Patent · US Active

Valve system for drilling systems

US8028613B2 · kind B2 · utility

5Cited by

3References

26Claims

0Family size

Assignee

Longyear TM, Inc. · US

Inventors

Stefan Wrede · Kirchhundem, DE
Christof Kruse · Wenden, DE

Key dates

Filing date	Apr 27, 2010
Grant date	Oct 4, 2011
Priority date	—
Expiry date	Apr 27, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/87917
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A valve system includes a load holding valve, a feed balancing valve, and a fast feed differential valve. The load holding valve may be in fluid communication with the load holding valve. The fast feed differential valve is configured to move between an engaged state and a disengaged state. In the engaged state the fast feed differential valve fluidly couples a ring side of a feed cylinder, the load holding valve, and a piston side of the feed cylinder to allow fluid to flow from the ring side to the piston side.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.