Percussion tool
US-2024198505-A1 · Jun 20, 2024 · US
Hand-held power tool
US11364611B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11364611-B2 |
| Application number | US-201917291216-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 20, 2019 |
| Priority date | Dec 20, 2018 |
| Publication date | Jun 21, 2022 |
| Grant date | Jun 21, 2022 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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- CPC / IPC classifications
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Abstract
Official abstract text for this publication.
A chiseling hand-held power tool having a tool holder for holding a tool on a working axis, an electric motor, and a striking mechanism. The striking mechanism has an excitation piston coupled to the motor, a striker guided on the working axis and a pneumatic chamber closed by the excitation piston and the striker for coupling a movement of the striker to the excitation piston. The rotational speed of the electric motor corresponds to at least 20 times the striking rate of the striking mechanism.
First claim
Opening claim text (preview).
The invention claimed is: 1. A portable power chiseling tool, comprising a tool holder for holding a tool on a working axis, an electric motor, the electric motor having a mass and a rated power, a striking mechanism, which has an exciter piston coupled to the electric motor, a striker guided on the working axis, a pneumatic chamber, which is closed by the exciter piston and the striker and is provided for coupling a movement of the striker to the exciter piston, wherein a speed of the electric motor corresponds to at least 20 times a striking rate of the striking mechanism, a speed of the electric motor is greater than 80,000 revolutions per minute, and a ratio of the mass of the electric motor to the rated power of the electric motor is less than 0.2 g/W. 2. The portable power chiseling tool as claimed in claim 1 , wherein the striking mechanism is supplied with no more than 1 joule per revolution of the electric motor. 3. The portable power chiseling tool as claimed in claim 1 , wherein the electric motor has a rotor and a moment of inertia of the rotor is less than 250 g/cm 2 . 4. The portable power chiseling tool as claimed in claim 1 , comprising a transmission, which is arranged in a power path between the electric motor and the striking mechanism, wherein the transmission contains at least one planetary transmission stage. 5. The portable power chiseling tool as claimed in claim 4 , wherein the planetary transmission stage is arranged directly on a rotor of the electric motor. 6. The portable power chiseling tool as claimed in claim 2 , wherein the electric motor has a rotor and a moment of inertia of the rotor is less than 250 g/cm 2 . 7. The portable power chiseling tool as claimed in claim 2 , comprising a transmission, which is arranged in a power path between the electric motor and the striking mechanism, wherein the transmission contains at least one planetary transmission stage. 8. The portable power chiseling tool as claimed in claim 3 , comprising a transmission, which is arranged in a power path between the electric motor and the striking mechanism, wherein the transmission contains at least one planetary transmission stage. 9. The portable power chiseling tool as claimed in claim 6 , comprising a transmission, which is arranged in a power path between the electric motor and the striking mechanism, wherein the transmission contains at least one planetary transmission stage. 10. The portable power chiseling tool as claimed in claim 7 , wherein the planetary transmission stage is arranged directly on a rotor of the electric motor. 11. The portable power chiseling tool as claimed in claim 8 , wherein the planetary transmission stage is arranged directly on a rotor of the electric motor. 12. The portable power chiseling tool as claimed in claim 9 , wherein the planetary transmission stage is arranged directly on a rotor of the electric motor.
Assignees
Inventors
Classifications
Use of weights; Weight properties of the tool · CPC title
- B25D11/125Primary
with a fluid cushion between the crank drive and the striking body · CPC title
comprising a wobbling mechanism, swash plate · CPC title
Electric motors · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11364611B2 cover?
- A chiseling hand-held power tool having a tool holder for holding a tool on a working axis, an electric motor, and a striking mechanism. The striking mechanism has an excitation piston coupled to the motor, a striker guided on the working axis and a pneumatic chamber closed by the excitation piston and the striker for coupling a movement of the striker to the excitation piston. The rotational s…
- Who is the assignee on this patent?
- Hilti Ag
- What technology area does this patent fall under?
- Primary CPC classification B25D11/125. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jun 21 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).