HAND DRILL ALIGNMENT DEVICES AND METHODS OF MAKING AND USING THE SAME

• US 3,664,754 A
• Filed: 11/03/1969
• Issued: 05/23/1972
• Est. Priority Date: 11/03/1969
• Status: Expired due to Term

• Current Assignee: Robert L. Giard
• Original Assignee: Kelbel Donald
• Inventors: KELBEL DONALD
• Application Number:
  US04/873,374
• Time in Patent Office: 932 Days
• US Class Current: 408/16
• CPC Class Codes: B25H 1/0085 by means of levels
• CPC Class Codes: G01C 9/24 in closed containers partially filled with liquid so as to leave a gas bubble
• CPC Class Codes: Y10T 408/21 with signal, indicator, illuminator or optical means
• CPC Class Codes: Y10T 408/91 Machine frame
• CPC Class Codes: Y10T 408/96 Miscellaneous

Abstract

THE PRESENT INVENTION RELATES TO BUBBLE TYPE ALIGNMENT DEVICES FOR USE IN UPON AND WITH HAND DRILLS COMPRISING BUBBLE TYPE LEVEL CHAMBERS APPROPRIATELY SHAPED AND OPERABLY MOUNTED TO A CONVENTIONAL HAND DRILL ALLOWING A FIRST SUCH LEVEL WHICH IS ALIGNED PARALLEL TO THE DRILL BIT AND A SECOND SUCH LEVEL WHICH IS ALIGNATED PERPENDICULAR TO THE FIRST.

Claims