(12) United States Patent US008607405B2 (10) Patent N0.: US 8,607,405 B2 Reed et a]. (45) Date of Patent: Dec. 17, 2013 (54) BATTERY POWERED CORDLESS
US. Patent Dec. 17, 2013 Sheet 8 or 22 FIG. I] 200 205 FORCEAPPLIED /\/ TO LEVER I 210 LEVER PIVOTS /\/ ABOUT CONNECTION POINT I 215 LEVER ENGAGES /\/
US. Patent Dec. 17, 2013 Sheet 9 0f 22 US 8,607,405 B2
US. Patent Dec. 17, 2013 Sheet 11 0122 US 8,607,405 B2 msvw MOPOE MMTIOMCL ZOO mar/ma Q? www www mew v62 2w swm a; 1| 1| _ _ _ _ _ _ _ " 8w _ _ _
US. Patent Dec. 17, 2013 Sheet 12 0f 22 US 8,607,405 B2 mwm mIDQOE 523w MERE _1 _ _ w _ _ _ ~ _ _ _ _ _ _ _ ~ _ _ _ _ _ _ M 2m _ _ _ _ _ _ _ _ _ _ _ _
US. Patent Dec. 17, 2013 Sheet 13 0f 22 US 8,607,405 B2 605 FIG. J7 _ / 'A/ 000 ENTER SLEEP MODE ‘ v ’ ‘ 610 TL RN OFF DISCHARGE /\/ CONTROL MODU
US. Patent Sheet 14 0f 22 Dec. 17, 2013 ENTER WAKE MODE 600 DEVICE POWER SWITCII ON? YES 665 i / ENTER NORMAL DISCHARGE MODE V 6 70 ACTIVATE /\/ DISCH
US. Patent Dec. 17, 2013 Sheet 15 0f 22 US 8,607,405 B2 SW 3% S w. @300 cm a; 94% mm vi a 2 6E
US. Patent Dec. 17, 2013 Sheet 16 0f 22 US 8,607,405 B2 3% a; ma 3% 2% awn
US. Patent Dec. 17, 2013 Sheet 17 0f 22 US 8,607,405 B2 3 m wm.
US 8,607,405 B2 Page 2 (56) References Cited U.S. PATENT DOCUMENTS 5,004,276 A 4/1991 Hanley 5,014,388 A * 5/1991 SchiaZZaet al. ... .. 15/
US. Patent Dec. 17, 2013 Sheet 18 0f 22 US 8,607,405 B2 FIG. 26
US. Patent Dec. 17, 2013 Sheet 1 0f 22 US 8,607,405 B2
US. Patent Dec. 17, 2013 Sheet 2 0f 22 US 8,607,405 B2 FIG. 2
US. Patent Dec. 17, 2013 Sheet 3 0f 22 US 8,607,405 B2 FIG. 3 5 135
US. Patent Dec. 17, 2013 Sheet 4 0f 22 US 8,607,405 B2 FIG. 4 50
US. Patent Dec. 17, 2013 Sheet 5 0f 22 US 8,607,405 B2 FIG. 5 FIG. 6 1 05
US. Patent Dec. 17, 2013 Sheet 6 0f 22 US 8,607,405 B2 FIG. 8 FIG. 7
US. Patent Dec. 17, 2013 Sheet 7 0f 22 US 8,607,405 B2 2 .UNK
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