Patent US4670982A successfully refreshed from Google Patents.
US4670982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hair cutter
Assignee: Individual
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Filing: 1985-11-04
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Granted: 1987-06-09
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Expires: 2005-11-04
Abstract
Abstract An open bottom housing containing motor driven cutting blades is placed on the head and the hair if drawn up into the housing and through the cutting blades by an upward air flow through the housing. This air flow is produced by a suction connection at the top of the housing actuated by an ordinary vacuum cleaner. A plurality of feet around the bottom opening rest on the scalp to provide an air inlet for the upward air flow.
Inventors
- 👤 Daniel S. Y. Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:14
CPC Classifications
B; B26; B26B; B26B19/00; B26B19/38; B26B19/44
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
167 words
A hair cutter comprising a housing containing a horizontal stationary blade unit and a rotary blade unit in engagement therewith for cutting the hair, said housing having an open bottom provided with feet to engage a scalp having hair to be cut, said feet providing an open space between said scalp and housing to admit an air flow into said open bottom, a suction tube connection on said housing above said blade units for introducing air suction to draw hair from said scalp up through said blade units, a motor driving said rotary blade unit, a vertical guide tube above said blade units, a hollow drive shaft in said guide tube having a square open center, a motor driven square stub shaft in the upper end of said drive shaft a square stub shaft in the lower end of said drive shaft in driving engagement with said rotary blade unit, and a coil spring in said drive shaft compressed between the confronting ends of said stub shafts.
Claim 2
Dependent Claim
167 words
A hair cutter comprising a housing containing a horizontal stationary blade unit and a rotary blade unit in engagement therewith for cutting the hair, said housing having an open bottom provided with feet to engage a scalp having hair to be cut, said feet providing an open space between said scalp and housing to admit an air flow into said open bottom, a suction tube connection on said housing above said blade units for introducing air suction to draw hair from said scalp up through said blade units, a motor driving said rotary blade unit, a vertical guide tube above said blade units, a hollow drive shaft in said guide tube having a square open center, a motor driven square stub shaft in the upper end of said drive shaft a square stub shaft in the lower end of said drive shaft in driving engagement with said rotary blade unit, and a coil spring in said drive shaft compressed between the confronting ends of said stub shafts.
Claim 3
Dependent Claim
45 words
A hair cutter as defined in claim 1, the lower end of said lower square stub shaft being seated in a square hole in said rotary blade unit and the upper end of said lower stub shaft having an enlarged head in said drive shaft.
Claim 4
Dependent Claim
21 words
A hair cutter as defined in claim 2, said rotary blade unit being seated for rotation on said stationary blade unit.
Claim 5
Dependent Claim
184 words
A hair cutter comprising a housing containing a horizontal stationary blade unit and a rotary blade unit in engagement therewith for cutting the hair, said housing having an open bottom with feet to engage a scalp having hair to be cut, said feet providing an open space between said scalp and housing to admit an air flow into said open bottom, a suction tube connection on said housing above said blade units for introducing air suction to draw hair from said scalp up through said blade units, a motor driving said rotary blade unit continuously in one direction, said rotary blade unit comprising a small number of radial blade arms, said stationary blade unit being supported in said housing by a circular peripheral edge portion beyond the ends of said rotary blade arms and having a large number of radial slots forming radial cutting blades between said slots, said slots extending beyond the ends of said rotary blade arms and being widened in said extended portions to receive temporarily any uncut hairs that have been pushed outwardly along the slots by the rotary blades.
Claim 6
Dependent Claim
184 words
A hair cutter comprising a housing containing a horizontal stationary blade unit and a rotary blade unit in engagement therewith for cutting the hair, said housing having an open bottom with feet to engage a scalp having hair to be cut, said feet providing an open space between said scalp and housing to admit an air flow into said open bottom, a suction tube connection on said housing above said blade units for introducing air suction to draw hair from said scalp up through said blade units, a motor driving said rotary blade unit continuously in one direction, said rotary blade unit comprising a small number of radial blade arms, said stationary blade unit being supported in said housing by a circular peripheral edge portion beyond the ends of said rotary blade arms and having a large number of radial slots forming radial cutting blades between said slots, said slots extending beyond the ends of said rotary blade arms and being widened in said extended portions to receive temporarily any uncut hairs that have been pushed outwardly along the slots by the rotary blades.
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) | 1990-06-08 | 1990-12-08 | 1991-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-08 | 1994-12-08 | 1995-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-08 | 1998-12-08 | 1999-06-09 | $7700.00 | Window Closed / Lapsed |