Patent ID: 7989969
Filing Date: 2011-08-02
Classification: F02B,F02N,H02J

Abstract:
1. An electro-mechanical device comprising: an internal combustion engine supported on a manually movable frame; a battery receptacle associated with the manually movable frame, the battery receptacle having two opposite lateral sides and comprising a receptacle terminal block coupled to the internal combustion engine via a coupling mechanism, the receptacle terminal block being located adjacent a distal end of a tower receptacle and comprising a positive receptacle contact associated with a first side of the tower receptacle corresponding to one of the two opposite lateral sides and a negative receptacle contact associated with a second side of the tower receptacle corresponding to the other of the two opposite lateral sides; the battery receptacle further comprising a receptacle latch projection associated with each of the two opposite lateral sides of the battery receptacle; a battery pack for a cordless power tool having a battery terminal block associated with a distal end of a battery tower, the battery terminal block comprising a positive battery contact located and configured to make electrical contact with the positive receptacle contact, and a negative battery contact located and configured to make contact with the negative receptacle contact when the battery pack is inserted into the battery receptacle; the battery pack further comprising a battery latch projection associated with a manually actuatable latch and the battery latch projection being located and configured to cooperate with the receptacle latch projection to latch the battery pack to the battery receptacle when the battery pack is inserted into the battery receptacle; a latch key in the form of at least one projection extending from and generally perpendicular to the battery latch projection, and the receptacle latch projection being configured to accept the at least one projection; wherein the coupling mechanism is one of: a starting circuit electrically coupling the positive and negative contacts to a starting device during a starting operation, the starting device being coupled to the internal combustion engine and being configured to start the internal combustion engine using electrical power provided by the cordless power tool battery pack during the starting operation; a charging circuit electrically coupling the positive and negative contacts to a charging device during a charging operation, the charging device being coupled to the internal combustion engine and being configured to charge the cordless power tool battery pack during the charging operation; or both; the receptacle terminal block further comprises a temperature receptacle contact associated with a front side of the tower receptacle located between the first and second sides, and the battery pack further comprises a temperature battery contact located and configured to make electrical contact with the temperature receptacle contact; and wherein the temperature receptacle contact is electrically coupled to the charging circuit; and the battery pack further comprises a raised platform connected to a lower platform of the battery pack by an intermediate wall, and a pair of chemistry sensor battery contacts associated with a front side of the intermediate wall, and wherein the battery receptacle further comprises a cooperating chemistry sensor receptacle contact located and configured to make electrical contact with the each of the pair of chemistry sensor battery contacts, and wherein each chemistry sensor receptacle contact is electrically coupled to the charging circuit.