.~.~ Having transverse helical spring or elastic strip {4}
291
.~.~.~ Over-center spring or linkage travel (e.g., "holdback hinge")
DEFINITION
Classification: 16/291
Over-center spring or linkage travel (e.g., "holdback hinge"):
(under subclass 286) Hinge including means which first causes the elastically deformable element to reach a point of maximum deflection as a hinged member* reaches a particular position in its swing about the hinge axis*, and then allows the element to retreat from the point of maximum deflection as the hinged member continues to swing past the position.
(1) Note. Included herein are hinges having a toggle linkage which serves to bias a hinged member* about a single hinge axis* toward the open and closed positions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
323, for hinges having a spring-biased toggle catch, but wherein the hinged members* are not biased resiliently about the hinged axis*.
