GB1570462A - Electric dry shavers - Google Patents
Electric dry shavers Download PDFInfo
- Publication number
- GB1570462A GB1570462A GB5048977A GB5048977A GB1570462A GB 1570462 A GB1570462 A GB 1570462A GB 5048977 A GB5048977 A GB 5048977A GB 5048977 A GB5048977 A GB 5048977A GB 1570462 A GB1570462 A GB 1570462A
- Authority
- GB
- United Kingdom
- Prior art keywords
- drive
- cutter
- support member
- inner cutter
- drive arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011888 foil Substances 0.000 claims description 35
- 238000010008 shearing Methods 0.000 claims description 10
- 230000008901 benefit Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 3
- 230000000452 restraining effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005323 electroforming Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
- B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
- B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
- B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
- B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
- B26B19/10—Cutting heads therefor; Cutters therefor; Securing equipment thereof involving two or more different types of reciprocating cutting elements, e.g. a pair of toothed shearing elements combined with a pair of perforated cutting elements or a combined toothed and perforated cutting assembly
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dry Shavers And Clippers (AREA)
Description
(54) IMPROVEMENTS IN OR RELATING TO ELECTRIC DRY SHAVERS
(71) We. REMINGTON PRODUCTS.
INC. a Delaware Corporation with an office at 60 Main Street. Bridgeport, Connecticut 06602, United States of America, do hereby declare the invention, for which we pray that a patent may be granted to us and the method by which it is to be performed, to be particularly described in and by the following statement:
The present invention is directed to new and useful improvements in electric dry shavers and in particular to means for mounting a movable inner cutter on motor operated drive means.
Electric dry shavers usually include a cutter head assembly comprising an outer cutter and a motor driven inner cutter operable to shear hair bristles combed through slots or apertures in the outer cutter into the path of the moving inner cutter. In certain type electric dry shavers the outer cutter comprises a thin flexible metallic foil provided with a plurality of hair receiving apertures.
The inner cutter is comprised of a plurality of arcuate shaped cutter blades urged into contact with the undersurface of the foil to conform the foil to the arcuate shape of the edges of the cutter blades. Certain of these foil type cutter heads include a plurality of parallel arcuate surfaces in conformance to a like number of rows of arcuate inner cutter blades.
It is known in these foil type shavers to mount the inner cutter on a support member which is interconnected to the motor operated drive means. The outer cutter foil is usually secured to a removable hairpocket section of the shaver casing with spaced longitudinally extending marginal portions connected to the spaced sidewalls of the hairpocket. When the hairpocket section is connected to the main shaver casing the flexible foil engages the resiliently mounted inner cutter to conform to the configuration thereof. In use of the shaver the inner cutter will reciprocate relative to the stationary foil. When the foil outer cutter is pressed against the skin surface it will deflect downwardly against the moving inner cutter. It is desirable that during this movement that the inner cutter be maintained in shearing engagement with the undersurface of the foil for proper cutting action.In order to accommodate the movement of the foil and the downward and sideways movement of the inner cutter in response thereto as it reciprocates, the inner cutter must therefore be permitted to move about the axis of the drive member.
In the past problems have been encountered in providing efficient interconnecting means for mounting the inner cutter to the drive means to allow for efficient drive of the inner cutter. Further means must be provided to both mount the inner cutter for ready detachment when neccessary and for securely mounting the same against accidental disconnection during operation. Various means, such as interlocking pins, lock washers and bifurcated detenting drive arms have been used in the past to interconnect the inner cutter to the drive means. Typical of these prior art devices are disclosed in
U.S. Patent Nos. 2 900 719; 2 908 970; 3 290 781; 3 783 508; and 3838314.
Although these known devices have proven generally satisfactory they present relatively complex assembly procedures leading to increased manufacturing costs both in time and parts.
According to a first aspect there is provided an electric shaver comprising a flexible outer cutter and a movable inner cutter; a support member mounting said inner cutter in shearing engagement with said outer cutter; spring means maintaining said inner cutter in said shearing engagement; a motor operated drive arm in driving engagement with said support member, said drive arm operable for driving said inner cutter rela tive to said outer cutter; and means provided on said drive arm and said support member for universal swiveling and lateral movements of said support member relative to said drive arm upon flexing movement of said outer cutter.
According to another aspect there is provided an electric shaver comprising a flexible bow-shaped foil outer cutter; an inner cutter having arcuate-shaped cutter blades; a frame for supporting said cutter blades and having a rectangular-shaped drive slot formed therein, said drive slot being formed with spaced endwalls and spaced sidewalls; spring means engaging said support frame to both urge said inner cutter into shearing engagement with said foil outer cutter and to permit downward or lateral flexing movement of said foil outer cutter upon external pressure being applied thereto; an elongated motor operated drive arm extending from said motor having a longitudinal axis and terminating in a drive head disposed within said drive slot, said drive head having rounded opposite end surfaces, said end surfaces being in driving contact with opposed portions of said endwalls; and said side surfaces of the drive head being spaced from the sidewalls of said drive slot allowing universal swiveling and lateral movements of said inner cutter about the longitudinal axis of said drive arm upon said downward or lateral flexing movement of the foil outer cutter.
An embodiment of the invention will now be described by way of example with reference to the accompanying drawings wherein:
FIG. 1 is a fragmentary perspective view of the upper portion of an electric dry shaver;
FIG. 2 is a fragmentary front elevational view of the electric dry shaver of FIG. 1 with parts of the casing broken away to show portions of the interior thereof;
FIG. 3 is a fragmentary side elevational view of the shaver taken on the line 3-3 of
FIG. 2;
FIG. 4 is an exploded perspective view of an inner cutter assembly and drive means therefor;
FIG. 5 is a fragmentary plan view of the drive connection in the inner cutter support member;
FIG. 6 is a diagrammatic front view of the inner cutter showing the directions of movement of the cutter support member; and
FIG. 7 is a diagrammatic plan view of
FIG. 6.
Referring now to the drawings for a more detailed description of the present invention, an electric dry shaver is generally indicated by the reference numeral 10 in FIG. 1 to 3. Shaver 10 includes a casing made of a hard plastic material and comprises a main body section 11 annd a hairpocket section 12. Hairpocket 12 is detachably mounted on main casing section in a well-known manner such as by spring biased releasable detent (not shown).
A motor (not shown) is provided within main body portion 11 for operating an auxiliary trimmer device 14 and a main cutter head assembly generally indicated by the reference numeral 15.
Cutter head assembly 15 includes an outer cutter comprising a generally rectangular flexible foil member 16 having spaced marginal portions 17 and 18 (FIG. 3) secured to spaced sidewall portions 19 and 20 of hairpocket 12 in any well-known manner (not shown). The foil 16 is made of nickel by an electroforming process and is provided with a plurality of apertures 22 for combing hair bristles into the cutter head 15. Foil 16 in mounted position on casing section 11 includes spaced arcuate shaped bowed cutting rows 23 and 24. Rows 23 and 24 are spaced one from the other by a bar member 26 which extends longitudinally across hairpocket 12. Rows 23 and 24 are maintained in arcuate shape by the engagement of movable inner cutter assembly 28 with the undersurface of the foil 16.Inner cutter assembly 28 is operable by a motor drive arm 13 in a manner to be hereinafter explained in further detail.
Inner cutter assembly 28 comprises a plurality of spaced metal blades 29 each having a pair of arcuate shaped cutting edges 30 and 32. Rods 33 interconnect blades 29 in aligned relationship and which blades 29 are mounted on a support member 34. Support member 34 comprises a rectangular shaped frame having detent fingers 35 in locking engagement with lower rods 33 of inner cutter assembly 28 to maintain inner cutter blades 29 securely thereon.
A spring 36 located around drive arm 13 engages the undersurface of support 34 and urges inner cutter assembly 28 and aligned arcuate cutting edges 30 and 32 into engagement with the undersurface of foil cutting rows 23 and 24 respectively.
Means are provided for mounting inner cutter assembly 28 on motor drive arm 13 (FIGS. 2 and 3). To this end support member 34 is provided with a rectangular shaped drive slot 37 at the central portion thereof. Drive arm 13 includes an arcuate shaped rounded drive head 38 mounted in drive slot 37 with the forward and rear surfaces 39 and 40 thereof (FIG. 2) in contact with endwalls 41 and 42 of slot 37. The side surfaces of drive head 38 are spaced from sidewalls 43-44. of slot 37 to allow for either sideways or rotative movement of support 34 about head 38 without the latter losing contact with the endwalls of 41 and 42 of slot 37. Spaced detent tabs 45 are provided on the lower portions of endwalls 41-42 to prevent upward release of support member 34 from drive arm 13 in the direction of arrow A in FIG. 2.In order to remove support 34 from drive head 38 hairpocket 12 must be removed from casing section 11.
Support 34 is then rotated from the position shown in FIG. 7 to a position whereat the tabs 45 are rotated free of the rounded ends of head 38 whereby support 34 may be lifted from drive arm 13.
The tabs 45 prevent release of the support 34 from the drive head upon a swiveling movement of less than 45" of the support with respect to the drive arm.
In operation of shaver 10 as support member 34 is reciprocated by drive arm 13 in a linear direction as foil 16 is pressed against the user's skin support member 34 will bend to move downwardly in the direction designed by the arrow B in FIG. 2.
