US4524772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for hair removal
Assignee: IMPROVER Corp
•
Filing: 1983-07-22
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Granted: 1985-06-25
•
Expires: 2003-07-22
Abstract
Abstract An electrically powered depilatory device including a hand held portable housing, motor apparatus disposed in the housing, and a helical spring comprising a plurality of adjacent windings arranged to be driven by the motor apparatus in rotational sliding motion relative to skin bearing hair to be removed, the helical spring including an arcuate hair engaging portion arranged to define a convex side whereat the windings are spread apart, and a concave side corresponding thereto whereat the windings are pressed together, the rotational motion of the helical spring producing continuous motion of the windings from a spread apart orientation at the convex side to a pressed together orientation at the concave side and for engagement and plucking of hair from the skin, whereby the surface velocities of the windings relative to the hair greatly exceeds the surface velocity of the housing relative thereto.
Inventors
- 👤 Yair Daar
- 👤 Shimon Yahav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:47
CPC Classifications
A; A45; A45D; A45D26/00; A45D26/0042; A45D26/0047; A45D26/0052
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
145 words
An electrically powered depilatory device comprising: a hand held portable housing; motor means disposed in said housing; and a helical spring comprising a plurality of adjacent windings arranged to be driven by said motor means in rotational sliding motion relative to skin bearing hair to be removed, said helical spring including an arcuate hair engaging portion arranged to define a convex side whereat the windings are spread apart, and a concave side corresponding thereto whereat the windings are pressed together, the rotational motion of the helical spring producing continuous motion of the windings from a spread apart orientation at the convex side to a pressed together orientation at the concave side and for engagement and plucking of hair from the skin of the subject, whereby the surface velocities of the windings relative to the skin greatly exceeds the surface velocity of the housing relative thereto.
Claim 2
Dependent Claim
145 words
An electrically powered depilatory device comprising: a hand held portable housing; motor means disposed in said housing; and a helical spring comprising a plurality of adjacent windings arranged to be driven by said motor means in rotational sliding motion relative to skin bearing hair to be removed, said helical spring including an arcuate hair engaging portion arranged to define a convex side whereat the windings are spread apart, and a concave side corresponding thereto whereat the windings are pressed together, the rotational motion of the helical spring producing continuous motion of the windings from a spread apart orientation at the convex side to a pressed together orientation at the concave side and for engagement and plucking of hair from the skin of the subject, whereby the surface velocities of the windings relative to the skin greatly exceeds the surface velocity of the housing relative thereto.
Claim 3
Dependent Claim
51 words
An electrically powered depilatory device according to claim 1 and wherein said helical spring arcuate hair engaging portion extends along an arc subtending more than 90 degrees whereby the surface velocities of windings of the helical spring simultaneously include components extending in mutually perpendicular directions, for significantly enhanced hair removal efficiency.
Claim 4
Dependent Claim
27 words
An electrically powered depilatory device according to claim 1 and wherein said helical spring arcuate hair engaging portion extends along an arc subtending more than 180 degrees.
Claim 5
Dependent Claim
27 words
An electrically powered depilatory device according to claim 2 and wherein said helical spring arcuate hair engaging portion extends along an arc subtending more than 180 degrees.
Claim 6
Dependent Claim
125 words
An electrically powered depilatory device comprising: a hand held portable housing; motor means disposed in said housing; and a helical spring comprising a plurality of adjacent windings arranged in a loop for being driven in rotational motion by said motor means, said helical spring loop defining along substantially the entire length thereof an arcuate hair engaging portion arranged to define a convex side whereat the windings are spread apart, and a concave side corresponding thereto whereat the windings are pressed together, the rotational motion of said helical spring producing continuous motion of the windings from a spread apart orientation at the convex side to a pressed together orientation at the concave side and for engagement and plucking of hair from the skin of the subject.
Claim 7
Dependent Claim
125 words
An electrically powered depilatory device comprising: a hand held portable housing; motor means disposed in said housing; and a helical spring comprising a plurality of adjacent windings arranged in a loop for being driven in rotational motion by said motor means, said helical spring loop defining along substantially the entire length thereof an arcuate hair engaging portion arranged to define a convex side whereat the windings are spread apart, and a concave side corresponding thereto whereat the windings are pressed together, the rotational motion of said helical spring producing continuous motion of the windings from a spread apart orientation at the convex side to a pressed together orientation at the concave side and for engagement and plucking of hair from the skin of the subject.
Claim 8
Dependent Claim
43 words
An electrically powered depilatory device according to claim 1 and wherein said helical spring is oriented such that at said convex side of said hair engaging portion, the orientation of adjacent spread apart windings defines an angle therebetween of at least 1.5 degrees.
Claim 9
Dependent Claim
43 words
An electrically powered depilatory device according to claim 5 and wherein said helical spring is oriented such that at said convex side of said hair engaging portion, the orientation of adjacent spread apart windings defines an angle therebetween of at least 1.5 degrees.
Claim 10
Dependent Claim
23 words
An electrically powered depilatory device according to claim 7 and wherein said angle between adjacent spread apart windings is at least 2.0 degrees.
Claim 11
Dependent Claim
44 words
An electrically powered depilatory device according to claim 1 and wherein said helical spring is oriented such that at said convex side of said hair engaging portion, the orientation of the adjacent spread apart windings defines a maximum separation of at least 0.15 mm.
Claim 12
Dependent Claim
44 words
An electrically powered depilatory device according to claim 1 and wherein said helical spring is oriented such that at said convex side of said hair engaging portion, the orientation of the adjacent spread apart windings defines a maximum separation of at least 0.2 mm.
Claim 13
Dependent Claim
65 words
An electrically powered depilatory device according to claim 1 and wherein said housing is defined as a modular two part housing, one part including the motor apparatus and the other part including the helical spring, whereby the part including the helical spring may be readily removed from the part including the motor apparatus for easy sanitization of the helical spring or replacement thereof as desired.
Claim 14
Dependent Claim
29 words
An electrically powered depilatory device according to claim 1 and wherein said motor means comprises a pair of motors coupled to respective opposite free ends of the helical spring.
Claim 15
Dependent Claim
18 words
An electrically powered depilatory device according to claim 1 and wherein said motor means comprises a single motor.
Claim 16
Dependent Claim
44 words
An electrically powered depilatory device according to claim 5 and wherein said helical spring is oriented such that at said convex side of said hair engaging portion, the orientation of the adjacent spread apart windings defines a maximum separation of at least 0.15 mm.
Claim 17
Dependent Claim
44 words
An electrically powered depilatory device according to claim 5 and wherein said helical spring is oriented such that at said convex side of said hair engaging portion, the orientation of the adjacent spread apart windings defines a maximum separation of at least 0.2 mm.
Claim 18
Dependent Claim
65 words
An electrically powered depilatory device according to claim 5 and wherein said housing is defined as a modular two part housing, one part including the motor apparatus and the other part including the helical spring, whereby the part including the helical spring may be readily removed from the part including the motor apparatus for easy sanitization of the helical spring or replacement thereof as desired.
Claim 19
Dependent Claim
29 words
An electrically powered depilatory device according to claim 5 and wherein said motor means comprises a pair of motors coupled to respective opposite free ends of the helical spring.
Claim 20
Dependent Claim
18 words
An electrically powered depilatory device according to claim 5 and wherein said motor means comprises a single motor.
Claim 21
Dependent Claim
154 words
A powered depilatory device comprising: a portable housing; at least one motor accommodated in said housing; a first and a second spindle rotatably mounted to said housing, of which at least said first spindle is coupled to, and driven by, at least said motor; and a helical spring, one end of which is fixedly attached to said first spindle and thereby rotatable by at least said motor, and the second end of which is fixedly attached to said second spindle, at least one portion of said spring between said two spindles being arcuate and subtending an angle of at least 180 degrees to the effect at that the convex side of said arcuate portion the windings of said helical spring are spread open, while at the concave side of said arcuate portion they are pressed together, whereby wedge-like gaps are formed between adjacent windings along at least a major portion of said arcuate portion.
Claim 22
Dependent Claim
154 words
A powered depilatory device comprising: a portable housing; at least one motor accommodated in said housing; a first and a second spindle rotatably mounted to said housing, of which at least said first spindle is coupled to, and driven by, at least said motor; and a helical spring, one end of which is fixedly attached to said first spindle and thereby rotatable by at least said motor, and the second end of which is fixedly attached to said second spindle, at least one portion of said spring between said two spindles being arcuate and subtending an angle of at least 180 degrees to the effect at that the convex side of said arcuate portion the windings of said helical spring are spread open, while at the concave side of said arcuate portion they are pressed together, whereby wedge-like gaps are formed between adjacent windings along at least a major portion of said arcuate portion.
Claim 23
Dependent Claim
15 words
The depilatory device as claimed in claim 19, wherein said motor is an electric motor.
Claim 24
Dependent Claim
21 words
The depilatory device as claimed in claim 19 wherein two electric motors are provided, wired for rotation in mutually opposite senses.
Claim 25
Dependent Claim
50 words
The depilatory device as claimed in claim 19, wherein one electric motor only is provided and wherein a gear train is used to drive also said second spindle, which gear train comprises an idler gear to reverse the sense of rotation of said second spindle relative to said first spindle.
Claim 26
Dependent Claim
26 words
The depilatory device as claimed in claim 19 and further comprising a stiffening wire inside said spring, which wire is substantially stationary relative to said spring.
Claim 27
Dependent Claim
24 words
The depilatory device as claimed in claim 1, wherein said rotatably mounted spindles are arranged in a bearing mount removably insertable in said housing.
Claim 28
Dependent Claim
145 words
A power drivable depilatory device comprising: a housing accommodating a first and second spindle rotatably mounted thereto, of which at least said first spindle is coupled to and driven by a source of rotary power; a helical spring, one end of which is fixedly attached to said first spindle and thereby rotatable by said source of rotary power, and the second end of which is fixedly attached to said second spindle, at least one portion of said spring between said two spindles being arcuate and subtending an angle of at least 180 degrees to the effect that at the convex side of its arcuate shape the windings of said helical spring are spread open, while at the concave side of said arcuate shape they are pressed together. whereby wedge-like gaps are formed between adjacent windings along at least a major portion of said arcuate portion.
Claim 29
Dependent Claim
145 words
A power drivable depilatory device comprising: a housing accommodating a first and second spindle rotatably mounted thereto, of which at least said first spindle is coupled to and driven by a source of rotary power; a helical spring, one end of which is fixedly attached to said first spindle and thereby rotatable by said source of rotary power, and the second end of which is fixedly attached to said second spindle, at least one portion of said spring between said two spindles being arcuate and subtending an angle of at least 180 degrees to the effect that at the convex side of its arcuate shape the windings of said helical spring are spread open, while at the concave side of said arcuate shape they are pressed together. whereby wedge-like gaps are formed between adjacent windings along at least a major portion of said arcuate portion.
Claim 30
Dependent Claim
26 words
A powered depilatory device according to claim 1, wherein said portion of said spring between said two spindles subtends an angle of at least 360 degrees.
Claim 31
Dependent Claim
28 words
A depilatory device according to claim 1 and wherein said helical spring is driven in rotary motion having a surface speed of at least 70 meters per minute.
Claim 32
Dependent Claim
28 words
A depilatory device according to claim 5 and wherein said helical spring is driven in rotary motion having a surface speed of at least 70 meters per minute.
Claim 33
Dependent Claim
26 words
A depilatory device according to claim 1 and wherein said helical spring is driven in rotary motion having a surface speed above 100 meters per minute.
Claim 34
Dependent Claim
26 words
A depilatory device according to claim 5 and wherein said helical spring is driven in rotary motion having a surface speed above 100 meters per minute.
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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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |