E05F—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
E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
E05F1/12—Mechanisms in the shape of hinges or pivots, operated by springs
E05F1/123—Mechanisms in the shape of hinges or pivots, operated by springs with a torsion bar