US4000520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Headgear support system
Assignee: Arthur D Little Inc
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Filing: 1975-03-21
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Granted: 1977-01-04
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Expires: 1995-03-21
Abstract
Abstract Described is an improved headgear support of the internal suspension system type for supporting the head in spaced relation within a rigid headpiece. The improvement comprises an elongated nape strap disposed adjacent the rear portion of the headpiece for contacting the nape of the wearer's neck. Each end of the nape strap is disposed adjacent respective opposite sides of the headpiece. Means are provided for tensioning the nape strap and for locking the nape strap in a tensioned state so that the wearer's head can be locked within the headpiece between the suspension and the nape strap. In one embodiment of the invention, the tensioning and locking means comprises a lever arm-ratchet bar assembly and in another embodiment, the tensioning and locking means comprises a spool assembly.
Inventors
- 👤 Noel A. Svendsen
- 👤 Willard G. Sylvester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:30
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/10; A42B3/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
150 words
In a rigid headpiece having an internal suspension for supporting the headpiece in spaced relation to a wearer's head the improvement comprising: an elongated nape strap disposed adjacent the rear portion of said headpiece for contacting the nape of the wearer's neck, the ends of said strap being disposed adjacent respective sides of said headpiece; and means coupling at least one end of said nape strap to a corresponding side of said headpiece, and comprising variable tension means including at least one lever arm cooperative with a ratchet bar and movable between a first position wherein said nape strap is tensioned and locked in a tensioned state so that said wearer's head can be locked within said headpiece between said suspension and said nape strap and a second position wherein said nape strap is relaxed so that said wearer's head can be easily positioned in and removed from said suspension.
Claim 2
Dependent Claim
150 words
In a rigid headpiece having an internal suspension for supporting the headpiece in spaced relation to a wearer's head the improvement comprising: an elongated nape strap disposed adjacent the rear portion of said headpiece for contacting the nape of the wearer's neck, the ends of said strap being disposed adjacent respective sides of said headpiece; and means coupling at least one end of said nape strap to a corresponding side of said headpiece, and comprising variable tension means including at least one lever arm cooperative with a ratchet bar and movable between a first position wherein said nape strap is tensioned and locked in a tensioned state so that said wearer's head can be locked within said headpiece between said suspension and said nape strap and a second position wherein said nape strap is relaxed so that said wearer's head can be easily positioned in and removed from said suspension.
Claim 3
Dependent Claim
65 words
In a headpiece according to claim 1, wherein said lever arm is connected at one end to the inside of said headpiece and is pivotally movable about said one end between said first and second positions, and wherein said at least one end of said nape strap is coupled to said lever arm at a point spaced from said one end of said lever arm.
Claim 4
Dependent Claim
29 words
In a headpiece according to claim 2, wherein said lever arm and said ratchet bar include interlocking means for locking said lever arm in a plurality of predetermined positions.
Claim 5
Dependent Claim
37 words
In a headpiece according to claim 3, wherein said interlocking means includes a ratchet tooth provided on said lever arm, said tooth being engagable with a plurality of spaced apart notched recesses provided in said ratchet bar.
Claim 6
Dependent Claim
88 words
In a headpiece in accordance with claim 1, wherein said variable tension means comprises a pair of lever arms, each being connected at one of its ends to the inside of said headpiece at a respective side thereof and pivotally movable about said one end between said first and second positions, each of said arms being cooperative with a corresponding ratchet bar, wherein each end of said nape strap is coupled to a corresponding lever arm at a point spaced from said one end of said lever arm.
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) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |