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US4150483A Expired / Lapsed US ⏱️ 0.0 years remaining

Hair cutting device

Assignee: Individual
•
Filing: 1977-06-14
•
Granted: 1979-04-24
•
Expires: 1997-06-14
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Abstract

Abstract A suction type hair cutting device which is comprised of a casing, a suction passage housed by said casing and connected to a vacuum source, and an inlet at the end of said suction passage provided with a fixed blade and an arcuate oscillatory blade. The arcuate oscillatory blade is directly driven by a crank at the output shaft of a motor mounted on the casing, or is driven by a gear mechanism which is rotatable through a flexible wire or the like, whereby the arcuate oscillatory blade is slidably oscillated relative to the fixed blade. The suction inlet is provided with means for controlling or turning air flow rearwards of said both blades which are adjacently elastically arranged to each other, so as to cut hair positively. The cutting hair length may be easily adjusted with the provision of a suction tube which can be connected to said suction inlet, the suction tube being adjustable in its axial length. Otherwise, the cutting hair length may be also easily adjusted by using a hair cutting gauge which is comprised of a head covering body of wall member of a desired thickness defining a plurality of openings for having the hair sucked therethrough, wherein the suction inlet of the hair cutting device is moved along the outer surface of hair cutting gauge during hair cutting operation.

Inventors

  • 👤 Yukio Kanazawa

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 06:28
CPC Classifications
B; B26; B26B; B26B19/00; B26B19/38; B26B19/44

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 103 words
A suction type hair cutting device comprising a casing having an air passage therethrough, one end of said air passage forming a suction inlet and the other end of said air passage being adapted for connection to a vacuum source; a fixed circular blade positioned in said suction inlet; an arcuately oscillatory circular blade positioned adjacent to said fixed blade and arcuately oscillatory with respect thereto; and an annular projection formed around the inner surface of said suction inlet, wherein said fixed blade and said arcuately oscillatory blade are positioned with respect to said annular projection to form an air flow passage therebetween.
Claim 2
Dependent Claim 103 words
A suction type hair cutting device comprising a casing having an air passage therethrough, one end of said air passage forming a suction inlet and the other end of said air passage being adapted for connection to a vacuum source; a fixed circular blade positioned in said suction inlet; an arcuately oscillatory circular blade positioned adjacent to said fixed blade and arcuately oscillatory with respect thereto; and an annular projection formed around the inner surface of said suction inlet, wherein said fixed blade and said arcuately oscillatory blade are positioned with respect to said annular projection to form an air flow passage therebetween.
Claim 3
Dependent Claim 67 words
A suction type hair cutting device as set forth in claim 1 including a motor means having an output shaft, mounted on said casing; a crank means for coupling said output shaft to said arcuately oscillatory blade for reciprocating said arcuately oscillatory blade in an arcuate oscillatory movement with respect to said fixed blade; and means for elastically biasing said arcuately oscillatory blade towards said fixed blade.
Claim 4
Dependent Claim 70 words
A suction type hair cutting device defined in claim 1, wherein a means for controlling or turning air flow is provided in said suction inlet, said fixed blade and said arcuately oscillatory blade are disposed at a position nearer to the forward end of the air passage than said air flow turning means, both of said blades being formed in circular shape and having cutting portions at respective inner peripheries.
Claim 5
Dependent Claim 32 words
A suction type hair cutting device defined in claim 1, wherein said arcuately oscillatory blade is interengaged with a gear mechanism, said gear mechanism being driven through a flexible wire connected thereto.
Claim 6
Dependent Claim 28 words
A suction type hair cutting device defined in claim 1, including a suction tube connected to said suction inlet, said suction tube being adjustable in its axial length.
Claim 7
Dependent Claim 98 words
A suction type hair cutting device defined in claim 1, including a hair cutting gauge, said hair cutting gauge being formed with a head covering body of wall member defining a plurality of openings in a grid pattern, the inner surface of said gauge having a plurality of projections for retaining a given space between said inner surface and a head when the gauge is put on the head, the outer surface of said gauge having a configuration corresponding to desired hair length, wherein said hair cutting device is slidably operated along the outer surface of said gauge.

References Cited (Backward Citations)

US1238061A Cited
US2292453A Cited
US2722223A Cited
US3260268A Cited
US3273237A Cited
US3979825A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-04-23 1982-10-23 1983-04-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-04-23 1986-10-23 1987-04-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-04-23 1990-10-23 1991-04-24 $7700.00 Window Closed / Lapsed

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