with double-acting springs, e.g. for closing and opening or checking and closing

Full Title

Closers or openers for wings, not otherwise provided for in this subclass > spring-actuated > for swinging wings > with double-acting springs, e.g. for closing and opening or checking and closing

Classification Context

Section:

FIXED CONSTRUCTIONS

Class:

LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES

Subclass:

DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING