High-pressure hydraulic valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Feb 26, 2002
Grant Date -
N/A
app pub date -
Aug 17, 2000
filing date -
Feb 20, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a high-pressure hydraulic valve in which the housing (1) at least and also preferably the operational parts, such as the main control piston (3), the manometer piston (6) and the like which are arranged inside said housing (1) and influence the hydraulic oil flow, are made of an aluminium alloy that can be hardened and tempered. The weight of the high-pressure hydraulic valve can therefore be substantially reduced. The surfaces of the parts made of the aluminium alloy that can be hardened and tempered are advantageously submitted to anodic oxidation in order to increase even more their wear resistance. This type of high-pressure hydraulic valve with a particularly light weight is mainly intended for use in mobile hydraulic systems such as those used in mobile cranes, in lifting platforms and in excavators.
First Claim
Other Claims data not available
Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| EP | B1 | EP1055078 | Feb 08, 1999 |
| JP | A | JP2002504656 | Feb 08, 1999 |
| WO | A1 | WO1999042751 | Feb 08, 1999 |
| KR | A | KR20010040922 | Aug 11, 2000 |
International Classification(s)
- 2000 Application Filing Year
- F16K Class
- 914 Applications Filed
- 406 Patents Issued To-Date
- 44.43 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 4 Citation Count
- F16K Class
- 3.95 % this patent is cited more than
- 23 Age