the silencers-bed for blower groups. The silencer-bed of the invention comprises a tubular body provided with support feet and coupling means for the blower with the filter and guides for securing the motor. The tubular body has the air inlet in a superiorly centered position and the lateral outlet through an axially provided end of the check valve and a bypass for the safety valve, said body internally and longitudinally comprises a sleeve that is held in position by means of two spaced and cut discs, fixed to the body, whose sleeve is facing the air inlet, whose sleeve and discs define an essentially annular chamber at the air inlet that forces an arbitrary and zigzagging path to the exit to the incoming filtered air , producing an antipulsant and reactive silencer effect.
Description
Perfeccionamientos en los silenciadores-bancada para grupos soplantes.Refinements in Silencers-bench for blower groups.
La presente invención tiene por objeto unos perfeccionamientos en los silenciadores-bancada para grupos soplantes.The present invention aims at refinements in the silencer-bench for blower groups.
Los grupos soplantes conocidos comprenden un silenciador que actúa al propio tiempo de bancada del grupo, cuyo silenciador comprende un cuerpo tubular que está provisto de pies de apoyo que incorporan pies elásticos para aminorar la vibración, y junto a un extremo sobresale superiormente desde el interior de dicho cuerpo tubular un cuello rematado por una brida anular que permite el acoplamiento mediante la brida anular respectiva del elemento soplante, el cual sustenta a su vez el filtro de aspiración de aire, y en la zona media cerca del otro extremo, el cuerpo tubular incorpora superiormente dos pares de guías ortogonales que permiten la sujeción del motor eléctrico en cualquier punto del plano, cuyo motor acciona el elemento soplante para que aspire el aire a través del filtro superior e impulsarlo en el interior del silenciador a través del citado cuello.Known blowing groups comprise a silencer that acts at the group's own bench time, whose silencer comprises a tubular body that is provided with feet of support incorporating elastic feet to reduce vibration, and next to one end protrudes superiorly from inside said tubular body a neck topped by an annular flange that allows coupling by means of the respective ring flange of the blowing element, which in turn supports the filter air intake, and in the middle area near the other end, the Tubular body incorporates two pairs of guides orthogonal that allow the clamping of the electric motor in any point on the plane, whose motor drives the blowing element to breathe the air through the upper filter and boost it inside the silencer through said neck.
El silenciador incorpora en el extremo de entrada del aire filtrado una válvula de seguridad, y en el extremo opuesto de salida del aire una válvula de retención.The silencer incorporates at the inlet end of the filtered air a safety valve, and at the end opposite air outlet a check valve.
Hasta el momento, los silenciadores conocidos presentan varios inconvenientes como son, el de presentar principalmente una pulsación y un nivel sonoro importantes, asimismo, incorporan material insonorizante que puede contaminar con lo cual dichos silenciadores contaminan el medio ambiente en varios aspectos, como son vibraciones, nivel sonoro, entre otros.So far, known silencers they present several drawbacks as they are, to present mainly an important pulsation and sound level, they also incorporate soundproofing material that can contaminate whereby said silencers pollute the environment in several aspects, such as vibrations, sound level, between others.
Los citados inconvenientes han sido prácticamente eliminados mediante el silenciador objeto del Modelo de Utilidad n° U 9602973 de la misma solicitante, el cual aminora la pulsación a un nivel residual del 2% (según norma API STANDARD 619), disminuye el nivel sonoro, y elimina material insonorizante, con lo cual prácticamente suprime todo tipo de contaminación.The aforementioned drawbacks have been practically removed by the silencer object of the Utility Model No. 9602973 of the same applicant, which reduces pulsation at a residual level of 2% (according to API STANDARD 619), decreases the sound level, and eliminates soundproofing material, thereby which practically suppresses all types of pollution.
Asimismo, reduce las dimensiones del grupo, racionaliza el montaje, y simplifica el mantenimiento.It also reduces the dimensions of the group, Streamlines assembly, and simplifies maintenance.
Dicho Modelo de Utilidad anterior comprende un tubo coaxial y de menor longitud fijado interiormente en posición intermedia en el cuerpo tubular exterior, que permite la circulación del aire filtrado impulsado por el interior del tubo coaxial interior y entre el cuerpo exterior y el tubo coaxial interior, entrando y saliendo en ambos espacios según un recorrido arbitrario y zigzagueante, y un elemento divisor dispuesto entre el tubo coaxial interior y el cuerpo exterior que divide todo el espacio en dos cámaras de expansión del aire conectadas entre sí a través del tubo coaxial, una primaria o principal mayor y una secundaria menor.Said Previous Utility Model comprises a coaxial and shorter length tube fixed internally in position intermediate in the outer tubular body, which allows the filtered air circulation driven inside the tube internal coaxial and between the outer body and the coaxial tube interior, entering and leaving in both spaces according to a route arbitrary and zigzagging, and a dividing element arranged between the inner coaxial tube and outer body that divides all the space in two air expansion chambers connected to each other at through the coaxial tube, a major primary or major and a junior high school
Los resultados conseguidos mediante el citado Modelo de Utilidad anterior de la solicitante han sido mejorados por la propia solicitante mediante los perfeccionamientos de la presente invención, la cual consigue adicionalmente una notable reducción del espacio y una notable efectividad antipulsatoria, que constituye un silenciador reactivo.The results achieved through the aforementioned Previous utility model of the applicant has been improved by the applicant herself by improving the present invention, which additionally achieves a remarkable space reduction and remarkable anti-impulsive effectiveness, which It constitutes a reactive silencer.
De conformidad con lo anterior, los perfeccionamientos de la presente invención se caracterizan esencialmente porque el cuerpo tubular exterior constitutivo del silenciador presenta la entrada del aire procedente del soplante acoplado al mismo en posición centrada, y se prolonga por un extremo axialmente con menor sección definiendo la salida del aire provista de la válvula de retención y una derivación para la válvula de seguridad, cuyo cuerpo tubular exterior comprende interior y longitudinalmente la disposición de un manguito liso de longitud ostensiblemente menor, que está mantenido en posición mediante sendos discos espaciados cortados por respectivas secantes dimensionadas distintamente y que están fijados en la superficie interior del cuerpo exterior, cuyo manguito se encuentra en el plano principal de dicho cuerpo exterior que comprende la entrada al silenciador y se encuentra enfrentado por su superficie lateral a dicha entrada y descentrado respecto al eje principal longitudinal del cuerpo exterior, cuya disposición del manguito y los dos discos cortados definen a la entrada del aire en dicho cuerpo exterior una cámara esencialmente anular que obliga al aire filtrado impulsado a que se bifurque alrededor del manguito pasando a continuación por las aberturas de los discos hacia ambos lados de dicho cuerpo exterior y pasando por el interior del manguito y de dichas aberturas, realizando un recorrido arbitrario y zigzagueante hacia la salida prevista en el extremo de la citada prolongación, cuya circulación produce un efecto antipulsatorio y de silenciador reactivo.In accordance with the above, the improvements of the present invention are characterized essentially because the outer tubular body constituting the silencer presents the air intake from the blower coupled to it in a centered position, and is extended by a axially end with smaller section defining the air outlet provided with the check valve and a bypass for the safety valve, whose outer tubular body comprises inside and longitudinally the arrangement of a plain sleeve of ostensibly shorter length, which is held in position by two spaced discs cut by respective blotters distinctly sized and fixed on the surface inside of the outer body, whose sleeve is in the main plane of said outer body comprising the entrance to the silencer and is faced by its lateral surface to said input and off-center with respect to the main axis longitudinal of the outer body, whose arrangement of the sleeve and the two cut discs define the air inlet in said outer body an essentially annular chamber that forces the air filtered driven to fork around the sleeve going through the disc openings towards both sides of said outer body and passing through the inside of the sleeve and of said openings, making an arbitrary path and zigzagging towards the planned exit at the end of the aforementioned prolongation, whose circulation produces an antipulsant effect and of reactive silencer.
Según la invención el cuerpo tubular exterior incorpora las guías ortogonales para la sujeción del motor en forma de bastidor asociado a un lateral del mismo según una disposición de marco basculante provista de pies de apoyo, cuyos lados opuestos del marco que están posicionados ortogonales al cuerpo exterior constituyen las citadas guías opuestas de sujeción del motor, cuyo marco está articulado al cuerpo exterior por el lado contiguo al mismo para su basculamiento, el cual está regulado por medios tensores entre el lado opuesto del marco y los pies de apoyo del bastidor.According to the invention the outer tubular body incorporates the orthogonal guides for fastening the motor in shape of frame associated to one side thereof according to an arrangement of tilting frame provided with support feet, whose opposite sides of the frame that are positioned orthogonal to the outer body they constitute the aforementioned opposing guides for securing the motor, whose frame is articulated to the outer body by the side adjacent to the same for its tilting, which is regulated by means tensioners between the opposite side of the frame and the support feet of the frame.
Según la presente invención, los medios tensores consisten en un tensor dispuesto entre un travesaño que une los pies de apoyo espaciados del bastidor y el citado lado opuesto del marco.According to the present invention, the tensioning means they consist of a tensioner arranged between a crossbar that joins the Support feet spaced from the frame and the aforementioned opposite side of the framework.
Estas y otras características se desprenderán mejor de la descripción detallada que sigue, para facilitar la cual se acompaña de una lámina de dibujos en la que se ha representado un caso práctico de realización que se cita solamente a título de ejemplo no limitativo del alcance de la presente invención.These and other features will come off better than the detailed description that follows, to facilitate which It is accompanied by a sheet of drawings in which it has been represented a case study that is cited only by way of non-limiting example of the scope of the present invention.
En dichos dibujos:In these drawings:
La figura 1 es una vista en alzado frontal del silenciador-bancada de la invención.Figure 1 is a front elevation view of the silencer-bed of the invention.
La figura 2 es una vista en alzado lateral del silenciador-bancada de la invención.Figure 2 is a side elevation view of the silencer-bed of the invention.
La figura 3 es una vista en alzado lateral del cuerpo tubular exterior constitutivo del silenciador.Figure 3 is a side elevation view of the External tubular body constituting the silencer.
La figura 4 es una vista en planta del silenciador-bancada.Figure 4 is a plan view of the silencer-bench.
Las figuras 5A y 5B son sendas vistas en sección transversal consideradas por los planos A-A y B-B, respectivamente, de la figura 3.Figures 5A and 5B are section views cross-section considered by the A-A and B-B, respectively, of Figure 3.
De conformidad con los dibujos, los perfeccionamientos en los silenciadores-bancada para grupos soplantes objeto de la presente invención, comprenden un cuerpo tubular exterior con la referencia general (1), que constituye el silenciador, el cual presenta la entrada (2) del aire filtrado (EN) como se indica con la flecha (F1), procedente del soplante (no ilustrado) que se acopla en la valona (3) provista de orificios (4) dispuestos circularmente en la misma, para fijar el soplante, el cual a su vez recibe el aire filtrado del exterior a través del correspondiente filtro (no ilustrado) por el que penetra el aire ambiente. Como se puede observar la citada entrada (2) del aire se encuentra en posición centrada respecto al citado cuerpo tubular (1), el cual se prolonga por un extremo axialmente con menor sección en un tubo (5) que define la salida (6) del aire (SA) indicada con la flecha (F2) en la que está provisto de la válvula de retención (no ilustrada) mediante una valona (7) provista de orificios (7A), y de cuyo tubo parte una derivación (8) que termina en una valona (9) provista de orificios (10) para la fijación de una válvula de seguridad (no ilustrada).In accordance with the drawings, the refinements in the silencer-bench for blower groups object of the present invention, comprise a outer tubular body with the general reference (1), which constitutes the silencer, which presents the air inlet (2) filtered (EN) as indicated by arrow (F1), coming from blower (not shown) that fits into the wall (3) provided with holes (4) arranged circularly therein, to fix the blower, which in turn receives the filtered air from outside to through the corresponding filter (not shown) through which it penetrates ambient air As you can see the mentioned entry (2) of the air is in a centered position with respect to said body tubular (1), which extends along one end axially with smaller section in a tube (5) that defines the air outlet (6) (SA) indicated by the arrow (F2) on which the valve is provided of retention (not illustrated) by a wall (7) provided with holes (7A), and from whose tube a branch (8) ends in a wall (9) provided with holes (10) for fixing a safety valve (not illustrated).
