US4854043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible razor head
Assignee: Warner Lambert Co LLC
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Filing: 1987-10-30
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Granted: 1989-08-08
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Expires: 2007-10-30
Abstract
Abstract According to this invention a flexible razor head is provided which features a flexible cap and blade support portion with the blade support portion featuring a segmented guard bar with the spaces separating the segment correlating to the spaces or areas of reduced thickness in the cap. Corrugations present in the blade support portions enable the blade support portion to lengthen in response to shaving forces.
Inventors
- 👤 Evan N. Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:39
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/08; B26B21/10; B26B21/40; B26B21/4012; B26B21/4018; B26B21/4025; B26B21/4068
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
162 words
A flexible razor head comprising in combination: (a) a cap having spaced areas of reduced thickness positioned across its length; (b) pin means extending downward from a position near each longitudinal underside and center of said cap for assembly of said razor head; (c) a blade support positioned beneath said cap providing a planar blade support having; (i) a segmented guard bar extending outwardly therefrom, the spacing between said segments aligned with the areas of reduced thickness of said cap; (ii) pin receiving means positioned below said pin means; said blade support positions corrugated between said pin receiving means to provide an expanded length when subjected to downward force; and (d) a blade package including at least one blade with pin receiving holes greater in area than the cross-sectional area of said pin means when said head is in its unstressed conditions positioned between said cap and said blade support portion, said blade package having at least 15% to 30% open area.
Claim 2
Dependent Claim
162 words
A flexible razor head comprising in combination: (a) a cap having spaced areas of reduced thickness positioned across its length; (b) pin means extending downward from a position near each longitudinal underside and center of said cap for assembly of said razor head; (c) a blade support positioned beneath said cap providing a planar blade support having; (i) a segmented guard bar extending outwardly therefrom, the spacing between said segments aligned with the areas of reduced thickness of said cap; (ii) pin receiving means positioned below said pin means; said blade support positions corrugated between said pin receiving means to provide an expanded length when subjected to downward force; and (d) a blade package including at least one blade with pin receiving holes greater in area than the cross-sectional area of said pin means when said head is in its unstressed conditions positioned between said cap and said blade support portion, said blade package having at least 15% to 30% open area.
Claim 3
Dependent Claim
171 words
A flexible razor head comprising in combination: (a) a cap having spaced areas of reduced thickness positioned across its length; (b) pin means extending downward from a position near each longitudinal underside and center of said cap for assembly of said razor head; (c) a blade support positioned beneath said cap providing a planar blade support having; (i) a segmented guard bar extending outwardly therefrom, the spacing between said segments aligned with the areas of reduced thickness of said cap; (ii) pin receiving means positioned below said pin means; said blade support positions corrugated between said pin receiving means to provide an expanded length when subjected to downward force; and (d) a blade package including at least one blade with pin receiving holes greater in area than the cross-sectional area of said pin means when said head is in its unstressed conditions positioned between said cap and said blade support portion, wherein said flexibility is defined by a force between 45 and 60 gms. to obtain a deflection of 0.50 inches.
Claim 4
Dependent Claim
171 words
A flexible razor head comprising in combination: (a) a cap having spaced areas of reduced thickness positioned across its length; (b) pin means extending downward from a position near each longitudinal underside and center of said cap for assembly of said razor head; (c) a blade support positioned beneath said cap providing a planar blade support having; (i) a segmented guard bar extending outwardly therefrom, the spacing between said segments aligned with the areas of reduced thickness of said cap; (ii) pin receiving means positioned below said pin means; said blade support positions corrugated between said pin receiving means to provide an expanded length when subjected to downward force; and (d) a blade package including at least one blade with pin receiving holes greater in area than the cross-sectional area of said pin means when said head is in its unstressed conditions positioned between said cap and said blade support portion, wherein said flexibility is defined by a force between 45 and 60 gms. to obtain a deflection of 0.50 inches.
Claim 5
Dependent Claim
20 words
The razor head of claim 1 wherein the seat blade has an open area of about 25 to about 30%.
Claim 6
Dependent Claim
31 words
The flexible razor head of claims 1, 2 or 3 wherein between about 15 and 30% of the gram force needed to define the flexibility is contributed by the blade package.
References Cited (Backward Citations)
US4459744A
Cited
US4443939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |