Patents by Inventor Wilhelm A. Keller
Wilhelm A. Keller has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20120199607Abstract: The invention relates to a discharge arrangement, comprising a two-component cartridge (2) and an accessory part, for example, a mixer (3). A connecting component (11, 12) of a connecting device is arranged on each of the two parts.Type: ApplicationFiled: June 29, 2010Publication date: August 9, 2012Applicant: MEDMIX SYSTEMS AGInventor: Wilhelm A. Keller
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Patent number: 8167835Abstract: A single chamber device for drawing in and dispensing components comprising a syringe housing, a piston that is actuatable by a plunger unit, and a mixing assembly whose rod is guided through the piston and operatively connected to the plunger unit. The plunger unit comprises a plunger rod that is articulated at the mixing rod and provided with means that are engageable with the mixing rod. In this manner, a mixture of different components, particularly also bone cement, can be both created and dispensed in a simple and inexpensive single chamber device.Type: GrantFiled: February 19, 2009Date of Patent: May 1, 2012Assignee: Medmix Systems AGInventor: Wilhelm A. Keller
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Patent number: 8132694Abstract: Disclosed is a dispensing device comprises a dispense mechanism and a multicomponent syringe. The fastening parts of the syringe are embodied such that the syringe can be inserted into a holder on the dispense mechanism on the plane of the reservoirs thereof and perpendicular to the plane formed by the handle and the triggering lever of the dispense mechanism. The fastening parts on the syringe and the insertion opening on the syringe holder of the dispense mechanism are provided with coding elements that ensure that the syringe is inserted in only one direction, thus preventing non-certified syringes from being dispensed by the dispense mechanism. In a preferred embodiment, ergonomically shaped syringe flanges can optionally be used for dispensing the syringe in an optimal manner by hand with the aid of a dispense mechanism.Type: GrantFiled: July 19, 2005Date of Patent: March 13, 2012Assignee: Sulzer Mixpac AGInventor: Wilhelm A. Keller
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Publication number: 20120026823Abstract: A discharge apparatus for discharging a fluid product comprises a housing (1) having an outlet (6) at a front housing end, a discharge member (3) which is mounted movably in the housing and the rear end of which protrudes from the rear housing end, and a mixing device (2) for mixing the fluid product inside the housing. The fluid product is provided in a housing volume (25) formed between the outlet and the discharge member. The fluid product is discharged through the outlet out of the housing by advancing the discharge member inside the housing from a rear position into a front position in the direction of the outlet. The mixing device comprises a mixing tube (11), which is mounted movably between the housing and the discharge member in the housing, and at least one mixing element (12), which is provided at the front end of the mixing tube and disposed inside the housing volume.Type: ApplicationFiled: April 8, 2010Publication date: February 2, 2012Applicant: MEDMIX SYSTEMS AGInventors: Andy Greter, Rochus Stockli, Samuel Kaufmann, Wilhelm A. Keller
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Patent number: 8100295Abstract: A dispensing assembly comprises a syringe and at least one accessory, such as a mixer or a closure cap. The syringe defines a first fastening area with a first pair of retaining elements, and the accessory defines a second fastening area with a second pair of retaining elements. The accessory has a housing with two mutually opposite, compressible housing portions. These housing portions are offset in relation to the second pair of retaining elements along the circumference of the housing. The fastening areas are configured such that the accessory is capable to be slipped-on the syringe and removable therefrom without a twisting motion, by applying pressure to the compressible housing portions.Type: GrantFiled: March 23, 2007Date of Patent: January 24, 2012Assignee: Medmix Systems AGInventor: Wilhelm A. Keller
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Patent number: 8096449Abstract: The dispensing appliance for a multiple cartridge or syringe comprising a housing configured to receive the cartridge that has an internal thread and a rotatable portion that has a complementary thread, the internal thread and the rotatable portion cooperating in such a manner that by mutual rotation thereof, the rotatable portion is continuously displaceable relative to the housing in the dispensing direction. The housing is configured to receive the cartridge that has two adjacent storage containers, and a thrust force of the rotatable portion is transmitted to a multiple ram without any pressure relief. This arrangement allows dispensing even highly viscous materials from cartridges with little manual force under high pressure and in a precisely metered manner.Type: GrantFiled: June 7, 2007Date of Patent: January 17, 2012Assignee: Medmix Systems AGInventor: Wilhelm A. Keller
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Patent number: 8074843Abstract: A two-part double syringe or double cartridge having associated, isolated containers with respective outlets which are connected to each other by a connecting element, the connecting element forming a unit that includes a holder with two container receptacles, a support wall, and a one-piece retaining flange, the support wall having recesses for receiving the container outlets and the container receptacles having respective guiding sleeves, and the outlet side being configured as a fastening area for the attachment of a mixer or accessory. Such a double syringe allows the containers to be filled separately, is very solid, and can be operated like a one-piece double syringe.Type: GrantFiled: February 27, 2007Date of Patent: December 13, 2011Assignee: Medmix Systems AGInventor: Wilhelm A. Keller
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Publication number: 20110273954Abstract: A mixing apparatus for mixing at least two components comprises a mixing chamber having a first component and at least one component chamber having a further component. The component chamber is connected to the mixing chamber by a feed line. A negative pressure device generates a negative pressure in the mixing chamber in the starting position. By activating the negative pressure device, the pressure is equalized, whereby the further component is transferred into the mixing chamber. A display apparatus is provided at the component chamber to display a pressure change in the component chamber. The display apparatus is preferably formed by elastic bellows provided at one end of the component chamber, which is disposed opposite of the end of the component chamber following the feed line.Type: ApplicationFiled: December 2, 2009Publication date: November 10, 2011Inventors: Andy Greter, Martin Veid, Rochus Stockli, Wilhelm A. Keller
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Patent number: 8038651Abstract: The suggested device comprises a dispensing piston that is actuatable by a pressure medium for dispensing a syringe and a guide portion within which the dispensing piston is displaceably supported. The device is designed for dispensing a double syringe and includes a handling portion for receiving the pressure medium, the dispensing piston, and the guide portion, as well as locking means that are releasable by applying manual pressure to the handling portion and are arranged on the handling portion and operatively connected to locking means provided on the dispensing piston. This allows a very simple repeated use of this arrangement for self-dispensing by patients, and remote wounds, e.g. an arm or foot wound, can also be treated by the patient independently.Type: GrantFiled: January 23, 2009Date of Patent: October 18, 2011Assignee: Medmix Systems AGInventor: Wilhelm A. Keller
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Patent number: 8033429Abstract: The dispensing device for single use includes a multicomponent cartridge with a closure and a mixer. The cartridge and the mixer form an interconnected unit and the closure, arranged between the outlets of the cartridge and the inlets of the mixer, is configured as a valve arrangement in order to establish a connection between the cartridge outlets and the mixing elements of the mixer after performing a relative movement between the mixer and the cartridge or syringe. In certain embodiments of the invention the connection is effected by rotation of the mixing unit relative to the cartridge, and in other embodiments of the invention by axial displacement of the mixing unit relative to the cartridge. This results in a disposable dispensing unit that can be economically produced and is particularly easy to use.Type: GrantFiled: July 7, 2005Date of Patent: October 11, 2011Assignee: Sulzer Mixpac AGInventor: Wilhelm A. Keller
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Publication number: 20110228631Abstract: The static mixer has a coupling section and a mixer housing in which mixer elements are arranged consecutively in the flow direction so as to be offset relative to one another by an angle, and are designed so as to apply an alternatingly directed rotation to the mixed material during the mixing operation. A mixer element has two transversal walls that are divided into sectors, the first transversal wall comprising sectors that are separated by an inflow separating wall directed to the inlet, and a separating wall directed to the outlet, the transitions between the sectors and the separating wall forming respective breakaway edges, the separating wall being arranged at an angle relative to the inflow separating wall, and the second transversal wall, which is divided into sectors, having an outflow separating wall directed to the outlet. Such a mixer allows a more efficient mixture particularly of very quickly reacting components and is also suitable for small dimensions as used in medicine.Type: ApplicationFiled: November 19, 2009Publication date: September 22, 2011Inventors: Rochus Stoeckli, Wilhelm A. Keller
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Patent number: 8016808Abstract: The device for piercing film bags includes a piercing spike and means for preventing unintentional piercing by the piercing spike, the means for preventing unintentional piercing comprising a bag support plate that is connected to a baseplate by collapsible or tearable spacers. The device is preferably designed as a unit and insertable into a container of a dispensing assembly. This device provides a high safety against unintentional piercing due to shocks and transport vibrations and is inexpensive to manufacture and multifunctional.Type: GrantFiled: February 13, 2007Date of Patent: September 13, 2011Assignee: Medmix Systems AGInventor: Wilhelm A. Keller
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Publication number: 20110139821Abstract: A discharge arrangement for discharging a mixture comprises a connector (6) having at least two inlet channels (7, 7?) ending a mixing channel (8). A static mixing element (10) is provided in the mixing channel. A distal end region of the mixing channel is surrounded by a cone region (13), the outer circumference of which continuously tapers in the direction of the outlet of the mixing channel and which serves as a fastening region for an accessory (23) of the discharge arrangement. The cone region is designed as a luer cone in order to ensure the easy connection of accessories. The mixing element extends into the fastening region in order to minimize the dead volume.Type: ApplicationFiled: September 18, 2009Publication date: June 16, 2011Applicant: MEDMIX SYSTEMS AGInventors: Andy Greter, Ralph Egon Kayser, Wilhelm A. Keller
