Patents by Inventor Richard A. Eppler
Richard A. Eppler 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: 8077417Abstract: A method for synchronizing writing to a bit patterned media includes: reading bits from skipped blocks on the bit patterned media, using timing of bits read from the skipped blocks to update a write clock, and writing request data to physical blocks on the bit patterned media, interleaved with the skipped blocks. An apparatus that operates in accordance with the method is also provided.Type: GrantFiled: December 11, 2008Date of Patent: December 13, 2011Assignee: Seagate Technology LLCInventors: Michael Leigh Mallary, Walter Richard Eppler, Werner Scholz
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Patent number: 7982994Abstract: A data storage system includes recording media with a shingled track pattern of multiple data tracks in which mapped data bits are recorded. The mapped data are coherently aligned with one another across the multiple data tracks. A read head has an effective read head width that extends across the multiple data tracks and that is aligned to coherently read the mapped data bits. A read head output includes a non-binary multi-level amplitude summation of the mapped data bits.Type: GrantFiled: May 12, 2010Date of Patent: July 19, 2011Assignee: Seagate Technology, LLCInventors: Mehmet Fatih Erden, Mourad Benakli, Walter Richard Eppler
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Patent number: 7885025Abstract: A data storage system includes a storage medium having a plurality of data sectors and a head that communicates with the data storage medium. The head produces a readback signal when reading information from the data storage medium. A computation unit extracts a distortion component of the readback signal and generates a position error signal from the distortion component.Type: GrantFiled: October 22, 2008Date of Patent: February 8, 2011Assignee: Seagate Technology LLCInventors: Walter Richard Eppler, Inci Ozgunes, Xiangjun Feng, Kevin Arthur Gomez, Mark David Bedillion, Stephen John Wrazien
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Publication number: 20100149675Abstract: A method for synchronizing writing to a bit patterned media includes: reading bits from skipped blocks on the bit patterned media, using timing of bits read from the skipped blocks to update a write clock, and writing request data to physical blocks on the bit patterned media, interleaved with the skipped blocks. An apparatus that operates in accordance with the method is also provided.Type: ApplicationFiled: December 11, 2008Publication date: June 17, 2010Applicant: Seagate Technology LLCInventors: Michael Leigh Mallary, Walter Richard Eppler, Werner Scholz
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Publication number: 20100097714Abstract: A data storage system includes a storage medium having a plurality of data sectors and a head that communicates with the data storage medium. The head produces a readback signal when reading information from the data storage medium. A computation unit extracts a distortion component of the readback signal and generates a position error signal from the distortion component.Type: ApplicationFiled: October 22, 2008Publication date: April 22, 2010Applicant: Seagate Technology LLCInventors: Walter Richard Eppler, Inci Ozgunes, Xiangjun Feng, Kevin Arthur Gomez, Mark David Bedillion, Stephen John Wrazien
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Publication number: 20100073808Abstract: In a particular embodiment, a storage system is disclosed that includes a discrete track media having a plurality of concentric data tracks to store data and including a respective plurality of non-magnetic regions to separate adjacent data tracks. The non-magnetic regions include encoded position information. The storage system further includes a controller adapted to adjust a position of a read/write head relative to a center of a particular track based on the encoded position information.Type: ApplicationFiled: September 23, 2008Publication date: March 25, 2010Applicant: Seagate Technology LLCInventors: Walter Richard Eppler, Mark David Bedillion, Darren William Karns
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Patent number: 7440384Abstract: A magnetic recording device is provided according to the present invention for magnetic recording on a recording medium. The magnetic recording device includes a planar waveguide having a propagation axis. The planar waveguide allows light received thereby to propagate along the propagation axis. The magnetic recording device further includes a magnetic pole having a yoke disposed adjacent the planar waveguide and a pole tip extending into the planar waveguide along the propagation axis. By extending the pole tip into, and incorporating it with, the planar waveguide, the light propagating through the planar waveguide and a magnetic flux flowing through the magnetic pole are co-locatable on a recording medium disposed adjacent the magnetic recording device.Type: GrantFiled: February 21, 2007Date of Patent: October 21, 2008Assignee: Seagate Technology LLCInventor: Walter Richard Eppler
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Patent number: 7215629Abstract: A magnetic recording device is provided according to the present invention for magnetic recording on a recording medium. The magnetic recording device includes a planar waveguide having a propagation axis. The planar waveguide allows light received thereby to propagate along the propagation axis. The magnetic recording device further includes a magnetic pole having a yoke disposed adjacent the planar waveguide and a pole tip extending into the planar waveguide along the propagation axis. By extending the pole tip into, and incorporating it with, the planar waveguide, the light propagating through the planar waveguide and a magnetic flux flowing through the magnetic pole are co-locatable on a recording medium disposed adjacent the magnetic recording device.Type: GrantFiled: February 26, 2003Date of Patent: May 8, 2007Assignee: Seagate Technology LLCInventor: Walter Richard Eppler
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Publication number: 20030235121Abstract: A magnetic recording device is provided according to the present invention for magnetic recording on a recording medium. The magnetic recording device includes a planar waveguide having a propagation axis. The planar waveguide allows light received thereby to propagate along the propagation axis. The magnetic recording device further includes a magnetic pole having a yoke disposed adjacent the planar waveguide and a pole tip extending into the planar waveguide along the propagation axis. By extending the pole tip into, and incorporating it with, the planar waveguide, the light propagating through the planar waveguide and a magnetic flux flowing through the magnetic pole are co-locatable on a recording medium disposed adjacent the magnetic recording device.Type: ApplicationFiled: February 26, 2003Publication date: December 25, 2003Applicant: Seagate Technology LLCInventor: Walter Richard Eppler
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Patent number: 5783506Abstract: The present invention relates to a ceramic coating composition contains frit, suspending agent, binder, mica and pearlescent pigment and has a viscosity of about 10 to 50 second as measured by a Zahn cup with orifice diameter of 0.108 inch.Type: GrantFiled: January 31, 1997Date of Patent: July 21, 1998Assignee: Engelhard CorporationInventors: Richard A. Eppler, Jack S. Polonka
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Patent number: 5121968Abstract: A chair, particularly an office chair, comprises a chair column, a seat lower frame supported on the chair colunm in a height-adjustable manner and rotatable relative to a vertical axis, a seat support supported on the seat lower frame turnably about a horizontal axis, a backrest support supported on the seat lower frame turnably about a horizontal axis, at least one spring with adjustable tensioning and supported on the seat lower frame and the backrest support, an adjustable abutment provided for the pressure spring, a control curve against which the adjustable abutment abuts, and an adjusting element arranged to displace the control curve.Type: GrantFiled: March 22, 1990Date of Patent: June 16, 1992Assignee: Wilhelm Link GmbH & Co. KGInventor: Richard Eppler
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Patent number: 4805009Abstract: The present invention is directed to several embodiments of a hermetically sealed semiconductor package. One embodiment is constructed from a substrate of a first copper alloy, a cover member of a second copper alloy and a lead frame of a third copper alloy. A low melting point sealing glass composite is disposed between the cover member and the substrate for sealing the lead frame therebetween. The third copper alloy is precipitation hardenable and has excellent softening resistance at glass sealing temperatures as compared with other conventionally used alloys. In another embodiment, a clad composite having a core of the third copper alloy and cladding layer of a copper alloy having a low oxidation rate may be advantageously used for the lead frame.Type: GrantFiled: March 11, 1985Date of Patent: February 14, 1989Assignee: Olin CorporationInventors: Michael J. Pryor, Richard A. Eppler, Edward F. Smith, III, Sheldon H. Butt
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Patent number: 4388118Abstract: An inorganic black pigment is made by calcining raw materials such as manganese dioxide, manganese carbonate, strontium carbonate or calcium carbonate. The product is a perovskite structure made up of (a) 25-84 mol % of a manganese oxide and (b) 75-16 mol % SrO and/or CaO plus residual carbonates and mineralizers. The thus-produced black pigment is particularly advantageous in that it contains no heavy metals or highly toxic material and that it has very low oil absorption and high tinting strength.Type: GrantFiled: March 15, 1982Date of Patent: June 14, 1983Assignee: Mobay Chemical CorporationInventor: Richard A. Eppler
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Patent number: 4376169Abstract: A lead-free low-melting frit is made by combining raw materials in amounts such that the product will have a specific oxide analysis, melting the raw materials at a temperature greater than 1000.degree. C. and cooling the thus-formed fused glass in a manner such that a frit is formed. The low-melting frit has the following oxide analysis:7-12.5 parts by weight alkali oxide selected from2-9 parts by weight Na.sub.2 O and 2-7 parts by weight Li.sub.2 O;23-34 parts by weight B.sub.2 O.sub.3 ;2-4 parts by weight Al.sub.2 O.sub.3 ;30-45 parts by weight SiO.sub.2 ;0.75-4 parts by weight F;2-4 parts by weight P.sub.2 O.sub.5 ;4-8 parts by weight ZnO; and2-5 parts by weight TiO.sub.2.These frits are durable, have an incipient fusion point less than about 450.degree. C. and a coefficient of thermal expansion less than 10.times.10.sup.-6 cm/cm/.degree.C. The frits of the present invention are particularly useful as components in vitrifiable glass decorating colors.Type: GrantFiled: April 28, 1982Date of Patent: March 8, 1983Assignee: Mobay Chemical CorporationInventor: Richard A. Eppler
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Patent number: 4317683Abstract: The present invention is directed to orange inorganic pigment materials which are characterized by high tinctorial strengths, excellent color and thermal stability and relatively high opacity. These pigments are of inverse spinel structure and are produced by cocalcining compounds of iron and zinc with compounds of titanium, tin and/or silicon.Type: GrantFiled: March 2, 1981Date of Patent: March 2, 1982Assignee: Mobay Chemical CorporationInventor: Richard A. Eppler
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Patent number: 4312951Abstract: Disclosed are various ceramic frits which have a unique combination of low solubility, low-melting temperature, and freedom from lead oxide. They are formed from selected compositions in the alkali--ZnO--Al.sub.2 O.sub.3 --B.sub.2 O.sub.3 --P.sub.2 O.sub.5 --SiO.sub.2 --TiO.sub.2 --F system.Type: GrantFiled: September 7, 1979Date of Patent: January 26, 1982Assignee: Mobay Chemical CorporationInventor: Richard A. Eppler
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Patent number: 4230295Abstract: A supporting device is disclosed for an arrangement of articulated elements such as a fin-rudder arrangement, wing-trailing edge flap arrangement, and the like, for aircraft or watercraft. The disclosure more particularly relates to the cover for the gap existing between the two articulated elements. There is disclosed an arrangement of levers and bearing points which allow the cover to maintain a constant length and approximately constant curvature over its length as the two elements move relatively to each other. The arrangement of the disclosure eliminates corners and folds in the elastic cover without also requiring parts protruding beyond the elastic cover and without requiring high forces to deflect the cover.Type: GrantFiled: December 11, 1978Date of Patent: October 28, 1980Inventor: Richard Eppler
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Patent number: 4205996Abstract: Although free of CoO, the present spinel ceramic pigments have intensity of black coloration comparable to those using cobalt; they are nickel-rich, selected compositions in the NiO-MnO-CuO-Fe.sub.2 O.sub.3 -Cr.sub.2 O.sub.3 -Mn.sub.2 O.sub.3 -V.sub.2 O.sub.3 -Al.sub.2 O.sub.3 system, and they can be used with glaze frits containing up to about 10% ZnO.Type: GrantFiled: April 26, 1979Date of Patent: June 3, 1980Assignee: SCM CorporationInventor: Richard A. Eppler
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Patent number: 3967971Abstract: Disclosed are low-expansion, translucent, semicrystalline, whiteware ceramic bodies containing cordierite as the crystalline phase and advantageously having translucency suitable for use in fine dinnerware applications. The ceramic bodies can be fired in commercial kilns which characteristically require at least a 100.degree.F firing range. The raw materials are specified proportions of talc containing low levels of iron oxide and titania; kaolin clay containing low levels of iron oxide and titania; alumina; and oxide-producing materials of akali or alkaline-earth aluminosilicates and certain oxides proportioned to yield a fired ceramic body composition in the range of 51.5 to 58 parts by weight SiO.sub.2, 28 to 36 parts by weight Al.sub.2 O.sub.3, 10 to 17 parts by weight MgO, and 4 to 10 parts by weight of certain other oxides wherein the parts by weight of SiO.sub.2 + Al.sub.2 O.sub.3 + MgO = 100 weight parts as a basis.Type: GrantFiled: December 31, 1975Date of Patent: July 6, 1976Assignee: SCM CorporationInventor: Richard A. Eppler