US3677087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depth gauges
Assignee: Individual
•
Filing: 1970-12-31
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Granted: 1972-07-18
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Expires: 1990-12-31
Abstract
Abstract A depth gauge comprises a support of elastomeric material formed with an annular groove in which a thick-walled transparent gauge tube sealed at one end and open at its other end for access of water is snap mounted. Visual contrast between the water and air columns in the gauge tube is improved by the provision of a light-reflecting coating on an inclined portion of the support adjacent the groove receiving the gauge tube.
Inventors
- 👤 Carlo Alinari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:42
CPC Classifications
G; G01; G01C; G01C13/00; G01C13/008
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
174 words
Depth gauge of the type comprising a pressure gauge tube of transparent material sealed at one end and open at its other end for access of water which compresses the air within the tube and reaches into the tube by an extent increasing with the plunging depth, thereby indicating by its meniscus the plunging depth reached on a graduated scale associated with the tube, characterized by comprising a resiliently deformable support (1) having attached thereto a strap (10) and formed at the top with an annular groove (2) substantially semicircular in cross-section embracing somewhat more than 180* in said cross-section, a metal panel (12) adapted to interfit with the middle top portion (4,5) of the support and having a dial provided with a graduate scale encircled by an annular channel (14) provided with a blackened bottom adapted to be engaged by the groove (2) in the support (1) and a transparent tube (15) adapted to be engaged by the groove (2) in the support and amounting in thickness to about 1/3 its outer diameter.
Claim 2
Dependent Claim
174 words
Depth gauge of the type comprising a pressure gauge tube of transparent material sealed at one end and open at its other end for access of water which compresses the air within the tube and reaches into the tube by an extent increasing with the plunging depth, thereby indicating by its meniscus the plunging depth reached on a graduated scale associated with the tube, characterized by comprising a resiliently deformable support (1) having attached thereto a strap (10) and formed at the top with an annular groove (2) substantially semicircular in cross-section embracing somewhat more than 180* in said cross-section, a metal panel (12) adapted to interfit with the middle top portion (4,5) of the support and having a dial provided with a graduate scale encircled by an annular channel (14) provided with a blackened bottom adapted to be engaged by the groove (2) in the support (1) and a transparent tube (15) adapted to be engaged by the groove (2) in the support and amounting in thickness to about 1/3 its outer diameter.
Claim 3
Dependent Claim
48 words
Depth gauge as claimed in claim 1, characterized by the fact that the metal panel (12) is engaged by snap action on a projecting middle portion (5) of the support (1) and is formed with a convex, silver-plated top for reflecting light rays towards the transparent tube (15).
Claim 4
Dependent Claim
56 words
Depth gauge as claimed in claim 1, characterized by the provision at opposed ends of the tube (15a,15b) of a plug having an intermediate flange (17) and two opposite pins (18,19) adapted to be forced into the tube portions, respectively, one tube end being provided with a radial bore (20) for establishing communication with the outside.
Claim 5
Dependent Claim
39 words
Depth gauge as claimed in claim 1, characterized by the fact that the support (1) is formed with a rear recess (7) accommodating a strap (10) retained by two pins (9) spanning the two opposite walls of said recess.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |