Patent US4094315A successfully refreshed from Google Patents.
US4094315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ear plug
Assignee: Individual
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Filing: 1976-10-29
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Granted: 1978-06-13
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Expires: 1996-10-29
Abstract
Abstract A sound-reducing ear plug formed of a soft plastic and adapted to fit into ear canals of different sizes.
Inventors
- 👤 Charles Leight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:49
CPC Classifications
A; A61; A61F; A61F11/00; A61F11/06; A61F11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
An ear plug for insertion into an ear canal which includes: a plurality of hollow cylindrical members of progressively larger diameters sizes, the smallest of said cylinders being closed at its free end, and each cylinder being connected to the next larger cylinder by a transition member; the wall thickness of said cylindrical members being varied from the thinnest in said smallest cylinder to the thickest in said largest cylinder; and a hollow conical member open at both ends with its smaller end connected to the largest of said cylindrical members by a transition member, said conical member having a thickness greater than any of said cylindrical members and a mechanical strength sufficient to enable it to be grasped to remove said ear plug from the ear whereby, the wall thickness of said cylindrical members is such as to prevent the collapse of said cylindrical members while permitting said cylindrical members to conform to the shape of an ear canal and said transition members act to stiffen said cylindrical members.
Claim 2
Dependent Claim
170 words
An ear plug for insertion into an ear canal which includes: a plurality of hollow cylindrical members of progressively larger diameters sizes, the smallest of said cylinders being closed at its free end, and each cylinder being connected to the next larger cylinder by a transition member; the wall thickness of said cylindrical members being varied from the thinnest in said smallest cylinder to the thickest in said largest cylinder; and a hollow conical member open at both ends with its smaller end connected to the largest of said cylindrical members by a transition member, said conical member having a thickness greater than any of said cylindrical members and a mechanical strength sufficient to enable it to be grasped to remove said ear plug from the ear whereby, the wall thickness of said cylindrical members is such as to prevent the collapse of said cylindrical members while permitting said cylindrical members to conform to the shape of an ear canal and said transition members act to stiffen said cylindrical members.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |