US4281453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaving apparatus
Assignee: US Philips Corp
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Filing: 1979-09-14
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Granted: 1981-08-04
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Expires: 1999-09-14
Abstract
Abstract The disclosure relates to a shaving apparatus having a shear plate with hair entry apertures and a drivable cutting unit with at least one cutting element provided with a cutting edge. Owing to the presence of the shear plate a shaving apparatus of this type does not allow the hairs to be shaved as closely to the skin as a shaving apparatus without such a shear plate, where the cutting element is in direct contact with the skin. In order to eliminate this drawback a construction is proposed in which the cutting element is provided with a hair pulling element which leads in the direction of the driving and which is immobile relative to the cutting element.
Inventors
- 👤 Eppe Bakker
- 👤 Ebbe Boiten
- 👤 Eildert Kingma
- 👤 Gerard J. Lenting
- 👤 Willem S. Wijma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:43
CPC Classifications
B; B26; B26B; B26B19/00; B26B19/14; B26B19/141; B26B19/145; B26B19/38; B26B19/42
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
A shaving apparatus having a shear plate provided with hair entry apertures and a cutting unit associated with and drivable relative to the shear plate; said cutting unit comprising a cutting member, cutting elements extending from said cutting member toward the shear plate, each cutting element being formed with a cutting edge, and hair-pulling elements respectively associated with the cutting elements and positioned in front of said cutting elements in the direction of driving, each hair-pulling element being immobile relative to the associated cutting element and being formed with a hair-contact edge, said hair-contact edge being located at a greater distance from the shear plate than said cutting edge.
Claim 2
Dependent Claim
109 words
A shaving apparatus having a shear plate provided with hair entry apertures and a cutting unit associated with and drivable relative to the shear plate; said cutting unit comprising a cutting member, cutting elements extending from said cutting member toward the shear plate, each cutting element being formed with a cutting edge, and hair-pulling elements respectively associated with the cutting elements and positioned in front of said cutting elements in the direction of driving, each hair-pulling element being immobile relative to the associated cutting element and being formed with a hair-contact edge, said hair-contact edge being located at a greater distance from the shear plate than said cutting edge.
Claim 3
Dependent Claim
21 words
A shaving apparatus according to claim 1, in which each hair-pulling element constitutes an integral portion of its associated cutting element.
Claim 4
Dependent Claim
106 words
A shaving apparatus according to claim 2, in which each hair entry aperture has an elongate edge, and in which the projection of the hair-contact edge of each hair-pulling element on the shear plate encloses an acute angle with the elongate edge of each hair-entry aperture, said acute angle being greater than the friction angle, the hair-contact edge of each hair-pulling element tapering up and away from the shear plate from a point of the hair-contact edge in front of the associated cutting element in the direction of driving to a point of the hair-contact edge trailing the associated cutting element in the direction of driving.
Claim 5
Dependent Claim
38 words
A shaving apparatus according to claim 3, in which the magnitude of the angle between the projection of the hair-contact edge of each hair-pulling element and the elongate edge of each hair entry aperture varies continuously during operation.
Claim 6
Dependent Claim
22 words
A shaving apparatus according to claim 2 or 3, in which each cutting element is provided with a plurality of hair-pulling elements.
Claim 7
Dependent Claim
25 words
A shaving apparatus according to claim 1, in which the cutting unit includes a separate central body, the hair-pulling elements extending from said central body.
Claim 8
Dependent Claim
49 words
A shaving apparatus according to claim 6, in which the cutting elements are integrally formed with the cutting member, and in which the hair-pulling elements are integrally formed with the control body to provide a hair-pulling member, the cutting member and the hair-pulling member being secured to each other.
Claim 9
Dependent Claim
38 words
A shaving apparatus according to claim 1, in which each hair-pulling element is provided with spaced teeth disposed at an acute angle relative to the shear plate, the hair-contact edge being provided on both sides of each tooth.
Claim 10
Dependent Claim
25 words
A shaving apparatus according to claim 8, in which the space between two adjacent teeth has a widened portion near the base of the teeth.
References Cited (Backward Citations)
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US2288162A
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US2817146A
Cited
US3088205A
Cited
US3962784A
Cited
US4044463A
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) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |