Patents by Inventor Surender K. Makhija
Surender K. Makhija 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: 7078879Abstract: A battery tester and charger is provided for safely and efficiently testing and charging partially charged and discharged batteries. Information about the battery to be tested is inputed by the user. A first heavy loaded is applied and the bounce back voltage is used to determine the state of charge of the battery. If the battery is chargeable then a set charge time is determined. If not, then the battery can be discarded.Type: GrantFiled: March 26, 2002Date of Patent: July 18, 2006Assignee: SPX CorporationInventor: Surender K. Makhija
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Publication number: 20030184262Abstract: A battery tester/charger is provided for safely and efficiently testing and charging both partially charged and discharged batteries.Type: ApplicationFiled: March 26, 2002Publication date: October 2, 2003Inventor: Surender K. Makhija
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Patent number: 6629054Abstract: A system comprised of a computer that contains a display device such as monitor, an input device (e.g. a keyboard or a touch screen), a storage device such as a hard-drive, and software capable of collecting data. The data is collected from an adapter of which one end is attached to the computer and the other one end and attached to an automotive part. The automotive part is tested and performance data extracted. The data is sent to a remote location or to the computer where it is compiled for a wire variety of uses.Type: GrantFiled: November 2, 2001Date of Patent: September 30, 2003Assignee: SPX CorporationInventors: Surender K. Makhija, Steven J. Sparacino, Thomas L. Webster
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Patent number: 6396278Abstract: A hand-held ignition voltage tester for detecting voltage on a spark plug wire in an ignition system, such as a distributorless ignition system. The tester includes a housing, positive and negative power cables and a capacitive probe for capacitively coupling to the spark plug wire. The capacitive probe generates a voltage signal which is representative of the voltage on the spark plug wire. A plurality of voltage level indicators are mounted to the housing to form a bar graph, with each indicator corresponding to a selected voltage level. A measurement circuit is coupled to the power cables and the capacitive probe for activating the voltage level indicators in response to the voltage signal.Type: GrantFiled: September 10, 1998Date of Patent: May 28, 2002Inventor: Surender K. Makhija
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Publication number: 20020050163Abstract: A system comprised of a computer that contains a display device such as monitor, an input device (e.g. a keyboard or a touch screen), a storage device such as a hard-drive, and software capable of collecting data. The data is collected from an adapter of which one end is attached to the computer and the other one end and attached to an automotive part. The automotive part is tested and performance data extracted. The data is sent to a remote location or to the computer where it is compiled for a wire variety of uses.Type: ApplicationFiled: November 2, 2001Publication date: May 2, 2002Applicant: SPX CorporationInventors: Surender K. Makhija, Steven J. Sparacino, Thomas L. Webster
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Patent number: 6037778Abstract: An electronic battery testing device and a method for testing batteries are provided. Device applies a small first fixed load and measures the voltage at the end of the first fixed load and then applies a medium second fixed load and measures the voltage at the end of the second fixed load. The device then analyzes the condition of the battery based on these voltage values. A method is also provided involving: (a) applying a first small fixed load to a battery, (b) measuring the voltage at the end of the first small fixed load, (c) applying a second medium fixed load to the battery, (d) measuring the voltage of the battery at the end of the second medium fixed load, and (e) analyzing the condition of the battery based on the voltage values. Preferably the method also involves evaluating the recovery voltage wave form after the second medium load.Type: GrantFiled: November 5, 1997Date of Patent: March 14, 2000Assignee: STAT Engineering Company, L.L.C.Inventor: Surender K Makhija
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Patent number: 5834939Abstract: A hand-held ignition voltage tester for detecting voltage on a spark plug wire in an ignition system, such as a distributorless ignition system. The tester includes a housing, positive and negative power cables and a capacitive probe for capacitively coupling to the spark plug wire. The capacitive probe generates a voltage signal which is representative of the voltage on the spark plug wire. A plurality of voltage level indicators are mounted to the housing to form a bar graph, with each indicator corresponding to a selected voltage level. A measurement circuit is coupled to the power cables and the capacitive probe for activating the voltage level indicators in response to the voltage signal.Type: GrantFiled: October 7, 1996Date of Patent: November 10, 1998Inventor: Surender K. Makhija
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Patent number: 5629680Abstract: A vehicle current drain tester tests nominal current drain through a vehicle electrical system while preserving on-board vehicle memory. The tester includes a measurement current loop, an offset circuit and a fail indicator. The current loop includes first and second tester terminals for connection to the electrical circuit, first and second voltage source terminals for connection to a voltage source and a current sensor. The current sensor generates a measurement signal in response to current flowing in the current loop. The offset circuit is coupled to the current sensor and applies an offset to the measurement signal which represents a selected drain current level in the vehicle. The offset circuit generates a fail output signal as a function of whether the measurement signal exceeds the offset. The fail indicator is coupled to the offset circuit and is responsive to the fail output signal.Type: GrantFiled: February 2, 1996Date of Patent: May 13, 1997Inventor: Surender K. Makhija
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Patent number: 5160892Abstract: An engine analyzer for an internal combustion engine includes an analog-to-digital (A/D) converter which digitizes an analog input waveform representing, for example, a secondary or primary voltage waveform of the ignition coil of the internal combustion engine. The sampling rate of the analog digital converter is determined by dividing the waveform time period by the desired number of samples. An adjustment factor C is used to provide a buffer period during the sampling period of the waveform. A display for displaying the waveform has a buffer region which corresponds to the buffer period. Thus, a variation in the speed of the engine which causes the engine to slow down and extends the period of the engine waveform does not cause a loss of data collected from the waveform because the buffer period provides a margin of error.Type: GrantFiled: October 5, 1990Date of Patent: November 3, 1992Assignee: Bear Automotive Service Equipment CompanyInventors: Surender K. Makhija, Steven J. Sparacino, Robert T. Burgess
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Patent number: 5004979Abstract: A signal representing the RPM of an internal combustion engine is produced by a signal processor connected to the battery of the vehicle. The signal processor derives an electrical signal from the battery which contains signal components produced by operation of the vehicle ignition system, as well as components from a multitude of other sources such as the voltage regulator, fans, air conditioning and other electrical systems of the vehicle. The signal processor filters and signal processes the signal derived from the vehicle battery to produce a signal having a frequency which is related to the RPM of the engine.Type: GrantFiled: March 16, 1990Date of Patent: April 2, 1991Assignee: Bear Automotive Service Equipment CompanyInventors: Joseph A. Marino, Surender K. Makhija, Majid Taghikhani, Peter A. Puetz
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Patent number: 4490799Abstract: An ignition analyzer apparatus tests the condition of the ignition coil of an internal combustion engine. A gating pulse is supplied to a test circuit immediately before the points are to open for a selected cylinder which causes the test circuit to provide a low resistance in parallel with the points when the points open. This allows a reduced primary current to flow through the ignition coil and prevents the production of a voltage pulse large enough to fire the spark plug for the selected cylinder. While the points are open and the test circuit is providing a low resistance path, the primary current flowing through the coil is measured. The gating pulse ends approximately half-way between the "points open" time of the selected cylinder and the "points open" time of the next cylinder so that the rotor of the distributor is between distributor terminals.Type: GrantFiled: December 4, 1981Date of Patent: December 25, 1984Assignee: Bear Automotive Service Equipment CompanyInventors: Joseph A. Marino, Michael J. Kling, Sydney J. Roth, Surender K. Makhija