Multipurpose hand tool

• US 3,907,257 A
• Filed: 08/15/1974
• Issued: 09/23/1975
• Est. Priority Date: 08/15/1974
• Status: Expired due to Term

• Current Assignee: Edward R. Drzewiecki
• Original Assignee: Edward R. Drzewiecki
• Inventors: Drzewiecki, Edward R.
• Primary Examiner(s): Smith, Al Lawrence
• Assistant Examiner(s): Watson, Robert C.
• Application Number:
  US05/497,591
• Time in Patent Office: 404 Days
• Field of Search: 51/17R,17PT,17J,26P,266,356 15/23,230.1
• US Class Current: 451/358
• CPC Class Codes: B24B 23/02 with rotating grinding tools; Accessories therefor
• CPC Class Codes: B24B 41/04 Headstocks; Working-spindles; Features relating thereto
• CPC Class Codes: B24B 55/02 Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant cooling or lubricating during dressing operation B24B53/095; incorporated in grinding wheels B24D

Abstract

A hand-held multipurpose tool includes an elongated handle fixed to and axially-aligned with a frame, about which is rotatably mounted a tubular housing having finishing means thereon for finishing a surface. A motor is mounted on the frame within the housing for rotating axially the housing relative to the frame. The motor has an output shaft drivingly connected to the housing and to a tool attaching member disposed at the outside of the front end portion of the housing, the member being adapted to receive and drive an auxiliary tool, such as a drill bit. The finishing means on the housing may be used for sanding or buffing the surface, and radial openings are provided in the tubular housing to permit air to be drawn past and into contact with the motor for cooling purposes by a fan blade and to enable the air to be driven through the openings and radially outwardly through the porous finishing means to remove continuously sanding or buffing residue.

Claims

1. A tool adapted to finish a surface and adapted to be used alternatively for driving an auxiliary tool means, comprising:

a single elongated rearwardly-extending handle adapted to be grasped by a hand of the user to support completely the tool and having front and rear end portions;

frame means fixed to and axially-aligned with said front end portion of said handle;

a tubular housing surrounding and axially aligned with said frame, said housing having tool means on the outer surface thereof for finishing the surface;

means for mounting rotatably said housing on said frame means to rotate axially relative thereto;

driving means mounted on said frame means substantially within said tubular housing for rotating axially said housing relative to said frame means, said driving means having a forwardlyextending output shaft;

means for connecting drivingly an intermediate portion of said output shaft to said housing means; and

a free distal end portion of said shaft extending forwardly for receiving directly and for driving directly the auxiliary tool means.

2. A tool according to claim 1, further including attaching means disposed forwardly of and beyond said frame means for connecting said distal end portion and the auxiliary tool means.

3. A tool according to claim 2, further including means defining a plurality of radial openings extending through said tubular housing and said tool means, fan means drivingly coupled to said output shaft for blowing air radially outwardly through said openings, said means thereon for finishing being porous to permit the air to pass therethrough.

4. A tool according to claim 3, further including a closure member at the rear end portion of said housing, said closure member having means defining a plurality of holes extending therethrough to permit air to be drawn through said holes past and into contact with said driving means for cooling it and from said driving means out said openings.

5. A tool according to claim 4, further including means for mounting said drive means within said housing intermediate said ends in the path of travel of air moving forwardly from said holes.

6. A tool according to claim 4, further including guiding means fixed to said frame means for directing air from said driving means radially outwardly to said openings.

7. A tool according to claim 6, wherein said handle is tubular in shape and has an axial opening extending throughout the length of said handle, said driving means including an electric motor having a power supply cord extending therefrom through said handle, further including reduction gears interposed between sAid output shaft and said housing and said attaching means disposed outside of said tubular housing.

8. A tool according to claim 3, further including guiding means fixed to said frame means for directing air from said driving means radially outwardly to said openings.

9. A tool according to claim 3, further including a plurality of unidirection scooping means for enabling air to enter said openings from said fan means.

10. A tool according to claim 9, wherein said scooping means includes a plurality of inwardly-extending struck-out tab portions.