US3898700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ear protecting device for safety caps
Assignee: MSA Safety Inc
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Filing: 1974-06-26
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Granted: 1975-08-12
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Expires: 1994-06-26
Abstract
Abstract A band that is adapted to surround the crown of a safety cap carries a pair of brackets at its opposite sides, which are provided with downwardly extending hooks to hook under the edge of the cap. Each of the brackets has an opening through it above the band, with the axis of the opening extending radially of the band. Projecting outwardly from the bracket around its opening is a cylindrical flange that extends through a hole in one end of a spring arm that carries an ear cover at its opposite end. A lug projects radially from the outer end of the flange and overlaps the arm to hold it on the flange, but the wall of the hole through the arm has a notch in it to enable the arm to be slipped off the flange after the arm has been rotated to align the notch with the lug. Bolts may be inserted in the bracket openings and provided with nuts on their outer ends for clamping a face shield against the outer ends of the bracket flanges.
Inventors
- 👤 Ellison L Davison
- 👤 Leo D Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:03
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/16; A42B3/166
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
184 words
An ear protecting device for mounting on a safety cap having a brim, said device comprising a band adapted to surround the crown of such a cap, a pair of brackets mounted on the band at opposite sides thereof and provided with downwardly extending hooks for hooking under the edge of the brim, each of said brackets having an opening therethrough above said band, the axis of the opening extending substantially radially of the band, a cylindrical flange projecting outwardly from the bracket around said opening, a pair of spring arms for supporting ear covers, each arm having a hole through one end receiving one of said flanges, an ear cover carried by the other end of the arm, and a retaining lug projecting radially from the outer end portion of each cylindrical flange and overlapping the arm supported by the flange to hold it thereon, the wall of said arm hole being provided with a radial notch to enable the arm to be slipped off said flange after the arm has been rotated on the flange to align the notch with said lug.
Claim 2
Dependent Claim
184 words
An ear protecting device for mounting on a safety cap having a brim, said device comprising a band adapted to surround the crown of such a cap, a pair of brackets mounted on the band at opposite sides thereof and provided with downwardly extending hooks for hooking under the edge of the brim, each of said brackets having an opening therethrough above said band, the axis of the opening extending substantially radially of the band, a cylindrical flange projecting outwardly from the bracket around said opening, a pair of spring arms for supporting ear covers, each arm having a hole through one end receiving one of said flanges, an ear cover carried by the other end of the arm, and a retaining lug projecting radially from the outer end portion of each cylindrical flange and overlapping the arm supported by the flange to hold it thereon, the wall of said arm hole being provided with a radial notch to enable the arm to be slipped off said flange after the arm has been rotated on the flange to align the notch with said lug.
Claim 3
Dependent Claim
52 words
An ear protecting device according to claim 1, in which said lugs are at the bottom of said cylindrical flanges, and said notches are at the top of said arm holes, whereby the lower ends of the arms must be swung up above the brackets to align the notches with said lugs.
Claim 4
Dependent Claim
99 words
An ear protecting device according to claim 1, in which each of said arms is a flat resilient strip having an upper portion substantially perpendicular to the axis of the cylindrical flange supporting it, and a lower portion normally sloping downwardly and inwardly from the lower end of said upper portion aNd tapered downwardly in cross section, each of said ear covers having a headed retaining pin projecting from its back, and said sloping lower portion of each arm being provided with a central longitudinal slot for slidably and rotatably receiving the retaining pin on the adjoining ear cover.
Claim 5
Dependent Claim
27 words
An ear protecting device according to claim 3, in which said downwardly sloping portion of each arm tapers both in thickness and width toward its lower end.
Claim 6
Dependent Claim
41 words
An ear protecting device according to claim 4, in which the lower end portion of each arm has a uniform thickness and width that is substantially the same as the thickness and width of the lower end of its tapered portion.
Claim 7
Dependent Claim
62 words
An ear protecting device according to claim 1, including bolts extending through said bracket openings and having heads at the inner ends of the openings, the bolts being adapted to extend through holes in the opposite sides of a face shield, and nuts on the outer ends of the bolts for clamping the shield against the outer ends of the said flanges.
Claim 8
Dependent Claim
39 words
An ear protecting device according to claim 6, including resilient washers on said bolts for compression between the outer surface of a face shield and the inner ends of the adjoining nuts to press the shield against said flanges.
Claim 9
Dependent Claim
122 words
An ear protecting device for mounting on a safety cap, comprising a pair of spring arms having upper ends formed for connection to the opposite sides of a safety cap, said arms being flat resilient strips having substantially parallel upper portions and lower portions normally sloping downwardly toward each other from the lower ends of said upper portions, said downwardly sloping portion of each arm tapering in thickness and width toward its lower end, and an ear cover carried by the lower end of each arm and having a headed retaining pin projecting from its back, the sloping lower portion of each arm being provided with a central longitudinal slot slidably and rotatably receiving the retaining pin on the adjoining ear cover.
Claim 10
Dependent Claim
122 words
An ear protecting device for mounting on a safety cap, comprising a pair of spring arms having upper ends formed for connection to the opposite sides of a safety cap, said arms being flat resilient strips having substantially parallel upper portions and lower portions normally sloping downwardly toward each other from the lower ends of said upper portions, said downwardly sloping portion of each arm tapering in thickness and width toward its lower end, and an ear cover carried by the lower end of each arm and having a headed retaining pin projecting from its back, the sloping lower portion of each arm being provided with a central longitudinal slot slidably and rotatably receiving the retaining pin on the adjoining ear cover.
Claim 11
Dependent Claim
40 words
An ear-protecting device according to claim 8, in which the lower end portion of each arm has a uniform thickness and width that is substantially the same as the thickness and width of the lower end of its tapered portion.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |