US3933148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for determining skin sensitivity
Assignee: LOVIDA AG
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Filing: 1974-04-12
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Granted: 1976-01-20
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Expires: 1994-04-12
Abstract
Abstract A device for determining the degree of skin sensitivity on the basis of the persistance of a streak. At least one element is provided which is to be compressed against the action of an elastic system or a spring. The outer end of this pressure element is provided with a surface which is contacted with the skin to enable a standardized pressure to be applied thereto.
Inventors
- 👤 Eugen Wyler
- 👤 Wladimir Tur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:10
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/48; A61B5/4824; A61B5/4827; A61B5/0048; A61B5/0053
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
161 words
A device for determining the degree of skin sensitivity due to the persistence of a scratch trace on the skin surface produced by said device, comprising: a housing having a base surface; at least one pressure element having one end extending into said housing and having a rounded trace producing surface on the other end thereof, said trace producing surface protruding from said housing at said base surface; compressible means within said housing in engagement with said pressure element, having a predetermined spring force, for compressing said at least one pressure element against the skin surface at a constant pressure of 250-500 gm/mm 2 when said trace producing surface is depressed to said base surface, whereby said at least one pressure element is depressable into said housing at a constant pressure and therefore the pressure on the skin surface will be constant, thereby allowing a plurality of scratch traces to be applied to the skin surface at the same surface pressure.
Claim 2
Independent Claim
161 words
A device for determining the degree of skin sensitivity due to the persistence of a scratch trace on the skin surface produced by said device, comprising: a housing having a base surface; at least one pressure element having one end extending into said housing and having a rounded trace producing surface on the other end thereof, said trace producing surface protruding from said housing at said base surface; compressible means within said housing in engagement with said pressure element, having a predetermined spring force, for compressing said at least one pressure element against the skin surface at a constant pressure of 250-500 gm/mm 2 when said trace producing surface is depressed to said base surface, whereby said at least one pressure element is depressable into said housing at a constant pressure and therefore the pressure on the skin surface will be constant, thereby allowing a plurality of scratch traces to be applied to the skin surface at the same surface pressure.
Claim 3
Dependent Claim
23 words
Device according to claim 1, further including an adjusting means connected to said compression means for adjusting the tension of said compression means.
Claim 4
Dependent Claim
33 words
Device according to claim 1, wherein a plurality of pressure elements are provided projecting from said base surface, said elements being tensioned with different spring forces and being provided with similar outer surfaces.
Claim 5
Dependent Claim
33 words
Device according to claim 1, wherein a plurality of pressure elements are provided, projecting from said base surface, said elements being tensioned with the same spring tension and provided with different outer surfaces.
Claim 6
Dependent Claim
46 words
Device according to claim 1, wherein the trace producing surface of the pressure element is in the form of a rod having a diameter of approximately 3 mm and a rounded tip with a radius of 1.5 mm, having a flattened cap 1 mm in diameter.
Claim 7
Dependent Claim
19 words
Device according to claim 5, wherein the trace producing surface of the pressure element is made of a polyamide.
References Cited (Backward Citations)
US1842323A
Cited
US2323925A
Cited
US2704539A
Cited
US3498120A
Cited
US3680545A
Cited
US3618371A
Cited
US3805599A
Cited
US3745989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |