Dampers

Claim 1

A DAMPER COMPRISING TWO RELATIVELY MOVABLE PARTS, ONE COMPOSED OF A RIGID SUBSTANTIALLY NON-DEFORMABLE MATERIAL AND THE OTHER COMPRISING RUBBER MATERIAL SUPPORTED ON A RIGID BACKING, SAID PARTS BEING URGED INTO PRESSURE CONTACT WITH ONE ANOTHER AND BEING SLIDABLE ONE OVER THE OTHER IN OPERATION OF THE DAMPER, SAID ONE OF SAID PARTS HAVING A CORRUGATED FACE OF WHICH THE CORRUGATIONS EXTEND AT A LARGE ANGLE TO THE DIRECTION OF RELATIVE SLIDING MOVEMENT BETWEEN SAID PARTS, SAID CORRUGATED FACE LYING IN ENGAGEMENT WITH SAID LOADING A SMOOTH CONTINUOUS FACE OF THE RUBBER MATERIAL SUBSTANTIALLY WHOLLY IN COMPRESSION UNDER THE ACTION OF THE FORCES URGING THE PARTS INTO PRESSURE CONTACT, AND RUBBER MATERIAL HAVING A MUCH GREATER LENGTH THAN THICKNESS IN THE DIRECTION OF RELATIVE SLIDING MOVEMENT BETWEEN SAID PARTS EACH OF SAID CORRUGATED DEPRESSING SAID RUBBER MATERIAL BY A SUBSTANTIAL AMOUNT COMPARED WITH THE THICKNESS OF THE RUBBER MATERIAL NORMAL TO SAID FACE, AND SAID CORRUGATIONS LYING CLOSE TOGETHER, SAID CORRUGATED FACE THEREBY IMPOSING A CORRUGATED FORM ON SAID SMOOTH CONTINUOUS FACE INVOLVING DEFORMATION OF THE WHOLE OF THE FACE OVER THE AREA OF CONTACT BETWEEN IT AND SAID CORRUGATED FACE, SAID PARTS BEING SLIDABLE RELATIVE TO ONE ANOTHER THROUGHOUT THE NORMAL WORKING TRAVEL OF THE DAMPER CONTINUOUSLY TO SHIFT AND LOCALITY OF EACH OF THE CORRUGATED IMPOSED UPON SAID SMOOTH CONTINUOUS FACE OF THE RUBBER MATERIAL ALONG SAID FACE WHEREBY THE RUBBER MATERIAL IS CONTINUOUSLY UNLOADED AND LOADED ON SAID FACE SUBSTANTIALLY WHOLLY IN COMPRESSION BY SAID CORRUGATED FACE AND ENERGY IS DISSIPATED DUE TO THE HYSTERESIS OF THE RUBBER MATERIAL.