Pneumatic chipping hammer

Patent metadata

Field	Value
Publication number	US-12459099-B2
Application number	US-201917680845-A
Country	US
Kind code	B2
Filing date	Aug 29, 2019
Priority date	Aug 29, 2019
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

The present application discloses a pneumatic chipping hammer, and relates to a pneumatic impact tool, which comprises a handle part, the handle part being a hollow member; a main power part, one end of the main power part being connected to the handle part, and principal axes of the handle part and the main power part forming a certain angle; and a chisel part, the chisel part being detachably connected to the other end of the main power part, wherein the direction of mounting the chisel part on the main power part can be changed. According to the pneumatic chipping hammer of the present application, the mounting direction of the chisel part on the main power part is changed by the locking member, and therefore the angle between the principal axes of the handle part and the main power part can be 5-85 degrees, so that a handle is inclined to further achieve different purposes and be suitable for people with different heights.

First claim

The invention claimed is:

1 . A pneumatic chipping hammer, comprising:
a handle part, the handle part being a hollow member; a main power part, one end of the main power part being connected to the handle part, and principal axes of the handle part and the main power part forming a certain angle between them; and a chisel part, the chisel part being detachably connected to another end of the main power part, wherein a direction of mounting of the chisel part on the main power part can be changed; wherein the handle part is provided with a first end and a second end which is opposite to the first end; wherein the main power part comprises a locking member and an air cylinder member; wherein the air cylinder member is provided with a third end and a fourth end which is opposite to the third end; and wherein the locking member is provided on an outer side of the fourth end of the air cylinder member, the locking member is connected to the air cylinder member via an elastic member and a lock member, and a circular groove is provided in the locking member and located below the lock member to make room for the lock member when the chisel part is disassembled and assembled.

2 . The pneumatic chipping hammer of claim 1 , wherein the angle between the principal axes of the handle part and the main power part is 5-85 degrees.

3 . The pneumatic chipping hammer of claim 1 , wherein the handle part is provided with an air intake member and a handle member successively from the first end to the second end, the handle member is a curved handle and the handle member is internally provided with a first air passage, and the air intake member is in communication with the first air passage via an air tube member.

4 . The pneumatic chipping hammer of claim 3 , wherein the handle part further comprises a trigger member, wherein the trigger member is provided at the first end, the trigger member is connected to the air intake member via a hinge pin, and the trigger member is in linkage with the air tube member to control connection and disconnection of an air channel.

5 . The pneumatic chipping hammer of claim 4 , wherein the main power part further comprises a main body member which is internally provided with a second air passage; wherein the third end of the air cylinder member is positioned in the main body member, and the air cylinder member is in communication with the second air passage;
wherein a cavity of the air cylinder member is internally provided with an impact member, and the impact member reciprocates in the cavity of the air cylinder member; and wherein the main body member is connected to the second end of the handle part via a connecting member, and the fourth end of the air cylinder member is connected to the chisel part via the locking member.

6 . The pneumatic chipping hammer of claim 5 , wherein the air cylinder member is an integral member.

7 . The pneumatic chipping hammer of claim 5 , wherein the connecting member is a hollow pipe which communicates the first air passage with the second air passage.

8 . The pneumatic chipping hammer of claim 5 , wherein the chisel part comprises a connecting end and a working end connected to the connecting end, the connecting end being provided with a clamping portion matching the lock member.

9 . The pneumatic chipping hammer of claim 1 , wherein detachable wheels are provided on two sides of a middle portion of the chisel part.

10 . The pneumatic chipping hammer of claim 2 , wherein the handle part is provided with an air intake member and a handle member successively from the first end to the second end, the handle member is a curved handle and the handle member is internally provided with a first air passage, and the air intake member is in communication with the first air passage via an air tube member.

11 . The pneumatic chipping hammer of claim 10 , wherein the handle part further comprises a trigger member, wherein the trigger member is provided at the first end, the trigger member is connected to the air intake member via a hinge pin, and the trigger member is in linkage with the air tube member to control connection and disconnection of an air channel.

12 . The pneumatic chipping hammer of claim 11 , wherein the main power part further comprises a main body member which is internally provided with a second air passage;
wherein the third end of the air cylinder member is positioned in the main body member, and the air cylinder member is in communication with the second air passage; wherein a cavity of the air cylinder member is internally provided with an impact member, and the impact member reciprocates in the cavity of the air cylinder member; and wherein the main body member is connected to the second end of the handle part via a connecting member, and the fourth end of the air cylinder member is connected to the chisel part via the locking member.

13 . The pneumatic chipping hammer of claim 12 , wherein the air cylinder member is an integral member.

14 . The pneumatic chipping hammer of claim 12 , wherein the connecting member is a hollow pipe which communicates the first air passage with the second air passage.

15 . The pneumatic chipping hammer of claim 12 , wherein the chisel part comprises a connecting end and a working end connected to the connecting end, the connecting end being provided with a clamping portion matching the lock member.

16 . The pneumatic chipping hammer of claim 2 , wherein detachable wheels are provided on two sides of a middle portion of the chisel part.

Assignees

• Hangzhou United Tools Co Ltd
• Hangzhou Great Star Ind Co Ltd

Inventors

• Wang Weiyi

Classifications

• B25D17/08

  Means for retaining and guiding the tool bit, e.g. chucks {allowing axial oscillation of the tool bit (B25D17/005 takes precedence)} · CPC title

• B25D17/04

  Handles; Handle mountings · CPC title

• B25D17/02

  Percussive tool bits {(drill bits for earth drilling E21B10/00)} · CPC title

• B25D17/32

  Trolleys · CPC title

• B25D9/00 Primary

  Portable percussive tools with fluid-pressure drive, {i.e. driven directly by fluids}, e.g. having several percussive tool bits operated simultaneously {(portable non-percussive drilling tools driven by fluid pressure or pneumatic power B23B45/04)} · CPC title