Abstract: A head mounted display (HMD) comprises an eye tracking system configured to enable eye-tracking using light. The eye tracking system comprises two or more illumination sources positioned relative to one another and an optical detector in order to capture. The optical detector is configured to capture images of the cornea based on one or more reflections. The eye tracking unit is configured to generate a model of the user's eye. The generated eye model is used to determine eye tracking information such as gaze direction as the user glances at different objects in the HMD.

Abstract: Illustrative embodiments of diaphragm pumps having an automatic priming function, as well as related systems and methods, are disclosed. In one illustrative embodiment, a method of priming a diaphragm pump includes sensing, with a pressure sensor disposed at a fluid outlet of the diaphragm pump, a pressure of a fluid being pumped by the diaphragm pump, transmitting a pressure signal associated with the sensed pressure from the pressure sensor to a controller of the diaphragm pump, and identifying, on the controller, whether the diaphragm pump is primed by determining whether a characteristic of the pressure signal has reached a threshold.

Abstract: Illustrative embodiments of positive displacement pumps utilizing pressure compensating calibration, as well as related systems and methods, are disclosed. In one illustrative embodiment, a method of operating a positive displacement pump includes sensing, with a pressure sensor disposed at a fluid outlet of the positive displacement pump, a back pressure at the fluid outlet, transmitting a pressure signal associated with the sensed back pressure from the pressure sensor to a controller of the positive displacement pump, and identifying, on the controller, a volume of fluid pumped by the positive displacement pump using the pressure signal.

Abstract: An eye tracking system, images the surface (e.g., sclera) of each eye of a user to capture an optical flow field resulting from a texture of the imaged surface. The eye tracking system includes illumination source (e.g., laser) and a detector (e.g., camera). The source illuminates a portion of the eye that is imaged the camera. As the eye moves, different areas of the eye are imaged, allowing generation of a map of a portion of the eye. An image of a portion of the eye is includes a diffraction pattern (i.e., the optical flow) corresponding to the portion of the eye. Through a calibration process, the optical flow is mapped to a location where the eye is looking.

Abstract: Illustrative embodiments of impact tools are disclosed. In at least one illustrative embodiment, an impact tool comprises a motor including an output shaft configured to rotate about a first axis and a drive train configured to be driven by the output shaft of the motor and to drive rotation of an output drive about a second axis that is non-parallel to the first axis, wherein the drive train includes an impact mechanism comprising a hammer configured to rotate about a third axis to periodically deliver an impact load to an anvil, the third axis being parallel to and spaced apart from the second axis.

Abstract: A head mounted display (HMD) comprises an eye tracking system configured to enable eye-tracking using light. The eye tracking system comprises two or more illumination sources positioned relative to one another and an optical detector in order to capture. The optical detector is configured to capture images of the cornea based on one or more reflections. The eye tracking unit is configured to generate a model of the user's eye. The generated eye model is used to determine eye tracking information such as gaze direction as the user glances at different objects in the HMD.

Abstract: A head mounted display (HMD) comprises an eye tracking system configured to perform a calibration process using an eye tracking system of the HMD that includes determining a pupillary axis and/or determining an angular offset between the pupillary axis and the eye's true line of sight. The eye tracking system obtains an eye model captures images of the user's pupil while the user is looking at a target or other content displayed on the HMD. In some embodiments, the calibration process is based on a single image of the user's eye and is performed only once. For example, the process can be performed the first time the user uses the HMD, which stores the calibration data for the user in a memory for future use.

Abstract: An eye tracking system, images the surface (e.g., sclera) of each eye of a user to capture an optical flow field resulting from a texture of the imaged surface. The eye tracking system includes illumination source (e.g., laser) and a detector (e.g., camera). The source illuminates a portion of the eye that is imaged the camera. As the eye moves, different areas of the eye are imaged, allowing generation of a map of a portion of the eye. An image of a portion of the eye is includes a diffraction pattern (i.e., the optical flow) corresponding to the portion of the eye. Through a calibration process, the optical flow is mapped to a location where the eye is looking.

Abstract: The present invention provides methods and systems for a rotary impact device having an annular exterior surface for use with an impact wrench for providing torque to a fastener. The rotary impact device includes an input member having an input recess for receiving the anvil of the impact wrench, an output member having an output recess for receiving the fastener, and an inertia member. The inertia member is stationary and positioned on the exterior surface of the rotary impact device for increasing the torque applied to the fastener.

Abstract: In at least one illustrative embodiment, an angle impact tool may comprise a handle assembly extending along a first axis and supporting a motor, the motor including a shaft configured to rotate about the first axis, and a work attachment coupled to the handle assembly. The work attachment may comprise an impact mechanism including an anvil configured to rotate about a second axis that is non-parallel to the first axis and a hammer configured to rotate about the second axis to periodically deliver an impact load to the anvil, a gear assembly configured to transfer rotation from the shaft of the motor to the hammer of the impact mechanism, and a housing supporting the impact mechanism and the gear assembly. The housing may be partitioned along a first parting plane that is perpendicular to the second axis such that the housing includes first and second housing sections.

Abstract: The present invention provides methods and systems for a rotary impact device having an annular exterior surface for use with an impact wrench for providing torque to a fastener. The rotary impact device includes an input member having an input recess for receiving the anvil of the impact wrench, an output member having an output recess for receiving the fastener, and an inertia member. The inertia member is stationary and positioned on the exterior surface of the rotary impact device for increasing the torque applied to the fastener.

Abstract: An array of resilient floor tiles is assembled into a continuous sheet after being laid down. An array of included, sacrificial resistive wires is buried along the edges of the tiles and is controllably heated in order to cause welding of the edges of tiles across the paths of the wires to neighboring tiles. Subsequently the wires may be used to give the array integral tensile strength. The welded array is provided with greater strength for resisting use, expansive and contractile forces caused by environmental heat and cold and also long-term tile contraction owing to loss of plasticizer as may be seen with PVC-based tiles.

Abstract: An angle impact tool includes a handle assembly extending along a first axis, a prime mover in the handle, an output shaft rotatable about the first axis, and a work attachment connected to the handle assembly. An output drive is supported in the work attachment for rotation about an output axis perpendicular to the first axis. A gear assembly including a spur gear is positioned within the work attachment to transfer torque from the prime mover about the first axis to the output drive about the output axis. An impact mechanism is positioned within the work attachment and includes a hammer and an anvil. The hammer rotates under the influence of the prime mover and is operable to periodically deliver an impact load to the anvil. The output drive rotates about the output axis under the influence of the impact load being transmitted to the output drive by the anvil.

Abstract: According to an embodiment of the present invention, a computer implemented method and system for isolating variables in a behavior prediction model comprises: identifying a plurality of groups comprising a first group of variables and a second group of variables; building a model, using a computer processor, for capturing an effect of the first group of variables in predicting behavior for customers; building a subsequent stage of the model, using a computer processor, on a second group of variables to neutralize the effect of the first group of variables; displaying results of the model wherein the results minimize the effect of the first group of variables in predicting behavior at a user interface; and identifying a response based on the results for a segment of the customers.

Abstract: A method for determining an amount of electricity to purchase includes determining electrical power consumption characteristics of an electrical load at an end user of the electricity. A preference of the end user for an output of the electrical load is ascertained. The output varies with a rate of electrical power consumption by the load. A mathematical model is created of an amount of electrical power to be consumed by the load as a function of time and of monetary cost of the electricity. The model is dependent upon the electrical power consumption characteristics of the electrical load and the preference of the end user for an output of the electrical load. An amount of electricity is purchased based on the mathematical model of an amount of electrical power to be consumed by the load, and based on the monetary cost of the electricity.

Abstract: Illustrative embodiments of power tools with reversible, self-shifting transmissions are disclosed. In at least one illustrative embodiment, a power tool may comprise a motor having a motor shaft, an output shaft configured to be coupled to a tool element to rotate a fastener, and a transmission coupled between the motor shaft and the output shaft to transmit rotation from the motor shaft to the output shaft in a low-speed, high-torque mode and in a high-speed, low-torque mode. The transmission may be configured to self-shift between the low-speed, high-torque mode and the high-speed, low-torque mode in response to a change in a torque required to rotate the output shaft in both a clockwise direction and a counterclockwise direction.

Abstract: An angle impact tool includes a handle assembly extending along a first axis, a prime mover in the handle, an output shaft rotatable about the first axis, and a work attachment connected to the handle assembly. An output drive is supported in the work attachment for rotation about an output axis perpendicular to the first axis. A gear assembly including a spur gear is positioned within the work attachment to transfer torque from the prime mover about the first axis to the output drive about the output axis. An impact mechanism is positioned within the work attachment and includes a hammer and an anvil. The hammer rotates under the influence of the prime mover and is operable to periodically deliver an impact load to the anvil. The output drive rotates about the output axis under the influence of the impact load being transmitted to the output drive by the anvil.

Abstract: An angle impact tool includes a handle assembly extending along a first axis, a prime mover in the handle, an output shaft rotatable about the first axis, and a work attachment connected to the handle assembly. An output drive is supported in the work attachment for rotation about an output axis perpendicular to the first axis. A gear assembly including a spur gear is positioned within the work attachment to transfer torque from the prime mover about the first axis to the output drive about the output axis. An impact mechanism is positioned within the work attachment and includes a hammer and an anvil. The hammer rotates under the influence of the prime mover and is operable to periodically deliver an impact load to the anvil. The output drive rotates about the output axis under the influence of the impact load being transmitted to the output drive by the anvil.

Abstract: Illustrative embodiments of impact tools are disclosed. In at least one illustrative embodiment, an impact tool comprises a motor including an output shaft configured to rotate about a first axis and a drive train configured to be driven by the output shaft of the motor and to drive rotation of an output drive about a second axis that is non-parallel to the first axis, wherein the drive train includes an impact mechanism comprising a hammer configured to rotate about a third axis to periodically deliver an impact load to an anvil, the third axis being parallel to and spaced apart from the second axis.

Abstract: Illustrative embodiments of positive displacement pumps utilizing pressure compensating calibration, as well as related systems and methods, are disclosed. In one illustrative embodiment, a method of operating a positive displacement pump includes sensing, with a pressure sensor disposed at a fluid outlet of the positive displacement pump, a back pressure at the fluid outlet, transmitting a pressure signal associated with the sensed back pressure from the pressure sensor to a controller of the positive displacement pump, and identifying, on the controller, a volume of fluid pumped by the positive displacement pump using the pressure signal.