Patents by Inventor Friedhelm Pfitzer

Friedhelm Pfitzer 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: 10087930
    Abstract: A vane for a vane cell vacuum pump. The vane can be rotated about an axis of rotation by a rotor in a pump chamber and guided in the longitudinal direction in the rotor, with an upper side and a lower side to abut against the bottom and the ceiling of the pump chamber, with a rear side opposite a front side to limit the pressure chambers, with at least one face to slidably abut against an inside wall of the pump chamber on the casing side. The vane comprises a base body of a first plastic material and a vane end molded of a second plastic material to the base body forming the face. The base body comprises a mounting section around which the vane end is formed. The mounting section comprises at least one recess transverse to the front side and/or the rear side.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: October 2, 2018
    Assignee: Joma-Polytec GmbH
    Inventors: Hans-Peter Ott, Bernd Hess, Stefanie Wuhrer, Martin Thoma, Torsten Helle, Friedhelm Pfitzer
  • Publication number: 20170016443
    Abstract: A vane for a vane cell vacuum pump. The vane can be rotated about an axis of rotation by a rotor in a pump chamber and guided in the longitudinal direction in the rotor, with an upper side and a lower side to abut against the bottom and the ceiling of the pump chamber, with a rear side opposite a front side to limit the pressure chambers, with at least one face to slidably abut against an inside wall of the pump chamber on the casing side. The vane comprises a base body of a first plastic material and a vane end molded of a second plastic material to the base body forming the face. The base body comprises a mounting section around which the vane end is formed. The mounting section comprises at least one recess transverse to the front side and/or the rear side.
    Type: Application
    Filed: July 11, 2016
    Publication date: January 19, 2017
    Inventors: Hans-Peter Ott, Bernd Hess, Stefanie Wuhrer, Martin Thoma, Torsten Helle, Friedhelm Pfitzer
  • Publication number: 20170016445
    Abstract: A rotor for a vane cell pump—in particular, for a vacuum pump—with a base body that is made of plastic and can be driven by rotation, and that rotates about an axis of rotation during operation, wherein the base body comprises a guiding section for slidably receiving a pump vane and wherein the base body is flanked in the direction of the axis of rotation by a first bearing surface and a second bearing surface, wherein the second bearing surface comprises bearing sections that are at a distance from one another and that lie on a circular path that is arranged concentrically to the axis of rotation.
    Type: Application
    Filed: July 12, 2016
    Publication date: January 19, 2017
    Inventors: Hans-Peter Ott, Bernd Hess, Martin Thoma, Thomas Gulde, Torsten Helle, Friedhelm Pfitzer
  • Patent number: 8282821
    Abstract: An oil filter assembly (10) has a receiving chamber (18) that can be closed by a cover element (14) and a spring-loaded supporting tube (22) that is fixed in the receiving chamber and is designed to receive a filter element (20) that can be radially traversed by oil. The supporting tube (22) is axially displaceable between an operating position and a drain position in such a way that, in the operating position when the receiving chamber is closed by the cover element (14), the tube closes a drain opening (42). When the receiving chamber is open in the drain position, the tube releases the drain opening. The supporting tube is mounted to rotate through a rotational angle that is limited by two rotational stops (41, 43) in the housing and the cover element has follower sections (66, 68, 70) that co-operate with the supporting tube and/or filter element to rotate the supporting tube through the rotational angle when the cover element is screwed on and/or unscrewed.
    Type: Grant
    Filed: May 19, 2007
    Date of Patent: October 9, 2012
    Assignee: Joma-Polytec Kunststofftechnik GmbH
    Inventors: Jan Maier, Friedhelm Pfitzer, Alexander Maute, Stefan Heinz, Peter Jungmann, Matthias Knoell
  • Patent number: 8182681
    Abstract: An oil filter assembly (10) has a receiving chamber that can be closed by a cover element and a spring-loaded supporting tube (22) that is fixed in the receiving chamber (18) and is designed to receive a filter element (20) that can be radially traversed by oil, the supporting tube being axially displaceable between an operating position and a drain position in such a way that, in the operating position when the receiving chamber is closed by the cover element (14), the tube closes a drain opening (42) and when the receiving chamber is open in the drain position, the tube releases a drain opening (42). The cover element (14) has a supporting tube contact area (58) on the side facing the receiving chamber in such a way that during the closing of the receiving chamber (14) when the filter element is located on the supporting tube (22), pressure is exerted on the tube by the support tube contact area (58), thus displacing the tube into the operating position.
    Type: Grant
    Filed: May 19, 2007
    Date of Patent: May 22, 2012
    Assignee: Joma-Polytec Kunststofftechnik GmbH
    Inventors: Jan Maier, Matthias Knoell, Friedhelm Pfitzer
  • Patent number: 8128818
    Abstract: An oil filter arrangement, has a housing (12) with a receiving space (18) for a filter element (20) which can be inserted into the housing and through which oil can flow radially, with an oil inlet (34) and an oil outlet (32), and with a supporting tube (22) which is present in the receiving space and supports the filter element. The supporting tube is inserted into the receiving space and is fastened to the housing in such a manner that it remains in the housing when the filter element is exchanged.
    Type: Grant
    Filed: May 20, 2006
    Date of Patent: March 6, 2012
    Assignee: Joma-Polytec Kunststofftechnik GmbH
    Inventors: Peter Jungmann, Alexander Maute, Friedhelm Pfitzer, Jan Maier
  • Patent number: 7862717
    Abstract: An oil filter arrangement comprises a housing, which has a receiving chamber for a filter element which can be cross-flowed in a radial manner by oil and which can be inserted into the housing, a support tube which supports the filter element when it is inserted, a housing cover which closes the receiving chamber, and a drainage channel which is provided in the base area of the receiving chamber. The support tube is fixed to the housing and it remains therein when the filter element is replaced and that a drainage plate, which comprises closing means for closing the drainage channel and which is arranged in an axially displaceable manner, to a limited extent, on the support tube, is arranged in the base area of the receiving chamber.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: January 4, 2011
    Assignee: Joma-Polytec Kunststofftechnik GmbH
    Inventors: Friedhelm Pfitzer, Alexander Maute, Peter Jungmann
  • Patent number: 7842183
    Abstract: An oil filter assembly (10) comprises a housing (12) that has a holding space for a filter element (20), which can be placed inside the housing and through which oil can radially flow, an oil inlet, an oil outlet, and a supporting tube (22), which supports the filter element. A guide (62) for a compensating body of the outlet valve is provided on a part that is separate from the housing (12). The compensating body (58) serves to compensate for axial tolerances of the housing and/or of the filter element.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: November 30, 2010
    Assignee: Joma-Polytec Kunststofftechnik GmbH
    Inventors: Stefan Heinz, Friedhelm Pfitzer, Peter Jungmann, Alexander Maute
  • Publication number: 20100006493
    Abstract: An oil filter assembly (10) has a receiving chamber (18) that can be closed by a cover element (14) and a spring-loaded supporting tube (22) that is fixed in the receiving chamber and is designed to receive a filter element (20) that can be radially traversed by oil. The supporting tube (22) is axially displaceable between an operating position and a drain position in such a way that, in the operating position when the receiving chamber is closed by the cover element (14), the tube closes a drain opening (42). When the receiving chamber is open in the drain position, the tube releases the drain opening. The supporting tube is mounted to rotate through a rotational angle that is limited by two rotational stops (41, 43) in the housing and the cover element has follower sections (66, 68, 70) that co-operate with the supporting tube and/or filter element to rotate the supporting tube through the rotational angle when the cover element is screwed on and/or unscrewed.
    Type: Application
    Filed: May 19, 2007
    Publication date: January 14, 2010
    Inventors: Jan Maier, Friedhelm Pfitzer, Alexander Maute, Stefan Heinz, Peter Jungmann, Mathias Knoell
  • Publication number: 20090255866
    Abstract: An oil filter arrangement (10) comprises a housing, which has a receiving chamber (16) for a filter element (18) which can be cross-flowed in a radial manner by oil and which can be inserted into the housing, a support tube (42) which supports the filter element when it is inserted and a cover (14) which can be screwed to the housing (12) via a thread (15). The cover comprises engaging ribs (44) which are used to rotate the filter element (18) when screwing and/or unscrewing the cover (14) to the housing and/or from the housing.
    Type: Application
    Filed: May 16, 2006
    Publication date: October 15, 2009
    Inventors: Friedhelm Pfitzer, Alexander Maute, Peter Jungmann
  • Publication number: 20090223889
    Abstract: An oil filter assembly (10) comprises a housing (12) that has a holding space for a filter element (20), which can be placed inside the housing and through which oil can radially flow, an oil inlet, an oil outlet, and a supporting tube (22), which supports the filter element. A guide (62) for a compensating body of the outlet valve is provided on a part that is separate from the housing (12). The compensating body (58) serves to compensate for axial tolerances of the housing and/or of the filter element.
    Type: Application
    Filed: May 10, 2006
    Publication date: September 10, 2009
    Inventors: Stefan Heinz, Friedhelm Pfitzer, Peter Jungmann, Alexander Maute
  • Publication number: 20090218269
    Abstract: An oil filter arrangement, has a housing (12) with a receiving space (18) for a filter element (20) which can be inserted into the housing and through which oil can flow radially, with an oil inlet (34) and an oil outlet (32), and with a supporting tube (22) which is present in the receiving space and supports the filter element. The supporting tube is inserted into the receiving space and is fastened to the housing in such a manner that it remains in the housing when the filter element is exchanged.
    Type: Application
    Filed: May 20, 2006
    Publication date: September 3, 2009
    Inventors: Peter Jungmann, Alexander Maute, Friedhelm Pfitzer, Jan Maier
  • Publication number: 20090139923
    Abstract: An oil filter arrangement comprises a housing, which has a receiving chamber for a filter element which can be cross-flowed in a radial manner by oil and which can be inserted into the housing, a support tube which supports the filter element when it is inserted, a housing cover which closes the receiving chamber, and a drainage channel which is provided in the base area of the receiving chamber. The support tube is fixed to the housing and it remains therein when the filter element is replaced and that a drainage plate, which comprises closing means for closing the drainage channel and which is arranged in an axially displaceable manner, to a limited extent, on the support tube, is arranged in the base area of the receiving chamber.
    Type: Application
    Filed: May 18, 2006
    Publication date: June 4, 2009
    Applicant: JOMA-POLYTEC KUNSTSTOFFTECHNIK GMBH
    Inventors: Friedhelm Pfitzer, Alexander Maute, Peter Jungmann
  • Publication number: 20090134078
    Abstract: An oil filter arrangement (10) comprises a housing (12) provided with a reception compartment for receiving a filter element (20), which is insertable in the housing and which the oil radially passes through, an oil output and a support tube (22) which is arranged in the reception compartment and supports the filter element (20), wherein a bypass valve (24) which is arranged in the support tube (22) opens when a limiting pressure is exceeded and which the oil flowing from the oil input to the oil output passes through by passing the filter element, said bypass valve comprising a valve seat (36), a valve body (38) interacting therewith and a cage-like lid part (49). The support tube (22) and the lid part (40) are embodied in a single piece form of a plastic material.
    Type: Application
    Filed: August 18, 2006
    Publication date: May 28, 2009
    Inventors: Friedhelm Pfitzer, Peter Jungmann, Alexander Maute
  • Publication number: 20080169233
    Abstract: An oil filter assembly with a housing which comprises a receiving chamber for a filter element can be inserted into the housing and through which oil can flow in a radial direction, and with a housing lid that closes the receiving chamber, wherein a pure oil or unfiltered oil opening that is surrounded by a pipe socket, and a channel chamber extending in the longitudinal direction of the receiving chamber are provided at the bottom of the receiving chamber. A drainage plate is provided in the bottom area of the receiving chamber, which is disposed on the pipe socket such that it can be axially displaced to at least a certain degree and has a closing means, wherein at least one pressure spring is disposed between the drainage plate and the bottom such that in the operating position when the housing is closed and the filter element is inserted, the drainage plate is loaded by the filter element against the spring force and the closing means closes a drainage opening of the channel chamber.
    Type: Application
    Filed: January 11, 2007
    Publication date: July 17, 2008
    Applicant: Joma-Polytec Kunststofftechnik GmbH
    Inventors: Friedhelm Pfitzer, Peter Jungmann, Stefan Heinz, Alexander Maute
  • Patent number: 7198061
    Abstract: Hydraulically or pneumatically controlled seat valve (2), in particular a pressure control valve, having a valve seat (10) formed in a base part (4) which cooperates with the sealing surface of a valve body (8) displaceably disposed in a cover part (6), wherein the base part (4) and the cover part (6) are connected to each other, the base part (4) having an at least sectionally circumferential collar (18) which faces radially outwardly for mounting the seat valve (2) to a further component (60), in particular to a housing, using a welded joint.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: April 3, 2007
    Assignee: Joma-Polytec Kunststofftechnik GmbH
    Inventors: Peter Jungmann, Matthias Knoell, Friedhelm Pfitzer
  • Publication number: 20040118458
    Abstract: Hydraulically or pneumatically controlled seat valve (2), in particular a pressure control valve, having a valve seat (10) formed in a base part (4) which cooperates with the sealing surface of a valve body (8) displaceably disposed in a cover part (6), wherein the base part (4) and the cover part (6) are connected to each other, the base part (4) having an at least sectionally circumferential collar (18) which faces radially outwardly for mounting the seat valve (2) to a further component (60), in particular to a housing, using a welded joint.
    Type: Application
    Filed: December 18, 2003
    Publication date: June 24, 2004
    Applicant: Joma-Polytec Kunststofftechnik GmbH
    Inventors: Peter Jungmann, Matthias Knoell, Friedhelm Pfitzer