US4559953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for detecting changes in shape of a body
Assignee: Pye Electronic Products Ltd
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Filing: 1980-05-08
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Granted: 1985-12-24
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Expires: 2000-05-08
Abstract
Abstract An apparatus for detecting and measuring changes in the shape of a wall of a body includes a detector capsule adapted for attachment to the wall and pneumatically connected to a volume transducer responsive to changes in the internal volume of the apparatus produced by changes in the shape of the wall. The internal volume of the capsule is partially defined by a flexible diaphragm for engagement and complementary movement with the wall. The capsule contains a resiliently deformable material which presses the diaphragm into contact with the wall regardless of the convex or concave shape of the wall.
Inventors
- 👤 Basil M. Wright
- 👤 Christopher A. R. Haire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:10
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/68; A61B5/6887; A61B5/6892; A61B5/103; A61B5/11; A61B5/1126; A61B5/113; A61B5/1135; A61B5/43; A61B5/4306; A61B5/4343; A61B5/4356; G; G01; G01B; G01B13/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
85 words
A detector capsule for being attached to a wall of a body, said capsule comprising at least one flexible diaphragm, one said flexible diaphragm engaging and moving complementarily with both concave and convex distensions of said wall, means for pneumatically connecting said capsule to a transducer responsive to variations in volume in said capsule as a result of changes in said wall, and means including resiliently deformable material located within said capsule for constantly urging said one diaphragm into virtually complete engagement with said wall.
Claim 2
Dependent Claim
85 words
A detector capsule for being attached to a wall of a body, said capsule comprising at least one flexible diaphragm, one said flexible diaphragm engaging and moving complementarily with both concave and convex distensions of said wall, means for pneumatically connecting said capsule to a transducer responsive to variations in volume in said capsule as a result of changes in said wall, and means including resiliently deformable material located within said capsule for constantly urging said one diaphragm into virtually complete engagement with said wall.
Claim 3
Dependent Claim
23 words
A detector capsule according to claim 1, wherein said means including resiliently deformable material is a block of a flexible, open-cell plastics foam.
Claim 4
Dependent Claim
16 words
A detector capsule according to claim 2, wherein said block of plastics foam is polyurethane foam.
Claim 5
Dependent Claim
16 words
A detector capsule according to claim 2, wherein said block of plastics foam is PVC foam.
Claim 6
Dependent Claim
56 words
A detector capsule according to claim 1, wherein said capsule includes a rigid cup-shaped structure having said one diaphragm located across the open end, and said resiliently deformable material is internally located in said structure, and wherein said resiliently deformable material has a thickness exceeding the depth of said cup-shaped structure when in an undeformed state.
Claim 7
Dependent Claim
77 words
A detector capsule according to claim 1, wherein said capsule includes two flexible diaphragms comprising said one diaphragm engaging said wall and a second said diaphragm being coextensive with said one diaphragm and sealingly connected around the periphery thereof, said resiliently deformable material being located internally between said one diaphragm and said second diaphragm, and wherein said capsule is attached to said wall by a band of substantially inextensible material passing at least over said second diaphragm.
Claim 8
Dependent Claim
24 words
A detector capsule according to claim 6, wherein said band is an adhesive tape adhering to said wall outside the periphery of said capsule.
Claim 9
Dependent Claim
20 words
A detector capsule according to claim 6 or claim 7, wherein said band encircles both said capsule and said body.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |