Patent US3877076A successfully refreshed from Google Patents.
US3877076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety hat energy absorbing liner
Assignee: MSA Safety Inc
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Filing: 1974-05-08
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Granted: 1975-04-15
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Expires: 1994-05-08
Abstract
Abstract An energy absorbing liner for a safety hat includes a curved shell and a plurality of laterally spaced stiff permanently deformable hollow shock absorbing members having inner and outer ends integrally connected to the shell and substantially perpendicular to it. The liner is of a shape to fit inside a safety hat with the shock absorbing members substantially perpendicular to the overlying wall of the hat.
Inventors
- 👤 James J Summers
- 👤 Harry W Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:20
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/10; A42B3/12; A42B3/124; A42B3/06; A42B3/062; A42B3/065
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
72 words
An energy absorbing liner for a safety hat, comprising a curved shell and a plurality of laterally spaced stiff permanently deformable hollow shock absorbing members having inner and outer ends, said members being integrally connected at one end to said shell and substantially perpendicular thereto, and the liner being of a shape to fit inside a safety hat with said shock absorbing members substantially perpendicular to the overlying wall of the hat.
Claim 2
Dependent Claim
72 words
An energy absorbing liner for a safety hat, comprising a curved shell and a plurality of laterally spaced stiff permanently deformable hollow shock absorbing members having inner and outer ends, said members being integrally connected at one end to said shell and substantially perpendicular thereto, and the liner being of a shape to fit inside a safety hat with said shock absorbing members substantially perpendicular to the overlying wall of the hat.
Claim 3
Dependent Claim
22 words
An energy absorbing liner according to claim 1, in which said shock absorbing members project from the concave side of said shell.
Claim 4
Dependent Claim
29 words
An energy absorbing liner according to claim 1, in which said shock absorbing members project from the convex side of said shell to space the shell from the hat.
Claim 5
Dependent Claim
37 words
An energy absorbing liner according to claim 1, in which some of said shock absorbing members project from one side of said shell, and the rest of said members project from the opposite side of the shell.
Claim 6
Dependent Claim
16 words
An energy absorbing liner according to claim 1, in which said shock absorbing members are cylindrical.
Claim 7
Dependent Claim
17 words
An energy absorbing liner according to claim 1, in which said shock absorbing members are tapered lengthwise.
Claim 8
Dependent Claim
22 words
An energy absorbing liner according to claim 1, in which the ends of said shock absorbing members opposite the shell are open.
Claim 9
Dependent Claim
19 words
An energy absorbing liner according to claim 1, in which said shock absorbing members are open at both ends.
References Cited (Backward Citations)
US2971195A
Cited
US3208080A
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US3447163A
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US3616463A
Cited
US3729744A
Cited
US3820163A
Cited
US3829900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |