Patent · US Active

Piston/cylinder unit with solenoid valve in piston

US7806244B2 · kind B2 · utility

1Cited by

8References

18Claims

0Family size

Assignee

Stabilus GmbH · DE

Inventors

Marian Bochen · Eitelborn, DE
Thomas Ehre · Koblenz, DE
Rainer Massmann · Bonn, DE
Rolf Mintgen · Peitz - Picnjo, DE

Key dates

Filing date	Jan 24, 2008
Grant date	Oct 5, 2010
Priority date	—
Expiry date	Dec 6, 2028

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16F9/34
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A piston/cylinder unit includes a closed cylinder filled with a fluid under pressure, a piston dividing the cylinder into a first working chamber and a second working chamber, and a piston rod extending through the second working chamber. A passage through the piston connects the first working chamber to the second working chamber, and a valve closing member is movable between an open position and a closed position wherein the member closes the passage. A solenoid includes a coil, a coil core, and an armature in the piston, the armature driving the valve closing member between the closed position and the open position in response to a magnetic field produced by a current applied to the coil, the cylinder forming a magnetic field guide tube. The coil is supplied with current by a power line in the piston rod, and may be grounded to the piston rod or the cylinder.

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