Power tool and grommet

Patent metadata

Field	Value
Publication number	US-12459100-B2
Application number	US-202218075473-A
Country	US
Kind code	B2
Filing date	Dec 6, 2022
Priority date	Dec 6, 2021
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

The present disclosure relates to a power tool ( 1 ) driven by an internal combustion engine and comprising a housing ( 9 ) and having a service access interface ( 11 ) for connecting to an internal control unit of the engine during service. The access interface ( 11 ) comprises a connector ( 21 ) and an access interface cable, connecting the connector ( 21 ) to the control unit. The housing comprises an opening ( 15 ), and a grommet ( 13 ) is provided configured to clamp the access interface cable or the connector ( 21 ). The grommet ( 13 ) is configured to be moved between an operating position and a service position. In the operating position, the grommet ( 13 ) is located in the opening ( 15 ), the access interface cable and connector ( 21 ) being fully enclosed in the housing ( 9 ), and in the service position, the grommet ( 13 ) is located in said notch, the access interface cable or connector ( 21 ) extending through the opening inside the grommet ( 13 ).

First claim

The invention claimed is:

1 . A power tool comprising a housing, an internal combustion engine, an electronic control unit for controlling and/or monitoring the internal combustion engine, the internal combustion engine and the control unit being enclosed in the housing, and a service access interface for connecting to the control unit when servicing the internal combustion engine,
wherein the access service interface comprises a connector and an access interface cable, connecting the connector to the control unit, wherein the housing comprising an opening, and wherein the power tool comprises a grommet configured to clamp the access interface cable or the connector, the grommet being configured to be moveable between an operating position and a service position, wherein
in the operating position, a portion of the grommet is located in said opening, the access interface cable and connector being fully enclosed in the housing, and
in the service position, the grommet is located in said opening, the access interface cable or connector extending through the opening inside the grommet.

2 . The power tool according to claim 1 , wherein the housing comprises at least a first shell part and a second shell part, the opening comprising a notch in an edge of at least one of the first and second shell parts at a shell interface where the first and second shell parts meet.

3 . The power tool according to claim 1 , wherein the grommet is made in an elastomer material.

4 . The power tool according to claim 3 , wherein the grommet is oversized in at least two dimensions with regard to the opening such that the grommet is compressed when fitted in the opening in the operating position.

5 . The power tool according to claim 1 , wherein a portion of the grommet is provided with a circumferential groove to fit in the opening with a form-fitting function.

6 . The power tool according to claim 1 , wherein the grommet is configured to be turned at least 75 degrees between the operating position and the service position.

7 . The power tool according to claim 1 , wherein the grommet is snap fit on the connector or the access interface cable.

8 . The power tool according to claim 1 , wherein the grommet is integrated with the connector or the access interface cable.

9 . The power tool according to claim 1 , wherein the power tool is a chainsaw.

10 . A grommet for a power tool, comprising a retaining part extending along a first direction and having an opening for clamping a connector, wherein the retaining part has outer cross-sectional dimensions at a connecting location thereof adapted to fit, in a first position, in an opening in a housing, and a front part, protruding from the retaining part in a direction traversing said first direction, at least at a portion of the front part having substantially a same cross-sectional dimensions as the retaining part at said connecting location such that the front part is enabled to be fitted in the same opening.

11 . The grommet according to claim 10 , further comprising a cap configured to be fitted on the connector when clamped in the retaining part.

12 . The grommet according to claim 10 , wherein the front part comprises a circumferential groove for form fitting with said opening.

Assignees

• Husqvarna Ab

Inventors

• Bergner Jonas
• Evergren Mikael
• Rydholm Tobias
• Pettersson Marcus

Classifications

• B23D59/008

  comprising computers · CPC title

• B23D57/023

  hand-held or hand-operated · CPC title

• H02G3/02

  Details · CPC title

• F02B63/02

  for hand-held tools · CPC title

• B28D1/08

  with saw-blades of endless cutter-type, e.g. chain saws {, i.e. saw chains}, strap saws (B28D1/10 takes precedence) · CPC title