El citado cuerpo tubular exterior (1) comprende interior y longitudinalmente (ver las figuras 5A, 5B y especialmente la figura 1), la disposición de un manguito liso (11) que es liso y de longitud ostensiblemente menor, el cual está mantenido en posición mediante sendos discos espaciados (12) y (13), los cuales están cortados por respectivas secantes (12a) y (13a) que están dimensionadas distintamente (como se observa en las figuras 1, 5A y 5B), cuyos discos (12) y (13) están fijados, como por ejemplo mediante soldaduras respectivas (14) y (15) a la superficie interior del citado cuerpo tubular exterior (1), como se observa en las figuras el citado manguito (11) se encuentra situado en el plano principal de dicho cuerpo exterior, que comprende la entrada (EN) del aire filtrado al silenciador, y que se encuentra enfrentado por su superficie lateral (11a) a dicha entrada (EN) del aire filtrado y que está descentrado con respecto al eje geométrico principal longitudinal (e) del citado cuerpo tubular exterior (1).Said outer tubular body (1) comprises internally and longitudinally (see figures 5A, 5B and especially Figure 1), the arrangement of a plain sleeve (11) that is smooth and ostensibly shorter in length, which is maintained in position by means of two spaced discs (12) and (13), which are cut by respective secants (12a) and (13a) that are distinctly sized (as seen in Figures 1, 5A and 5B), whose discs (12) and (13) are fixed, such as by respective welding (14) and (15) to the surface inside of said outer tubular body (1), as seen in the figures said sleeve (11) is located in the main plane of said outer body, which comprises the entrance (EN) of the filtered air to the silencer, and that is faced by its lateral surface (11a) to said entrance (EN) of the filtered air and that is off-center with respect to the geometric axis longitudinal main (e) of said outer tubular body (one).
La disposición del manguito (11) y los dos discos (12) y (13) cortados en secante definen a la entrada del aire (EN) en dicho cuerpo exterior, una cámara (CA) esencialmente anular que obliga al aire filtrado entrante (A) impulsado por el soplante, a que se bifurque alrededor de dicho manguito, realizando un recorrido por el interior del cuerpo tubular exterior (1) pasando por las aberturas (16) y (17) respectivamente de los citados discos (12) y (13), hacia ambos extremos del citado cuerpo exterior, como se indica esquemáticamente en las líneas de trazos (F2) y pasando por el interior del propio manguito (11) y de dichas aberturas (16) y (17), realizando el aire filtrado (A), en definitiva, por el interior del cuerpo tubular (1), un recorrido arbitrario y zigzagueante hacia la salida (SA) prevista en el extremo de la citada prolongación en correspondencia con la valona (7). De manera que dicha circulación arbitraria y zigzagueante produce un efecto antipulsatorio y de silenciador reactivo.The arrangement of the sleeve (11) and the two disks (12) and (13) cut in secant define the input of the air (EN) in said outer body, a chamber (AC) essentially annular that forces the incoming filtered air (A) driven by the blower, to fork around said sleeve, taking a tour of the inside of the outer tubular body (1) through the openings (16) and (17) respectively of the said discs (12) and (13), towards both ends of said body exterior, as indicated schematically in dashed lines (F2) and through the inside of the sleeve itself (11) and of said openings (16) and (17), making the filtered air (A), in definitively, through the interior of the tubular body (1), a route arbitrary and zigzagging towards the exit (SA) provided in the end of the aforementioned extension in correspondence with the Walloon (7). So that arbitrary and zigzagging circulation It produces an antipulsant and reactive silencer effect.
El cuerpo tubular exterior (1) de la invención incorpora las guías ortogonales (18) y (19) para sujetar el motor (no ilustrado), estando constituidas las citadas guías en un bastidor (20) que está asociado a un lateral del cuerpo tubular (1). Dicho bastidor (20), constituye una disposición de marco basculante (21) que está provisto de pies de apoyo (22) y (23), cuyo marco es basculante respecto al cuerpo tubular (1) mediante sendas articulaciones (24) y (25), montadas en placas (26) y (27) y soldadas a dicho cuerpo (1) por el lado contiguo al del citado marco para su basculamiento, el cual está regulado por medios tensores con la referencia general (28), que comprenden una biela (29) que está articulada por el extremo superior en (30) fija giratoriamente en el travesaño (31) extremo del citado marco, y por el extremo inferior (32) a una barra transversal de unión (33) que une los pies de apoyo (22) y (23) del bastidor, cuya articulación inferior es regulable a tensión mediante la disposición (34) de tensores y mediante sendas tuercas opuestas.The outer tubular body (1) of the invention incorporates orthogonal guides (18) and (19) to hold the engine (not illustrated), said guides being constituted in a frame (20) that is associated with a side of the tubular body (one). Said frame (20) constitutes a frame arrangement swingarm (21) which is provided with support feet (22) and (23), whose frame is tilting with respect to the tubular body (1) by two joints (24) and (25), mounted on plates (26) and (27) and welded to said body (1) on the side adjacent to that mentioned frame for tilting, which is regulated by means tensioners with the general reference (28), which comprise a connecting rod (29) which is articulated by the upper end in (30) fixed rotatably on the crossbar (31) end of said frame, and by the lower end (32) to a crossbar connecting (33) that joins the support feet (22) and (23) of the frame, whose joint lower is tension adjustable by means of the arrangement (34) of tensioners and by means of opposite nuts.
Por su parte, el cuerpo tubular (1) está provisto de los correspondientes pies de apoyo (35) y (36), que completa el silenciador-bancada de la invención.For its part, the tubular body (1) is provided with the corresponding support feet (35) and (36), which complete the silencer-bed of the invention.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200202795A ES2235581B1 (en) | 2002-11-25 | 2002-11-25 | PERFECTION IN THE SILENCERS-BANKING FOR BLOWING GROUPS. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200202795A ES2235581B1 (en) | 2002-11-25 | 2002-11-25 | PERFECTION IN THE SILENCERS-BANKING FOR BLOWING GROUPS. |
Publications (2)
Publication Number | Publication Date |
---|---|
ES2235581A1 ES2235581A1 (en) | 2005-07-01 |
ES2235581B1 true ES2235581B1 (en) | 2006-03-01 |
Family
ID=34707504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES200202795A Expired - Fee Related ES2235581B1 (en) | 2002-11-25 | 2002-11-25 | PERFECTION IN THE SILENCERS-BANKING FOR BLOWING GROUPS. |
Country Status (1)
Country | Link |
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ES (1) | ES2235581B1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB627074A (en) * | 1946-01-26 | 1949-07-27 | Fluor Corp | Improvements in or relating to manifold devices for dampening pressure pulsations ingaseous currents |
DD117905A1 (en) * | 1975-02-24 | 1976-02-05 | ||
DE4041439A1 (en) * | 1990-12-21 | 1992-06-25 | Zwickauer Maschinenfabrik Gmbh | Multi-chamber pressure noise damper - has chambers acting as resonators, formed as single or double half shells, with cover and floor plates of cast material |
GB2268232A (en) * | 1992-06-22 | 1994-01-05 | Hick Hargreaves & Co Ltd | Air blower mounted on chassis with silencer |
FR2746861B1 (en) * | 1996-03-29 | 1998-06-19 | Unite Hermetique | SUCTION MUFFLER SYSTEM FOR REFRIGERATION MOTOR COMPRESSOR |
ES1035669Y (en) * | 1996-11-21 | 1997-11-16 | Construcciones Mecanicas Pedro | BENCH SILENCER FOR BLOWING GROUPS. |
DE19920279C2 (en) * | 1999-05-04 | 2001-05-31 | Sachsenring Maschb Gmbh | Rotary lobe blower system |
-
2002
- 2002-11-25 ES ES200202795A patent/ES2235581B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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ES2235581A1 (en) | 2005-07-01 |
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