Patent US3580988A successfully refreshed from Google Patents.
US3580988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grommet for speaker enclosure
Assignee: Ampex Corp
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Filing: 1969-08-12
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Granted: 1971-05-25
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Expires: 1989-08-12
Abstract
Abstract A resilient grommet for forming an airtight seal in an opening while permitting the airtight passage of an electrical cord through the opening. The grommet provides strain relief for the cord and is provided with a series of ribs to prevent pullout.
Inventors
- 👤 Donald W Oriowski
- 👤 Donald S Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:21
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/06; H02G3/0616; H02G3/08; H02G3/081; H02G3/083; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872; Y10T29/49876
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
107 words
A resilient grommet for forming an airtight seal for wires passing through an opening, said grommet comprising a first cylindrical portion provided with a plurality of axially spaced circumferential ribs, a second cylindrical portion coaxial and integral with one end of said first cylindrical portion, said second cylindrical portion being provided with a plurality of axially spaced circumferential rings, said rings extending slightly beyond the outer surface of said second cylindrical portion, a central opening extending through the entire length of said grommet parallel to the common axis, said central opening being of uniform cross section and adapted to receive an electrical cord extending through said grommet.
Claim 2
Dependent Claim
107 words
A resilient grommet for forming an airtight seal for wires passing through an opening, said grommet comprising a first cylindrical portion provided with a plurality of axially spaced circumferential ribs, a second cylindrical portion coaxial and integral with one end of said first cylindrical portion, said second cylindrical portion being provided with a plurality of axially spaced circumferential rings, said rings extending slightly beyond the outer surface of said second cylindrical portion, a central opening extending through the entire length of said grommet parallel to the common axis, said central opening being of uniform cross section and adapted to receive an electrical cord extending through said grommet.
Claim 3
Dependent Claim
57 words
A grommet defined in claim 1, further comprising a resilient flange integrally formed at the end of said second cylindrical portion remote from said first cylindrical portion, said flange being of larger diameter than said second cylindrical portion and adapted to provide an abutting surface when said grommet is positioned in an opening to form a seal.
Claim 4
Dependent Claim
47 words
A grommet defined in claim 1, further comprising an elongate stem integrally formed and coaxial with said first cylindrical portion, said stem being of smaller diameter than said firSt cylindrical portion and extending from the end of said first cylindrical portion remote from said second cylindrical portion.
Claim 5
Dependent Claim
54 words
A grommet defined in claim 1, wherein said circumferential ribs comprise a sloping face and a perpendicular face, said sloping face extending radially outward and toward said second cylindrical portion, said perpendicular face extending radially outward perpendicular to the axis of said cylindrical portion and intersecting said sloping face to define a circular edge.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |