Patent US3748732A successfully refreshed from Google Patents.
US3748732A
Expired / Lapsed
US
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Control unit for electric shaver
Assignee: Philips North America LLC
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Filing: 1971-08-18
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Granted: 1973-07-31
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Expires: 1991-08-18
Abstract
Abstract A control unit for an electric shaver including means for controlling the degree of exposure of the cutting head and means for initiating removal of the cutting head from the razor unit for cleaning purposes. The razor unit preferably includes a pair of cutting heads, a center spacer lying adjacent the inner edges of each cutting head and a pair of positionally adjustable edge guards, one adjacent the outer edge of each head. Each guard is mounted for vertical movement to position the upper surfaces thereof more or less close to the cutting plane of the heads. Edge guard movement is controlled by movement of a control button moving in an arcuate slot, with an integral hinge arrangement connecting the button to a pair of horizontally disposed slides having cam surfaces thereon which engage inclines formed of the lower portions of the edge guide. A cutting head lifter is formed on the control assembly in a position such that movement of the control button to an extreme upward position unlocks the heads from their position of use within the razor and lifts them a short distance to facilitate removal thereof.
Inventors
- 👤 D Frantz
- 👤 D Shortlidge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:25
CPC Classifications
B; B26; B26B; B26B19/00; B26B19/38; B26B19/3853; B26B19/386; B26B19/3886
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
98 words
An electric razor comprising, in combination: a razor body; a shaving head assembly detachably engaged in said body; at least one shaving head edge guard movable in a plane substantially perpendicular to the cutting plane of said shaving head for controlling the shaving characteristic of said head; control means comprising a user-actuated control member movable over a predetermined adjustment range for positioning said edge guard to obtain a desired shaving characteristic; and head ejection means responsive to movement of said control member beyond said predetermined adjustment range for urging said head assembly from engagement with said razor body.
Claim 2
Dependent Claim
98 words
An electric razor comprising, in combination: a razor body; a shaving head assembly detachably engaged in said body; at least one shaving head edge guard movable in a plane substantially perpendicular to the cutting plane of said shaving head for controlling the shaving characteristic of said head; control means comprising a user-actuated control member movable over a predetermined adjustment range for positioning said edge guard to obtain a desired shaving characteristic; and head ejection means responsive to movement of said control member beyond said predetermined adjustment range for urging said head assembly from engagement with said razor body.
Claim 3
Dependent Claim
34 words
An electric razor as defined in claim 1 whErein said control means further comprise a slidably mounted actuator member operatively engaged to said edge guard and movable generally perpendicular to the movement plane thereof.
Claim 4
Dependent Claim
32 words
An electric razor as defined in claim 2 wherein said user-actuated control member is slidably mounted in said razor body for movement generally perpendicular to the movement plane of said actuator member.
Claim 5
Dependent Claim
37 words
An electric razor as defined in claim 3 wherein said head ejection means comprise a surface on said control member for operatively engaging said head assembly when said control member is moved beyond said predetermined control range.
Claim 6
Dependent Claim
45 words
An electric razor as defined in claim 4 wherein said control means further comprise a link member extending between said actuator member and said user-actuated control member, said link member being integrally formed with and of the same material as said actuator and control members.
Claim 7
Dependent Claim
140 words
An electric razor comprising, in combination: a razor body; a shaving head assembly detachably engaged in said body; at least one shaving head edge guard movable in a plane substantially perpendicular to th cutting plane of said shaving head for controlling the shaving characteristic of said head; a slidably mounted actuator member operatively engaged to said edge guard and movable generally perpendicular to the movement plane thereof; means comprising a user-actuator control member slidably mounted in said razor body and movable over a predetermined adjustment range generally perpendicular to the movement plane of said actuator member for positioning said edge guard to obtain a desired shaving characteristic; and means on said control member for operatively engaging said head assembly to urge said assembly from engagement with said razor body when said control member is moved beyond said predetermined adjustment range.
Claim 8
Dependent Claim
140 words
An electric razor comprising, in combination: a razor body; a shaving head assembly detachably engaged in said body; at least one shaving head edge guard movable in a plane substantially perpendicular to th cutting plane of said shaving head for controlling the shaving characteristic of said head; a slidably mounted actuator member operatively engaged to said edge guard and movable generally perpendicular to the movement plane thereof; means comprising a user-actuator control member slidably mounted in said razor body and movable over a predetermined adjustment range generally perpendicular to the movement plane of said actuator member for positioning said edge guard to obtain a desired shaving characteristic; and means on said control member for operatively engaging said head assembly to urge said assembly from engagement with said razor body when said control member is moved beyond said predetermined adjustment range.
Claim 9
Dependent Claim
41 words
An electric razor as defined in claim 6 which further comprises a link member extending between said actuator member and said user-actuator control members, said link being integrally formed with and of the same material as said actuator and control members.
Claim 10
Dependent Claim
195 words
An electric razor unit comprising: a razor body; at least one shaving head assembly received in said body; at least one shaving head edge guard movable in a plane substantially perpendicular to the normal cutting plane of said cutting head between raised, lowered, and intermediate positions; slide means disposed within a channel in said body for movement generally transverse to the movement plane of said edge guard; a manually operable control unit movable between at least first and second positions; a second channel in said body receiving said control unit; a link extending between said control unit and said slide means, said link being integrally formed with and of the same material as said control unit and said slide; an inclined surface in a lower portion of said edge guard and at least one beveled surface on said slide means for cooperative engagement with said inclined surface; and spring means normally urging said edge guard to one of said raised or lowered positions thereof, whereby movement of said control unit within said second channel produces movement of said slide means in another direction within said first channel, thereby causing vertical movement of said edge guard.
Claim 11
Dependent Claim
195 words
An electric razor unit comprising: a razor body; at least one shaving head assembly received in said body; at least one shaving head edge guard movable in a plane substantially perpendicular to the normal cutting plane of said cutting head between raised, lowered, and intermediate positions; slide means disposed within a channel in said body for movement generally transverse to the movement plane of said edge guard; a manually operable control unit movable between at least first and second positions; a second channel in said body receiving said control unit; a link extending between said control unit and said slide means, said link being integrally formed with and of the same material as said control unit and said slide; an inclined surface in a lower portion of said edge guard and at least one beveled surface on said slide means for cooperative engagement with said inclined surface; and spring means normally urging said edge guard to one of said raised or lowered positions thereof, whereby movement of said control unit within said second channel produces movement of said slide means in another direction within said first channel, thereby causing vertical movement of said edge guard.
Claim 12
Dependent Claim
220 words
An electric razor unit comprising: a razor body; at least one shaving head assembly received in said body; at least one shaving head edge guard movable in a plane substantially perpendicular to the normal cutting plane of said cutting head between raised, lowered, and intermediate positions; slide means disposed within a channel in said body for movement generally transverse to the movement plane of said edge guard; a manually operable control unit movable between at least first and second positions; a second channel in said body receiving said control unit; a link extending between said control unit and said slide means; an inclined surface in a lower portion of said edge guard and at least one beveled surface on said slide means for cooperative engagement with said inclined surface; spring means normally urging said edge guard to one of said raised or lowered positions thereof, whereby movement of said control unit within said second channel produces movement of said slide means in another direction within said first channel, thereby causing vertical movement of said edge guard; and means associated with said control unit for engaging a portion of said shaving head assembly, whereby, upon movement of said control unit toward an uppermost position, said head assembly is unlocked and slightly raised from said position of reception in said razor body.
Claim 13
Dependent Claim
220 words
An electric razor unit comprising: a razor body; at least one shaving head assembly received in said body; at least one shaving head edge guard movable in a plane substantially perpendicular to the normal cutting plane of said cutting head between raised, lowered, and intermediate positions; slide means disposed within a channel in said body for movement generally transverse to the movement plane of said edge guard; a manually operable control unit movable between at least first and second positions; a second channel in said body receiving said control unit; a link extending between said control unit and said slide means; an inclined surface in a lower portion of said edge guard and at least one beveled surface on said slide means for cooperative engagement with said inclined surface; spring means normally urging said edge guard to one of said raised or lowered positions thereof, whereby movement of said control unit within said second channel produces movement of said slide means in another direction within said first channel, thereby causing vertical movement of said edge guard; and means associated with said control unit for engaging a portion of said shaving head assembly, whereby, upon movement of said control unit toward an uppermost position, said head assembly is unlocked and slightly raised from said position of reception in said razor body.
References Cited (Backward Citations)
US3166842A
Cited
US3348307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |