Abrégé

A vacuum ejector device (2) for generating at least partial vacuum to be supplied to a gripping member (4), comprising a device body (6) having an elongated shape along a longitudinal axis A. A movable sealing and venting element (24)is provided and is structured to selectively substantially close and seal,in a sealing position,a vacuum duct (16)when the air supply is activated, and to open or vent said vacuum duct to release or vent via a venting duct (26), in a venting position,the vacuum within the gripping member (4)when the vacuum source or air supply is deactivated. The sealing and venting element (24) is arranged essentially at the longitudinal axis A, and that the venting duct (26) is arranged and provides for fluid communication between the sealing and venting element (24) and a venting outlet port (28) provided at a long side of said elongated device body (6).

Classes IPC  ?

• F04F 5/20 - Pompes à jet, p. ex. dispositifs dans lesquels le flux est produit par la chute de pression causée par la vitesse d'un autre fluide le fluide inducteur étant un fluide compressible déplaçant des fluides compressibles pour les évacuer
• F04F 5/44 - Parties constitutives, détails ou accessoires non couverts par les groupes ou présentant un intérêt autre que celui visé par ces groupes
• F04F 5/52 - Commande des pompes d'évacuation

Abrégé

The present invention relates to a handling device (100) for handling foodstuff, comprising a suction cup (10) and a docking piece (30) supporting the suction cup, wherein the suction cup (10) is removably attached to the docking piece (30), wherein the docking piece (30) comprises a drive nozzle (32) inserted into the suction cup (10) attached to the docking piece (30) for ejecting a fluid from the drive nozzle (32) inside of the suction cup (10), and wherein the suction cup (10) comprises a drive opening (14) for receiving the drive nozzle (32) of the docking piece (30), an outlet nozzle (16) having at least one constriction which outlet nozzle (16) is aligned with the drive nozzle (32), so that the drive nozzle (32) and the outlet nozzle (16) cooperate to form an ejector, and a suction opening (12) for applying a suction force provided by the ejector to a surface of the foodstuff to be handled.

Classes IPC  ?

• B65G 47/91 - Dispositifs pour saisir et déposer les articles ou les matériaux comportant des pinces pneumatiques, p. ex. aspirantes
• B66C 1/02 - Éléments ou dispositifs de prise de la charge adjoints aux mécanismes de levage, de descente ou de halage, ou adaptés pour être utilisés avec ces mécanismes et transmettant les efforts à des articles ou à des groupes d'articles par succion

Abrégé

So as to more rapidly accelerate the air flow in a vacuum ejector to supersonic speed whilst focussing the exiting flow of air to downstream of the exit of the nozzle, the invention provides an ejector for generating a vacuum comprising, a drive nozzle for generating a drive jet of air from a compressed air source and directing said drive jet of air into an outlet flow passage at the outlet of a drive stage of the ejector in order to entrain air in a volume surrounding said jet of air into the jet flow to generate a vacuum across said drive stage, wherein said drive nozzle substantially consists of an inlet flow section and an outlet flow section aligned in a direction of air flow through the nozzle, the outlet flow section diverging in the direction of airflow, from an outlet end of the inlet flow section substantially to an exit of the nozzle, the outlet flow section having a shape which is more divergent near the outlet of the inlet flow section and less divergent near the exit of the nozzle.

Classes IPC  ?

• F04F 5/20 - Pompes à jet, p. ex. dispositifs dans lesquels le flux est produit par la chute de pression causée par la vitesse d'un autre fluide le fluide inducteur étant un fluide compressible déplaçant des fluides compressibles pour les évacuer
• F04F 5/46 - Aménagements des tuyères
• F04F 5/22 - Pompes à jet, p. ex. dispositifs dans lesquels le flux est produit par la chute de pression causée par la vitesse d'un autre fluide le fluide inducteur étant un fluide compressible déplaçant des fluides compressibles pour les évacuer du type multiétagé

Abrégé

So as to offer the choice of generating a higher vacuum at quicker response times and less space requirements in a more versatile manner, the invention provides an ejector system comprising: a primary ejector in a drive stage and a booster ejector connected in parallel with said primary ejector for simultaneously generating a vacuum across a booster stage, said booster ejector being configured to generate a vacuum to a lower pressure in said booster stage than is said primary ejector in said drive stage, said booster stage and said drive stage being connected to a common volume to be evacuated and a valve being provided to close the connection between the drive stage and the volume to be evacuated when the pressure in the volume to be evacuated falls below the minimum pressure that can be generated in the drive stage.

Classes IPC  ?

• F04F 5/22 - Pompes à jet, p. ex. dispositifs dans lesquels le flux est produit par la chute de pression causée par la vitesse d'un autre fluide le fluide inducteur étant un fluide compressible déplaçant des fluides compressibles pour les évacuer du type multiétagé
• F04F 5/46 - Aménagements des tuyères
• F04F 5/54 - Installations caractérisées par l'utilisation de pompes à jet, p. ex. par des combinaisons de plusieurs pompes de différents types

Abrégé

So as to reduce its size, the invention provides a multistage ejector for generating a vacuum across a first, drive stage comprising a drive nozzle array for generating drive flow of air from a compressed air source, the drive nozzle array including two or more nozzles arranged to feed respective air jets together substantially directly into a common outlet of the drive stage so as to entrain air in a volume surrounding the air jets into the drive flow in order to generate a vacuum across the drive stage, the outlet of the drive stage being the inlet of a converging-diverging nozzle of a second stage, the converging-diverging nozzle being arranged to direct said air as a second stage air j et substantially directly into an outlet of the second stage so as to entrain air in a volume surrounding the second stage air jet into the flow in order to generate a vacuum across the second stage.

Classes IPC  ?

• F04F 5/20 - Pompes à jet, p. ex. dispositifs dans lesquels le flux est produit par la chute de pression causée par la vitesse d'un autre fluide le fluide inducteur étant un fluide compressible déplaçant des fluides compressibles pour les évacuer
• F04F 5/46 - Aménagements des tuyères
• F04F 5/22 - Pompes à jet, p. ex. dispositifs dans lesquels le flux est produit par la chute de pression causée par la vitesse d'un autre fluide le fluide inducteur étant un fluide compressible déplaçant des fluides compressibles pour les évacuer du type multiétagé

Abrégé

So as to offer greater design freedom for the upstream nozzles since the resistance upon exit of the jet flow into ambient pressure is encountered less abruptly, the invention provides al. multi-stage ejector for generating a vacuum from a source of compressed air by passing said compressed air through a series of nozzles, accelerating said compressed air, and entraining air so as to form a jet flow in two or more stages including at least a drive stage and a second stage and generating a vacuum across each stage before ejecting said jet flow through an outlet of the ejector, wherein said ejector outlet is formed as a nozzle extending to the outlet end of the ejector and arranged to receive the jet flow from the final stage of the ejector, and wherein said ejector outlet nozzle includes a diverging section extending at an angle of divergence to the direction of airflow, said diverging section terminating in a stepwise expansion in the cross-sectional flow area, as viewed in a direction perpendicular to the direction of airflow through the ejector outlet nozzle.

Classes IPC  ?

• F04F 5/22 - Pompes à jet, p. ex. dispositifs dans lesquels le flux est produit par la chute de pression causée par la vitesse d'un autre fluide le fluide inducteur étant un fluide compressible déplaçant des fluides compressibles pour les évacuer du type multiétagé
• F04F 5/54 - Installations caractérisées par l'utilisation de pompes à jet, p. ex. par des combinaisons de plusieurs pompes de différents types

Abrégé

So as to render the manufacturing of an at least equally efficient multi-stage ejector more cost-efficient, the invention provides a multi-stage ejector for generating a vacuum from a source of compressed air by passing said compressed air through a series of nozzles, accelerating said compressed air, and entraining air so as to form a jet flow in one or more stages and generate a vacuum across each stage, the multi-stage ejector comprising a drive stage; a second stage; and a converging-diverging nozzle provided in said series of nozzles between said drive stage and said second stage for receiving jet flow from said drive stage and accelerating said jet flow to form a second stage air jet and directing said second stage air jet into an inlet of an outlet nozzle of the second stage, wherein said converging- diverging nozzle is formed in a moulded nozzle piece mounted in said multi-stage ejector.

Classes IPC  ?

• F04F 5/22 - Pompes à jet, p. ex. dispositifs dans lesquels le flux est produit par la chute de pression causée par la vitesse d'un autre fluide le fluide inducteur étant un fluide compressible déplaçant des fluides compressibles pour les évacuer du type multiétagé
• F04F 5/54 - Installations caractérisées par l'utilisation de pompes à jet, p. ex. par des combinaisons de plusieurs pompes de différents types

Abrégé

A bellows insert (25) is shown, mountable inside a bellows for a vacuum powered tool and, in the mounted position, effective to locally limit the capacity of the bellows of compression in its longitudinal direction caused by a negative pressure introduced into the bellows. The bellows insert comprises an engagement part (26) that has a shape complementary to the inside of the bellows and that, in the mounted position of the bellows insert, fills up some or all of the pleats of the bellows within a limited area of the circumference of the bellows.

Classes IPC  ?

• B66C 1/02 - Éléments ou dispositifs de prise de la charge adjoints aux mécanismes de levage, de descente ou de halage, ou adaptés pour être utilisés avec ces mécanismes et transmettant les efforts à des articles ou à des groupes d'articles par succion
• B25J 15/06 - Têtes de préhension avec moyens de retenue magnétiques ou fonctionnant par succion
• B65G 47/91 - Dispositifs pour saisir et déposer les articles ou les matériaux comportant des pinces pneumatiques, p. ex. aspirantes
• B65B 35/18 - Alimentation en articles séparés, p. ex. transport de ces articles par griffes fonctionnant par succion

Abrégé

A regulator (1) is shown, which, in co-operation with a compressed-air-driven vacuum generator, is effective to maintain a negative pressure in a gripper activated by vacuum, and which regulator comprises a process-air duct (3) for the supply of compressed air to the vacuum generator and a flow-regulating slide (9) that is movably arranged in the process-air duct and biased to move toward a flow- reducing position, as well as a control means (17, 18, 25) actuating the slide and the force of which against the slide in the opposite direction of motion is determined by the pressure prevailing at each instant of time on the vacuum side of the vacuum generator, which via a control duct (21, 2 ') is led into the control means in the regulator, wherein the slide (9) is movably mounted in a lining (8) standing transverse to the process-air duct (3) and having mutually opposite openings ( 10, 11) in the wall of the lining for process-air flow through the lining and the slide.

Classes IPC  ?

• F04F 5/52 - Commande des pompes d'évacuation
• F04F 5/20 - Pompes à jet, p. ex. dispositifs dans lesquels le flux est produit par la chute de pression causée par la vitesse d'un autre fluide le fluide inducteur étant un fluide compressible déplaçant des fluides compressibles pour les évacuer

Abrégé

A suction cup for a tool driven by vacuum is presented, said suction cup in a first or upper end arranged to be brought into fluid flow communication with a vacuum source and in its opposite end arranged to be brought tightly into contact with the surface of an object to be handled. The suction cup is in its lower end arranged to be coupled to a sealing ring (2) having a sealing surface (5) arranged between an outer periphery (6) and a through- opening (8) defined by an inner periphery (7), and the sealing ring in the region of its inner periphery having a lip (10) arranged to engage with the suction cup, to which purpose the suction cup in its lower end has a circumferentially running groove (11) in which the peripheral region and the lip of the sealing ring is insertable under form fitting engagement and in a radially overlapping relation between the groove (11) and the lip (10) in the region (r) of engagement.

Classes IPC  ?

