US3781914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety helmet visors
Assignee: Stadium Ltd
•
Filing: 1972-02-11
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Granted: 1974-01-01
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Expires: 1992-02-11
Abstract
Abstract A safety helmet visor comprises a curved transparent faceshield having an arcuate slot formed therethrough at each end thereof. A capping member is fitted through each slot and internally of the faceshield is secured to the headband which is mountable on the helmet. Each capping member provides cam portions engageable with the slot so that the faceshield can be moved in an arc, and spring means act between the capping member and the slot to take up play and define positions at which the faceshield is held locked in place.
Inventors
- 👤 I Ramsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:15
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/18; A42B3/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
189 words
A safety helmet visor comprising a curved transparent faceshield having an arcuate slot extending therethrough adjacent to each end thereof, a headband provided with coacting securing means whereby the headband can be detachably mounted on a safety helmet, and a stationary capping member at each end of the faceshield extending from the external surface thereof into the arcuate slots, means securing each of the capping members to the headband to link the faceshield to the headband, the part of each capping member which extends into the arcuate slot comprising a rib extending substantially lengthwise of the arcuate slot and terminating at its ends in a pair of cam portions engaging with the walls of the arcuate slot, spring means being positioned between each of the ribs and a wall of each of the arcuate slots to provide for controlled arcuate movement of the faceshield relative to the capping members, said walls of each slot including at least two recesses formed therein facing said spring means, each spring means having a bowed portion cooperating and snap fitting in said recesses as the faceshield is moved relative to the capping members.
Claim 2
Dependent Claim
189 words
A safety helmet visor comprising a curved transparent faceshield having an arcuate slot extending therethrough adjacent to each end thereof, a headband provided with coacting securing means whereby the headband can be detachably mounted on a safety helmet, and a stationary capping member at each end of the faceshield extending from the external surface thereof into the arcuate slots, means securing each of the capping members to the headband to link the faceshield to the headband, the part of each capping member which extends into the arcuate slot comprising a rib extending substantially lengthwise of the arcuate slot and terminating at its ends in a pair of cam portions engaging with the walls of the arcuate slot, spring means being positioned between each of the ribs and a wall of each of the arcuate slots to provide for controlled arcuate movement of the faceshield relative to the capping members, said walls of each slot including at least two recesses formed therein facing said spring means, each spring means having a bowed portion cooperating and snap fitting in said recesses as the faceshield is moved relative to the capping members.
Claim 3
Dependent Claim
17 words
A safety helmet visor as claimed in claim 1, wherein each spring means is a leaf spring.
Claim 4
Dependent Claim
33 words
A safety helmet visor as claimed in claim 1, in which each capping member comprises a disc-like element having said rib projecting from one side thereof substantially along a diameter of the disc.
Claim 5
Dependent Claim
33 words
A safety helmet visor as claimed in claim 1, in which on each capping member said cam portions comprise a pair of cylindrical studs and the rib is a substantially linear rib therebetween.
Claim 6
Dependent Claim
30 words
A safety helmet visor as claimed in claim 4, in which the axes of said studs lie on a line to one side of the central plane of the rib.
Claim 7
Dependent Claim
40 words
A safety helmet visor as claimed in claim 1, which includes a spacer of a synthetic plastics material between the headband and the faceshield in the region of each capping member, with the capping member ribs abutting the respective spacers.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |