The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 11, 1989
Filed:
Feb. 26, 1988
Friedrich J Katz, Severna Park, MD (US);
Salvatore R Abbratozzato, Timonium, MD (US);
Black & Decker Inc., Newark, DE (US);
Abstract
A cordless power-operated device, such as a saw 20, is powered by a low level D.C. voltage provided by battery pack cells to operate the saw in a cordless mode. The cells are housed in a container 32 which fits into a cavity 23 formed in a housing 22 of saw 20. Another container 66 includes a first section 64 which is shaped externally in the same configuration as container 32. First section 64 houses a voltage converter 62 which converts conventional A.C. voltage, such as 120 volts at 60 Hz, to the low level D.C. voltage required to operate saw 20. Container 66 can be inserted into cavity 23 of saw 20 and voltage converter 62 can be connected to a conventional A.C. source to operate the saw in a corded mode. Container 66 also includes a second section 68 which houses a cooling motor 70. Cooling motor 70 provides powered cooling of saw motor 28, the cooling motor and voltage converter 62.