US3720956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Face shield
Assignee: Bullard Co
•
Filing: 1971-05-19
•
Granted: 1973-03-20
•
Expires: 1991-05-19
Abstract
Abstract A detent joint for pivotally securing a face shield holder to a stationary head gear. The joint is constructed of a pair of identical resilient discs secured to the holder and the head gear, respectively, pivotable about a common pin, and firmly held in mutual contact by thrust shoulders of the pin. The discs include a plurality of coacting detents that are equally spaced from each other and from the pivot axis so that upon pivotal movement of the face shield holder the detent and depressions intermittently register and maintain the face shield in a plurality of angularly spaced positions.
Inventors
- 👤 H Raschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:00
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/18; A42B3/22; A42B3/225
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
180 words
A facE shield for a head gear permitting pivotal movement of the shield for covering and uncovering the wearer''s face, the shield comprising: a first rail for engagement with the head gear, means for retaining the rail to the head gear, a pivot member rigidly secured to the rail and including a thin, flexible disc, a shield holder, a second member substantially identical to the first mentioned member rigidly secured to the holder and including another thin, flexible, disc, a pin extending through the discs, means securing the discs to each other, and permitting relative pivotal movements of the discs about the pin and preventing relative axial movement of the discs, the discs including a plurality of detents facing in like directions and equally radially spaced from the pin axis for intermittent mutual engagement of the detents during relative pivotal movements of the discs and the rail and holder to index the rail and the holder at predetermined positions so that the face shield may be raised from over and lowered over the wearer''s face and retained in predetermined positions.
Claim 2
Dependent Claim
180 words
A facE shield for a head gear permitting pivotal movement of the shield for covering and uncovering the wearer''s face, the shield comprising: a first rail for engagement with the head gear, means for retaining the rail to the head gear, a pivot member rigidly secured to the rail and including a thin, flexible disc, a shield holder, a second member substantially identical to the first mentioned member rigidly secured to the holder and including another thin, flexible, disc, a pin extending through the discs, means securing the discs to each other, and permitting relative pivotal movements of the discs about the pin and preventing relative axial movement of the discs, the discs including a plurality of detents facing in like directions and equally radially spaced from the pin axis for intermittent mutual engagement of the detents during relative pivotal movements of the discs and the rail and holder to index the rail and the holder at predetermined positions so that the face shield may be raised from over and lowered over the wearer''s face and retained in predetermined positions.
Claim 3
Dependent Claim
42 words
A face shield according to claim 1 including a sufficient number of detents which are spaced to permit the positioning of the face shield at points intermediate an essentially vertical, face covering position and an inclined or generally horizontal, face uncovering position.
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |