Patent US3795919A successfully refreshed from Google Patents.
US3795919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of joining a hearing protector and a protective helmet and device for applying same
Assignee: Individual
•
Filing: 1972-06-21
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Granted: 1974-03-12
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Expires: 1992-06-21
Abstract
Abstract Method of joining a hearing protector and a protective helmet wherein the yoke part between the earcup and the helmet has been made of a leaf spring, which has been attached to the helmet or to an intermediate part on same either integrally or turnably in a longitudinal vertical plane for the purpose of turning the earcups up into a position at rest, and which comprises an arrangement for spring force adjustment, characterized in that the upper end of the leaf spring has been shaped to be a spiral resembilng a watch spring and that adjustment of the spring tension has been arranged to take place by turning the centre shaft of the spiral or the device serving this function.
Inventors
- 👤 Y Aho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:41
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/10; H04R1/1058; A; A42; A42B; A42B3/00; A42B3/04; A42B3/16; A42B3/166; H04R1/1008; H04R1/1066
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A tension adjusting device for an ear protector mounted on a helmet comprising a leaf spring element fixed at one end to the ear protector for urging the ear protector against the head, the opposite end of said spring element having a spiral portion with the extreme end portion of said opposite end located at the center of said spiral and with the axis of said spiral portion transverse to the longitudinal plane of said leaf spring, mounting means associated with the helmet, means mounted on said mounting means and secured to the inner central end of the spiral portion of said spring for turning the inner end about its axis to vary the tension of said spring to thus increase or decrease the pressure of the ear protector against the head.
Claim 2
Dependent Claim
132 words
A tension adjusting device for an ear protector mounted on a helmet comprising a leaf spring element fixed at one end to the ear protector for urging the ear protector against the head, the opposite end of said spring element having a spiral portion with the extreme end portion of said opposite end located at the center of said spiral and with the axis of said spiral portion transverse to the longitudinal plane of said leaf spring, mounting means associated with the helmet, means mounted on said mounting means and secured to the inner central end of the spiral portion of said spring for turning the inner end about its axis to vary the tension of said spring to thus increase or decrease the pressure of the ear protector against the head.
Claim 3
Dependent Claim
59 words
A device as claimed in claim 1 wherein the means for turning the inner end of the spiral portion of said spring comprises a shaft rotatably mounted on said mounting means, the inner end of the spiral portion of said spring being fixed to said shaft and means for rotating said shaft to vary the tension of said spring.
Claim 4
Dependent Claim
57 words
A device as claimed in claim 2 wherein the means for turning said shaft comprises an adjustment arm fixed to and extending radially from said shaft and screw means mounted on said mounting means for engaging the outer end of said radial arm for turning said shaft about its axis to vary the tension of said spring.
Claim 5
Dependent Claim
81 words
A device as claimed in claim 1 wherein the means for turning the inner enD of the spiral portion of said spring comprises an adjustment arm fixed to the inner end of the spiral portion of said spring and extending substantially radially of said spiral portion and screw means mounted on said mounting means for engaging the outer end of said adjustment arm for rotating said arm about the axis of the spiral portion to vary the tension of said spring.
Claim 6
Dependent Claim
68 words
A device as claimed in claim 4 wherein the inner end of the spiral portion of said spring is wider than the remainder of the spiral portion and extends laterally therefrom and said adjustment arm comprises a U-shaped element, the ends of the legs of which are secured to the inner widened portion of the spiral portion and said screw means engages the base of the U-shaped element.
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |