Tchavdar V Tchakarov

8192255, Jun 5, 2012

Feb 11, 2010

12/704434

Eric Gallup - Rochester MI, US
Tchavdar V. Tchakarov - Monroe MI, US

B24B 21/18

451442, 451353, 451359, 451548, 403263, 125 22

A tool holder for a grinding machine, where the tool holder is mounted to a grinding platform of the grinding machine. The tool holder includes a plate member having a tapered slot where opposing stop elements are provided within the slot at a central location. The tool includes a pair of circular elements that are positioned on either side of the stop elements in the slot and are forced into the tapered shape of the slot so that the tool is held to the tool holder.

20110300784, Dec 8, 2011

Jun 4, 2010

12/794297

Tchavdar V. Tchakarov - Monroe MI, US
Eric Gallup - Rochester MI, US

B24B 7/18
B24B 7/00

451259

A disk assembly for use with floor grinding and/or polishing machines. The disk assembly includes multiple cutting heads attached to a flexible rubber disk, and a layer of hook and loop type fastener material for attaching the disk assembly to the drive plate of the floor grinding and/or polishing machine. The disk assembly also includes a foam pad for attachment between the flexible polishing disk and the drive plate to provide additional support structure, and a rigid plate which can optionally be used between the flexible polishing disk and the foam pad to maintain a flat polishing surface.

55819265, Dec 10, 1996

Sep 16, 1994

8/308094

Abdul Taalib-din - Detroit MI
Tchavdar Tchakarov - Monroe MI
Ronald Wiand - Troy MI
Valentin Dimchev - Sofia, BG

Sentinel Arms, B.G. - Madison Heights MI

F41A 372

42 16

A manually actuated rifle which maintains the aesthetics of a semi-automatic rifle, but which is incapable of semi-automatic or automatic fire. A piston guide member is provided which has at least one aperture therein for preventing actuation of the action by gas pressure.

20210205942, Jul 8, 2021

Mar 24, 2021

17/210984

- Huskvarna, SE
Tchavdar V. Tchakarov - Monroe MI, US

B24B 7/18
B24D 13/14
B24D 7/08
B24D 11/00
B24D 18/00
B24B 41/047
A47L 11/164
A47L 11/40
B24B 7/22
B24D 7/06

A floor polishing or grinding pad assembly is provided. In one aspect, a polishing or grinding pad assembly employs a fibrous pad, a reinforcement layer or ring, and multiple floor-contacting disks. In another aspect, the reinforcement layer includes a central hole through which the fibrous pad is accessible and the fibrous pad at the hole has a linear dimension greater than a linear dimension of one side of the adjacent reinforcement layer. In yet another aspect, at least one of the floor-contacting disks has an angle offset from that of a base surface of the disk, the fibrous pad and/or the reinforcement layer. A further aspect employs a smaller set of disks alternating between and/or offset from a larger set of the disks. In another aspect, the reinforcement layer includes a wavy or undulating internal edge shape.

20200121154, Apr 23, 2020

Dec 18, 2019

16/718641

- Huskvarna, SE
Tchavdar V. Tchakarov - Monroe MI, US

A47L 11/40
B24D 7/06
B24B 41/047
B24B 7/22
A47L 11/164
B24D 18/00
B24D 11/00
B24D 7/08
B24B 7/18
B24D 13/14

A floor polishing or grinding pad assembly is provided. In one aspect, a polishing or grinding pad assembly employs a fibrous pad, a reinforcement layer or ring, and multiple floor-contacting disks. In another aspect, the reinforcement layer includes a central hole through which the fibrous pad is accessible and the fibrous pad at the hole has a linear dimension greater than a linear dimension of one side of the adjacent reinforcement layer. In yet another aspect, at least one of the floor-contacting disks has an angle offset from that of a base surface of the disk, the fibrous pad and/or the reinforcement layer. A further aspect employs a smaller set of disks alternating between and/or offset from a larger set of the disks. In another aspect, the reinforcement layer includes a wavy or undulating internal edge shape.

20190210192, Jul 11, 2019

Jan 11, 2018

15/867908

- Monroe MI, US
Tchavdar V. Tchakarov - Monroe MI, US

Diamond Tool Supply, Inc. - Monroe MI

B24D 7/14
B24D 13/14
B24D 18/00

A polishing or grinding pad with a multilayer reinforcement is provided. In one aspect, a floor polishing or grinding pad assembly employs a flexible pad, at least two reinforcement layers or rings with different characteristics, and multiple floor-contacting tools such as abrasive disks. In another aspect, a workpiece polishing or grinding pad assembly includes a flexible and rotatable pad, a polymeric reinforcement layer coupled to the pad and a metallic reinforcement layer to which are coupled abrasive tools. In yet another aspect, a floor-facing reinforcement is more flexible than a pad-facing reinforcement which is more rigid.

20190174988, Jun 13, 2019

Feb 13, 2019

16/274624

- Charlotte NC, US
Tchavdar V. Tchakarov - Monroe MI, US

Husqvarna Construction Products North America, Inc. - Charlotte NC

A47L 11/40
B24B 7/18
B24D 7/06
B24B 41/047
B24B 7/22
A47L 11/164
B24D 13/14
B24D 18/00
B24D 11/00
B24D 7/08

A floor polishing or grinding pad assembly is provided. In one aspect, a polishing or grinding pad assembly employs a fibrous pad, a reinforcement layer or ring, and multiple floor-contacting disks. In another aspect, the reinforcement layer includes a central hole through which the fibrous pad is accessible and the fibrous pad at the hole has a linear dimension greater than a linear dimension of one side of the adjacent reinforcement layer. In yet another aspect, at least one of the floor-contacting disks has an angle offset from that of a base surface of the disk, the fibrous pad and/or the reinforcement layer. A further aspect employs a smaller set of disks alternating between and/or offset from a larger set of the disks. In another aspect, the reinforcement layer includes a wavy or undulating internal edge shape.

20180206690, Jul 26, 2018

Mar 21, 2018

15/927560

- Monroe MI, US
TCHAVDAR V. TCHAKAROV - Monroe MI, US

Diamond Tool Supply, Inc. - Monroe MI

A47L 11/40
B24B 41/047
B24B 7/22
A47L 11/164
B24D 7/06

A floor polishing or grinding pad assembly is provided. In one aspect, a polishing or grinding pad assembly employs a fibrous pad, a reinforcement layer or ring, and multiple floor-contacting disks. In another aspect, the reinforcement layer includes a central hole through which the fibrous pad is accessible and the fibrous pad at the hole has a linear dimension (x) greater than a linear dimension (y) of one side of the adjacent reinforcement layer. In yet another aspect, at least one of the floor-contacting disks has an angle (α) offset from that of a base surface of the disk, the fibrous pad and/or the reinforcement layer. A further aspect employs a smaller set of disks alternating between and/or offset from a larger set of the disks. In another aspect, the reinforcement layer includes a wavy or undulating internal edge shape.