POLISHING PAD FOR A RELEASABLE ATTACHMENT TO A BOTTOM SURFACE OF A PLATE-LIKE BACKING PAD OF A POWER TOOL, BACKING PAD AND HAND-HELD POWER TOOL

• US 20190001459A1
• Filed: 06/15/2018
• Published: 01/03/2019
• Est. Priority Date: 06/29/2017
• Status: Abandoned Application

• Current Assignee: Guido Valentini
• Original Assignee: Guido Valentini
• Inventors: VALENTINI, Guido
• Application Number:
  US16/009,469
• Publication Number:
  US 20190001459A1
• Time in Patent Office: Days
• CPC Class Codes: B24B 23/022 Spindle-locking devices, e.g. for mounting or removing the tool
• CPC Class Codes: B24B 23/028 Angle tools
• CPC Class Codes: B24B 23/04 with oscillating grinding tools; Accessories therefor
• CPC Class Codes: B24D 13/147 comprising assemblies of felted or spongy material; comprising pads surrounded by a flexible material
• CPC Class Codes: B24D 13/20 Mountings for the wheels

Abstract

The invention refers to a hand-held power tool (1) comprising a plate-like backing pad (9) with a bottom surface (9a) and a polishing pad (11) with a top surface (11a) for releasable attachment of the polishing pad (11) to the bottom surface (9a) of the backing pad (9). The power tool (1) further comprises an electric or pneumatic motor adapted for actuating the backing pad (9), in order to make the backing pad (9) together with the polishing pad (11) attached thereto perform a purely rotating, a random orbital or a roto-orbital working movement. In order to provide for an easy and fast positioning of the polishing pad (11) in respect to the backing pad (9) it is suggested that the bottom surface (9a) of the plate-like backing pad (9) comprises at least one protrusion (13a; 13b; 13c; 13d) protruding from the bottom surface (9a) of the backing pad (9) and the top surface (11a) of the polishing pad (11) comprises at least one corresponding recess (12a; 12b; 12c; 12d), wherein the at least one protrusion (13a; 13b; 13c; 13d) is received by the at least one recess (12a; 12b; 12c; 12d) when the polishing pad (11) is attached to the backing pad (9).

Claims

1. Polishing pad (11) comprising a top surface (11a) adapted for releasable attachment of the polishing pad (11) to a bottom surface (9a) of a plate-like backing pad (9) of a hand-held power tool (1) and a bottom surface (11b) adapted for polishing a surface of a workpiece, the backing pad (9) being actuated by an electric or pneumatic motor of the hand-held power tool (1) in order to make the backing pad (9) together with the polishing pad (11) attached thereto perform a purely rotating, a random orbital or a roto-orbital working movement, characterized in that the top surface (11a) of the polishing pad (11) comprises at least one recess (12a;

12b;

12c;

12d) adapted for receiving at least one corresponding protrusion (13a;

13b;

13c;

13d) located at and protruding from the bottom surface (9a) of the plate-like backing pad (9) when the polishing pad (11) is attached to the backing pad (9).

2. Polishing pad (11) according to claim 1, wherein the at least one recess comprises an annular groove (12a) extending in the top surface (11a) of the polishing pad (11) in an equidistant manner in respect to a rotational axis (14) of the polishing pad (11).

3. Polishing pad (11) according to claim 1, wherein the at least one recess comprises an annular recess (12d) located along an outer circumference of the top surface (11a) of the polishing pad (11) in an equidistant manner in respect to a rotational axis (14) of the polishing pad (11).

4. Polishing pad (11) according to claim 1, wherein the at least one recess comprises a plurality of separate recesses (12a;

12b;

12c;

12d) located in the top surface (11a) of the polishing pad (11) in an equidistant manner to a rotational axis (14) of the polishing pad (11).

5. Polishing pad (11) according to claim 1, wherein the at least one recess comprises a plurality of separate recesses (12a;

12b;

12c;

12d) located in the top surface (11a) of the polishing pad (11) with different distances to a rotational axis (14) of the polishing pad (11).

6. Polishing pad (11) according to claim 4, wherein the separate recesses (12a;

12b;

12c;

12d) are located in the top surface (11a) of the polishing pad (11) with different circumferential distances in respect to one another.

7. Plate-like backing pad (9) of a hand-held power tool (1), the backing pad (9) comprising a bottom surface (9a) adapted for releasably attaching a top surface (11a) of a polishing pad (11), the backing pad (9) being actuated by an electric or pneumatic motor of the hand-held power tool (1) in order to make the backing pad (9) together with the polishing pad (11) attached thereto perform a purely rotating, a random orbital or a roto-orbital working movement, characterized in that the bottom surface (9a) of the plate-like backing pad (9) comprises at least one protrusion (13a;

13b;

13c;

13d) protruding from the bottom surface (9a) of the backing pad (9) and adapted for entering into a corresponding recess (12a;

12b;

12c;

12d) located in the top surface (8a) of the polishing pad (11) when the polishing pad (11) is attached to the backing pad (9).

8. Backing pad (9) according to claim 7, wherein the at least one protrusion comprises an annular collar (13a;

13d) protruding from the bottom surface (9a) of the backing pad (9) and extending in an equidistant manner in respect to a rotational axis (10) of the backing pad (9).

9. Backing pad (9) according to claim 8, wherein the annular collar (13a;

13d) extends along the outer circumference of the backing pad (9).

10. Backing pad (9) according to claim 8, wherein the annular collar (13a;

13d) extends in an equidistant manner in respect to the outer circumference of the backing pad (9).

11. Backing pad (9) according to claim 7, wherein the at least one protrusion comprises a plurality of separate protrusions (13a;

13b;

13c;

13d) each protruding from the bottom surface (9a) of the backing pad (9) and located there in an equidistant manner to a rotational axis (10) of the backing pad (9).

12. Backing pad (9) according to claim 7, wherein the at least one protrusion (14) comprises a plurality of separate protrusions (13a;

13b;

13c;

13d) each protruding from the bottom surface (9a) of the backing pad (9) and located there with different distances to a rotational axis (10) of the backing pad (9).

13. Backing pad (9) according to claim 11, wherein the separate protrusions (13a;

13b;

13c;

13d) are located on the bottom surface (7a) of the backing pad (7) with different circumferential distances in respect to one another.

15. Power tool (1) according to claim 14, wherein the plate-like backing pad (9) is designed according to one of the claims 7 to 13.

14. Hand-held power tool (1) comprising a plate-like backing pad (9) with a bottom surface (9a) and a polishing pad (11) with a top surface (11a), the bottom surface (9a) and the top surface (11a) adapted for releasable attachment of the polishing pad (11) to the backing pad (9), and further comprising an electric or pneumatic motor adapted for actuating the backing pad (9), in order to make the backing pad (9) together with the polishing pad (11) attached thereto perform a purely rotating, a random orbital or a roto-orbital working movement, characterized in that the bottom surface (9a) of the plate-like backing pad (9) comprises at least one protrusion (13a;

13b;

13c;

13d) protruding from the bottom surface (9a) of the backing pad (9) and the top surface (11a) of the polishing pad (11) comprises at least one corresponding recess (12a;

12b;

12c;

12d), wherein the at least one protrusion (13a;

13b;

13c;

13d) is received by the at least one recess (12a;

12b;

12c;

12d) when the polishing pad (11) is attached to the plate-like backing pad (9).

16. Power tool (1) according to claim 14 or 15, wherein the polishing pad (11) is designed according to one of the claims 2 to 6.