Mechanical toothbrush

• US 3,159,859 A
• Filed: 04/16/1962
• Issued: 12/08/1964
• Est. Priority Date: 04/16/1962
• Status: Expired due to Term

• Current Assignee: Frank H. Rasmussen
• Original Assignee: Frank H. Rasmussen
• Inventors: Rasmussen, Frank H.
• Application Number:
  US04/187,531
• Time in Patent Office: 967 Days
• US Class Current: 15/22.1
• CPC Class Codes: A61C 17/40 orbiting, e.g. nutating
• CPC Class Codes: Y10T 74/18232 Crank and lever

Claims

1. A MECHANICAL TOOTHBRUSH COMPRISING (A) A HOUSING (B) A BRUSH HANDLE HAVING INNER AND OUTER ENDS THEREON AND EXTENDING OUTWARDLY FROM SAID HOUSING AND HAVING A BRUSH ON THE OUTER END THEREOF, (C) ECCENTRIC DRIVE MEANS WITHIN SAID HOUSING CONNECTED TO THE INNER END OF SAID HANDLE AND OPERABLE TO IMPART A RECIPROCATING MOTION OT SAID BRUSH, AND (D) MEANS INTERMEDIATE THE ENDS OF SAID HANDLE AND INCLUDING A PIN AND A SUBSTANTIALLY S-SHAPED SLOT CONNECTION BETWEEN SAID HOUSING AND BRUSH HANDLE TO MODIFY THE RECIPROCATING MOTION IMPARTED BY SAID DRIVE MEANS, SAID SLOT EXTENDING GENERALLY LONGITUDINALLY OF SAID HANDLE, THEREBY TO GENERATE A COMBINATION ROTARY AND RECIPROCATING PATH OF MOVEMENT FOR SAID BRUSH, WHEREBY, WHEN THE HANDLE IS POSITIONED VERTICALLY WITH THE WORK CONTACTING PORTION OF THE BRUSH AGAINST THE USER'"'"''"'"'S TEETH, THE BRUSH WILL MOVE FROM THE USER'"'"''"'"'S GUM TOWARD THE BITING EDGE OF THE TEETH, THEN AWAY THEREFROM OUT OF CONTACT THEREWITH AND BACK TO THE GUM.