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Patent number: 7954672Abstract: The dispensing appliance for a double syringe includes double plungers (4) connected by a thrust plate (5) and a flange holder (6) having a guiding slot (8) for receiving the retaining flange (9) of the double syringe (1) and at least one finger rest grip (7). Such a dispensing appliance allows an easier dispensing especially of smaller double syringes.Type: GrantFiled: February 13, 2007Date of Patent: June 7, 2011Assignee: Sulzer Mixpac AGInventor: Wilhelm A. Keller
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Publication number: 20110121035Abstract: The invention relates to a discharge device (1) comprising a tank housing (3) having at least one outlet (4) at one end and having a drive means at the opposite end. A connector (6) can be placed over the outlet (4) on the discharge device. The connector comprises a releasable mounting device that can be released by manual pressure on two opposite side surfaces of the connector. One guide surface (9) is provided on each of the two opposite side surfaces, each being oriented diagonally to the longitudinal axis (L) of the discharge device (1) and spaced in the direction of the discharge device. The connector is placed over the outlet on the discharge device in a mounting position. The guide surfaces (9) are moved radially toward each other in a released position by pressure (F) on the side surfaces.Type: ApplicationFiled: July 21, 2009Publication date: May 26, 2011Applicant: MEDMIX SYSTEMS AGInventors: Andy Greter, Ralph Egon Kayser, Wilhelm A. Keller
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Publication number: 20110118664Abstract: The dispensing assembly has a one-piece syringe holder in which two separate syringes are placed and which includes a thumb rest that acts upon the thrust plates of the syringes jointly. The integral design of the syringe holder and the thumb rest results in a synchronous dispensing of both syringes. Preferentially, the syringe holder comprises guiding and fastening means for the separate syringes.Type: ApplicationFiled: July 3, 2009Publication date: May 19, 2011Inventors: Andy Greter, Ralph Kayser, Wilhelm A. Keller
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Publication number: 20110114212Abstract: An opening device for opening a closed fluid container comprises a housing having a first chamber (1) for receiving the fluid container (3) and a second chamber (2) having an outlet (13). A part (6) of the fluid container that can be separated is arranged in the second chamber. A rotary drum (8) is rotatably supported in the second chamber. Said drum can be rotated from a starting position into a separating position in which it separates the separable container part from the fluid container. The rotational axis of the rotary drum is disposed at an angle to the connecting axis between the first and second chambers. A system for mixing at least two components uses such an opening device and a mixing container (18) having a connecting piece (19), to which the opening device is removably connected to establish a fluid connection.Type: ApplicationFiled: July 14, 2009Publication date: May 19, 2011Applicant: MEDMIX SYSTEMS AGInventors: Andy Greter, William Brem, Wilhelm A. Keller
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Publication number: 20110108573Abstract: The dispensing assembly comprises a double cartridge having two storage containers with bags placed therein, a mixer that is connectable to the cartridge, and an opening means acting upon the bag. The opening means is arranged on the mixer housing and rotatable with respect to the cartridge and has a cutting member comprising two knife-edges that acts essentially perpendicular to the longitudinal axis of the bags within the cartridge. Thanks to the knife-edges that are rotatable and arranged laterally with respect to the bags, such a cutting member allows a clean and predetermined opening of the bags and a dispensing operation with minimum pressure losses and lost volumes.Type: ApplicationFiled: July 3, 2009Publication date: May 12, 2011Inventors: Rochus Stoeckli, Andy Greter, Wilhelm A. Keller
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Patent number: 7938296Abstract: A two-component syringe is provided with a valve assembly having a common inlet/outlet, the valve assembly being designed to selectively close the containers of the syringe or allow a liquid from the outside to be aspirated into one of the containers via the common inlet/outlet or connect the two containers to each other or allow a mixture to be dispensed through the common inlet/outlet. This valve assembly is composed of a valve body provided with a sealing disk having channels that are arranged such that the connections are established or interrupted when the valve body is rotated. The design of such a valve assembly is simple and cost-efficient, and it allows aspirating liquids into a container and transferring them to another container that holds a powder as well as dispensing multicomponent liquids or pastes efficiently and with minimum pressure and volume losses.Type: GrantFiled: June 15, 2006Date of Patent: May 10, 2011Assignee: Medmix Systems AGInventor: Wilhelm A. Keller
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Patent number: 7882858Abstract: In a device for filling dispensing appliances having a pump unit with a metering cylinder and a storage container for each component, a respective coupling arrangement (5) is provided between each storage container (2, 3) and an associated coupling of a filling station. In a preferred embodiment, the appliance coupling part (28) is arranged in an inlet nozzle (17) of the dispensing appliance (1) and the station coupling part (29) in a guide (31) in the enclosure (33) of the filling station (30). This device allows a quick and simple filling of storage containers without contaminations and air entrapment.Type: GrantFiled: August 19, 2004Date of Patent: February 8, 2011Assignee: Sulzer Mixpac AGInventor: Wilhelm A. Keller