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).

  • Patent number: 9452557
    Abstract: 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: Grant
    Filed: August 27, 2014
    Date of Patent: September 27, 2016
    Assignee: Otto Männer Innovation GmbH
    Inventors: Ralph Keitel, Swen Spuller, Gheorghe George Olaru, Marco Herdel, Faimund Friderich
  • Publication number: 20160059459
    Abstract: 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: Application
    Filed: August 27, 2014
    Publication date: March 3, 2016
    Inventors: Ralph Keitel, Swen Spuller, Gheorghe George Olaru, Marco Herdel, Faimund Friderich
  • Publication number: 20150014887
    Abstract: 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: Application
    Filed: August 27, 2014
    Publication date: January 15, 2015
    Inventors: Ralph Keitel, Swen Spuller, Gheorghe George Olaru, Marco Herdel, Faimund Friderich
  • Patent number: 7004746
    Abstract: 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: Grant
    Filed: June 4, 2004
    Date of Patent: February 28, 2006
    Assignee: Netstal-Maschinen AG
    Inventors: Robert Weinmann, Bruno Stillhard, Ralph Keitel
  • Publication number: 20040219258
    Abstract: 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: Application
    Filed: June 4, 2004
    Publication date: November 4, 2004
    Applicant: Netstal-Machinen AG
    Inventors: Robert Weinmann, Bruno Stillhard, Ralph Keitel
  • Patent number: 6796783
    Abstract: 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: Grant
    Filed: November 14, 2001
    Date of Patent: September 28, 2004
    Assignee: Netsal Maschinen AG
    Inventors: Robert Weinmann, Bruno Stillhard, Ralph Keitel
  • Patent number: 5348463
    Abstract: 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: Grant
    Filed: June 11, 1993
    Date of Patent: September 20, 1994
    Assignee: Klockner Ferromatik Desma GmbH
    Inventors: Ralph Keitel, Bruno Stillhard