Patent · US Active

Pilot-operated directional control valve

US10400912B2 · kind B2 · utility

1Cited by

2References

16Claims

0Family size

Assignee

HYDAC FLUIDTECHNIK GMBH · DE

Inventors

Frank Schulz · Blieskastel, DE
Markus Bill · Eppelborn, DE

Key dates

Filing date	Oct 14, 2015
Grant date	Sep 3, 2019
Priority date	—
Expiry date	Oct 14, 2035

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16K31/406
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A pilot-controlled directional control valve, in particular a directional poppet valve, has a valve housing (10), at least three fluid connection points (12, 14, 16), a main control stage (18) and a pilot control stage. A further fluid-controlling intermediate stage (22) is arranged between the main control stage (18) and the pilot control stage (20). The main control stage (18) has a longitudinally movable main control piston (24). The pilot control stage has a longitudinally movable pilot control piston (26).

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