Patents by Inventor Ralph Keitel
Ralph Keitel 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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Patent number: 9452557Abstract: A valve gated hot runner system that includes a single movable plate (or movable frame) that retains multiple valve pins. A linear actuator is coupled to rigid transmission elements that convey a linear motion from the actuator to several rotary components via a direct or indirect contact between at least a portion of the rigid transmission elements and the rotary components. The rigid transmission elements and the rotary components are connected to a common plate. The rotary components are further coupled to the movable plate (frame) and through their full rotation or turning lift or translate the movable plate (frame) with the valve pins to open and close the communication between hot runner nozzles and corresponding mold cavities. The actuator can be electrical, electro-magnetic, pneumatic or hydraulic.Type: GrantFiled: August 27, 2014Date of Patent: September 27, 2016Assignee: Otto Männer Innovation GmbHInventors: Ralph Keitel, Swen Spuller, Gheorghe George Olaru, Marco Herdel, Faimund Friderich
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Publication number: 20160059459Abstract: A valve gated hot runner system that includes a single movable plate (or movable frame) that retains multiple valve pins. A linear actuator is coupled to rigid transmission elements that convey a linear motion from the actuator to several rotary components via a direct or indirect contact between at least a portion of the rigid transmission elements and the rotary components. The rigid transmission elements and the rotary components are connected to a common plate. The rotary components are further coupled to the movable plate (frame) and through their full rotation or turning lift or translate the movable plate (frame) with the valve pins to open and close the communication between hot runner nozzles and corresponding mold cavities. The actuator can be electrical, electro-magnetic, pneumatic or hydraulic.Type: ApplicationFiled: August 27, 2014Publication date: March 3, 2016Inventors: Ralph Keitel, Swen Spuller, Gheorghe George Olaru, Marco Herdel, Faimund Friderich
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Publication number: 20150014887Abstract: A valve gated hot runner system that includes a single movable plate (or movable frame) that retains multiple valve pins. A linear actuator is coupled to rigid transmission elements that convey a linear motion from the actuator to several rotary components via a direct or indirect contact between at least a portion of the rigid transmission elements and the rotary components. The rigid transmission elements and the rotary components are connected to a common plate. The rotary components are further coupled to the movable plate (frame) and through their full rotation or turning lift or translate the movable plate (frame) with the valve pins to open and close the communication between hot runner nozzles and corresponding mold cavities. The actuator can be electrical, electro-magnetic, pneumatic or hydraulic.Type: ApplicationFiled: August 27, 2014Publication date: January 15, 2015Inventors: Ralph Keitel, Swen Spuller, Gheorghe George Olaru, Marco Herdel, Faimund Friderich
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Patent number: 7004746Abstract: The novel solution provides a closing part comprising an electromechanical drive for a CD injection molding machine having a working stroke and a servicing stroke. The entire mold closing unit is characterized by the combination of a short-stroke crank mechanism which is operated by an electric motor and which is provided for the working stroke and of a central electromotive column-type nut drive for the servicing stroke. According to the invention, synchronous motors or asynchronous motors are used with corresponding servo boosters to realize servo axles. The central column drive is used as a control element of the closing force control, together with a force sensor for detecting the closing force, as an actual value transmitter and as a control device.Type: GrantFiled: June 4, 2004Date of Patent: February 28, 2006Assignee: Netstal-Maschinen AGInventors: Robert Weinmann, Bruno Stillhard, Ralph Keitel
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Publication number: 20040219258Abstract: The novel solution provides a closing part comprising an electromechanical drive for a CD injection molding machine having a working stroke and a servicing stroke. The entire mold closing unit is characterized by the combination of a short-stroke crank mechanism which is operated by an electric motor and which is provided for the working stroke and of a central electromotive column-type nut drive for the servicing stroke. According to the invention, synchronous motors or asynchronous motors are used with corresponding servo boosters to realize servo axles. The central column drive is used as a control element of the closing force control, together with a force sensor for detecting the closing force, as an actual value transmitter and as a control device.Type: ApplicationFiled: June 4, 2004Publication date: November 4, 2004Applicant: Netstal-Machinen AGInventors: Robert Weinmann, Bruno Stillhard, Ralph Keitel
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Patent number: 6796783Abstract: The novel solution provides a closing part comprising an electromechanical drive for a CD injection molding machine having a working stroke and a servicing stroke. The entire mold closing unit is characterized by the combination of a short-stroke crank mechanism which is operated by an electric motor and which is provided for the working stroke and of a central electromotive column-type nut drive for the servicing stroke. According to the invention, synchronous motors or asynchronous motors are used with corresponding servo boosters to realize servo axles. The central column drive is used as a control element of the closing force control, together with a force sensor for detecting the closing force, as an actual value transmitter and as a control device.Type: GrantFiled: November 14, 2001Date of Patent: September 28, 2004Assignee: Netsal Maschinen AGInventors: Robert Weinmann, Bruno Stillhard, Ralph Keitel
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Patent number: 5348463Abstract: A device for generating nozzle contact pressure for the nozzle of a plasticizing and injection unit includes a spindle drive system and a measuring sensor to detect when an appropriate nozzle contact pressure has been achieved. The device generates nozzle contact pressure and also makes it possible to adjust and set the contact pressure of the nozzle.Type: GrantFiled: June 11, 1993Date of Patent: September 20, 1994Assignee: Klockner Ferromatik Desma GmbHInventors: Ralph Keitel, Bruno Stillhard