US3962783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trimming unit
Assignee: US Philips Corp
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Filing: 1975-03-27
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Granted: 1976-06-15
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Expires: 1995-03-27
Abstract
Abstract A trimming unit with stationary and axially movable cutters, and a coupling member which drives the movable cutter, and helical springs disposed at either side of the coupling member for urging the cutters against each other, and for urging the movable cutter to return to its neutral position.
Inventors
- 👤 Albertus Pieter Rentema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:35
CPC Classifications
B; B26; B26B; B26B19/00; B26B19/02; B26B19/04; B26B19/10; B26B19/102
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
241 words
In an electric shaver including a housing, an electric motor with a reciprocating armature in said housing, and a shaving head with a shaving cutter therein coupled to and driven by said armature, the improvement in combination therewith of a trimming unit comprising: a frame slidably mounted to said housing, a pair of stationary and movable blades removably mounted on said frame, said blades each having a row of teeth which cooperate in cutting action, a spindle carried by the frame, coupling means comprising a coupling member axially and pivotally movable on said spindle, a first coupling element on said member for engaging said armature, a second coupling element on said member for engaging said movable blade, said frame being slidable between its inactive position wherein said first coupling element is spaced from said armature and its active position wherein said first coupling element is engaged to said armature, said coupling member being pivotable between closed position wherein its second coupling element engages the movable blade, and open position wherein said coupling member is pivoted away from said movable blade allowing easy removal of said two blades from said frame, and helical spring means around said spindle and engaging said frame and also engaging said coupling member, said spring means resiliently urging said coupling member into its closed position and against said movable blade, which is thereby resiliently urged against said stationary blade when said frame is in its active position.
Claim 2
Dependent Claim
241 words
In an electric shaver including a housing, an electric motor with a reciprocating armature in said housing, and a shaving head with a shaving cutter therein coupled to and driven by said armature, the improvement in combination therewith of a trimming unit comprising: a frame slidably mounted to said housing, a pair of stationary and movable blades removably mounted on said frame, said blades each having a row of teeth which cooperate in cutting action, a spindle carried by the frame, coupling means comprising a coupling member axially and pivotally movable on said spindle, a first coupling element on said member for engaging said armature, a second coupling element on said member for engaging said movable blade, said frame being slidable between its inactive position wherein said first coupling element is spaced from said armature and its active position wherein said first coupling element is engaged to said armature, said coupling member being pivotable between closed position wherein its second coupling element engages the movable blade, and open position wherein said coupling member is pivoted away from said movable blade allowing easy removal of said two blades from said frame, and helical spring means around said spindle and engaging said frame and also engaging said coupling member, said spring means resiliently urging said coupling member into its closed position and against said movable blade, which is thereby resiliently urged against said stationary blade when said frame is in its active position.
Claim 3
Dependent Claim
70 words
Apparatus according to claim 1 wherein said spring means comprises a pair of helical springs axially spaced apart on said spindle with said coupling member positioned intermediate and engaging said springs, said coupling member has a neutral axial position on said spindle, said coupling member is reciprocated axially from said neutral position by said armature, and said springs resiliently urge said member to return to its neutral position when reciprocated.
Claim 4
Dependent Claim
43 words
Apparatus according to claim 1 wherein said trimming unit is substantially within said housing when said frame thereof is in its inactive position, and said teeth of said blades extend out of said housing when said frame is moved to its active position.
Claim 5
Dependent Claim
40 words
Apparatus according to claim 2 wherein said helical springs each have opposite end parts which extend transversely of the spring axis, one extension of each spring engaging said frame, and the other extension of each spring engaging said coupling member.
Claim 6
Dependent Claim
28 words
Apparatus according to claim 4 wherein said coupling member comprises V-shaped recesses and said springs engage said coupling member by said extension thereof being positioned in said recesses.
Claim 7
Dependent Claim
235 words
In an electric shaver including a housing, an electric motor with a reciprocating armature in said housing, and a shaving head with a shaving cutter therein coupled to and driven by said armature, the improvement in combination therewith of a trimming unit comprising: a frame movably mounted to said housing, a pair of stationary and movable blades removably mounted on said frame, said blades each having a row of teeth which cooperate in cutting action, a spindle carried by the frame, coupling means comprising a coupling member axially and pivotally movable on said spindle, a first coupling element on said member for engaging said armature, a second coupling element on said member for engaging said movable blade, said frame being movable between its inactive position wherein said first coupling element is spaced from said armature and its active position wherein said first coupling element is engaged to said armature, said coupling member being pivotable between closed position wherein its second coupling element engages the movable blade, and open position wherein said coupling member is pivoted away from said movable blade allowing easy removal of said two blades from said frame, and spring means engaging said frame and engaging said coupling member, said spring means resiliently urging said coupling member into its closed position and against said movable blade, which is thereby resiliently urged against said stationary blade when said frame is in its active position.
Claim 8
Dependent Claim
235 words
In an electric shaver including a housing, an electric motor with a reciprocating armature in said housing, and a shaving head with a shaving cutter therein coupled to and driven by said armature, the improvement in combination therewith of a trimming unit comprising: a frame movably mounted to said housing, a pair of stationary and movable blades removably mounted on said frame, said blades each having a row of teeth which cooperate in cutting action, a spindle carried by the frame, coupling means comprising a coupling member axially and pivotally movable on said spindle, a first coupling element on said member for engaging said armature, a second coupling element on said member for engaging said movable blade, said frame being movable between its inactive position wherein said first coupling element is spaced from said armature and its active position wherein said first coupling element is engaged to said armature, said coupling member being pivotable between closed position wherein its second coupling element engages the movable blade, and open position wherein said coupling member is pivoted away from said movable blade allowing easy removal of said two blades from said frame, and spring means engaging said frame and engaging said coupling member, said spring means resiliently urging said coupling member into its closed position and against said movable blade, which is thereby resiliently urged against said stationary blade when said frame is in its active position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |