Patents by Inventor Charles S. Davis
Charles S. Davis 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: 9109641Abstract: A friction clutch pack exhibiting improved high speed stability includes a first plurality of friction plates or discs preferably having friction material on both faces interleaved with a second plurality of thicker reaction plates or discs. The friction plates comprise a formed core plate having multiple obliquely oriented or angularly offset sinusoidal waves. Male splines around the periphery of each friction plate engage complementary splines on a cylindrical housing. The reaction plates are flat and thicker than the friction plates and include female splines around an inner opening which engage complementary splines on a shaft or quill.Type: GrantFiled: October 23, 2013Date of Patent: August 18, 2015Assignee: GM GLOBAL TECHNOLOGY OPERATIONS, LLCInventors: John M. Kremer, Charles S. Davis, Jeffrey J. McFarland, Larry D. Diemer
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Patent number: 8919517Abstract: An annular core plate for a multiplate clutch assembly includes a main annular portion and an engagement annular portion extending from the main annular portion. The engagement annular portion has teeth extending therefrom. The teeth are thicker than the main annular portion. A multiplate clutch assembly is provided that includes at least one annular core plate or friction plate and at least one annular separator plate. A method of constructing at least one plate for a multiplate clutch assembly is also provided. The method includes forming an annular separator plate from sheet metal by removing a circular section from a separator plate main body portion of the sheet metal, removing a portion of the circular section to form teeth in the circular section, and attaching the circular section to an annular plate.Type: GrantFiled: March 29, 2012Date of Patent: December 30, 2014Assignee: GM Global Technology Operations, LLCInventors: Robert Alan Dziurda, Charles S. Davis
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Publication number: 20140158494Abstract: A friction clutch pack exhibiting improved high speed stability includes a first plurality of friction plates or discs preferably having friction material on both faces interleaved with a second plurality of thicker reaction plates or discs. The friction plates comprise a formed core plate having multiple obliquely oriented or angularly offset sinusoidal waves. Male splines around the periphery of each friction plate engage complementary splines on a cylindrical housing. The reaction plates are flat and thicker than the friction plates and include female splines around an inner opening which engage complementary splines on a shaft or quill.Type: ApplicationFiled: October 23, 2013Publication date: June 12, 2014Applicant: GM Global Technology Operations LLCInventors: John M. KREMER, Charles S. DAVIS, Jeffrey J. MCFARLAND, Larry D. DIEMER
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Patent number: 8434607Abstract: A torque transmitting device for transmitting torque between a first and second members includes an annular piston that defines an axis and an apply plate translatable along the axis between an unengaged position and an engaged position. The apply plate has a first end disposed radially inward of a second end and is in contact with the piston. An apply disc is rotationally coupled to the first member and is translatable between unengaged and engaged positions. The apply disc is disposed radially outward of the piston. A backing disc is rotationally and axially fixed to the first member and disposed radially outward of the piston. A friction plate is disposed between the apply disc and the backing disc. The friction plate has a first end disposed radially inward of a second end and is rotationally coupled to the second member. The friction plate is disposed radially outward of the piston.Type: GrantFiled: February 23, 2010Date of Patent: May 7, 2013Assignee: GM Global Technology Operations LLCInventors: Anton W. Nausieda, Michael H. Welch, Charles S. Davis, Tami A. Curtis, Zhipeng Han
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Publication number: 20120181136Abstract: An annular core plate for a multiplate clutch assembly includes a main annular portion and an engagement annular portion extending from the main annular portion. The engagement annular portion has teeth extending therefrom. The teeth are thicker than the main annular portion. A multiplate clutch assembly is provided that includes at least one annular core plate or friction plate and at least one annular separator plate. A method of constructing at least one plate for a multiplate clutch assembly is also provided. The method includes forming an annular separator plate from sheet metal by removing a circular section from a separator plate main body portion of the sheet metal, removing a portion of the circular section to form teeth in the circular section, and attaching the circular section to an annular plate.Type: ApplicationFiled: March 29, 2012Publication date: July 19, 2012Applicant: GM Global Technology Operations LLCInventors: Robert Alan Dziurda, Charles S. Davis
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Publication number: 20120145508Abstract: A annular core plate for a multiplate clutch assembly includes a spline with a plurality of teeth. At least one of the plurality of teeth is either partially or fully extruded to a thickness greater than the thickness of a base material for the core plate. The spline may be disposed around the inner surface of the annular core plate or may be disposed around the outer surface of the core plate. The core plate can be a core plate associated with a friction plate or can be a core plate associated with a separator plate.Type: ApplicationFiled: December 14, 2010Publication date: June 14, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Robert Alan Dziurda, Charles S. Davis
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Publication number: 20110203894Abstract: A torque transmitting device for transmitting torque between a first and second members includes an annular piston that defines an axis and an apply plate translatable along the axis between an unengaged position and an engaged position. The apply plate has a first end disposed radially inward of a second end and is in contact with the piston. An apply disc is rotationally coupled to the first member and is translatable between unengaged and engaged positions. The apply disc is disposed radially outward of the piston. A backing disc is rotationally and axially fixed to the first member and disposed radially outward of the piston. A friction plate is disposed between the apply disc and the backing disc. The friction plate has a first end disposed radially inward of a second end and is rotationally coupled to the second member. The friction plate is disposed radially outward of the piston.Type: ApplicationFiled: February 23, 2010Publication date: August 25, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Anton W. Nausieda, Michael H. Welch, Charles S. Davis, Tami A. Curtis, Zhipeng Han
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Publication number: 20040199417Abstract: Techniques are disclosed for assessing information technology products by comparing a product (including a product still under development) to a set of criteria. Each of the criteria may have one or more attributes, and may be different in priority from one another. The comparison is preferably directed toward ensuring, and/or improving, the product's acceptance by its target marketplace or market segment. In preferred embodiments, a product assessment score is created as a result of the comparison. When necessary, a set of recommendations for product changes is also created. The criteria/attributes may be prioritized in view of their importance to the target marketplace or market segment, and the assessment results are preferably provided to product teams to influence the importance of product planning and/or development efforts.Type: ApplicationFiled: July 2, 2003Publication date: October 7, 2004Applicant: International Business Machines CorporationInventors: Randy D. Baxter, William L. Bliss, Stephen Biondi, Robert J. Bojanek, James E. Carey, Thomas D. Christopherson, Charles S. Davis, Kathleen A. Diedrich, Charles S. Gauthier, Uwe K. Hansmann, Katherine A. Imming, Pamela A. Kaplan, Roger Q. Kerr, Brian L. Peterson, Thomas P. Pitzen, Christopher H. Wicher
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Patent number: 4938484Abstract: A game ball engaging and manipulating device including frame bar members, sling and connecting means. The sling includes a generally rectangular fabric section having its long sides connected to elastic cord. The frame bar members are connected to both the short side of the fabric section. The frame members each consist of a cylindrical bar made of wood or other suitable material. One end of each bar is attached to the sling. The sling is connected to the bar so that the bars rotate independently in relation to the sling. The sling includes a pocket portion in the middle of the sling. The opposite end of each bar possesses a molded handle to allow ease and comfort of gripping and using the device. The game ball engaging and manipulating device is held by the user with one hand gripping each handle and the ball is manipulated, catapulted, snapped forward and engaged in a pocket formed in the sling.Type: GrantFiled: November 14, 1988Date of Patent: July 3, 1990Inventor: Charles S. Davis, Jr.
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Patent number: 4722037Abstract: Optical assemblies having a plurality of light sources of differing spectral characteristics utilize holographic optical elements to produce a separate beam pattern for each light source. The optical assemblies are useful, for example, for producing high and low beams of an automobile headlight.Type: GrantFiled: August 15, 1986Date of Patent: January 26, 1988Inventor: Charles S. Davis
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Patent number: 4713738Abstract: Light fixtures achieve improved efficiency by utilizing a reflective holographic optical element to direct light from a light source to a task area. The light fixture can employ any conventional source of artificial incoherent light positioned relative to the reflective holographic optical element such that the reflected light is collimated to provide efficient illumination of the task area.Type: GrantFiled: August 15, 1986Date of Patent: December 15, 1987Inventor: Charles S. Davis
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Patent number: 4704666Abstract: Light sources having a holographic optical element incorporated in the envelope surrounding the radiation source provide efficient lighting of selected task area. Multilayer holographic optical elements may be employed in combination with known sources of white light such as incandescent filaments to form improved light bulbs, flourescent tubes and the like.Type: GrantFiled: August 15, 1986Date of Patent: November 3, 1987Inventor: Charles S. Davis
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Patent number: 4536833Abstract: A lighting fixture utilizing a spatially fixed light source and a multi-layered hologram as a lens element. The hologram receives light from the source and directs it to a task area. The layers of the lens element are responsive to light of one or more wavelengths of interest and varying angles of incident radiation so as to diffract light from the source toward the task area.Type: GrantFiled: April 16, 1984Date of Patent: August 20, 1985Assignee: Knoll International, Inc.Inventor: Charles S. Davis
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Patent number: 4285532Abstract: A book marker useful to mark a page in a book as well as hold a page down while the book is being read is disclosed. The device has a frame which supports and guides a pair of cover engaging members. These markers have elongated C-shaped portions which hook over the upper and lower edges of a book cover and are biased towards one another. An arm is pivotally attached to an outer corner of one of the C-shaped portions. The end of the arm has a swingable page marker extending over the page of the book. Preferably this page marker is a thin stiff wire that minimizes any obstructions to reading the book. The arm is spring loaded causing the page marker to press against the page. This page marker can be swung out of the way when desired, for example when the book is first mounted or when a great number of pages are to be advanced. The device assists the reader by keeping the pages on one side of the book held down during reading, as well as marking the place when the book is closed.Type: GrantFiled: November 30, 1979Date of Patent: August 25, 1981Assignee: Leonard RussoInventor: Charles S. Davis
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Patent number: 4116352Abstract: A pressure-type containment device with an improved lid sealing feature is disclosed. A lid disk seats on a shoulder along the interior wall of a container mouth and is held in place by a fastening ring adapted to fit into the container mouth. A resilient gasket, such as an O-ring, is wedged between the fastening ring and the lid disk along the interior wall of the mouth. The margin of the fastening ring confronting the gasket is tapered to urge the gasket against the interior wall. A pressure increase within the container expanding the lid disk causes compression of the gasket, enhancing the seal.Type: GrantFiled: November 1, 1976Date of Patent: September 26, 1978Assignee: Leonard RussoInventor: Charles S. Davis
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Patent number: 4014886Abstract: Novel 2-substituted-5,6-dimethoxyindazoles of the formula: ##STR1## where R is cyclohexyl, phenethyl, phenyl, dimethylamino, aminoalkyl, methoxyethyl, indazolylethyl, tetrahydropyranylmethyl, p-dimethylaminophenyl, 2-hydroxyethyl, allyl, thiazolyl, pyridyl, 2,3-dihydroxypropyl, and hydroxy are useful as central nervous system depressants or hypotensive agents.Type: GrantFiled: February 25, 1976Date of Patent: March 29, 1977Assignee: Morton-Norwich Products, Inc.Inventors: Thomas J. Schwan, Charles S. Davis, LeRoy J. Honkomp
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Patent number: 4014878Abstract: Novel 2-substituted-5,6-dimethoxyindazoles of the formula: ##STR1## where R is cyclohexyl, phenethyl, phenyl, dimethylamino, aminoalkyl, methoxyethyl, indazolylethyl, tetrahydropyranylmethyl, p-dimethylaminophenyl, 2-hydroxyethyl, allyl, thiazolyl, pyridyl, 2,3-dihydroxypropyl, and hydroxy are useful as central nervous system depressants or hypotensive agents.Type: GrantFiled: February 25, 1976Date of Patent: March 29, 1977Assignee: Morton-Norwich Products, Inc.Inventors: Thomas J. Schwan, Charles S. Davis, LeRoy J. Honkomp
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Patent number: 4009177Abstract: Novel 2-substituted-5,6-dimethoxyindazoles of the formula: ##STR1## where R is cyclohexyl, phenethyl, phenyl, dimethylamino, aminoalkyl, methoxyethyl, indazolylethyl, tetrahydropyranylmethyl, p-dimethylaminophenyl, 2-hydroxyethyl, allyl, thiazolyl, pyridyl, 2,3-dihydroxypropyl, and hydroxy are useful as central nervous system depressants or hypotensive agents.Type: GrantFiled: February 25, 1976Date of Patent: February 22, 1977Assignee: Morton-Norwich Products, Inc.Inventors: Thomas J. Schwan, Charles S. Davis, LeRoy J. Honkomp
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Patent number: 4002652Abstract: Novel 2-substituted-5,6-dimethoxyindazoles of the formula: ##STR1## where R is cyclohexyl, phenethyl, phenyl, dimethylamino, aminoalkyl, methoxyethyl, indazolylethyl, tetrahydropyranylmethyl, p-dimethylaminophenyl, 2-hydroxyethyl, allyl, thiazolyl, pyridyl, 2,3-dihydroxypropyl, and hydroxy are useful as central nervous system depressants or hypotensive agents.Type: GrantFiled: February 25, 1976Date of Patent: January 11, 1977Assignee: Morton-Norwich Products, Inc.Inventors: Thomas J. Schwan, Charles S. Davis, LeRoy J. Honkomp
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Patent number: 3966760Abstract: Novel 2-substituted-5,6-dimethoxyindazoles of the formula: ##SPC1##Where R is cyclohexyl, phenethyl, phenyl, dimethylamino, aminoalkyl, methoxyethyl, indazolylethyl, tetrahydropyranylmethyl, p-dimethylaminophenyl, 2-hydroxyethyl, allyl, thiazolyl, pyridyl, 2,3-dihydroxypropyl, and hydroxy are useful as central nervous system depressants or hypotensive agents.Type: GrantFiled: May 23, 1974Date of Patent: June 29, 1976Assignee: Morton-Norwich Products, Inc.Inventors: Thomas J. Schwan, Charles S. Davis, Leroy J. Honkomp