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US 6,609,454 B2Granted
Piston with seal
AssigneeAFM Corporation
InventorStanley A. Frost
Life of this patent
Estimating the term…
Abstract
A method of forming a floating piston includes fabricating a piston cup, wherein the piston cup includes a top, a sidewall void of any seal-gripping irregularities, and an open end, and forming an elastomer seal over the sidewall of the piston cup. A floating piston includes a piston cup having a top, a sidewall extending about the periphery of the top and an open end, wherein the sidewall is void of any seal-gripping irregularities; and an elastomer seal formed about the sidewall of the piston cup.
Claims18
A method of forming a piston comprising:
- fabricating a piston cup, wherein the piston cup includes a top, a sidewall void of any seal-gripping irregularities, and an open end, and
- forming an elastomer seal over the sidewall of the piston cup, including forming a seal overhang which extends beyond the margin of the piston cup open end.
A piston comprising:
- a piston cup having a top, a sidewall extending about the periphery of the top and an open end, said sidewall is void of any seal-gripping structures;
- and
- an elastomer seal formed about said sidewall of said piston cup, including a first seal portion formed about the lower portion of said piston cup of a first elastomer material and a second seal portion formed about the upper portion of said piston cup of a second elastomer material.
A method of forming a piston comprising:
- fabricating a piston cup, wherein the piston cup includes a top, a sidewall void of any seal-gripping irregularities, and an open end, and
- forming an elastomer seal over the sidewall of the piston cup, including forming a bi-material elastomer seal having a first seal portion formed about the lower portion of the piston cup of a first elastomer material and a second seal portion formed about the upper portion of the piston cup of a second elastomer material.
Dependencies are inferred from the claim text.