• B66C 1/02 - Éléments ou dispositifs de prise de la charge adjoints aux mécanismes de levage, de descente ou de halage, ou adaptés pour être utilisés avec ces mécanismes et transmettant les efforts à des articles ou à des groupes d'articles par succion
• B25J 15/06 - Têtes de préhension avec moyens de retenue magnétiques ou fonctionnant par succion
• B65G 47/91 - Dispositifs pour saisir et déposer les articles ou les matériaux comportant des pinces pneumatiques, p. ex. aspirantes

Abrégé

A vacuum generator driven by compressed air and arranged to supply vacuum to a vacuum gripper means, wherein a chamber (6) is associated with the vacuum generator and arranged to be brought in flow connection (9) with the vacuum gripper means via a valve (15) which is actuated by overpressure accumulated in the chamber to open said connection (9) to the vacuum gripper means in order to discharge the overpressure to the vacuum gripper means in result of interruption of the compressed air flow (P). The vacuum generator is characterized in that said chamber (6) in addition comprises a flow connection (11) with the ambient atmosphere, and in the additional flow connection (11) a one-way valve (10) which is arranged to open the connection (11) with the atmosphere in result of the air pressure in the chamber (6) falling below the atmospheric pressure.

Classes IPC  ?

• F04F 5/52 - Commande des pompes d'évacuation
• B65G 47/91 - Dispositifs pour saisir et déposer les articles ou les matériaux comportant des pinces pneumatiques, p. ex. aspirantes
• B66C 1/02 - Éléments ou dispositifs de prise de la charge adjoints aux mécanismes de levage, de descente ou de halage, ou adaptés pour être utilisés avec ces mécanismes et transmettant les efforts à des articles ou à des groupes d'articles par succion

Abrégé

The invention relates to an ejector device that is adapted to generate a negative pressure by means of compressed air, which via a compressed-air duct (2) is fed to an ejector (1) included in the device, comprising a valve member arranged in the compressed-air duct and controllable in order to, in the open position, allow flow of compressed air to the ejector, an air suction duct (3) arranged between the ejector and a gripping member driven by negative pressure, as well as a vent valve (7;70) that is arranged in flow communication with the air suction duct and that, in an open position, places the gripping member in communication with the atmosphere. The ejector device is characterized in that the valve member embraces: a primary valve (5;50) arranged in the direction of flow of the compressed air; a secondary valve (6;60) arranged in the direction of flow downstream of the primary valve; a flow section (2') of the compressed-air duct running between the primary valve and the secondary valve, through which flow section (2') compressed air flows in the open positions of the valves, the vent valve (7;70) being in flow communication with said flow section (2') in order to, in the open position of the primary valve, continuously being subjected to a closing air pressure, independently of the open or closed position of the secondary valve.

Classes IPC  ?

• B66C 1/02 - Éléments ou dispositifs de prise de la charge adjoints aux mécanismes de levage, de descente ou de halage, ou adaptés pour être utilisés avec ces mécanismes et transmettant les efforts à des articles ou à des groupes d'articles par succion
• F04F 5/52 - Commande des pompes d'évacuation

Abrégé

The invention relates to an ejector device that is effective to generate a negative pressure by means of compressed air that is fed to an ejector (1) included in the device via a compressed-air duct (2), furthermore comprising an air suction duct (3), a pressure sensor (18) arranged in the air suction duct as well as an electrically activatable valve member (5) arranged in the compressed-air duct and effective for the regulation of the flow of compressed air to the ejector, as well as electrically supplied control electronics (6) that at least is adapted to actuate the valve member in response to the pressure in the air suction duct detected by the sensor, furthermore comprising an energy- storing member in the form of an accumulator (7) by which the control electronics is supplied with electricity. The ejector device is characterized by a generator (8) that, via a charging air duct (9), is in flow communication with the compressed-air duct (2) and is driven by compressed air for the generation of electrical energy, which is brought into the accumulator (7) for charging the same.

Classes IPC  ?

• F04F 5/52 - Commande des pompes d'évacuation