US3639979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry-shaving apparatus
Assignee: US Philips Corp
•
Filing: 1969-09-17
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Granted: 1972-02-08
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Expires: 1989-09-17
Abstract
Abstract This dry-shaving apparatus has a shear plate deflected into a partial toroidal shape, its surface being cooperatively engaged with a movable cutting member and having inner and outer opposing edges. A first restraining member engages and applies a torque to the inner edge while a second member slidingly engages the outer edge of the plate and resists the torque, thereby maintaining the toroidal shape.
Inventors
- 👤 Frans Zuurveen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:26
CPC Classifications
B; B26; B26B; B26B19/00; B26B19/02; B26B19/04; B26B19/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
135 words
A dry shaver comprising: a. a housing, b. a cutting member which has cutting surfaces, and a concentric centering ring, and is rotatably mounted in the housing, c. a shaving head formed of (i) a resilient, shear plate having circular inner and outer edges, a plurality of hair-receiving apertures, and a cutting surface, and (ii) a circular center part to which the inner edge of said plate is fixedly attached, said plate being flexed into a partial toroid shape and disposed with the toroid axis and cutting member axis coincident, the outer edge of the shear plate engaging the housing, and the centering ring rotatably engaging said center part, and d. means for rotating said cutting member and for urging this member toward the shear plate for maintaining their respective cutting surfaces in pressure contact.
Claim 2
Dependent Claim
135 words
A dry shaver comprising: a. a housing, b. a cutting member which has cutting surfaces, and a concentric centering ring, and is rotatably mounted in the housing, c. a shaving head formed of (i) a resilient, shear plate having circular inner and outer edges, a plurality of hair-receiving apertures, and a cutting surface, and (ii) a circular center part to which the inner edge of said plate is fixedly attached, said plate being flexed into a partial toroid shape and disposed with the toroid axis and cutting member axis coincident, the outer edge of the shear plate engaging the housing, and the centering ring rotatably engaging said center part, and d. means for rotating said cutting member and for urging this member toward the shear plate for maintaining their respective cutting surfaces in pressure contact.
Claim 3
Dependent Claim
36 words
A dry shaver as defined in claim 1 wherein said shaving head further comprises an outer ring which is secured to the housing, with the outer edge of the shear plate secured to the outer ring.
Claim 4
Dependent Claim
31 words
A dry shaver as defined in claim 2 wherein said shaving head comprising the center part, the shear plate, and the outer ring forms a subassembly removably attachable to the housing.
Claim 5
Dependent Claim
17 words
A dry shaver as defined in claim 1 wherein said center part is a ring or disc.
Claim 6
Dependent Claim
26 words
A dry shaver as defined in claim 4 wherein at least one of said center part and outer ring components is formed of a synthetic material.
Claim 7
Dependent Claim
34 words
A dry shaver as defined in claim 4 wherein said centering ring is concentrically secured to the cutting member and has a circular part rotatably engaged to said center ring of the shaving head.
Claim 8
Dependent Claim
28 words
A shaver according to claim 1 wherein said means urging the cutting member toward the shear plate, is effective in flexing the plate into said partial toroid shape.
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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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |