WO2026118871 - PISTON FOR HYDRAULIC BREAKING HAMMER
National phase entry is expected:
Publication Number
WO/2026/118871
Publication Date
11.06.2026
International Application No.
PCT/CN2025/136211
International Filing Date
20.11.2025
Title **
[English]
PISTON FOR HYDRAULIC BREAKING HAMMER
[French]
PISTON POUR MARTEAU PIQUEUR HYDRAULIQUE
[Chinese]
一种液压破碎锤活塞
Applicants **
TANG, Zongcai
Inventors
TANG, Zongcai
Priority Data
202411746430.8
02.12.2024
CN
Application details
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International Searching Authority |
CNIPA
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| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
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| Type of Assignment |
The Standard Agent's Assignment
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| Applicant's Legal Status |
Natural Person
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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| 译文 |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 1577 | |
| EPO | Filing, Examination, Granting | 8677 | |
| Japan | Filing, Examination, Granting | 1907 | |
| South Korea | Filing, Examination, Granting | 1603 | |
| USA | Filing, Examination, Granting | 4740 |
Total:
18,504
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Abstract[English]
Disclosed in the present invention is a piston for a hydraulic breaking hammer. A spiral oil groove is formed on a piston rod. When two ends of the spiral oil groove are respectively connected to high-pressure hydraulic oil and low-pressure hydraulic oil, the hydraulic oil pushes the piston to rotate, thereby generating an oil film between the piston and a piston cylinder; in addition, owing to relative rotation between the piston and the piston cylinder, the phenomenon of cylinder scuffing due to seizure therebetween is avoided.[French]
La présente invention divulgue un piston pour un marteau piqueur hydraulique. Une rainure d'huile en spirale est formée sur une tige de piston. Lorsque deux extrémités de la rainure d'huile en spirale sont respectivement reliées à de l'huile hydraulique haute pression et à de l'huile hydraulique basse pression, l'huile hydraulique pousse le piston en rotation, générant ainsi un film d'huile entre le piston et un cylindre de piston ; de plus, du fait de la rotation relative entre le piston et le cylindre de piston, le phénomène de frottement de cylindre dû à un grippage entre eux est évité.[Chinese]
本发明公开了一种液压破碎锤活塞，在活塞杆上设置有螺旋油槽，当螺旋油槽的两端分别连接液压油的高压和低压时，液压油会推动活塞旋转，从而产生在活塞和活塞缸之间产生油膜，并且由于活塞和活塞缸之间存在相对转动，活塞与活塞缸之间不会发生卡死而拉缸的现象。