# US 2025/0367809 A1 · Battery-powered chainsaw or battery-powered angle grinder and handheld battery-powered work apparatus

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- Number: US 2025/0367809 A1
- Document ID: US20250367809A1
- Status: Published application
- Kind: A1
- Application number: 19/227,176
- Filed: 2025-06-03
- Published: 2025-12-04
- Earliest claimed: 2024-06-03
- Assignees: Andreas Stihl AG & Co. KG
- Applicants: Andreas Stihl AG & Co. KG
- Inventors: Marcel Förster; Roland Mandel; Martin Failenschmid
- Web page: https://patentgrep.com/patent/US20250367809A1

## CPC

- B25F 5/02: Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)}
- B24B 23/028: {Angle tools}
- B27B 17/00: Chain saws; Equipment therefor {(slotting or mortising machines equipped with chain cutters B27F5/06)}
- B27B 17/0008: {Means for carrying the chain saw, e.g. handles (B27B17/0033 takes precedence)}
- B27B 17/08: Drives or gearings; Devices for swivelling or tilting the chain saw
- B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)}
- B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B27B: SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR (saws specially adapted for pruning or debranching A01G3/08; sawing apparatus specially adapted for felling trees A01G23/091; features not restricted to a particular type of wood saw B23D, e.g. attaching saw blades B23D51/00; machine tool frames, beds, pillars or like members, in general B23Q1/01)

## Abstract

A battery-powered chainsaw or angle grinder includes a housing, a motor, a tool drivable by the motor within a movement plane, a rear handle, and two battery receptacles. The tool is arranged at the front housing end. A lateral direction runs at right angles to the movement plane. The two battery receptacles lie next to each other in the lateral direction and enclose between them a center point. The center point lies, measured in the lateral direction, with a lateral center-point spacing from the movement plane of the tool. The rear handle lies, measured in the lateral direction, with a lateral handle spacing from the movement plane. The lateral handle spacing is greater than the lateral center-point spacing. A notional center axis runs between receptacles and the actuating parts of battery locks are arranged offset with respect to each other in the direction of the center axis.

## Claims

### Claim 1

A battery-powered chainsaw or a battery-powered angle grinder comprising:
a housing having a rear end;
a drive motor;
a work tool configured to be driven by said drive motor within a movement plane;
two battery receptacles, each configured to receive a battery pack for supplying said drive motor with electrical energy;
said work tool being arranged at a front end of said housing;
a rear handle arranged at said rear end of said housing;
the battery-powered chainsaw or battery-powered angle grinder defining a lateral direction running at right angles to said movement plane of said work tool;
said two battery receptacles lying next to each other in said lateral direction and enclosing between them a battery receptacle center point;
said battery receptacle center point lying, measured in said lateral direction, with a lateral center-point spacing from said movement plane of said work tool;
said rear handle lying, measured in said lateral direction, with a lateral handle spacing from said movement plane of said work tool; and,
said lateral handle spacing being greater than said lateral center-point spacing.

### Claim 2 (depends on 1)

The battery-powered chainsaw or battery-powered angle grinder of claim 1, wherein said lateral handle spacing is at least 5% greater than said lateral center-point spacing.

### Claim 3 (depends on 1)

The battery-powered chainsaw or battery-powered angle grinder of claim 1, wherein said lateral handle spacing is at least 10% greater than said lateral center-point spacing.

### Claim 4 (depends on 1)

The battery-powered chainsaw or battery-powered angle grinder of claim 1, wherein the battery-powered chainsaw or the battery-powered angle grinder has a net center of gravity when no battery packs are inserted which lies in said lateral direction with a first lateral center-of-gravity spacing from said movement plane of said work tool; and, said lateral handle spacing is at least 1.25 times said first lateral center-of-gravity spacing.

### Claim 5 (depends on 4)

The battery-powered chainsaw or battery-powered angle grinder of claim 4, wherein said lateral handle spacing is at least 1.5 times said first lateral center-of-gravity spacing.

### Claim 6 (depends on 1)

The battery-powered chainsaw or battery-powered angle grinder of claim 1, wherein the battery-powered chainsaw or the battery-powered angle grinder has a gross center of gravity when the battery packs are inserted which lies in said lateral direction with a second lateral center-of-gravity spacing from said movement plane of said work tool; and, said lateral handle spacing is at least 1.15 times the second lateral center-of-gravity spacing.

### Claim 7 (depends on 6)

The battery-powered chainsaw or battery-powered angle grinder of claim 6, wherein said lateral handle spacing is at least 1.3 times the second lateral center-of-gravity spacing.

### Claim 8 (depends on 1)

The battery-powered chainsaw or battery-powered angle grinder of claim 1 further comprising a front bale handle having a lateral handle section; and, said rear handle lies, measured in said lateral direction, between said battery receptacle center point and said lateral handle section.

### Claim 9 (depends on 1)

The battery-powered chainsaw or battery-powered angle grinder of claim 1, wherein said two battery receptacles include a first battery receptacle and a second battery receptacle and have a notional central plane between said first battery receptacle and said second battery receptacle; said two battery receptacles each have an electrical contact for electrically connecting the corresponding battery pack to the battery-powered chainsaw or the battery-powered angle grinder; and, a first contact spacing of said first electrical contact of said first battery receptacle from the notional central plane and a second contact spacing of said second electrical contact of said second battery receptacle from said notional central plane are not the same.

### Claim 10 (depends on 1)

The battery-powered chainsaw or battery-powered angle grinder of claim 1, wherein said two battery receptacles have a notional central plane between them; the battery packs include a first battery pack having a first HMI element and a second battery pack having a second HMI element; said two battery receptacles are configured such that, in an inserted state of the battery packs, a first element spacing of the first HMI element of the first battery pack from said notional central plane and a second element spacing of a second HMI element of the second battery pack from said notional central plane are not the same.

### Claim 11

A handheld battery-powered work apparatus comprising:
a housing;
a drive motor;
a work tool configured to be driven by said drive motor;
two battery receptacles, each of said two receptacles being configured to receive a battery pack for supplying said drive motor with electrical energy;
two battery locks;
each of said two battery receptacles being associated with one of the two battery locks for locking the corresponding battery pack in a corresponding one of the two battery receptacles;
said two battery receptacles being arranged adjacent to each other;
said two battery locks being positioned between said two battery receptacles;
each of said two battery locks having a locking part and an actuating part;
wherein a notional center axis runs between said two battery receptacles; and,
said actuating parts of said two battery locks are arranged offset with respect to each other in a direction of the notional center axis.

### Claim 12 (depends on 11)

The handheld battery-powered work apparatus of claim 11, wherein said two battery receptacles are arranged opposite each other with respect to the notional center axis.

### Claim 13 (depends on 11)

The handheld battery-powered work apparatus of claim 11, wherein said locking parts are arranged centrally with respect to a corresponding one of said two battery receptacles in a direction of the notional center axis.

### Claim 14 (depends on 11)

The handheld battery-powered work apparatus of claim 11, wherein said actuating parts of said two battery locks are arranged offset with respect to associated ones of said locking parts in the direction of the notional center axis.