公开(公告)号：US3605339A

公开(公告)日：1971-09-20

申请号：US3605339D

申请日：1969-05-06

Applicant: GYRO TECH INC

Inventor： CATLETT JOHN C ,  GILSON JAMES R

IPC: E05D15/30 ,  E05F3/10

CPC classification number: E05F3/102 ,  E05D15/30 ,  E05Y2900/132

Abstract: A MANUALLY BALANCED DOOR COMPRISING A DOOR HAVING A BALANCED HINGE ARRANGEMENT WHEREIN EACH HINGE POINT IS PROVIDED WITH A UNIQUE BEARING ASSEMBLY COMPRISING, IN COMBINATION, THRUST BEARINGS, NEEDLE BEARINGS AND SELF-ALIGNING BEARINGS, THERE BEING A DOOR OPERATOR ADAPTED FOR ACTUATION PURSUANT TO MANUALLY INITIATED SWINGING OF THE DOOR WHICH OPERATOR INCORPORATES MEANS FOR CONTROLLING THE SPEED OF SWING THROUGH THE OPENING AND CLOSING ARCS OF MOVEMENT AND FURTHER EMBODIES A RESILIENT MEMBER FOR STORING OF ENERGY DURING OPENING MOVEMENT TO EFFECTUATE CLOSING UPON RELEASE THEREOF.