Patent US5883969A successfully refreshed from Google Patents.
Patent US3880157A successfully refreshed from Google Patents.
US3880157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diving helmet assembly
Assignee: Individual
•
Filing: 1974-01-17
•
Granted: 1975-04-29
•
Expires: 1994-01-17
Abstract
Abstract A diving helmet assembly consisting of a transparent plastic helmet having an outwardly extending flange, and a hollow plastic collar which fits around the helmet and engages the flange. The helmet is substantially dome shaped preferably with flat polished portions for clear viewing, and has a hose connection to permit air to be supplied to the helmet when it is immersed in water. The hollow interior of the collar is filled by the user with heavy ballast material such as sand or concrete to counteract the buoyancy of the air filled helmet in water.
Inventors
- 👤 C James Elifritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:42
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/04; B63C11/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A diving helmet assembly which comprises: a. A substantially dome shaped one piece helmet having an open bottom end, said helmet being of fluid-impervious transparent plastic material; b. a collar adapted to fit around said helmet, said collar having a hollow interior and an opening to receive ballast material therein; c. means for removably engaging said collar on said helmet to counteract the buoyancy of the air-filled helmet in water, and d. means on said helmet for connecting a hose to supply air from the exterior to the interior of said helmet when said helmet is submerged in water.
Claim 2
Dependent Claim
99 words
A diving helmet assembly which comprises: a. A substantially dome shaped one piece helmet having an open bottom end, said helmet being of fluid-impervious transparent plastic material; b. a collar adapted to fit around said helmet, said collar having a hollow interior and an opening to receive ballast material therein; c. means for removably engaging said collar on said helmet to counteract the buoyancy of the air-filled helmet in water, and d. means on said helmet for connecting a hose to supply air from the exterior to the interior of said helmet when said helmet is submerged in water.
Claim 3
Dependent Claim
16 words
The diving helmet assembly specified in claim 1 wherein the helmet is cellulose acetate propionate plastic.
Claim 4
Dependent Claim
22 words
The diving helmet assembly specified in claim 2 wherein the helmet has at least one substantially flat transparent portion with polished surfaces.
Claim 5
Dependent Claim
16 words
The diving helmet assembly specified in claim 1 wherein the hollow collar is linear polyethylene plastic.
Claim 6
Dependent Claim
55 words
The diving helmet assembly specified in claim 1 wherein the means for engaging the collar with the helmet comprises a flange formed integrally with the bottom end of said helmet and extending outwardly therefrom, and wherein the collar has a bottom surface with an indentation around the inner edge thereof to engage said helmet flange.
Claim 7
Dependent Claim
42 words
The diving helmet assembly specified in claim 1 wherein the collar has a bottom surface, and wherein the bottom end of said helmet and the bottom surface of said collar are contoured to substantially fit a diver''s shoulders and rest comfortably thereon.
Claim 8
Dependent Claim
23 words
The diving helmet assembly specified in claim 1 wherein said helmet tapers inwardly from the bottom end thereof to the top end thereof.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |