Patents by Inventor Dieter Schmidt

Dieter Schmidt 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).

  • Switchable support element
    Publication number: 20020038636
    Abstract: The invention proposes a switchable support element (1) requiring only a small design space. For this purpose, a slide (12) that serves to couple an inner element (6) to an outer housing (3) in the support element (1) is positioned laterally in a housing (2) arranged in the cylinder head (5). At the same time, a bore (8) in the inner element (6) for the slide (12) is made as a pocket bore, the housing (2) being seated through an annular extension (11) directly in a bore (9) of the outer housing (3). The slide (12) can be displaced electromagnetically or hydraulically in at least one direction.
    Type: Application
    Filed: September 5, 2001
    Publication date: April 4, 2002
    Inventors: Michael Haas, Bodo Rorig, Dieter Schmidt, Joachim Seitz
  • Switchable support element
    Publication number: 20020038642
    Abstract: A switchable, hydraulic support element (1) requiring only a small design space is proposed. For achieving this, a bore (16) for a slide (23) is arranged laterally of a pressure piston (10) of a hydraulic clearance compensation element (11) in the inner element (7) and is configured as a pocket bore. This dispenses with the stacked arrangement of the bore in the inner element and the clearance compensation element on top of each other as seen in prior art. At the same time, the slide (23) is installed in a housing (19) that extends in the cylinder head (5).
    Type: Application
    Filed: September 5, 2001
    Publication date: April 4, 2002
    Inventors: Michael Haas, Bodo Rorig, Dieter Schmidt, Joachim Seitz
  • Twist drill having a sintered cemented carbide body, and like tools, and use thereof
    Publication number: 20020029910
    Abstract: There is now provided a twist drill having an elongate body at a first end, a shank at a second and opposite end, the elongate body and the shank sharing a common axis, at least one face on the elongate body at an end opposite the shank, wherein the at least one face defines a corresponding flute extending along the elongate body toward the shank, at least one flank on an end of the elongate body at an end opposite the shank, and a cutting edge at a juncture of the at least one face and the at least one flank, and the like tools, having a sintered cemented carbide body, and the use thereof in material removing and dislodging tools.
    Type: Application
    Filed: August 22, 2001
    Publication date: March 14, 2002
    Inventors: Hans-Wilm Heinrich, Manfred Wolf, Dieter Schmidt
  • Tensioner
    Publication number: 20010016530
    Abstract: A tensioner, includes a hollow plunger guided in a cylinder for displacement in an axial direction and spring-loaded in a direction of a power transmitting element. A pressure chamber for receiving hydraulic fluid is defined by the cylinder and the plunger. Fitted interiorly of and being immobile with respect to the plunger is a control member which has a closed outer circumference, with a ring-shaped leakage gap formed by the plunger and the control member for passage of hydraulic fluid from the pressure chamber. The control member and the plunger have different coefficient of thermal expansion so that the leakage gap has dimensions which decrease as a temperature of the hydraulic fluid increases.
    Type: Application
    Filed: February 5, 2001
    Publication date: August 23, 2001
    Inventors: Rene Grunke, Dieter Schmidt, Bolko Schuseil
  • Finger lever shaped without cutting
    Patent number: 6253636
    Abstract: A finger lever that is shaped without cutting having two side walls (5, 6), which are connected in a first end area (1) by a lower wall (4) in a U-shape which opens upwardly, is provided with a bearing surface for a gas exchange valve (11) that is formed by the side walls (5, 6) being adjacent to each other axially in the second end area (2) so that a separation plane (13) is formed in a longitudinal center plane (12) of the finger lever.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: July 3, 2001
    Assignee: INA Walzlager Schaeffler oHG
    Inventor: Dieter Schmidt
  • Rocker arm installed in a cylinder head of a valve train of an internal combustion engine
    Patent number: 6220213
    Abstract: A rocker arm (6) that can be uncoupled from the cam lift, the axle (11) of this rocker arm (6) is guided for longitudinal movement in a slot (12) of a pedestal (13), and the rocker arm (6) can be coupled to the pedestal (13) by locking elements (20, 21, 22) or it can be uncoupled from the pedestal (13) by these locking elements (20, 21, 22) for achieving a zero lift of an associated gas exchange valve (9).
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: April 24, 2001
    Assignee: INA Walzlager Schaeffler oHG
    Inventors: Michael Haas, Dieter Schmidt, Walter Speil
  • Pick-style tool with a cermet insert having a Co-Ni-Fe-binder
    Patent number: 6170917
    Abstract: A pick-style tool that includes an elongate tool body with an axially forward end and an axially rearward end, and a hard insert affixed to the tool body at the axially forward end is disclosed. The hard insert comprises a WC-cermet comprising tungsten carbide and about 5 wt. % to 27 wt. % Co—Ni—Fe-binder. The Co—Ni—Fe-binder is unique in that even when subjected to plastic deformation, the binder substantially maintains its face centered cubic (fcc) crystal structure and avoids stress and/or strain induced transformations.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: January 9, 2001
    Assignee: Kennametal Inc.
    Inventors: Hans-Wilm Heinrich, Manfred Wolf, Dieter Schmidt, Uwe Schleinkofer
  • Valve tappet actuated by a CAM of an internal combustion engine
    Patent number: 6089200
    Abstract: A valve tappet actuated by a cam of an internal combustion engine comprises a cup (1) having a hollow cylindrical skirt (2) and a cup bottom (3) which closes the skirt (2) at one end. On an outer surface, the skirt (2) comprises a peripheral groove (4), and on an inner surface, at least one bead (5). Concentrically arranged within the cup (1) is an inner element (6) whose casing (9) bears against the bead (5, 21). A hydraulic valve clearance compensation element (10) is guided for axial displacement in the inner element (6). To simplify the manufacturing of this valve tappet, it is proposed that the cup (1) is hardened in a heat treatment process, and the inner element (5) is unhardened.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: July 18, 2000
    Assignee: Ina Walzlager Schaeffler oHG
    Inventors: Walter Speil, Dieter Schmidt
  • Valve tappet actuated by a cam of an internal combustion engine
    Patent number: 6065435
    Abstract: A valve tappet actuated by a cam of an internal combustion engine comprises a cup (1) having a hollow cylindrical skirt (2) and a cup bottom (3) which closes the skirt (2) at one end. On an outer surface, the skirt (2) comprises a peripheral groove (4), and on an inner surface, at least one bead (5). Concentrically arranged within the cup (1) is an inner element (6) whose casing (9) bears against the bead (5, 21). A hydraulic valve clearance compensation element (10) is guided for axial displacement in the inner element (6). To simplify the manufacturing of this valve tappet, it is proposed that the cup (1) is hardened in a heat treatment process, and the inner element (5) is unhardened.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: May 23, 2000
    Assignee: INA Walzlager Schaeffler oHG
    Inventors: Walter Speil, Dieter Schmidt
  • Tilting or drag lever with a valve clearance equalizing element
    Patent number: 6065434
    Abstract: A rocker arm or a finger lever (1) receives a valve clearance compensation element (4) in a reception bore (3). A cap (15) inserted into this reception bore (3) supports one end of an inner piston (7) of the valve clearance compensation element (4). This cap, through which on the one hand, the pressure medium is fed into an oil reservoir (8) and which, on the other hand, vents this oil reservoir (8) is fixed by an extension (17) in a complementary opening (18) of the rocker arm or the finger lever.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: May 23, 2000
    Assignee: Ina Walzlager Schaeffler oHG
    Inventor: Dieter Schmidt
  • Cam follower of a valve train of an internal combustion engine in the form of a finger lever or a rocker arm
    Patent number: 6055951
    Abstract: A finger lever (1) is configured for the simultaneous loading of three identically operating gas exchange valves. To simplify the manufacture of a hydraulic medium supply of its hydraulic clearance compensation elements (4) resting on valve stem ends and to prevent unnecessary losses of hydraulic medium, the invention proposes the arrangement of only one central passage (12) in the finger lever (1) for supplying all the clearance compensation elements (4). This passage (12) extends near a central transverse plane of the finger lever (1) and opens into a cross-passage (10) in the form of a through-bore to the individual clearance compensation elements (4).
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: May 2, 2000
    Assignee: Ina Walzlager Schaeffler oHG
    Inventors: Thomas Rommer, Dieter Schmidt
  • High pressure sodium lamp of low power
    Patent number: 6051927
    Abstract: The high-pressure sodium discharge lamp of low power described here is chcterized by a very high xenon cold filling pressure of at least 1 bar. The pressure ratio to the sodium operating pressures lies between 10 and 30. Luminous efficacies of approximately 100 lm/W and more can be obtained with a lamp power of 50 to 100 W.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: April 18, 2000
    Assignee: Patent-Truehand-Gesellschaft fuer elektrische Gluelampen mbH
    Inventors: Wolfram Graser, Dieter Schmidt
  • Barium magnesium aluminate phosphor
    Patent number: 6045721
    Abstract: A barium magnesium aluminate phosphor having improved maintenance and efficiency is provided. The novel phosphor is suitable for use in conventional fluorescent lamp applications and applications utilizing VUV excitation, including Xe excimer lamps and plasma display panels.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: April 4, 2000
    Assignee: Patent-Treuhand-Gesellschaft fur Elekrische Gluhlampen mbH
    Inventors: Martin Zachau, Dieter Schmidt, Ulrich Mueller, Charles F. Chenot
  • Cermet having a binder with improved plasticity
    Patent number: 6024776
    Abstract: Cermets having a Co--Ni--Fe-binder are described. The Co--Ni--Fe-binder is unique in that even when subjected to plastic deformation, the binder substantially maintains its face centered cubic crystal structure and avoids stress and/or strain induced phase transformations. Stated differently, the Co--Ni--Fe-binder exhibits reduced work hardening.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: February 15, 2000
    Assignee: Kennametal Inc.
    Inventors: Hans-Wilm Heinrich, Manfred Wolf, Dieter Schmidt, Uwe Schleinkofer
  • Elongate rotary tool comprising a cermet having a Co-Ni-Fe binder
    Patent number: 6022175
    Abstract: An elongate rotary tool including at least one cutting edge that is useful in the machining of workpiece materials is disclosed. The elongate rotary tool comprises a cermet comprising at least one hard component and about 0.2 wt. % to 19 wt. % Co--Ni--Fe-binder. The Co--Ni--Fe-binder is unique in that even when subjected to plastic deformation, the binder substantially maintains its face centered cubic (fcc) crystal structure and avoids stress and/or strain induced transformations.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: February 8, 2000
    Assignee: Kennametal Inc.
    Inventors: Hans-Wilm Heinrich, Manfred Wolf, Dieter Schmidt, Uwe Schleinkofer
  • Cutting insert of a cermet having a Co-Ni-Fe-binder
    Patent number: 6010283
    Abstract: A cutting insert including a flank face, a rake face, and a cutting edge at the intersection of the flank and rake faces that is useful in the chip forming machining of workpiece materials is disclosed. The cutting insert comprises a cermet comprising at least one hard component and about 2 wt % to 19 wt % Co--Ni--FE-binder. The Co--Ni--FE-binder is unique in that even when subjected to plastic deformation, the binder substantially maintains its face centered cubic (fcc) crystal structure and avoids stress and/or strain induced transformations.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: January 4, 2000
    Assignee: Kennametal Inc.
    Inventors: Hans-Wilm Henrich, Manfred Wolf, Dieter Schmidt, Uwe Schleinkofer
  • Rotary earth strata penetrating tool with a cermet insert having a co-ni-fe-binder
    Patent number: 5992546
    Abstract: A rotary tool that includes an elongate tool body and a hard insert affixed to the tool body is disclosed. The hard insert includes a WC-cermet including tungsten carbide and about 5 wt. % to 19 wt. % Co--Ni--Fe-binder. The Co--Ni--Fe-binder is unique in that even when subjected to plastic deformation, the binder substantially maintains its face centered cubic (fcc) crystal structure and avoids stress and/or strain induced transformations.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: November 30, 1999
    Assignee: Kennametal Inc.
    Inventors: Hans-Wilm Heinrich, Manfred Wolf, Dieter Schmidt, Uwe Schleinkofer
  • Hydraulic support element for a valve gear mechanism of an internal combustion engine
    Patent number: 5979377
    Abstract: A sleeve-like element (14) is arranged inside a hydraulic support element to secure against drainage. In axial direction, the sleeve-like inner element (14) bears a shoulder (13) of a piston (4), formed by a rolled-in step (12). In this manner, the inner element (14) can be secured while the piston (4) maintains a uniform wall thickness.
    Type: Grant
    Filed: May 28, 1998
    Date of Patent: November 9, 1999
    Assignee: INA Walzlager Schaffler oHG
    Inventors: Werner Barth, Arndt Ihlemann, Dieter Schmidt
  • Valve tappet actuated by the cam of an internal combustion engine
    Patent number: 5979385
    Abstract: A valve tappet actuated by a cam of an internal combustion engine comprises a cup (1) having a hollow cylindrical skirt (2) and a cup bottom (3) which closes the skirt (2) at one end. On an outer surface, the skirt (2) comprises a peripheral groove (4), and on an inner surface, at least one bead (5). Concentrically arranged within the cup (1) is an inner element (6) whose casing (9) bears against the bead (5, 21). A hydraulic valve clearance compensation element (10) is guided for axial displacement in the inner element (6). To simplify the manufacturing of this valve tappet, it is proposed that the cup (1) is hardened in a heat treatment process, and the inner element (5) is unhardened.
    Type: Grant
    Filed: July 7, 1998
    Date of Patent: November 9, 1999
    Assignee: Ina Walzlager Schaeffler oHG
    Inventors: Walter Speil, Dieter Schmidt
  • Cup-shaped tappet
    Patent number: 5954020
    Abstract: A cup-shaped tappet (1) for actuating a gas exchange valve (17) of an internal combustion engine, comprising a cylindrical jacket (6) closed at one end by a bottom (7) and guided in a bore (2) of a cylinder head (3), the valve tappet (1) being actuated by a cam (4) of a camshaft (5) acting on the bottom (7) of the tappet (1) characterized in that the bottom (7) and the jacket (6) are steel components having respective wall thicknesses (A),(B) dimensioned so that a product (P.sub.1) of the wall thicknesses, (A).times.(B) expressed in millimeters is <2.3, the wall thickness (A) of the bottom (7) being 1.7 to 2.4 mm and the wall thickness (B) of the jacket (6) being 0.7 to 1.0 mm.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: September 21, 1999
    Assignee: INA Walzlager Schaeffler KG
    Inventors: Dieter Schmidt, Walter Speil, Wolfgang Miereisz, Karl Ludwig Grell, Reinhard Ammon