Patent US4620072A successfully refreshed from Google Patents.
US4620072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow non-occluding pressure sensor
Assignee: Individual
•
Filing: 1985-04-12
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Granted: 1986-10-28
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Expires: 2005-04-12
Abstract
Abstract A pressure change sensor includes a flexible hollow body to receive pressure changes, an inner body in said flexible hollow body, the inner body being of a size less than and a shape different from the hollow of said hollow body to prevent total occlusion of the hollow body interior under pressure, and a fluid operated switch in fluid communication with the interior of the hollow body responsive to pressure changes applied to the hollow body.
Inventors
- 👤 Norman K. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:31
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/22; H01H3/24; E; E05; E05F; E05F15/00; E05F15/40; E05F15/42; E05F15/47; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
102 words
A pressure change sensor comprising a flexible hollow body located in position to receive pressure changes to be sensed, the ends of the hollow of said body being closed, a fluid operated switch in fluid communication with said hollow for response to pressure changes, and an inner body of a completely solid cross section without any enclosed hollow therein, said inner body being in the hollow of said flexible hollow body, said inner body being of a size less than the hollow of said hollow body and of a shape different from said hollow, to prevent occlusion of said hollow under pressure.
Claim 2
Dependent Claim
102 words
A pressure change sensor comprising a flexible hollow body located in position to receive pressure changes to be sensed, the ends of the hollow of said body being closed, a fluid operated switch in fluid communication with said hollow for response to pressure changes, and an inner body of a completely solid cross section without any enclosed hollow therein, said inner body being in the hollow of said flexible hollow body, said inner body being of a size less than the hollow of said hollow body and of a shape different from said hollow, to prevent occlusion of said hollow under pressure.
Claim 3
Dependent Claim
27 words
A pressure change sensor according to claim 1, said inner body being flexible, for concurrent flexure of said hollow and inner bodies without occlusion of said hollow.
Claim 4
Dependent Claim
35 words
A pressure change sensor according to claim 2, said flexible hollow body being elongate and said hollow extending longitudinally within said hollow body, and said inner body being elongate and extending longitudinally within said hollow.
Claim 5
Dependent Claim
18 words
A pressure change sensor according to claim 3, said hollow being of substantially constant noncircular cross sectional configuration.
Claim 6
Dependent Claim
20 words
A pressure change sensor according to claim 4, said inner body being of substantially constant generally circular cross sectional configuration.
Claim 7
Dependent Claim
22 words
A pressure change sensor according to claim 3, said inner body being substantially co-extensive longitudinally with the hollow of said hollow body.
Claim 8
Dependent Claim
16 words
A pressure change sensor according to claim 3, said inner and hollow bodies being separate bodies.
Claim 9
Dependent Claim
14 words
A pressure change sensor according to claim 7, said inner body comprising a wire.
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) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |