US4409735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety razor
Assignee: Warner Lambert Co LLC
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Filing: 1978-12-06
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Granted: 1983-10-18
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Expires: 1998-12-06
Abstract
Abstract A razor blade assembly which is flexible in at least one bending mode. A seat member of substantially planar shape has an integrally formed guard located transversely along its forward margin. The guard and seat members are formed of a flexible material. A flexible blade having a sharpened edge along a transverse margin is disposed on a surface of the seat member having its edge parallel to and rearwardly located of the guard bar. A cap member of flexible material has a planar surface in contact with the blade and a front margin located rearwardly of the cutting edge. The seat, blade and cap are yieldingly bonded together and freely flexible about an axis parallel to the plane of the blade and perpendicular to the cutting edge.
Inventors
- 👤 Cyril A. Cartwright
- 👤 James S. Emmett
- 👤 Arthur E. Michael
- 👤 Anthony J. Peleckis
- 👤 Ernest M. Symes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:57
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/40; B26B21/4012; B26B21/4031
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
131 words
A razor blade assembly comprising a flexible seat member having a substantially planar surface, a flexible blade having a sharpened cutting edge disposed on the seat member surface, a flexible guard member located forwardly of the cutting edge, a flexible cap member on the blade having a forward margin located rearwardly of the cutting edge, the seat, guard, blade and cap member being yieldingly bonded together and being flexible about an axis parallel to the plane of the blade and perpendicular to its cutting edge wherein said assembly is capable of deflecting substantially arcuately about said axis to a curvature having a radius of above five inches or less in response to a force within the range of about 0.018 to four pounds applied to the longitudinal midpoint of said assembly.
Claim 2
Dependent Claim
131 words
A razor blade assembly comprising a flexible seat member having a substantially planar surface, a flexible blade having a sharpened cutting edge disposed on the seat member surface, a flexible guard member located forwardly of the cutting edge, a flexible cap member on the blade having a forward margin located rearwardly of the cutting edge, the seat, guard, blade and cap member being yieldingly bonded together and being flexible about an axis parallel to the plane of the blade and perpendicular to its cutting edge wherein said assembly is capable of deflecting substantially arcuately about said axis to a curvature having a radius of above five inches or less in response to a force within the range of about 0.018 to four pounds applied to the longitudinal midpoint of said assembly.
Claim 3
Dependent Claim
28 words
The razor blade assembly of claim 1 wherein said force is applied midway between a pair of opposing forces spaced about 1.4 inches apart transversely to said axis.
Claim 4
Dependent Claim
39 words
The razor blade assembly of claim 1 wherein the flexibility thereof about said axis is such that it is capable of substantially conforming to various contours of a human surface being shaved in response to normal human shaving forces.
Claim 5
Dependent Claim
34 words
The assembly of claim 3 wherein the seat member includes a front margin and comprises a series of rib members interconnected by webs, and arrayed orthogonally to the front margin of the seat member.
Claim 6
Dependent Claim
29 words
The assembly of claim 4 wherein the guard bar member is a comb guard bar, the teeth of which are formed by forwardly extending portions of the rib members.
Claim 7
Dependent Claim
23 words
The assembly of claim 4 wherein the assembly is yieldingly bonded with adhesives selected from the group consisting of acrylics, rubbers, and silicones.
Claim 8
Dependent Claim
37 words
The assembly of claim 6 wherein the seat, guard bar and cap members are molded from a flexible polymeric material selected from the group consisting of polyvinyl chloride, polyethylene, ethylene vinyl acetate, silicone, urethane and thermoplastic rubbers.
Claim 9
Dependent Claim
26 words
The assembly of claim 6 comprising a second blade disposed parallel to and rearwardly of the blade, and interposed between the blade and the cap member.
Claim 10
Dependent Claim
12 words
The assembly of claim 8 wherein the second blade is yieldingly bonded.
Claim 11
Dependent Claim
34 words
The assembly of claim 9 wherein the members are bonded by adhesive strips interposed between each of the members, and the assembly includes a spacer member interposed between the blade and the second blade.
Claim 12
Dependent Claim
15 words
The assembly of claim 5 wherein the assembly is integrally molded from a flexible material.
Claim 13
Dependent Claim
34 words
The razor blade assembly of claim 1 wherein said radius of said curvature of said assembly is about five inches or less in response to a said force of about 0.8 pounds or less.
Claim 14
Dependent Claim
32 words
The razor blade assembly of claim 12 wherein said radius of said curvature of said assembly is about five inches in response to a said force of about 0.09 pounds or less.
Claim 15
Dependent Claim
45 words
The razor blade assembly of claim 1 wherein the span, exposure and tangent angle geometries of said blade when said assembly is deflected to have a radius of about five inches or less are substantially the same as when said assembly is normally substantially linear.
References Cited (Backward Citations)
US1383783A
Cited
US1932110A
Cited
US2521481A
Cited
US3262206A
Cited
US3500539A
Cited
US3583262A
Cited
US3587171A
Cited
US3832774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-17 | 1987-04-18 | 1987-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-17 | 1991-04-18 | 1991-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-17 | 1995-04-18 | 1995-10-18 | $7700.00 | Window Closed / Lapsed |