Patent US4581822A successfully refreshed from Google Patents.
US4581822A
Expired / Lapsed
US
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Electric hair clipper
Assignee: Maxell Ltd
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Filing: 1984-12-13
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Granted: 1986-04-15
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Expires: 2004-12-13
Abstract
Abstract The disclosure is directed to an improved electric hair clipper of a type with a pivotal head portion, having a comb plate for comb-cutting, in which a blade unit is arranged to be slidable for releasable attachment with respect to the head portion, in a longitudinal direction intersecting at right angles with a pivoting direction of the head portion through an engaging and sliding arrangement including sliding projections and corresponding guide grooves in which the sliding projections are fitted for sliding movement, so that no excessive loads are applied to a pivotal axis or pivotal angle restricting portion of the head portion, while the blade unit can be readily detached without having to touch the blade edge with a finger.
Inventors
- 👤 Einosuke Fujimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:54
CPC Classifications
B; B26; B26B; B26B19/00; B26B19/38; B26B19/3806; B26B19/3813; B26B19/02; B26B19/04; B26B19/06; B26B19/063; B26B19/28; B26B19/3846; B26B19/3853; B26B19/386; B26B19/3886
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
282 words
An electric hair clipper which comprises a main body casing having a grip portion provided therein with a motor and a power switch and a head portion pivotally connected to said grip portion at a support axis for pivotal movement about said support axis with respect to said grip portion, and a blade unit including a stationary blade, a movable blade adapted to slidably contact the stationary blade under pressure and a follower piece fixed to said movable blade, said blade unit being slidably and detachably mounted on said head a portion in position beyond said support axis through an engaging and sliding means, said head portion being provided with a vibrating piece for converting rotation of the motor into reciprocating movement, with a vibrating lever formed at one end of said vibrating piece being arranged to project toward a blade unit mounting portion at a forward side of the head portion for engagement with said follower piece upon mounting of the blade unit onto said head portion, said vibrating piece being adapted to effect the pivotal movement together with said head portion, with a shaft of the motor being associated with said follower piece by said vibrating piece, said head portion being arranged to pivotally move between a first position where its axis is held generally on a straight line with respect to an axis of said grip portion and a second position where its axis is inclined to form a predetermined angle with respect to the axis of said grip portion, with only the blade edge being exposed out of said head portion so as to be located above an extension line of the upper wall of the grip portion.
Claim 2
Dependent Claim
282 words
An electric hair clipper which comprises a main body casing having a grip portion provided therein with a motor and a power switch and a head portion pivotally connected to said grip portion at a support axis for pivotal movement about said support axis with respect to said grip portion, and a blade unit including a stationary blade, a movable blade adapted to slidably contact the stationary blade under pressure and a follower piece fixed to said movable blade, said blade unit being slidably and detachably mounted on said head a portion in position beyond said support axis through an engaging and sliding means, said head portion being provided with a vibrating piece for converting rotation of the motor into reciprocating movement, with a vibrating lever formed at one end of said vibrating piece being arranged to project toward a blade unit mounting portion at a forward side of the head portion for engagement with said follower piece upon mounting of the blade unit onto said head portion, said vibrating piece being adapted to effect the pivotal movement together with said head portion, with a shaft of the motor being associated with said follower piece by said vibrating piece, said head portion being arranged to pivotally move between a first position where its axis is held generally on a straight line with respect to an axis of said grip portion and a second position where its axis is inclined to form a predetermined angle with respect to the axis of said grip portion, with only the blade edge being exposed out of said head portion so as to be located above an extension line of the upper wall of the grip portion.
Claim 3
Dependent Claim
62 words
An electric hair clipper as claimed in claim 1, wherein said blade unit is arranged to be detachably mounted through the engaging and sliding means onto the head portion from a forward side of said head portion through sliding movement thereof in a longitudinal direction intersecting at right angles with upward and downward directions for the pivotal movement of said head portion.
Claim 4
Dependent Claim
78 words
An electric hair clipper as claimed in claim 2, wherein said engaging and sliding means includes sliding projections and corresponding guide grooves in which said sliding projections are fitted for a sliding movement therein, said sliding projections and guide grooves being respectively provided in said blade unit and head portion, said engaging and sliding means being positionally set approximately on the same line as a line in the longitudinal direction passing through a center of said support axis.
Claim 5
Dependent Claim
39 words
An electric hair clipper as claimed in claim 2, wherein the direction of mounting of said blade unit onto the head portion is generally on the same line as the line passing through the center of said support axis.
Claim 6
Dependent Claim
53 words
An electric hair clipper as claimed in claim 1, wherein said support axis for the pivotal movement of said head portion includes support shafts provided with a pivotal movement lock means for locking said head portion at said first or second position or releasing said head portion from the lock at said position.
Claim 7
Dependent Claim
81 words
An electric hair clipper as claimed in claim 1, wherein a gap for allowing cut hair to escape is provided between said head portion and said grip portion, said gap being adapted to be rather large in size in said first position of said head portion to such an extent that part of said gap still remains in said second position of said head portion so as not to strongly hold cut hair between said head portion and said grip portion.
Claim 8
Dependent Claim
92 words
An electric hair clipper as claimed in claim 1, further including a comb plate slidably provided in said head portion for advancing or retreatment with respect to the edge of said stationary blade when said blade unit is mounted on said head portion, between a position corresponding to the edge and another position not corresponding to said edge, said comb plate being arranged to be advanced or retreated with respect to the edge of the stationary blade through a space between the upper wall for said head portion and said movable blade.
Claim 9
Dependent Claim
26 words
An electric hair clipper as claimed in claim 7, wherein an operating knob for said comb plate is provided at the side of said grip portion.
Claim 10
Dependent Claim
23 words
An electric hair clipper as claimed in claim 8, wherein said operating knob for said comb plate is associated with said power switch.
Claim 11
Dependent Claim
45 words
An electric hair clipper as claimed in claim 1, wherein a direction for insertion or withdrawal of the vibrating lever with respect to said follower piece is arranged to be parallel with the direction of attaching or detaching the blade unit onto said head portion.
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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) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |