Sealing washer assembly for large diameter holes on flat surfaces
AssigneeHamilton Sundstand Corporation
InventorsJessica Lyn Michalski, Charles V. DeSantis
Life of this patent
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Abstract
A sealing washer assembly includes a main washer with a bottom annular groove for a removable O-ring and a top recess for a sealing washer. A fastener such as a screw or bolt passes through the sealing washer and the main washer, into a hole in a mounting surface. When the fastener is tightened, the main washer is clamped to the mounting surface to create a metal-to-metal seal, the O-ring is deformed to create a seal between the main washer and the mounting surface, and the sealing washer is deformed to create a seal between the fastener and the main washer.
Claims20
An assembly comprising:
- a mounting surface having an aperture;
- a main washer located on the mounting surface, the main washer having a top surface, a bottom surface, a central recess in the top surface, an annular groove in the bottom surface, and a central hole;
- an O-ring located in the annular groove;
- a sealing washer located in the central recess;
- and
- a fastener with a head and a shaft, the shaft passing through the sealing washer and main washer and secured so that a first seal is formed between the main washer and the mounting surface by clamping the bottom surface of the main washer tightly against the mounting surface, a second seal is formed between the main washer and the mounting surface by compressing the O-ring, and a third seal is formed between the head and the main washer by compressing the sealing washer, such that the head is situated within the central recess when secured.
An assembly comprising:
- a housing including a base, a cover, a hole in the cover, and a threaded receptacle in the base aligned with the hole in the cover;
- a main washer located on the cover, the main washer having a top surface, a bottom surface, a central recess in the top surface, an annular groove in the bottom surface, and a central hole;
- an O-ring located in the annular groove;
- a sealing washer located in the central recess;
- and
- a fastener with a head and a shaft, the shaft passing through the sealing washer and main washer and secured in the threaded receptacle so that a first seal is formed between the main washer and the cover by clamping the bottom surface of the main washer tightly against the cover, a second seal is formed between the main washer and the cover by compressing the O-ring, and a third seal is formed between the head and the main washer by compressing the sealing washer, such that the head is situated within the central recess when secured.
A method for securing a component within a housing having a base, a cover, a hole in the cover, and a threaded receptacle in the base, comprising:
- positioning the component over the threaded receptacle of the base;
- positioning the cover over the component so that the hole in the cover is aligned with the threaded receptacle;
- aligning a washer assembly with the hole in the cover, the washer assembly including a main washer having a top surface, a bottom surface, a central recess in the top surface, an annular groove in the bottom surface, and a central bore, an O-ring positioned in the annular groove, and a sealing washer positioned in the central recess;
- inserting a threaded shaft of a fastener through the sealing washer, the main washer, and the hole in the cover;
- and
- threading the shaft into the threaded receptacle such that a head of the fastener is situated within the central recess when secured, thereby clamping the main washer flush atop the cover to create a metal-to-metal seal, compressing the sealing washer to create a seal between the head of the fastener and the main washer, and compressing the O-ring to create a seal between the main washer and the cover.
Dependencies are inferred from the claim text.