Patent FR671417A successfully refreshed from Google Patents.
US3712138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depth gauges
Assignee: Individual
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Filing: 1971-02-19
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Granted: 1973-01-23
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Expires: 1991-02-19
Abstract
Abstract A depth gauge is of the type having a cup-like body containing a Bourdon tube, a nipple on the body communicating with the interior of the tube. The body is enclosed in a resilient casing with the nipple passing sealingly through a wall in the casing. That wall is covered by a flexible membrane forming part of the casing, the space between the sall and membrane being filled with an inert liquid which also fills the nipple and bourdon tube. The surrounding pressure, acting on the membrane and through it on the inert liquid, actuates the gauge.
Inventors
- 👤 C Alinari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:41
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/164
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
211 words
A depth gauge comprising a cup-like body containing a manometer an indicating member arranged to be actuated by said manometer and a dial over which the indicating member is adapted to move and including a one piece casing of resilient material entirely covering said body which includes a transparent disc covering the dial and bearing on an annular surface of the body, the body having projecting from the center Of the base of the body a nipple communicating with the interior of the manometer, the one-piece casing being disposed in sealing contact with the disc in the zone of the edge of such disc to hold the disc on said annular surface of said body, the casing including a wall having an aperture through which the nipple extends, the wall being sealed to the base of said body by a securing member coacting with the nipple to clamp the wall around the nipple to the body, the casing further including a flexible membrane one side of which covers the wall through which the nipple extends and defining with that wall an envelope filled with a liquid that enters the nipple to actuate the manometer, the other side of the membrane being directly exposed over its full area to the surrounding atmosphere.
Claim 2
Dependent Claim
211 words
A depth gauge comprising a cup-like body containing a manometer an indicating member arranged to be actuated by said manometer and a dial over which the indicating member is adapted to move and including a one piece casing of resilient material entirely covering said body which includes a transparent disc covering the dial and bearing on an annular surface of the body, the body having projecting from the center Of the base of the body a nipple communicating with the interior of the manometer, the one-piece casing being disposed in sealing contact with the disc in the zone of the edge of such disc to hold the disc on said annular surface of said body, the casing including a wall having an aperture through which the nipple extends, the wall being sealed to the base of said body by a securing member coacting with the nipple to clamp the wall around the nipple to the body, the casing further including a flexible membrane one side of which covers the wall through which the nipple extends and defining with that wall an envelope filled with a liquid that enters the nipple to actuate the manometer, the other side of the membrane being directly exposed over its full area to the surrounding atmosphere.
Claim 3
Dependent Claim
34 words
The depth gauge of claim 1 in which the transparent disc has a groove on its edge surface between its sides, the casing having a radially inward annular ridge that seats in such groove.
Claim 4
Dependent Claim
55 words
The depth gauge of claim 2 in which a retaining ring with a cylindrical skirt is fitted under pressure over the casing in the zone where the casing covers the transparent disc, the skirt of the ring covering the full thickness of the disc and a portion of the adjoining surface of the cup-like body.
Claim 5
Dependent Claim
67 words
The depth gauge of claim 1 in which the securing member is a threaded nut and the nipple is threaded to receive the nut, the cup-like body having an annular ridge surrounding the nipple, and the wall of the resilient casing through which the nipple extends having a groove accommodating the ridge, the securing nut bearing on the casing in the zone of such rib and groove.
Claim 6
Dependent Claim
38 words
The depth gauge of claim 1, including a hole in the thickness of the transparent disc, the hole communicating with the space in the cup-like body surrounding the manometer, and including a removable member sealingly closing such hole.
Claim 7
Dependent Claim
36 words
The depth gauge of claim 1, in which the nipple has on its outermost end a groove to permit free passage of the liquid in the envelope even when the membrane is pressed against such end.
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |