US6131287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Razor cartridge with dimpled blade guard
Assignee: American Safety Razor Co
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Filing: 1999-05-25
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Granted: 2000-10-17
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Expires: 2019-05-25
Abstract
Abstract In order to improve adhesion between the skin and a razor guard provided at the leading edge of a razor cartridge, the guard is provided with a large number of small concavities. These are preferably, but not to limited to hemispherically shaped concavities and are discrete and thus isolated from one another. These concavities can act as suction cups that increase the adhesion between the skin and the guard and thus tension the skin as the razor is drawn thereover. These concavities or dimples can also contain a reserve of shaving preparation for release on multiple passes over the same area.
Inventors
- 👤 Frank H. Prochaska
- 👤 John P. McAllister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:19
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/40; B26B21/4012; B26B21/4018
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
43 words
A razor comprising: a platform for supporting a blade; a blade guard disposed on said platform adjacent a cutting edge the blade, said blade guard having a plurality of uniformly sized, discrete, hemispherically shaped concavities which are spaced from one another, formed therein.
Claim 2
Dependent Claim
43 words
A razor comprising: a platform for supporting a blade; a blade guard disposed on said platform adjacent a cutting edge the blade, said blade guard having a plurality of uniformly sized, discrete, hemispherically shaped concavities which are spaced from one another, formed therein.
Claim 3
Dependent Claim
74 words
A razor comprising: a platform for supporting a blade; a blade guard disposed on said platform adjacent a cutting edge the blade, said blade guard having a plurality of uniformly sized, discrete, hemispherically shaped concavities which are spaced from one another, formed therein, and wherein the hemispherically shaped cavities have a radius (R) of 0.005"-0.025", a depth (D) of 0.005"-0.025", and are separated from one another by a distance or width (W) of 0.005-0.030".
Claim 4
Dependent Claim
74 words
A razor comprising: a platform for supporting a blade; a blade guard disposed on said platform adjacent a cutting edge the blade, said blade guard having a plurality of uniformly sized, discrete, hemispherically shaped concavities which are spaced from one another, formed therein, and wherein the hemispherically shaped cavities have a radius (R) of 0.005"-0.025", a depth (D) of 0.005"-0.025", and are separated from one another by a distance or width (W) of 0.005-0.030".
Claim 5
Dependent Claim
17 words
A razor as set forth in claim 1, wherein said blade guard is formed of an elastomer.
Claim 6
Dependent Claim
19 words
A razor as set forth in claim 3, wherein said blade guard is formed of an elastomer comprising: TPR®.
Claim 7
Dependent Claim
18 words
A razor as set forth in claim 1, wherein said platform is formed of a plastic comprising: styrene.
Claim 8
Dependent Claim
82 words
A disposable razor cartridge comprising: a bar portion located adjacent a cutting edge of a blade and which precedes the blade during a shaving stroke; and means defining a plurality of discrete uniformly shaped and sized concavities in said portion for producing adhesion between a skin surface and the bar portion, said concavities being hemispherical in shade having a radius (R) of 0.005"-0.025", a depth (D) of 0.005"-0.025", and are separated from one another by a distance or width (W) of 0.005-0.030".
Claim 9
Dependent Claim
82 words
A disposable razor cartridge comprising: a bar portion located adjacent a cutting edge of a blade and which precedes the blade during a shaving stroke; and means defining a plurality of discrete uniformly shaped and sized concavities in said portion for producing adhesion between a skin surface and the bar portion, said concavities being hemispherical in shade having a radius (R) of 0.005"-0.025", a depth (D) of 0.005"-0.025", and are separated from one another by a distance or width (W) of 0.005-0.030".
Claim 10
Dependent Claim
51 words
A disposable razor cartridge as set forth in claim 6, wherein said bar portion is located at a leading edge of a platform on which the blade is supported, said razor cartridge further comprising a cap member which is fastened to the platform in a manner which retains the blade thereon.
Claim 11
Dependent Claim
20 words
A disposable razor cartridge as set forth in claim 7, wherein the platform is formed of a plastic comprising: styrene.
Claim 12
Dependent Claim
26 words
A disposable razor cartridge as set forth in claim 6, wherein said bar portion is formed of an elastomer selected from among the group comprising: TPR®.
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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) | 2003-10-17 | 2004-04-17 | 2004-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-10-17 | 2008-04-17 | 2008-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-10-17 | 2012-04-17 | 2012-10-17 | $7700.00 | Window Closed / Lapsed |