| Patent application number | Description | Published |
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| 20090032310 | EARTH-BORING TOOLS HAVING PARTICLE-MATRIX COMPOSITE BODIES, METHODS FOR WELDING PARTICLE-MATRIX COMPOSITE BODIES AND METHODS FOR REPAIRING PARTICLE-MATRIX COMPOSITE BODIES - Methods for welding a particle-matrix composite body to another body and repairing particle-matrix composite bodies are disclosed. Additionally, earth-boring tools having a joint that includes an overlapping root portion and a weld groove having a face portion with a first bevel portion and a second bevel portion are disclosed. In some embodiments, a particle-matrix bit body of an earth-boring tool may be repaired by removing a damaged portion, heating the particle-matrix composite bit body, and forming a built-up metallic structure thereon. In other embodiments, a particle-matrix composite body may be welded to a metallic body by forming a joint, heating the particle-matrix composite body, melting a metallic filler material forming a weld bead and cooling the welded particle-matrix composite body, metallic filler material and metallic body at a controlled rate. | 02-05-2009 |
| 20100263935 | EARTH BORING ROTARY DRILL BITS AND METHODS OF MANUFACTURING EARTH BORING ROTARY DRILL BITS HAVING PARTICLE MATRIX COMPOSITE BIT BODIES - Methods of forming bit bodies for earth-boring bits include assembling green components, brown components, or fully sintered components, and sintering the assembled components. Other methods include isostatically pressing a powder to form a green body substantially composed of a particle-matrix composite material, and sintering the green body to provide a bit body having a desired final density. Methods of forming earth-boring bits include providing a bit body substantially formed of a particle-matrix composite material and attaching a shank to the body. The body is provided by pressing a powder to form a green body and sintering the green body. Earth-boring bits include a unitary structure substantially formed of a particle-matrix composite material. The unitary structure includes a first region configured to carry cutters and a second region that includes a threaded pin. Earth-boring bits include a shank attached directly to a body substantially formed of a particle-matrix composite material. | 10-21-2010 |
| 20100276205 | METHODS OF FORMING EARTH-BORING ROTARY DRILL BITS - Methods of forming earth-boring rotary drill bits include providing a bit body, providing a shank that is configured for attachment to a drill string, and attaching the shank to the bit body. Providing a bit body includes providing a green powder component having a first region having a first composition and a second region having a second, different composition, and at least partially sintering the green powder component. Other methods include providing a powder mixture, pressing the powder mixture to form a green component, and sintering the green component to a final density. A shank is provided that includes an aperture, and a feature is machined in a surface of the bit body. The aperture is aligned with the feature, and a retaining member is inserted through the aperture. An earth-boring bit includes a bit body comprising a particle-matrix composite material including a plurality of hard particles dispersed throughout a matrix material. A shank is attached to the bit body using a retaining member. | 11-04-2010 |
| 20110079446 | EARTH-BORING TOOLS AND COMPONENTS THEREOF AND METHODS OF ATTACHING COMPONENTS OF AN EARTH-BORING TOOL - Methods for welding a fixed-cutter bit body to a shank of an earth-boring bit are disclosed. An interface may be formed between the fixed-cutter bit body and the shank, and the interface may be friction stir welded. In some embodiments, the fixed-cutter bit body and the shank may overlap proximate to an exterior surface of the earth-boring bit. Methods for welding at least two portions of a bit body of a roller cone bit are also disclosed. An interface may formed between the at least two portions of the bit body of the roller cone bit and the interface may be friction stir welded. Earth-boring rotary drill bits formed using such methods are also disclosed. | 04-07-2011 |
| Patent application number | Description | Published |
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| 20080240420 | METHOD AND SYSTEM FOR A RECURSIVE SECURITY PROTOCOL FOR DIGITAL COPYRIGHT CONTROL - Systems and methods are described which utilize a recursive security protocol for the protection of digital data. These may include encrypting a bit stream with a first encryption algorithm and associating a first decryption algorithm with the encrypted bit stream. The resulting bit stream may then be encrypted with a second encryption algorithm to yield a second bit stream. This second bit stream is then associated with a second decryption algorithm. This second bit stream can then be decrypted by an intended recipient using associated keys. | 10-02-2008 |
| 20090052662 | METHOD AND SYSTEM FOR A RECURSIVE SECURITY PROTOCOL FOR DIGITAL COPYRIGHT CONTROL - Systems and methods are described which utilize a recursive security protocol for the protection of digital data. These may include encrypting a bit stream with a first encryption algorithm and associating a first decryption algorithm with the encrypted bit stream. The resulting bit stream may then be encrypted with a second encryption algorithm to yield a second bit stream. This second bit stream is then associated with a second decryption algorithm. This second bit stream can then be decrypted by an intended recipient using associated keys. | 02-26-2009 |
| 20100008529 | Speakerphone Including a Plurality of Microphones Mounted by Microphone Supports - In various embodiments, a speakerphone may comprise multiple (e.g., 16) microphones placed in a circular array around a central speaker. Each microphone may be mounted to the speakerphone through a microphone support. The microphone support may be made of a flexible material and have various features designed to minimize interference to the microphone (e.g., from the speaker and/or vibrations external to the speakerphone). The centrally mounted speaker may be coupled to a stiff internal speaker enclosure. The speaker enclosure may be made of a stiff, heavy material (e.g., a dense plastic) to prevent the speaker vibrations from excessively vibrating the speakerphone enclosure (which may affect the microphones). | 01-14-2010 |
| 20100122088 | METHOD AND SYSTEM FOR CONTROL OF CODE EXECUTION ON A GENERAL PURPOSE COMPUTING DEVICE AND CONTROL OF CODE EXECUTION IN A RECURSIVE SECURITY PROTOCOL - Embodiments of systems and methods which provide highly specific control over the execution of general-purpose code block are disclosed. These embodiments may allow the exact circumstances under which a given code block is allowed to execute to be determined with specificity. Such a control mechanism may be coupled with embodiments of a data hiding system and method, based for example, on an ordered execution of a set of code segments implemented via recursive execution. When embodiments of these systems and methods are utilized together an unencumbered generality as well as a level of protection against attack that surpasses many other security systems may be obtained. | 05-13-2010 |
| 20100235644 | Method and System for a Recursive Security Protocol for Digital Copyright Control - Systems and methods are described which utilize a recursive security protocol for the protection of digital data. These may include encrypting a bit stream with a first encryption algorithm and associating a first decryption algorithm with the encrypted bit stream. The resulting bit stream may then be encrypted with a second encryption algorithm to yield a second bit stream. This second bit stream is then associated with a second decryption algorithm. This second bit stream can then be decrypted by an intended recipient using associated keys. | 09-16-2010 |
