Patent application number | Description | Published |
20090308661 | Exhaust valve and bit assembly for down-hole percussive drills - A bit assembly is for a percussive drill that includes a casing with an interior chamber and includes a bit connectable with the casing and having a longitudinal bore and an axis through the bore. The bore has a retainer portion with one or more generally. conical inner surfaces extending circumferentially about and facing generally toward the axis. A generally cylindrical valve has a longitudinal passage with an inlet fluidly connectable with the casing chamber and an outlet fluidly connectable with the bit central bore and an axis through the passage. An engagement portion with at least one generally conical outer surface extends circumferentially about and faces generally away from the valve axis. The valve engagement portion is disposable within the bit bore retainer portion such that the valve conical outer surface is disposed within and against the bit conical inner surface to retain the valve coupled with the bit. | 12-17-2009 |
20100282509 | VARIABLE FREQUENCY CONTROL FOR DOWN HOLE DRILL - A variable frequency down hole drill, includes a drill bit, a reciprocating piston operable to deliver an impact load to the drill bit, and means for changing the frequency with which the piston delivers impact loading to the drill bit, also resulting in a change in overall power of the drill. The means for changing frequency and overall power may operate during continuous operation of the drill. The means for changing the frequency and overall power may include a valve for selectively changing the effective volume of a drive or return chamber, an actuator for changing the timing of placing the drive or return chamber in communication with exhaust, or a system for changing the frequency in response to sensing an predetermined operating parameter of the drill, such as pressure or piston position. | 11-11-2010 |
20110232922 | FOOT VALVE ASSEMBLY FOR A DOWN HOLE DRILL - A retaining assembly for a cylindrical member and support sleeve in the bore of a component of a DTH. The cylindrical member and support sleeve may, for example, be a foot valve assembly for insertion into a counter bore in a bit. The cylindrical member has a cylindrical member rigidity and at least a portion of the support sleeve has a rigidity greater than the cylindrical member rigidity. A gap is provided between the sleeve and the component bore of the DTH. The cylindrical member deforms in the gap, resulting in the cylindrical member being fixedly sandwiched between the support sleeve and the component bore. | 09-29-2011 |
Patent application number | Description | Published |
20100263932 | BIT RETAINER ASSEMBLY FOR A DOWN-HOLE DRILL - A retainer device for a drill bit, an earth-boring drill assembly and methods of retaining a drill bit and operating drill assembly. The earth-boring drill assembly includes a casing having a central axis, the bit having a generally cylindrical head. The retainer device includes an annular sleeve connectable to the casing and a retainer assembly provided between the sleeve and the bit. The retainer assembly includes an axial slot defined by one of the sleeve and the bit, the slot having an axially-extending side wall defining an opening and an axial end wall, and a lug supported on the other of the sleeve and the bit, the lug being positionable in the slot through the opening in the side wall, the lug being engageable with the end wall to restrict axial movement of the bit from the sleeve and away from the casing. | 10-21-2010 |
20100264608 | CHUCK ASSEMBLY FOR A DOWN-HOLE DRILL - A chuck assembly, an assembly for an earth-boring drill assembly, and a method of retaining a drill bit for an earth-boring drill assembly, the drill assembly including a casing. The assembly includes a drill bit having a generally cylindrical head, a chuck connectable to the casing and operable to support the bit, the chuck having an outer surface with a radially-outwardly extending chuck ridge, an axially-extending first slot being defined in the ridge, a sleeve having an inner surface with a radially-inwardly extending sleeve ridge engageable with the chuck ridge to limit axial movement of the sleeve relative to the chuck, the sleeve having a first lug supported on the inner surface, the first lug being positionable in the first slot to limit relative rotational movement between the sleeve and the chuck. The assembly may also include a retainer assembly provided between the sleeve and the bit. | 10-21-2010 |
20110155471 | DRIVE PIN SUPPORT - A chuck assembly, an assembly for an earth-boring drill assembly, and a method of manufacturing a chuck assembly. In the assembly, a first portion of the chuck bore may have a minimum inner diameter greater than the chuck spline maximum inner diameter. A support ring recess may be defined in the bore axially between the chuck splines and the first end. A support ring may be positionable in the support ring recess, and the support ring, when positioned in the support ring recess, may have a support ring inner diameter less than the minimum inner diameter of the first portion of the bore. The drive pin may be positionable circumferentially between one of the chuck splines and an associated one of the bit splines and have an axial end surface at least partially engageable with the support ring to limit axial movement of the drive pin toward the first end. | 06-30-2011 |
20120103692 | METHOD AND SYSTEM FOR DRILLING USING GAS AS A DRILLING FLUID - A system and method of drilling. The method may generally include providing a drilling system including a rotary motor operable to rotationally drive a drill bit and providing a supply of compressible drill fluid, the supply producing an operating volumetric flow rate of fluid in a normal operating condition. The rotary motor operates at a rotational operating speed under a first volumetric flow rate of fluid, and the supply provides a volumetric flow rate of fluid greater than the first volumetric flow rate of fluid. The method further includes supplying the first volumetric flow rate of fluid from the supply to the rotary motor, and diverting a portion of fluid flow from the supply through a jet sub. | 05-03-2012 |
Patent application number | Description | Published |
20130209754 | LOW DIELECTRIC PHOTOIMAGEABLE COMPOSITIONS AND ELECTRONIC DEVICES MADE THEREFROM - This invention relates generally to silicon based photoresist compositions that can be used in forming low k dielectric constant materials suitable for use in electronic devices, methods of their use and the electronic devices made therefrom. | 08-15-2013 |
20140370444 | ANTIREFLECTIVE COATING COMPOSITION AND PROCESS THEREOF - The present invention relates to an absorbing hard mask antireflective coating composition comprising a novel polymer, where the novel polymer comprises in the backbone of the polymer four repeat units -A-, -B-, -C- and -D-, where A is repeat unit which comprises a fused aromatic ring in its backbone, B has the structure (1), C is a hydroxylbiphenyl of structure (2) and D is a derivatized fluorene of structure (3), | 12-18-2014 |
20150064904 | STABLE METAL COMPOUNDS AS HARDMASKS AND FILLING MATERIALS, THEIR COMPOSITIONS AND METHODS OF USE - The present invention relates to novel, soluble, multi-ligand-substituted metal oxide compounds to form metal oxide films with improved stability as well as compositions made from them and methods of their use. | 03-05-2015 |
Patent application number | Description | Published |
20090026889 | COMPONENT FOR PIEZOELECTRIC FORCE OR PRESSURE SENSORS, HELD TOGETHER BY AN ELECTRICALLY INSULATING FILM - The invention relates to a component for installation in force or pressure sensors, in particular in a glow plug. The component comprises a disc-type or punched-disc type measuring element consisting of a piezoelectric material, punched-disc type or disc-type electrodes that lie on either side of the measuring element. The electrodes have contact points for contacting conductors. The component comprises in addition a respective transmission body or several transmission bodies that are located outside the electrodes, on either side of the latter. The measuring element, electrodes and transmission bodies are held together mechanically by an external, electrically insulating film. | 01-29-2009 |
20090165739 | SHEATHED-ELEMENT GLOW PLUG - A sheathed-element glow plug is used to be situated in a chamber in an internal combustion engine. The sheathed-element glow plug has a housing, a pin-shaped heating element, which extends partially from the housing and a pressure sensor which is situated in an inner chamber of the housing. A prestressing sleeve is provided, in this context, which applies a prestressing to the pressure sensor. | 07-02-2009 |
20090260434 | MEMBRANE PROTECTION FOR A SENSOR HAVING A MEMBRANE, AND SENSOR HAVING A MEMBRANE AND MEMBRANE PROTECTION - The invention describes membrane protections for a sensor having a membrane, which membrane protection does not increase the external diameter of a sensor and can be easily removed from a hole in which the sensor is installed. The membrane protection can be fastened to an inner surface of a front region of a sensor using a clip system and thus forms a unit with the sensor. The membrane protection for a sensor which can be screwed into a hole of an installation part and is provided with a membrane in the front region. The membrane protection has a clip system in order to be internally fastened in the front region of such a sensor. The sensor has a membrane protection which is internally fitted to the front region of the sensor using a clip system. | 10-22-2009 |
20110005308 | Pressure Measuring Device - A pressure measuring device suitable for disposition in a chamber of an internal combustion engine. The pressure measuring device has a housing, a force transmitting element that is effectively connected to a pressure sensor, and a sensor cage that surrounds the pressure sensor. The sensor cage is connected to the housing by a circumferential weld seam only at one connection segment of the housing. In this way, it is possible to achieve a defined pre-tensioning of a metal diaphragm that is connected on the one hand to the sensor cage and on the other hand to the force transmitting element. | 01-13-2011 |
Patent application number | Description | Published |
20110292990 | MULTIPLE-INPUT, ON-CHIP OSCILLOSCOPE - An integrated circuit that includes a receive data path is described. The receive data path: equalizes a received analog signal, converts the resulting equalized analog signal to digital data values based on a clock signal, and recovers the clock signal in the digital data values. The integrated circuit also includes an on-chip oscilloscope. The oscilloscope includes: two comparators, a phase rotator that outputs an oscilloscope clock signal whose phase can be varied relative to that of the recovered clock signal, and an offset circuit that outputs a voltage offset. Based on the voltage offset and the oscilloscope clock signal, the comparators output digital values which can be used to determine eye patterns that correspond to the analog signal before and after equalization. The eye patterns can then be correlated with an error rate associated with the received data. | 12-01-2011 |
20110302452 | CIRCUITRY TO FACILITATE TESTING OF SERIAL INTERFACES - Circuitry to facilitate testing of serial interfaces is described. Specifically, some embodiments of the present invention facilitate testing the clock and data recovery functionality of a receiver. A serial interface can include a multiplying phase locked loop (MPLL) clock generator, a transmitter, and a receiver. The MPLL clock generator can generate a first clock signal and a second clock signal, and can vary a phase and/or frequency difference between the first clock signal and the second clock signal. During test, the transmitter and the receiver can be directly or capacitively coupled to each another. Specifically, during test, the serial interface can be configured so that the transmitter transmits data using the first clock signal, and the receiver receives data using the second clock signal. The clock and data recovery functionality of the receiver can be tested by comparing the transmitted data with the received data. | 12-08-2011 |
20110307722 | REDUCING POWER CONSUMPTION IN CLOCK AND DATA RECOVERY SYSTEMS - Some embodiments provide a clock and data recovery (CDR) system to recover clock and data information from an analog signal. The CDR system may include an integral path and a proportional path that are part of an integral-proportional control loop. The integral path may be used to track frequency changes in a clock signal that is embedded in the analog signal, while the proportional path may be used to track phase changes in the clock signal that is embedded in the analog signal. The proportional path may be executed at a first clock frequency, while the integral path may be executed at a second clock frequency that is lower than the first clock frequency to reduce the power consumption of the CDR system. | 12-15-2011 |
20110309857 | CIRCUITRY FOR MATCHING THE UP AND DOWN IMPEDANCES OF A VOLTAGE-MODE TRANSMITTER - Some embodiments of the present invention provide a voltage-mode transmitter. The transmitter can include configuration circuitry, bias circuitry, and a set of driver slices. Each driver slice can include driver transistors which drive an output value. The outputs of each driver slice can be directly or capacitively coupled with the transmitter's outputs. Each driver slice can also include one or more impedance-matching transistors which are serially coupled to at least some of the driver transistors. The configuration circuitry can configure a subset of driver slices so that the down (or up) impedance of the transmitter is within a first tolerance of a desired impedance value. The bias circuitry can bias the one or more impedance-matching transistors in each driver slice in the subset of driver slices so that the up (or down) impedance is within a second tolerance of the down (or up) impedance. | 12-22-2011 |
20110310942 | HIGHLY FLEXIBLE FRACTIONAL N FREQUENCY SYNTHESIZER - One embodiment of the present invention provides a phase-locked loop (PLL) for synthesizing a fractional frequency. The PLL can include a 1/N frequency divider, a voltage-controlled oscillator (VCO), a programmable phase mixer, and a phase detector. The programmable phase mixer can be coupled between an output of the VCO and an input of the frequency divider, wherein the programmable phase mixer is configured to receive the output clock signal from the VCO and generate a first clock signal of frequency f | 12-22-2011 |
20110310947 | METHOD AND APPARATUS FOR PERFORMING ADAPTIVE EQUALIZATION - Systems and techniques for adapting and/or optimizing an equalizer of a receiver are described. The equalizer's behavior can be adjusted by modifying one or more equalization parameters. At the beginning of the adaptation and/or optimization process, the system can determine robust initial values for the one or more equalization parameters. The system can then adapt and/or optimize the equalizer by iteratively adjusting the one or more equalization parameters. Specifically, in each iteration, the system can use the receiver's clock and data recovery (CDR) circuitry to determine the number of early and late data transitions associated with one or more data patterns. Next, the system can adjust the one or more equalization parameters so that, for each data pattern in the one or more data patterns, the ratio between the number of early data transitions and the number of late data transitions is substantially equal to a desired value. | 12-22-2011 |
20110311009 | PATTERN AGNOSTIC ON-DIE SCOPE - An on-die scope is described. The on-die scope can include one or more scope slicers, phase sweeping circuitry, voltage sweeping circuitry, and eye-diagram data collection circuitry. The clock and data recovery circuitry can receive an input signal, and output a recovered clock signal and a recovered bit-stream. The phase sweeping circuitry can receive the recovered clock signal, and output the scope clock signal by adding a phase offset to the recovered clock signal. A scope slicer can receive the voltage threshold, the scope clock signal, and the input signal, and output a scope bit-stream. The eye-diagram data collection circuitry can detect one or more bit-patterns in the recovered bit-stream, and modify values of one or more scope counters based solely or partly on the scope bit-stream and the recovered bit-stream. | 12-22-2011 |
20150070051 | HIGH SPEED PHASE SELECTOR WITH A GLITCHLESS OUTPUT USED IN PHASE LOCKED LOOP APPLICATIONS - A digital phase selector circuit that switches an output clock between N input clock phases is described. The phase selector utilizes a special output mux and switches clock phases during a safe zone to avoid glitches. The phase selector is used in the feedback path of a PLL to implement functions such as spread spectrum or fractional reference clocks. An example with N=4 and an optimized latch mux is shown. | 03-12-2015 |
20150071393 | LOW POWER DIGITAL FRACTIONAL DIVIDER WITH GLITCHLESS OUTPUT - A digital circuit that divides a high speed digital clock by a fractional value is described. The circuit utilizes a divider circuit and shifts the divider clock by a fraction of a phase to achieve the desired fractional division. A clock mux is used to perform the clock shift, and a masking mux is used to eliminate glitches during the clock shift. | 03-12-2015 |