Patent · US Active

Device for locking a piston rod of a piston of an actuator which is pressurizable in order to disengage a parking lock and is spring-loaded in order to engage the parking lock

US11767914B2 · kind B2 · utility

0Cited by

3References

11Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Florian Weinl · Gettorf, DE
Thomas Schwegler · Tettnang, DE
Maik Wiesner · Weingarten, DE
Dirk Leutheuser · Oberdorf, DE

Key dates

Filing date	Dec 4, 2020
Grant date	Sep 26, 2023
Priority date	—
Expiry date	Apr 23, 2041

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H63/36
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

In a device for locking a piston rod of a piston of an actuator, an armature rod of an electromagnet is axially movable counter to a preloading spring and includes two actuating contours. Latching mechanisms are operable to mechanically fix the piston. An axial distance between base points of the actuating contours is such that the piston is mechanically fixable by only one of the latching mechanisms in each case. Interlocking elements of both latching mechanisms are accommodated in an axially fixed manner in a sleeve, are radially displaceable, and are selectively engageable with the piston.

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