Patent US4291418A successfully refreshed from Google Patents.
US4291418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crash-helmet
Assignee: Individual
•
Filing: 1979-09-14
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Granted: 1981-09-29
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Expires: 1999-09-14
Abstract
Abstract Crash-helmet in the form of a bell-shaped hood with a visor covering the field of view and arranged above a chin guard, characterized in that the hood consists of at least two swivelling parts connected by means of a hinge arrangement and which can be interlocked by safety locking devices on the abutting surfaces.
Inventors
- 👤 Kurt Zeisler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:38
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/32; A42B3/328
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
A crash helmet in the from of a substantially rigid one-piece bell-shaped hood having a head portion which extends to at least the height of the auditory canal, the hood having an integrally formed substantially rigid guard portion extending fully across the chin of the wearer and a visor for covering the field of view arranged above the chin guard portion, the hood comprising at least two swiveling parts connected by means of a hinge arrangement, the parts having at least one plane of separation through the chin guard portion, the parts being interlocked by means on the abutting surfaces of the parts and wherein the hood is separably divided at least on one side of a vertex plane and approximately at the height of the auditory canal by a transverse plane extending at a right angle to the vertex plane and between the vertex plane and the approximate auditory canal height, the approximate quarter hood sector obtained thereby swiveling about a hinge located at the approximate auditory canal height.
Claim 2
Dependent Claim
170 words
A crash helmet in the from of a substantially rigid one-piece bell-shaped hood having a head portion which extends to at least the height of the auditory canal, the hood having an integrally formed substantially rigid guard portion extending fully across the chin of the wearer and a visor for covering the field of view arranged above the chin guard portion, the hood comprising at least two swiveling parts connected by means of a hinge arrangement, the parts having at least one plane of separation through the chin guard portion, the parts being interlocked by means on the abutting surfaces of the parts and wherein the hood is separably divided at least on one side of a vertex plane and approximately at the height of the auditory canal by a transverse plane extending at a right angle to the vertex plane and between the vertex plane and the approximate auditory canal height, the approximate quarter hood sector obtained thereby swiveling about a hinge located at the approximate auditory canal height.
Claim 3
Dependent Claim
78 words
A crash helmet according to claim 1 wherein the entire hood is divided into separable parts approximately at the height of the auditory canal by a transverse plane extending at a right angle to a vertex plane, the parts swiveling about a hinge located at the rear of the hood and the locking means is located in the transverse plane at the abutting separable surfaces on each side of the vertex plane at the approximate auditory canal height.
Claim 4
Dependent Claim
57 words
A crash helmet according to claim 1 or 2 or 6 wherein the part of the hood lying below the transverse plane is separably divided in the vertex plane in the region of the chin guard portion and the locking means is located in the vertex plane at the abutting separable surfaces of the chin guard portion.
Claim 5
Dependent Claim
67 words
A crash helmet according to claim 1 wherein the hood is separably divided by a transverse plane extending at a right angle to a vertex plane and between the vertex plane and the approximate auditory canal height, one side of the hood being separably divided in the vertex plane and another substantially opposite side of the hood separably divided in a plane parallel to the vertex plane.
Claim 6
Dependent Claim
17 words
A crash helmet according to claim 4 wherein the parallel plane passes through the chin guard portion.
Claim 7
Dependent Claim
37 words
A crash helmet according to claim 1 wherein the locking means is located in the vertex plane at the abutting front separable surfaces below the visor and at the abutting rear surfaces at a lower hood edge.
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) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |