US3717032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depth gauge
Assignee: Individual
•
Filing: 1971-03-23
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Granted: 1973-02-20
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Expires: 1991-03-23
Abstract
Abstract A manometer type depth gauge has a curved manometer tube with its open end spaced slightly apart from its closed end; It is received in a groove on the edge of a base member of dark color, being clamped in place by a cover member that is removably attached to the base member. The cover member contacts the tube but leaves part of the tube uncovered to by struck directly by incident light.
Inventors
- 👤 C Alinari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:55
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
The depth gauge comprising a transparent manometer tube closed at one end and open at the other end, said tube being curved so that the ends approach but do not contact each other, a base member having a groove disposed in a dark color edge zone in which said tube is partially received, a cover member having a transparent edge portion with a graduAted scale thereon partially superimposed over said tube, means for detachably securing said cover member to said base member for clamping and securing said tube therebetween and a reflective ring member secured to said base member, said ring member having a lip extending into a groove in said base member.
Claim 2
Dependent Claim
113 words
The depth gauge comprising a transparent manometer tube closed at one end and open at the other end, said tube being curved so that the ends approach but do not contact each other, a base member having a groove disposed in a dark color edge zone in which said tube is partially received, a cover member having a transparent edge portion with a graduAted scale thereon partially superimposed over said tube, means for detachably securing said cover member to said base member for clamping and securing said tube therebetween and a reflective ring member secured to said base member, said ring member having a lip extending into a groove in said base member.
Claim 3
Dependent Claim
113 words
The depth gauge comprising a transparent manometer tube closed at one end and open at the other end, said tube being curved so that the ends approach but do not contact each other, a base member having a groove disposed in a dark color edge zone in which said tube is partially received, a cover member having a transparent edge portion with a graduAted scale thereon partially superimposed over said tube, means for detachably securing said cover member to said base member for clamping and securing said tube therebetween and a reflective ring member secured to said base member, said ring member having a lip extending into a groove in said base member.
Claim 4
Dependent Claim
113 words
The depth gauge comprising a transparent manometer tube closed at one end and open at the other end, said tube being curved so that the ends approach but do not contact each other, a base member having a groove disposed in a dark color edge zone in which said tube is partially received, a cover member having a transparent edge portion with a graduAted scale thereon partially superimposed over said tube, means for detachably securing said cover member to said base member for clamping and securing said tube therebetween and a reflective ring member secured to said base member, said ring member having a lip extending into a groove in said base member.
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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |