1
David A Saar, Richard T Walter: Method of charging batteries and apparatus therefor. Black & Decker, R B Sherer, Harold Weinstein, E D Murphy, July 5, 1983: US04392101 (256 worldwide citation)

A method of fast charging batteries by means of precise analysis of the profile of the variation with time of a characteristic of the battery which is indicative of the variation in stored chemical energy as the battery is charged. The method specifically comprises analyzing the profile for the occu ...


2
David A Saar: Anti-kickback power tool control. Black & Decker, Leonard Bloom, Edward D Murphy, Harold Weinstein, May 19, 1981: US04267914 (161 worldwide citation)

An impending kickback condition is the operation of a power tool or machine tool system is sensed and used to control or eliminate the kickback. The ability to sense an impending kickback condition can be used in all categories of power driven tools. The change in force applied to the power driven t ...


3
Jill L Leukhardt, David A Saar: Anti-kickback power tool control. Black and Decker, Leonard Bloom, Edward D Murphy, Harold Weinstein, February 3, 1981: US04249117 (140 worldwide citation)

An impending kickback condition in the operation of a power tool or machine tool system is sensed and used to control or eliminate the kickback. The ability to sense an impending kickback condition can be used in all categories of power driven tools. The change in force applied to the power driven t ...


4
David A Saar, Richard T Walter, John L Bowman Jr: Apparatus and method for charging batteries. Black & Decker, Ronald B Sherer, Harold Weinstein, June 14, 1983: US04388582 (102 worldwide citation)

A method and apparatus are presented for charging batteries at a high rate without damaging or reducing the life of the battery. The method comprises monitoring the level of energy stored in the battery, preferably by monitoring a particular battery characteristic. The variation of the characteristi ...


5
David A Saar: Digital control system for electric motors in power tools and the like. Black & Decker, Harold Weinstein, Walter Ottesen, Edward D Murphy, December 22, 1981: US04307325 (71 worldwide citation)

A digital control system for electric motors in power tools of the portable or stationary type includes a microcomputer controlled speed regulator connected to the electric motor for maintaining a preselected speed of the motor substantially constant between no load and full load operation of the mo ...


6
Vincent G Yost, David A Saar: Vehicle-detecting unit for use with electronic parking meter. Intelligent Devices, Caesar Rivise Bernstein Cohen & Pokotilow, May 8, 2001: US06229455 (64 worldwide citation)

A vehicle detector unit and detection method for use with an electronic parking meter for providing the electronic parking meter with the ability to reliably detect the presence or absence of a vehicle in any existing corresponding parking space, independent of the surrounding environment, while usi ...


7
Wade W Smith, David A Saar: Air conditioning system. Spencer T Smith, January 11, 2005: US06840052 (53 worldwide citation)

An air conditioning system cools air within an area. An air conditioner controller defines information based on input data from door and window open status sensors and a return air monitor sensing the dry bulb temperature and the wet bulb temperature or relative humidity of the air within the area b ...


8
David A Saar, Robert Bradus: Microcomputer controlled power tool. Black & Decker, Harold Weinstein, Edward D Murphy, Walter Ottesen, February 23, 1982: US04317176 (49 worldwide citation)

A microcomputer controlled power tool including a semiconductor control device connected to the motor, one or more sensors, and a microcomputer interfaced to a keyboard and digital display for monitoring and controlling various operating conditions and parameters of the power tool.


9
Wayne Zavis, David A Saar: Universal electric motor speed sensing by using Fourier transform method. Black & Decker, Ronald Sherer, Harold Weinstein, Edward D Murphy, July 2, 1985: US04527101 (41 worldwide citation)

An indirect speed sensor for an electric motor, such as an electric motor of the universal type, provides for a resistive element in series with the motor windings so that current pertubations that occur as a consequence of armature rotation are manifested as speed-dependent voltage signals across t ...


10
David A Saar, Dwight N Johnson: Flush control. Geberit Technik, Philip M Kolehmainen, Greer Burns & Crain, May 13, 2003: US06560790 (38 worldwide citation)

A high flow valve assembly and a low flow valve assembly are in parallel flow relation between an inlet and an outlet of a flush controller. The valve assemblies are opened by solenoid operated pilot valves under the control of a microprocessor based flush control system. A turbine directly measures ...