Inner cutter 28 will follow in the direction of the pressure exerted against the foil 16 and against the resilient restraining action of spring 36. Support 34 may also tend to rotate or move sideways about drive head 38 in the downward movement as lateral pressure is exerted against the foil 16. As diagrammatically illustrated in FIGS. 6 and 7 the novel interconnection of drive head 38 to drive slot 37 will allow for constant contact of drive head 38 with endwalls 41-42 of drive slot 37 in any direction of movement of inner cutter 28 as indicated by the arrows c, d. e, f, g. h. i and k as inner cutter 28 is reciprocated.
It will be apparent from the foregoing description that the novel inner cutter mounting means has many advantages in use. One advantage is that inner cutter assembly 28 is securely connected to the drive means 13 without the provision of additional parts or complicated forming of interconnection means. In addition the novel configuration of drive slot 37 and drive head 38 provides for universal movement of inner cutter 28 on drive arm 13 without the latter losing contact therewith or inner cutter 28 with the undersurface of the foil 16 thereby providing for a more efficient shaving action. Another advantage is that the disclosed novel drive connection may be used with a drive arm movable either in a linear or arcuate path in the same manner without loss of efficiency.
WHAT WE CLAIM IS:
1. An electric shaver comprising; a. a flexible outer cutter and a movable inner cutter; b. a support member mounting said inner cutter in shearing engagement with said outer cutter; c. spring means maintaining said inner cutter in said shearing engagement; d. a motor operated drive arm in driving engagement with said support member, said drive arm operable for driving said inner cutter relative to said outer cutter; and e. means provided on said drive arm and said support member for universal swiveling and lateral movements of said support member relative to said drive arm upon flexing movement of said outer cutter.
2. The shaver of Claim 1 wherein said means for universal swiveling and lateral movement of the support member relative to the drive arm include an arcuate-shaped drive head at a terminal end of said drive arm and a rectangular-shaped drive slot formed in said support member.
3. The shaver of Claim 2 wherein arcuate-shaped portions of said drive head are in continuous contact with first wall portions of said drive slot during movement of said inner cutter relative to said outer cutter and during flexing movement of said outer cutter, and said first wall portions of the drive slot pivot in a universal swiveling movement about said arcuate-shaped portions of the drive head.
4. The shaver of Claim 3 wherein other portions of said drive head are spaced from other wall portions of said drive slot and during flexing movement of the outer cutter said support member moves laterally in the direction of said spacing.
5. The shaver of Claim 2 or 3 or 4 wherein detent tabs provided on spaced lower wall portions of said drive slot prevent upward release of the support member from the drive head and whereby the support member is released from the drive arm upon rotation of the support member to a position whereat said detent tabs are rotated free of said drive head.
6. An electric shaver comprising; a. a flexible bow-shaped foil outer cutter; b. an inner cutter having arcuate-shaped cutter blades; c. a frame for supporting said cutter blades and having a rectangular-shaped drive slot formed therein, said drive slot being formed with spaced endwalls and spaced sidewalls; d. spring means engaging said support frame to both urge said inner cutter into shearing engagement with said foil outer cutter and to permit downward or lateral flexing movement of said foil outer cutter upon external pressure being applied thereto e. an elongated motor operated drive arm extending from said motor having a longitudinal axis and terminating in a drive head disposed within said drive slot, said drive head having rounded opposite end surfaces, said end surfaces being in driving contact with opposed portions of said endwalls; and f. said side surfaces of the drive head being
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (9)
1. An electric shaver comprising; a. a flexible outer cutter and a movable inner cutter; b. a support member mounting said inner cutter in shearing engagement with said outer cutter; c. spring means maintaining said inner cutter in said shearing engagement; d. a motor operated drive arm in driving engagement with said support member, said drive arm operable for driving said inner cutter relative to said outer cutter; and e. means provided on said drive arm and said support member for universal swiveling and lateral movements of said support member relative to said drive arm upon flexing movement of said outer cutter.
2. The shaver of Claim 1 wherein said means for universal swiveling and lateral movement of the support member relative to the drive arm include an arcuate-shaped drive head at a terminal end of said drive arm and a rectangular-shaped drive slot formed in said support member.
3. The shaver of Claim 2 wherein arcuate-shaped portions of said drive head are in continuous contact with first wall portions of said drive slot during movement of said inner cutter relative to said outer cutter and during flexing movement of said outer cutter, and said first wall portions of the drive slot pivot in a universal swiveling movement about said arcuate-shaped portions of the drive head.
4. The shaver of Claim 3 wherein other portions of said drive head are spaced from other wall portions of said drive slot and during flexing movement of the outer cutter said support member moves laterally in the direction of said spacing.
5. The shaver of Claim 2 or 3 or 4 wherein detent tabs provided on spaced lower wall portions of said drive slot prevent upward release of the support member from the drive head and whereby the support member is released from the drive arm upon rotation of the support member to a position whereat said detent tabs are rotated free of said drive head.
6. An electric shaver comprising; a. a flexible bow-shaped foil outer cutter; b. an inner cutter having arcuate-shaped cutter blades; c. a frame for supporting said cutter blades and having a rectangular-shaped drive slot formed therein, said drive slot being formed with spaced endwalls and spaced sidewalls; d. spring means engaging said support frame to both urge said inner cutter into shearing engagement with said foil outer cutter and to permit downward or lateral flexing movement of said foil outer cutter upon external pressure being applied thereto e. an elongated motor operated drive arm extending from said motor having a longitudinal axis and terminating in a drive head disposed within said drive slot, said drive head having rounded opposite end surfaces, said end surfaces being in driving contact with opposed portions of said endwalls; and f. said side surfaces of the drive head being
spaced from the sidewalls of said drive slot allowing universal swiveling and lateral movements of said inner cutter about the longitudinal axis of said drive arm upon said downward or lateral flexing movement of the foil outer cutter.
7. The shaver of Claim 6 wherein detent means formed on spaced lower wall portions of said drive slot include a portion of each of said endwalls projecting into the drive slot in the direction of the drive arm. said projecting portions are adapted for release from said drive arm upon rotation with respect to the drive head whereby said projecting portions are rotated free of said rounded end surfaces.
8. The shaver of Claim 7 wherein said detent means prevent release of said support frame from said drive head upon a swiveling movement of less than 45" of the support frame with respect to the drive arm.
9. An electric dry shaver substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US75993377A | 1977-01-17 | 1977-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1570462A true GB1570462A (en) | 1980-07-02 |
Family
ID=25057508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5048977A Expired GB1570462A (en) | 1977-01-17 | 1977-12-05 | Electric dry shavers |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE2801267A1 (en) |
| GB (1) | GB1570462A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2263880A (en) * | 1992-02-07 | 1993-08-11 | Remington Products | Multiple foil and cutting blade assembly for dry shavers |
| WO2022264122A1 (en) * | 2021-06-13 | 2022-12-22 | Hybrid Razor Ltd. | Multi-cutting element shaving devices |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2908970A (en) * | 1953-01-12 | 1959-10-20 | Max Braun | Shearing head for dry shaver employing flexible shear plate and reciprocating cutter |
| GB784909A (en) * | 1955-02-24 | 1957-10-16 | Willem Bakker | Dry shaver |
| NL91371C (en) * | 1956-01-17 | |||
| US2900719A (en) * | 1956-08-24 | 1959-08-25 | Supreme Products Corp | Cutters for electric shavers |
| DE1177976B (en) * | 1962-12-05 | 1964-09-10 | Lang Geb | Shaving head for hair clippers, preferably for electric razors |
| US3376636A (en) * | 1966-11-28 | 1968-04-09 | Sunbeam Corp | Shaving head for electric dry shaver |
| US3783508A (en) * | 1970-08-14 | 1974-01-08 | Gillette Co | Electric shavers |
| CA960753A (en) * | 1972-10-11 | 1975-01-07 | David R. Boothman | Detector for reverse and open phase in a three phase circuit |
| US4001933A (en) * | 1975-06-04 | 1977-01-11 | Sperry Rand Corporation | Cutter drive arrangement for an electric dry shaver |
-
1977
- 1977-12-05 GB GB5048977A patent/GB1570462A/en not_active Expired
-
1978
- 1978-01-10 DE DE19782801267 patent/DE2801267A1/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2263880A (en) * | 1992-02-07 | 1993-08-11 | Remington Products | Multiple foil and cutting blade assembly for dry shavers |
| GB2263880B (en) * | 1992-02-07 | 1995-07-19 | Remington Products | Multiple foil and cutting blade assembly for electric dry shavers |
| AU661880B2 (en) * | 1992-02-07 | 1995-08-10 | Rovcal, Inc. | Multiple foil and cutting blade assembly for electric dry shavers |
| RU2122491C1 (en) * | 1992-02-07 | 1998-11-27 | Ремингтон Продактс, Инк. | Electric-powered shaver and cutting system for electric-powered shaver |
| WO2022264122A1 (en) * | 2021-06-13 | 2022-12-22 | Hybrid Razor Ltd. | Multi-cutting element shaving devices |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2801267A1 (en) | 1978-07-20 |
| DE2801267C2 (en) | 1991-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |
Effective date: 19971204 |