Patent US3911573A successfully refreshed from Google Patents.
US3911573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry shaver
Assignee: Robert Krups GmbH and Co KG
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Filing: 1973-09-25
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Granted: 1975-10-14
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Expires: 1993-09-25
Abstract
Abstract A dry shaver casing is provided with a shearhead which includes a set of cutter blades and a carrier for the same. An oscillatable projection extends from the casing and is provided with an outer recess in its periphery, and a sleeve mounted on the carrier surrounds the projection and has at least one springy portion extending inwardly of the interior cross-section of the sleeve and received with a snap action in the recess of the projection.
Inventors
- 👤 Klaus Limberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:21
CPC Classifications
B; B26; B26B; B26B19/00; B26B19/02; B26B19/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
236 words
In a dry shaver, a combination comprising a casing; a shearhead including a set of cutter blades and a carrier therefor; an oscillatable drive projection extending from said casing and having a free end and an outer circumferential surface provided at diametrally opposite sides with two recesses, each of said recesses having a planar surface portion which is substantially parallel to the other planar surface portion, said planar surface portions being spaced from said free end of said drive projection and inwardly recessed from the rest of said circumferential surface; a sleeve mounted on said carrier and having an axial end and a wall portion extending axially from said axial end and having a radially projecting portion, said sleeve being provided with a central passage partially bounded by said wall portion and adapted to accommodate said drive projection; and an annular spring element mounted on said sleeve and having a section which is located under said radially projecting portion, and a pair of additional sections which extend into said central passage of said sleeve adjacent said axial end thereof and which resiliently yieldably abut against said two planar surface portions when said drive projection is accommodated in said passage so as to connect said sleeve to said drive projection but which are adapted to disengage said planar surface portions and to snap out of said recesses when a predetermined axial pull is exerted on said sleeve.
Claim 2
Dependent Claim
236 words
In a dry shaver, a combination comprising a casing; a shearhead including a set of cutter blades and a carrier therefor; an oscillatable drive projection extending from said casing and having a free end and an outer circumferential surface provided at diametrally opposite sides with two recesses, each of said recesses having a planar surface portion which is substantially parallel to the other planar surface portion, said planar surface portions being spaced from said free end of said drive projection and inwardly recessed from the rest of said circumferential surface; a sleeve mounted on said carrier and having an axial end and a wall portion extending axially from said axial end and having a radially projecting portion, said sleeve being provided with a central passage partially bounded by said wall portion and adapted to accommodate said drive projection; and an annular spring element mounted on said sleeve and having a section which is located under said radially projecting portion, and a pair of additional sections which extend into said central passage of said sleeve adjacent said axial end thereof and which resiliently yieldably abut against said two planar surface portions when said drive projection is accommodated in said passage so as to connect said sleeve to said drive projection but which are adapted to disengage said planar surface portions and to snap out of said recesses when a predetermined axial pull is exerted on said sleeve.
Claim 3
Dependent Claim
41 words
A combination as defined in claim 1, wherein said drive projection is tubular and has an open end facing said carrier; and further comprising a stud projecting from said carrier within the confines of said sleeve and into said open end.
Claim 4
Dependent Claim
35 words
A combination as defined in claim 2, and further comprising biasing means accommodated in said tubular drive projection and acting on said stud so as to urge said carrier axially away from said drive projection.
Claim 5
Dependent Claim
78 words
A combination as defined in claim 1, wherein said circumferential surface of said drive projection is formed in the region of said free end with two pairs of chamfered surfaces, one of the two surfaces of each pair partially bounding the respective recess, and the other being located at said free end, said chamfered surfaces being adapted to engage said additional sections of said spring element so as to snap the same in and out of said recesses.
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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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |