US3895409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spacer grommet and method of manufacture thereof
Assignee: Johns Manville Corp
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Filing: 1973-08-31
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Granted: 1975-07-22
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Expires: 1993-08-31
Abstract
Abstract A spacer grommet composed of a plurality of layers is disclosed. The spacer grommet is formed by the convolute winding of an elongated strip of material, usually sheet metal. The shoulder portions are formed from multiple layers of rock, flanges, or axial corrugations. A method of fabrication of the spacer grommet is also disclosed.
Inventors
- 👤 Frank Kwatonowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:24
CPC Classifications
B; B65; B65D; B65D67/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/4992; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
139 words
A spacer grommet comprising a single strip of sheet material and having a. a core composed of at least one layer of said sheet material, said core surrounding the axis of and defining an axial opening through said spacer grommet; b. a spacer segment composed of at least one layer of said sheet material, said spacer segment i. being disposed radially outwardly from and adjacent to said core; axial ii. cooperating with said core to form a shoulder at each axis end of said segment; and c. said core having at each axial end thereof a locking portion, each locking portion extending axially beyond the corresponding shoulder of said spacer segment, the amount of extension being such that said locking portion when turned radially outwardly will cooperate with said shoulder to retain said spacer grommet in its operative position.
Claim 2
Dependent Claim
139 words
A spacer grommet comprising a single strip of sheet material and having a. a core composed of at least one layer of said sheet material, said core surrounding the axis of and defining an axial opening through said spacer grommet; b. a spacer segment composed of at least one layer of said sheet material, said spacer segment i. being disposed radially outwardly from and adjacent to said core; axial ii. cooperating with said core to form a shoulder at each axis end of said segment; and c. said core having at each axial end thereof a locking portion, each locking portion extending axially beyond the corresponding shoulder of said spacer segment, the amount of extension being such that said locking portion when turned radially outwardly will cooperate with said shoulder to retain said spacer grommet in its operative position.
Claim 3
Dependent Claim
22 words
The spacer grommet of claim 1 further comprising means for securing said spacer segment and said core in a fixed radial configuration.
Claim 4
Dependent Claim
34 words
The spacer grommet of claim 2 wherein said means comprises at least one spot weld at the terminal point of said single strip of material at the radially outward extremity of said spacer segment.
Claim 5
Dependent Claim
18 words
The spacer grommet of claim 1 wherein said core comprises essentially a single layer of said sheet material.
Claim 6
Dependent Claim
30 words
The spacer grommet of claim 1 wherein said spacer segment comprises a single layer of said sheet material and is disposed immediately adjacent to and in contact with said core.
Claim 7
Dependent Claim
29 words
The spacer grommet of claim 5 wherein each of said shoulders of said spacer segment comprises a flange Extending radially outwardly at an axial extremity of said spacer segment.
Claim 8
Dependent Claim
13 words
The spacer grommet of claim 5 wherein said spacer segment contains axial corrugations.
Claim 9
Dependent Claim
19 words
The spacer grommet of claim 1 wherein said spacer segment comprises a plurality of layers of said sheet material.
Claim 10
Dependent Claim
13 words
The spacer grommet of claim 8 wherein the radial cross-section is a spiral.
Claim 11
Dependent Claim
32 words
The spacer grommet of claim 5 wherein the amount of extension of each of said locking portions is approximately equal to the radial width of the corresponding flange of said spacer segment.
Claim 12
Independent Claim
130 words
A method of forming a multi-layer spacer having a core and spacer segment from a single strip of sheet material which comprises a. forming an elongate strip of sheet material having at one end thereof a core-forming section having a length at least approximately equal to the circumference of the core of the spacer grommet, and at the other end thereof a spacer segment forming section having a length at least approximately equal to the circumference of the first annular layer radially outwardly from and adjacent to said core, b. imparting transverse corrugations to said spacer segment forming section; and c. convolutely winding said elongate strip about a mandrel to form the spacer grommet, said mandrel having an outer diameter approximately equal to the inner diameter of said spacer grommet.
Claim 13
Independent Claim
130 words
A method of forming a multi-layer spacer having a core and spacer segment from a single strip of sheet material which comprises a. forming an elongate strip of sheet material having at one end thereof a core-forming section having a length at least approximately equal to the circumference of the core of the spacer grommet, and at the other end thereof a spacer segment forming section having a length at least approximately equal to the circumference of the first annular layer radially outwardly from and adjacent to said core, b. imparting transverse corrugations to said spacer segment forming section; and c. convolutely winding said elongate strip about a mandrel to form the spacer grommet, said mandrel having an outer diameter approximately equal to the inner diameter of said spacer grommet.
Claim 14
Independent Claim
134 words
A method of forming a multi-layer spacer having a core and spacer segment from a single strip of sheet material which comprises a. forming an elongate strip of sheet material having at one end thereof a core-forming section having a length at least approximately equal to the circumference of the core of the spacer grommet, and at the other end thereof a spacer segment forming section having a length at least approximately equal to the circumference of the first annular layer radially outwardly from and adjacent to said core, b. forming a flange at each transverse extremity of said spacer segment forming section; and c. convolutely winding said elongate strip about a mandrel to form the spacer grommet, said mandrel having an outer diameter approximately equal to the inner diameter of said spacer grommet.
Claim 15
Independent Claim
134 words
A method of forming a multi-layer spacer having a core and spacer segment from a single strip of sheet material which comprises a. forming an elongate strip of sheet material having at one end thereof a core-forming section having a length at least approximately equal to the circumference of the core of the spacer grommet, and at the other end thereof a spacer segment forming section having a length at least approximately equal to the circumference of the first annular layer radially outwardly from and adjacent to said core, b. forming a flange at each transverse extremity of said spacer segment forming section; and c. convolutely winding said elongate strip about a mandrel to form the spacer grommet, said mandrel having an outer diameter approximately equal to the inner diameter of said spacer grommet.
References Cited (Backward Citations)
US1688762A
Cited
US2039386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |