IP Library › Granted Patent US 12,064,860
Granted Patent B2
US 12,064,860 · App. 17/687,269 · Granted Aug 20, 2024

Hand-guided work apparatus

Inventors: Roland Mandel (Stuttgart, DE); Jonas Hefti (Stuttgart, DE); Jan Bejblik (Prague, CZ)
Assignee: Andreas Stihl AG & Co. KG
B25F5/02A01D34/416A01D34/824A01D34/90A01D2101/00
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Quick Facts
Patent No.
US 12,064,860
App. No.
17/687,269
Granted
Aug 20, 2024
Kind
B2
Abstract

A hand-guided work apparatus has a handle having a first and a second operator-controlled element pivotably mounted thereon. The handle surrounds a guide tube. The first element can activate a motor. The guide tube defines a central plane containing a longitudinal axis. The plane is oriented parallel to a first axis of the first element. The first element projects out of the handle on a first side of the plane. The second element is pivotably mounted on a first and a second pivot bearing arranged on opposite sides of the plane. The tube projects through an opening in the second element. A third operator-controlled element can pivot about a third axis. In its actuated position, the third element holds the second element in its actuated position via a holder. The second axis of the second element lies in a plane extending perpendicular to a fourth axis of the holder.

Claims (66)

1. A hand-guided work apparatus comprising:

a guide tube defining a longitudinal center axis;

a tool unit having at least one tool;

said tool unit being arranged on said guide tube;

a drive motor configured to drive said at least one tool;

a handle surrounding said guide tube arranged on said guide tube;

a first operator-controlled element and a second operator-controlled element pivotably mounted on said handle;

said first operator-controlled element being configured to activate said drive motor and being mounted so as to be pivotable about a first pivot axis, wherein said first pivot axis is transverse to said longitudinal center axis;

said second operator-controlled element being mounted so as to be pivotable about a second pivot axis;

said guide tube defining a central plane containing said longitudinal center axis, wherein said central plane is oriented parallel to said first pivot axis;

said first operator-controlled element projecting out of said handle on a first side of said central plane;

a first pivot bearing;

a second pivot bearing;

said second operator-controlled element being mounted pivotably on said first pivot bearing and said second pivot bearing;

said first pivot bearing being arranged on said first side of said central plane;

said second pivot bearing being arranged on a second side of said central plane opposite said first side;

said second operator-controlled element defining an opening through which said guide tube projects; and,

wherein, viewed parallel to said first pivot axis of said first operator-controlled element, said second pivot axis of said second operator-controlled element is inclined relative to said longitudinal center axis of said guide tube by an angle (x) which lies in a range from 5° to 85°.

2. The work apparatus of claim 1 , wherein said second operator-controlled element extends over an angle of at least 180° about said longitudinal center axis of said guide tube.

3. The work apparatus of claim 1 , wherein said second pivot axis intersects said longitudinal center axis of said guide tube.

4. The work apparatus of claim 1 , wherein said second operator-controlled element, in an unactuated position, blocks movement of said first operator-controlled element in a direction of an actuated position of said first operator-controlled element.

5. The work apparatus of claim 4 , wherein said second operator-controlled element is pivotable out of said unactuated position in a first pivoting direction into a first release position and in a second opposite pivoting direction into a second release position.

6. The work apparatus of claim 1 further comprising a third operator-controlled element mounted on said handle so as to be pivotable about a third pivot axis.

7. The work apparatus of claim 6 , wherein said third operator-controlled element is arranged on said second side of said central plane.

8. The work apparatus of claim 6 , wherein said third pivot axis extends parallel to said first pivot axis.

9. The work apparatus of claim 6 , wherein said third pivot axis extends through said second pivot bearing.

10. A hand-guided work apparatus comprising:

a guide tube defining a longitudinal center axis;

a tool unit having at least one tool;

said tool unit being arranged on said guide tube;

a drive motor configured to drive said at least one tool;

a handle surrounding said guide tube arranged on said guide tube;

a first operator-controlled element and a second operator-controlled element pivotably mounted on said handle;

said first operator-controlled element being configured to activate said drive motor and being mounted so as to be pivotable about a first pivot axis, wherein said first pivot axis is transverse to said longitudinal center axis;

said second operator-controlled element being mounted so as to be pivotable about a second pivot axis;

said guide tube defining a central plane containing said longitudinal center axis, wherein said central plane is oriented parallel to said first pivot axis;

said first operator-controlled element projecting out of said handle on a first side of said central plane;

a first pivot bearing;

a second pivot bearing;

said second operator-controlled element being mounted pivotably on said first pivot bearing and said second pivot bearing;

said first pivot bearing being arranged on said first side of said central plane;

said second pivot bearing being arranged on a second side of said central plane opposite said first side;

said second operator-controlled element defining an opening through which said guide tube projects;

a third operator-controlled element mounted on said handle so as to be pivotable about a third pivot axis and,

a holder configured to hold said second operator-controlled element in a release position as long as said third operator-controlled element is in an actuated position.

11. The work apparatus of claim 10 further comprising a holding element; said third operator-controlled element being configured to act on said holding element; and, said holding element is configured to hold said second operator-controlled element in said release position as long as said third operator-controlled element is in said actuated position.

12. The work apparatus of claim 11 , wherein said third operator-controlled element is configured to act on said holding element via a spring.

13. The work apparatus of claim 11 , wherein said holding element is mounted so as to be pivotable about a fourth pivot axis extending parallel to said third pivot axis.

14. A hand-guided work apparatus comprising:

a drive motor;

at least one tool configured to be driven by said drive motor;

at least one handle;

a first operator-controlled element, a second operator-controlled element, and a third operator-controlled element pivotably mounted on said handle;

said first operator-controlled element being configured to activate said drive motor and being mounted so as to be pivotable about a first pivot axis;

said second operator-controlled element being mounted so as to be pivotable about a second pivot axis;

a blocking unit configured to release said first operator-controlled element in a release position of said blocking unit in order to operate said drive motor and to block said first operator-controlled element in a blocking position of said blocking unit in order to block said drive motor;

said blocking unit being configured to be shifted via said second operator-controlled element between said release position and said blocking position;

said third operator-controlled element is mounted so as to be pivotable about a third pivot axis;

a holding element;

said third operator-controlled element being configured, in a first actuated position, to hold said second operator-controlled element in a second actuated position via said holding element;

said holding element being mounted so as to be pivotable about a fourth pivot axis; and,

said second pivot axis lying in a plane extending perpendicular to said fourth pivot axis.

15. The work apparatus of claim 14 , wherein, in an unactuated position, said second operator-controlled element blocks movement of said first operator-controlled element in a direction of a third actuated position of said first operator-controlled element; and, said second operator-controlled element is configured to be pivoted out of said unactuated position in a first pivoting direction into a first release position and in a second opposite pivoting direction into a second release position.

16. The work apparatus of claim 14 , wherein said third pivot axis extends parallel to said first pivot axis.

17. The work apparatus of claim 14 , wherein said third operator-controlled element is configured to act on said holding element via a spring.

18. The work apparatus of claim 14 , wherein said fourth pivot axis extends parallel to said third pivot axis.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 3, 2022
From: MANDEL, ROLAND; HEFTI, JONAS
To: ANDREAS STIHL AG & CO. KG
Reel/Frame 060705/0736 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 3, 2022
From: BEJBLIK, JAN
To: AKKA CZECH REPUBLIC S.R.O.
Reel/Frame 060705/0814 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 3, 2022
From: AKKA CZECH REPUBLIC S.R.O.
To: ANDREAS STIHL AG & CO. KG
Reel/Frame 060705/0853 →
Priority Claims (1)
EP 21162602 · Mar 15, 2021 · regional
Continuity (1)
Related Publication 20220288765A1 · Sep 15, 2022
Cited By (1)
US 12,728,555