Patent US3986258A successfully refreshed from Google Patents.
US3986258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Haircutter
Assignee: Individual
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Filing: 1974-05-02
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Granted: 1976-10-19
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Expires: 1994-05-02
Abstract
Abstract A hair cutter comprising a blade interchangeably retained between a blade-supporting plate and a cover plate, the latter having a row of teeth which overlaps said blade cutting edge. The plates are displaceable perpendicularly to the blade cutting edge and relatively to one another between two end positions, and the blade-supporting plate bears the blade as far as adjacent the cutting edge, yet leaving the blade cutting edge exposed. In a zone adjoining the blade cutting edge, the blade-supporting plate has at least in part a wedge-shaped portion increasing in thickness extending from the blade cutting edge in a rearward direction, so that when the hair cutter is placed on the head of the user the blade is adjustable to a cutting angle determined by front ends of the teeth and application portions of the wedge-shaped portion on the user's head. A coupling member is disposed on each of the two plates for locating the plates with respect to one another in selectable displacement positions and a spring retains the coupling members with prestressing in positive engagement with one another, an actuating element extending through one of the two plates and being accessible from an outside, and movably retained perpendicularly to the plane of the blade, and engaging with one of the coupling members and disengaging the latter on actuation against the spring.
Inventors
- 👤 Christa Liedtke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:18
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/08
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
307 words
A hair cutter comprising: a blade-supporting plate; a cover plate; at least one blade having a blade cutting edge interchangeably retained between said blade-supporting plate and said cover plate; said cover plate having a row of teeth which overlaps said blade cutting edge and being adapted when drawn through the hair to orientate the hair in the manner of a comb perpendicular to said blade cutting edge; one of said plates being displaceable in a direction perpendicular to said blade cutting edge and relative to the other of said plates between two end positions, said blade-supporting plate bears said blade in a region adjacent said cutting edge, yet with said blade cutting edge exposed; cooperative coupling member means disposed on said plates for fixing said plates in position with relation to one another in selectable displacement positions; spring means for retaining said coupling member means in positive engagement with one another, one of said plates being formed with an opening; actuating element means extending through said opening in said one of said plates and being accessible from an outside, and being movably retained perpendicularly to a plane defined by said blade, and engaging one of said coupling member means and upon actuation for disengaging the latter from another of said coupling member means against the force of said spring means; a slideway having an inner and said cover plate is displaceably mounted in said slideway, and said spring means being operative between said blade supporting plate and said cover plate, at a distance from a cutting edge front end of said cutter beyond said inner end of said slideway, said two plates being forced apart, adjacent said spring means, yet in a zone of said cutting edge of said blade said two plates being forced towards one another clamping said cutting edge of said blade firmly therebetween.
Claim 2
Dependent Claim
307 words
A hair cutter comprising: a blade-supporting plate; a cover plate; at least one blade having a blade cutting edge interchangeably retained between said blade-supporting plate and said cover plate; said cover plate having a row of teeth which overlaps said blade cutting edge and being adapted when drawn through the hair to orientate the hair in the manner of a comb perpendicular to said blade cutting edge; one of said plates being displaceable in a direction perpendicular to said blade cutting edge and relative to the other of said plates between two end positions, said blade-supporting plate bears said blade in a region adjacent said cutting edge, yet with said blade cutting edge exposed; cooperative coupling member means disposed on said plates for fixing said plates in position with relation to one another in selectable displacement positions; spring means for retaining said coupling member means in positive engagement with one another, one of said plates being formed with an opening; actuating element means extending through said opening in said one of said plates and being accessible from an outside, and being movably retained perpendicularly to a plane defined by said blade, and engaging one of said coupling member means and upon actuation for disengaging the latter from another of said coupling member means against the force of said spring means; a slideway having an inner and said cover plate is displaceably mounted in said slideway, and said spring means being operative between said blade supporting plate and said cover plate, at a distance from a cutting edge front end of said cutter beyond said inner end of said slideway, said two plates being forced apart, adjacent said spring means, yet in a zone of said cutting edge of said blade said two plates being forced towards one another clamping said cutting edge of said blade firmly therebetween.
Claim 3
Dependent Claim
72 words
A hair cutter as set forth in claim 1 wherein said slideway extends perpendicularly to said blade cutting edge and has on each of lateral outer edges of said cover plate a strip-shaped projection extending up to front ends of said teeth and said slideway is further formed with complementary grooves in opposite side walls of said blade-supporting plate in which said strip-shaped projections are disposed and which receive said cover plate.
Claim 4
Dependent Claim
231 words
A hair cutting device comprising: a blade supporting plate; a cover plate; cooperative coupling member means disposed on said plates for fixing said plates in position with relation to one another in selectable displacement positions; spring means for retaining said coupling member means in positive engagement with one another; a blade having a cutting edge and said plates releaseably retain the blade therebetween in selectable relative positions, the cover plate being formed with a row of teeth which extend beyond said cutting edge of said blade, the blade supporting plate contacting said blade adjacent said cutting edge thereof but leaving portions of the cutting edge exposed, the blade supporting plate having a wedge-shaped portion extending rearwardly from said cutting edge of the blade so that when the hair cutting device is placed on the hair of a user, the blade may be located at a cutting angle determined by the front ends of the teeth provided on the cover plate and the wedge-shaped portion of the blade supporting plate, the teeth of said row of teeth have front edge portions projecting over said cutting edge of said blade into a plane of said blade by at least the thickness of the blade immediately in front of said cutting edge of said blade when said blade supporting plate and said cover plate are in one end position of said selectable relative positions.
Claim 5
Dependent Claim
231 words
A hair cutting device comprising: a blade supporting plate; a cover plate; cooperative coupling member means disposed on said plates for fixing said plates in position with relation to one another in selectable displacement positions; spring means for retaining said coupling member means in positive engagement with one another; a blade having a cutting edge and said plates releaseably retain the blade therebetween in selectable relative positions, the cover plate being formed with a row of teeth which extend beyond said cutting edge of said blade, the blade supporting plate contacting said blade adjacent said cutting edge thereof but leaving portions of the cutting edge exposed, the blade supporting plate having a wedge-shaped portion extending rearwardly from said cutting edge of the blade so that when the hair cutting device is placed on the hair of a user, the blade may be located at a cutting angle determined by the front ends of the teeth provided on the cover plate and the wedge-shaped portion of the blade supporting plate, the teeth of said row of teeth have front edge portions projecting over said cutting edge of said blade into a plane of said blade by at least the thickness of the blade immediately in front of said cutting edge of said blade when said blade supporting plate and said cover plate are in one end position of said selectable relative positions.
Claim 6
Dependent Claim
37 words
A hair cutting device according to claim 3 wherein said front ends of said teeth are formed with rounded end portions extending at an angle to the plane of the cutting blade corresponding to said cutting angle.
Claim 7
Dependent Claim
37 words
A hair cutting device according to claim 3 wherein said wedge-shaped portion is formed at least partially of a plurality of knob or pin-like projections, the ends of the knob or pin-like projections defining said wedge-shaped portion.
Claim 8
Dependent Claim
29 words
A hair cutting device according to claim 5 wherein the lengths of said knob or pin-like projections increase with increasing distances thereof from the cutting edge of the blade.
Claim 9
Dependent Claim
35 words
A hair cutting device according to claim 5 wherein the blade supporting plate is provided with wedge-shaped projections of substantially solid material adjacent the edges thereof, said wedge-shaped projections forming part of said wedge-shaped portion.
Claim 10
Dependent Claim
84 words
A hair cutting device according to claim 3 said cooperative coupling means comprising, coupling members, spring biasing means for retaining said coupling member in positive engagement with one another, and an actuating element extending through an opening in one of said plates movably disposed therein perpendicularly relative to said plane of the blade, said actuating element operatively contacting one of said coupling members and adapted to disengage said coupling members on actuation of said actuating element against the biasing of said spring biasing means.
Claim 11
Dependent Claim
220 words
A hair cutting device comprising: a blade supporting plate; a cover plate; a blade having a cutting edge and said plates releaseably retain the blade therebetween in selectable relative positions, the cover plate being formed with a row of teeth which extend beyond said cutting edge of said blade, the blade supporting plate contacting said blade adjacent said cutting edge thereof but leaving portions of the cutting edge exposed, the blade supporting plate having a wedge-shaped portion extending rearwardly from said cutting edge of the blade so that when the hair cutting device is placed on the hair of a user, the blade may be located at a cutting angle determined by the front ends of the teeth provided on the cover plate and the wedge-shaped portion of the blade supporting plate, the teeth of said row of teeth have front edge portions projecting over said cutting edge of said blade into a plane of said blade by at least the thickness of the blade immediately in front of said cutting edge of said blade when said blade supporting plate and said cover plate are in one end position of said selectable relative positions, said blade supporting plate being provided with wedge-shaped projections of substantially solid material adjacent the edges thereof, said wedge-shaped projections forming part of said wedge-shaped portion.
