US3972115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety razors
Assignee: Wilkinson Sword Ltd
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Filing: 1974-05-22
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Granted: 1976-08-03
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Expires: 1994-05-22
Abstract
Abstract The invention provides a safety razor comprising a handle, a guard bar adapted to receive a razor blade thereon, and a top cap linked to the guard bar and manually movable into a position in which a razor blade can be trapped between the top cap and the guard bar. A catch secures the top cap on the guard bar, the said catch having a first component on the top cap and a second component which engages with the handle, the first and second components being brought into engagement when the top cap is in the aforesaid position, the handle being movable relative to the guard bar to move the top cap relative to the guard bar for applying a clamping action to a razor blade located therebetween.
Inventors
- 👤 Michael F. Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:27
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/08; B26B21/14; B26B21/30; B26B21/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
281 words
A safety razor comprising a guard bar, said guard bar having two guard surfaces on opposite sides of the guard bar, said guard bar further having an upper razor blade receiving surface and an under surface with a stem portion depending centrally from said under surface, a top cap, said top cap having an upper surface, an under surface and a first position in which the under surface of said top cap covers the upper surface of said guard bar, link means having a first end hinged to said guard bar and a second end hinged to said top cap for swinging said top cap from said first position to a second position in which the upper surface of said guard bar is uncovered, a handle, said handle having a shank at its upper end which shank is rotatably mounted in said guard bar stem portion, a catch for securing said top cap in said first position, said catch having a first component secured to the under surface of said top cap and having a second component within said guard bar stem portion, said first catch component and said second catch component being in catched engagement when said top cap is in said first position, and clamp means including said second catch component being in screw-threaded engagement with said handle and being restrained from rotation by engaging said guard bar stem portion for moving said top cap from said first position to a third position in which said top cap is drawn closer to the upper surface of said guard bar than in said first position upon rotation of said handle in one direction relative to said guard bar stem portion.
Claim 2
Dependent Claim
281 words
A safety razor comprising a guard bar, said guard bar having two guard surfaces on opposite sides of the guard bar, said guard bar further having an upper razor blade receiving surface and an under surface with a stem portion depending centrally from said under surface, a top cap, said top cap having an upper surface, an under surface and a first position in which the under surface of said top cap covers the upper surface of said guard bar, link means having a first end hinged to said guard bar and a second end hinged to said top cap for swinging said top cap from said first position to a second position in which the upper surface of said guard bar is uncovered, a handle, said handle having a shank at its upper end which shank is rotatably mounted in said guard bar stem portion, a catch for securing said top cap in said first position, said catch having a first component secured to the under surface of said top cap and having a second component within said guard bar stem portion, said first catch component and said second catch component being in catched engagement when said top cap is in said first position, and clamp means including said second catch component being in screw-threaded engagement with said handle and being restrained from rotation by engaging said guard bar stem portion for moving said top cap from said first position to a third position in which said top cap is drawn closer to the upper surface of said guard bar than in said first position upon rotation of said handle in one direction relative to said guard bar stem portion.
Claim 3
Dependent Claim
39 words
A safety razor according to claim 1, wherein said first catch component is a generally flat tongue having an aperture therein and said second catch component has a claw adapted to engage in said aperture to secure said catch.
Claim 4
Dependent Claim
41 words
A safety razor according to claim 1, wherein said handle is of non-circular cross-section and is rotated about its longitudinal axis through approximately ninety degrees of arc to move said top cap closer to the upper surface of said guard bar.
Claim 5
Dependent Claim
48 words
A safety razor according to claim 1, wherein a portion of said second catch component is flexible and said razor includes manually operated release means for urging said second catch component out of engagement with said first catch component when said top cap is in said first position.
Claim 6
Dependent Claim
38 words
A safety razor according to claim 4, having blocking means positioned by rotation of said handle in said one direction for preventing operation of said manually operated release means when said top cap is in said third position.
References Cited (Backward Citations)
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US2145860A
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US2582041A
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US3154852A
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US3650027A
Cited
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Cited
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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) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |