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US 9,175,772 B2Granted
Expandable sealing washer
OwnerRalph E. Macheskyinventor
Life of this patent
Estimating the term…
Abstract
An expandable washer apparatus is formed from a resilient elastomeric annular body having an opening therethrough, an upper surface, a lower surface, and an external cylindrical surface. A plurality of cavities extend around the external cylindrical surface. A plurality of cavity sidewalls are associated with the plurality of cavities, the plurality of sidewalls expanding outward to increase the external cylindrical surface circumference when pressure is applied to the upper and lower surfaces.
Claims19
An expandable washer apparatus, comprising:
- a resilient elastomeric annular body having an opening therethrough, an upper surface, a lower surface, and an external cylindrical surface;
- a plurality of cavities extending around the external cylindrical surface;
- and
- a plurality of cavity sidewalls associated with the plurality of cavities, the plurality of sidewalls configured to expand outwardly to increase the external cylindrical surface circumference when pressure is applied to the upper and lower surfaces, wherein at least a subset of the plurality of cavity sidewalls extend from the upper surface toward the lower surface at an angle other than 90 degrees relative to the upper surface.
1 more element
A washer apparatus, comprising:
- a resilient elastomeric annular body having an opening therethrough, an upper surface, a lower surface, and an external cylindrical surface;
- a first plurality of cavities extending around an upper portion of the external cylindrical surface separated by a plurality of first sidewalls, wherein at least a subset of the plurality of first sidewalls extend from the upper surface toward the lower surface at an angle other than 90 degrees relative to the upper surface;
- a second plurality of cavities extending around a lower portion of the external cylindrical surface separated by a plurality of second sidewalls;
- and
- an annular ridge extending around the external surface formed from the bottom walls of the first plurality of cavities and the top walls of the second plurality of cavities, the annular ridge and plurality of first and second sidewalls configured to expand outwardly to increase the external surface circumference when pressure is applied to the upper and lower surfaces.
2 more elements
An expandable washer apparatus, comprising:
- a resilient elastomeric annular body having an opening therethrough, an upper surface, a lower surface, and an external cylindrical surface;
- a plurality of adjacent cavities extending around the external cylindrical surface, wherein at least a subset of the plurality of adjacent cavities extend from the upper surface toward the lower surface at an angle other than 90 degrees relative to the upper surface;
- and
- a resilient elastomeric skin covering the plurality of cavities, the resilient elastomeric skin configured to expand outwardly to increase the external cylindrical surface circumference when pressure is applied to the upper and lower surfaces.
1 more element
Dependencies are inferred from the claim text.