Abstract 1,025,760. Bearings. PLASTIC & RUBBER PRODUCTS CO. Dec. 11, 1964 [Dec. 17, 1963], No. 50562/64. Heading F2A. [Also in Division B5] A replaceable bearing insert comprises a rubber backing layer 18 (Fig. 2, not shown) and a rubber bearing layer 20, the bearing layer having a high Shore hardness relative to the backing layer and being substantially thicker than the backing layer. The layers are bonded together and the bearing layer has axial grooves in its inner surface. The insert is cylindrical or formed from a rectangular sheet rolled into cylindrical form so that two edges are in close proximity or abut and may be bonded together. The insert is retained within a metal sleeve 12 by shoulders 16, the sleeve being secured in a marine propeller shaft supporting strut 22 by set-screw 32 (Fig. 1, not shown).
THE COMBINATION OF: A REVOLVING SHAFT EXERTING RADIALLY DIRECTED DYNAMIC LOADS AS A CONSEQUENCE OF THE ROTATION OF THE SHAFT; AND A SLEEVE TYPE BEARING SURROUNDING THE SHAFT TO SUPPORT THE SHAFT AGAINST DEFLECTION FROM SAID DYNAMIC LOADS, SAID BEARING INCLUDING A RIGID HOUSING OF CYLINDRICAL SHAPE, AND A LAMINATED RUBBER BEARING INSERT IN THE BEARING HOUSING IN CONTACT THEREWITH AND WITH THE REVOLVING SHAFT, SAID INSERT COMPRISING A RELATIVELY THICK BEARING LAYER OF RELATIVELY HARD RUBBER HAVING A LOW COEFFICIENT OF FRICTION AGAINST THE SHAFT AND SUFFICIENT RIGIDITY TO MAINTAIN THE SHAFT ALIGNED UNDER THE DYNAMIC LOADS AND A RELATIVELY THINNER BACKING LAYER OF RUBBER SOFTER THAN SAID THICKER LAYER HAVING A HIGH COEFFICIENT OF FRICTION TO RESTRAIN THE INSERT FROM TURNING WITH THE SHAFT IN THE SLEEVE AND OF THE ORDER OF .020 INCH IN THICKNESS SO THAT THE DYNAMIC LOADS DO NOT DEFLECT AND MISALIGN THE SHAFT.
Claim 2
Dependent Claim
150 words
THE COMBINATION OF: A REVOLVING SHAFT EXERTING RADIALLY DIRECTED DYNAMIC LOADS AS A CONSEQUENCE OF THE ROTATION OF THE SHAFT; AND A SLEEVE TYPE BEARING SURROUNDING THE SHAFT TO SUPPORT THE SHAFT AGAINST DEFLECTION FROM SAID DYNAMIC LOADS, SAID BEARING INCLUDING A RIGID HOUSING OF CYLINDRICAL SHAPE, AND A LAMINATED RUBBER BEARING INSERT IN THE BEARING HOUSING IN CONTACT THEREWITH AND WITH THE REVOLVING SHAFT, SAID INSERT COMPRISING A RELATIVELY THICK BEARING LAYER OF RELATIVELY HARD RUBBER HAVING A LOW COEFFICIENT OF FRICTION AGAINST THE SHAFT AND SUFFICIENT RIGIDITY TO MAINTAIN THE SHAFT ALIGNED UNDER THE DYNAMIC LOADS AND A RELATIVELY THINNER BACKING LAYER OF RUBBER SOFTER THAN SAID THICKER LAYER HAVING A HIGH COEFFICIENT OF FRICTION TO RESTRAIN THE INSERT FROM TURNING WITH THE SHAFT IN THE SLEEVE AND OF THE ORDER OF .020 INCH IN THICKNESS SO THAT THE DYNAMIC LOADS DO NOT DEFLECT AND MISALIGN THE SHAFT.