Claim 12
Dependent Claim
220 words
A hair cutting device comprising: a blade supporting plate; a cover plate; a blade having a cutting edge and said plates releaseably retain the blade therebetween in selectable relative positions, the cover plate being formed with a row of teeth which extend beyond said cutting edge of said blade, the blade supporting plate contacting said blade adjacent said cutting edge thereof but leaving portions of the cutting edge exposed, the blade supporting plate having a wedge-shaped portion extending rearwardly from said cutting edge of the blade so that when the hair cutting device is placed on the hair of a user, the blade may be located at a cutting angle determined by the front ends of the teeth provided on the cover plate and the wedge-shaped portion of the blade supporting plate, the teeth of said row of teeth have front edge portions projecting over said cutting edge of said blade into a plane of said blade by at least the thickness of the blade immediately in front of said cutting edge of said blade when said blade supporting plate and said cover plate are in one end position of said selectable relative positions, said blade supporting plate being provided with wedge-shaped projections of substantially solid material adjacent the edges thereof, said wedge-shaped projections forming part of said wedge-shaped portion.
Claim 13
Dependent Claim
285 words
A hair cutting device comprising: a blade supporting plate; a cover plate; coupling means for locating said blade supporting plate and said cover plate in selectable relative positions; a blade having a cutting edge and said plates releaseably retain the blade therebetween in selectable relative positions, the cover plate being formed with a row of teeth which extend beyond said cutting edge of said blade, the blade supporting plate contacting said blade adjacent said cutting edge thereof but leaving portions of the cutting edge exposed, the blade supporting plate having a wedge-shaped portion extending rearwardly from said cutting edge of the blade so that when the hair cutting device is placed on the hair of a user, the blade may be located at a cutting angle determined by the front ends of the teeth provided on the cover plate and the wedge-shaped portion of the blade supporting plate, the teeth of said row of teeth have front edge portions projecting over said cutting edge of said blade into a plane of said blade by at least the thickness of the blade immediately in front of said cutting edge of said blade when said blade supporting plate and said cover plate are in one end position of said selectable relative positions, said coupling means comprising, coupling members, spring biasing means for retaining said coupling member in positive engagement with one another, and an actuating element extending through an opening in one of said plates movably disposed therein perpendicularly relative to said plane of the blade, said actuating element operatively contacting one of said coupling members and adapted to disengage said coupling members on actuation of said actuating element against the biasing of said spring biasing means.
Claim 14
Dependent Claim
285 words
A hair cutting device comprising: a blade supporting plate; a cover plate; coupling means for locating said blade supporting plate and said cover plate in selectable relative positions; a blade having a cutting edge and said plates releaseably retain the blade therebetween in selectable relative positions, the cover plate being formed with a row of teeth which extend beyond said cutting edge of said blade, the blade supporting plate contacting said blade adjacent said cutting edge thereof but leaving portions of the cutting edge exposed, the blade supporting plate having a wedge-shaped portion extending rearwardly from said cutting edge of the blade so that when the hair cutting device is placed on the hair of a user, the blade may be located at a cutting angle determined by the front ends of the teeth provided on the cover plate and the wedge-shaped portion of the blade supporting plate, the teeth of said row of teeth have front edge portions projecting over said cutting edge of said blade into a plane of said blade by at least the thickness of the blade immediately in front of said cutting edge of said blade when said blade supporting plate and said cover plate are in one end position of said selectable relative positions, said coupling means comprising, coupling members, spring biasing means for retaining said coupling member in positive engagement with one another, and an actuating element extending through an opening in one of said plates movably disposed therein perpendicularly relative to said plane of the blade, said actuating element operatively contacting one of said coupling members and adapted to disengage said coupling members on actuation of said actuating element against the biasing of said spring biasing means.
Claim 15
Dependent Claim
102 words
A hair cutting device according to claim 10 further comprising a slideway formed in said blade supporting plate, said cover plate is mounted within said slideway movable therein perpendicularly relative to said cutting edge of the blade, said cover plate having projecting portions which extend in the direction of displacement of said cover plate as far as said front edges of said teeth provided on the cover plate, said blade supporting plate having formed in opposite side walls thereof complementary grooves, said projecting portions being accommodated in said complementary grooves in said blade supporting plate, said complementary grooves accommodating said cover plate.
Claim 16
Dependent Claim
73 words
A hair cutting device according to claim 11 wherein said spring biasing means is operative between said blade supporting plate and said cover plate spaced from said cutting edge of said blade and beyond an inner end of the slideway, such that adjacent said spring biasing means, said plates are forced apart, but adjacent said cutting edge of said blade, said plates are forced towards one another to clamp said blade firmly therebetween.
Claim 17
Dependent Claim
105 words
A hair cutting device according to claim 10 wherein said actuating element is formed integrally with one of said coupling members and is retained on said blade supporting plate and is biased by said spring biasing means, said one of said coupling members comprises two projecting portions provided with first catch projections, said cover plate being formed with catch projections operatively engaging with said first catch projections by means of said spring biasing means, said cover plate formed with a slot extending in the direction of displacement of said cover plate with respect to said blade supporting plate, said actuating element extends through said slot.
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) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |