F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/141
F16B 43/00 (2006.01)
Patent
CA 1174490
ABSTRACT A self-sealing washer for use between two surfaces to be bolted or screwed tightly together which requires sealing at the surfaces to prevent the leakage of fluid, and which washer can be reused. The structure comprises a rigid spacer consisting of two rigid concentric rings between which is an annular gap containing a sealing ring of flexible but incompressible material such as an elastomer, a thermoplastic or a soft metal. One of the faces of the gaps is tapered in the axial direction of the washer and the inner and outer spacer rings are offset in the uncompressed state of the washer so that when the washer is compressed to bring the spacer rings to the condition where they are mutually aligned the compression face acts to squeeze the spacer ring material to effect sealing action against the surfaces between which the washer is compressed. The theoretical reduction in the volume of the gap between the uncompressed and the compressed state of the washer is in the range of from 5% to 30%.
396201
Borden Ladner Gervais Llp
Freudenberg Carl
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