Patent US4642892A successfully refreshed from Google Patents.
US4642892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
T-shaped razor
Assignee: Feather Safety Razor Co Ltd
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Filing: 1984-12-05
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Granted: 1987-02-17
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Expires: 2004-12-05
Abstract
Abstract Herein disclosed is a T-shaped razor comprising a holder, and a head attached to the holder and having at least one blade. The head is supported such that it can move in directions which are inclined generally in the longitudinal direction of the holder with respect to a plane longitudinal in the extending direction of the edge of the blade. Further comprised is drive means which is disposed in the holder for reciprocating the head obliquely.
Inventors
- 👤 Minoru Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:59
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/08; B26B21/14; B26B21/38
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
267 words
A T-shaped razor comprising: a holder adapted to be held by a user for shaving, said holder having an upper end portion, and front, rear and two side portions, said front portion being adapted to face parallel to a skin surface to be shaved when the holder is held by the user for shaving; means for supporting a blade cartridge slidably connected to the upper end portion of the holder, said supporting means being at least obliquely and rectilinearly slidabe along a path extending from the front side portion to the rear side portion of the holder so that the supporting means is gradually moved between the front and rear portions as the supporting means moves laterally between the two side portions; a blade cartridge connected to the supporting means and having at least one blade with a blade edge for shaving, said blade cartridge being inclined relative to the supporting means so that the blade edge extends perpendicularly to the longitudinal direction of the holder and parallel to the front portion of the holder, said blade edge, when the blade cartridge is moved along the path while the blade edge abuts against the skin surface to be shaved, moving obliquely relative to the longitudinal direction of the blade edge and substantially parallel to the skin surface to be shaved thereby to cut hairs with an action that also pulls the hairs; and means for reciprocating the supporting means along the path, said reciprocating means being installed in the holder so that when the reciprocating means is actuated, the blade cartridge reciprocates together with the supporting means.
Claim 2
Dependent Claim
267 words
A T-shaped razor comprising: a holder adapted to be held by a user for shaving, said holder having an upper end portion, and front, rear and two side portions, said front portion being adapted to face parallel to a skin surface to be shaved when the holder is held by the user for shaving; means for supporting a blade cartridge slidably connected to the upper end portion of the holder, said supporting means being at least obliquely and rectilinearly slidabe along a path extending from the front side portion to the rear side portion of the holder so that the supporting means is gradually moved between the front and rear portions as the supporting means moves laterally between the two side portions; a blade cartridge connected to the supporting means and having at least one blade with a blade edge for shaving, said blade cartridge being inclined relative to the supporting means so that the blade edge extends perpendicularly to the longitudinal direction of the holder and parallel to the front portion of the holder, said blade edge, when the blade cartridge is moved along the path while the blade edge abuts against the skin surface to be shaved, moving obliquely relative to the longitudinal direction of the blade edge and substantially parallel to the skin surface to be shaved thereby to cut hairs with an action that also pulls the hairs; and means for reciprocating the supporting means along the path, said reciprocating means being installed in the holder so that when the reciprocating means is actuated, the blade cartridge reciprocates together with the supporting means.
Claim 3
Dependent Claim
25 words
A T-shaped razor according to claim 1, in which length of said path along which the supporting means reciprocates is at least about 1 mm.
Claim 4
Dependent Claim
123 words
A T-shaped razor according to claim 2, in which said supporting means comprises at least two guide protrusions connected to the upper end portion of the holder, and a cartridge holding device having a holding portion at an upper end thereof for firmly and exchangeably receiving the blade cartridge and at least two guide holes for connecting the cartridge holding device to the holder and extending obliquely relative to the front portion of the holder when the cartridge holding device is connected to the holder, said guide protrusions being inserted into the guide holes thereby to connect the cartridge holding device to the holder so that when the reciprocating means is actuated, the cartridge holding device is obliquely moved relative to the holder.
Claim 5
Dependent Claim
95 words
A T-shaped razor according to claim 3, in which said cartridge holding device includes an engagement recess at a lower portion thereof, and said reciprocating means includes a motor having a rotatory output, reduction gear means connected to the motor, a rotary member connected to the reduction gear means and having an eccentric shaft, and an arm engaging the eccentric shaft at a lower end and the engagement recess at an upper end thereof so that when the motor is actuated, the eccentric shaft rotates to thereby reciprocate the cartridge holder along the guide holes.
Claim 6
Dependent Claim
113 words
A T-shaped razor according to claim 2, in which said supporting means comprises a mounting portion connected to the upper end portion of the holder, said mounting portion having a guide groove constituting the path of the supporting means, and a cartridge holding device slidably situated in said guide groove of the mounting portion, said cartridge holding device having a holding portion at an upper end thereof for firmly and exchangeably receiving the blade cartridge, the blade edge of the blade cartridge, when the blade cartridge is firmly attached to the cartridge holding device, being oriented perpendicularly to the longitudinal direction of the holder and parallel to the front portion of the holder.
Claim 7
Dependent Claim
55 words
A T-shaped razor according to claim 5, in which said mounting portion of the support means is oriented relative to the holder so that the cartridge holding device faces perpendicularly to the skin surface to be shaved, whereby the blade edge abutting against said skin surface can be reciprocated substantially parallel to said skin surface.
Claim 8
Dependent Claim
33 words
A T-shaped razor according to claim 6, in which said mounting portion of the supporting means further comprises a rail portion inside the guide groove, said cartridge holding device engaging said rail portion.
Claim 9
Dependent Claim
87 words
A T-shaped razor according to claim 6, in which said cartridge holding device includes an engagement recess at a lower portion thereof situated inside the guide groove, and said reciprocating means includes a motor having a rotating output, reduction gear means connected to the motor, and a rotary member connected to the reduction gear means, said rotary member having an eccentric shaft engaging said engagement recess so that when the motor is actuated, the eccentric shaft rotates to thereby reciprocate the cartridge holding device along the path.
Claim 10
Dependent Claim
36 words
A T-shaped razor according to claim 6, in which said supporting means further comprises at least one spring situated in the guide groove thereof to urge the cartridge holder in one direction along the guide groove.
Claim 11
Dependent Claim
69 words
A T-shaped razor according to claim 9, in which said reciprocating means comprises a lever having upper and lower end portions, and a shaft connected to the lever for pivotally supporting the lower end portion of the lever, the upper end portion of the lever being connected to the cartridge holding device so that when the lever is pushed, the cartridge holding device is moved along the guide groove.
Claim 12
Dependent Claim
111 words
A T-shaped razor according to claim 9, in which said reciprocating means comprises a lever having upper and lower end portions, a shaft connected to the lever between the upper and lower end portions, said shaft being pivotally connected to the holder for supporting the lever for rotation about the holder, a grip portion slidably situated over the holer, and a spring for urging the grip portion upwardly, said upper end portion of the lever engaging the cartridge holder and the lower end portion of the lever engaging the grip portion so that when the grip portion is moved along the holder, the cartridge holder is moved along the guide groove.
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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) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |