Patent US3740841A successfully refreshed from Google Patents.
US3740841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety razor embodying blade pressure control
Assignee: Philip Morris USA Inc
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Filing: 1971-03-25
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Granted: 1973-06-26
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Expires: 1991-03-25
Abstract
Abstract The disclosure introduces a new concept in safety razor construction; that of the floating head. A floating head is herein defined as a blade support assembly which is mounted for movement transverse to the path of movement undergone by the pressure guard. A safety razor utilizing a floating head construction of the type herein described is insensitive not only to variations in the application of handle pressure but also to the angle at which the razor is held relative to the skin. A biased blade support assembly, comprising the floating head, is mounted for controlled pivotal movement toward and away from a skin pressure guard integral with the razor handle whereby a constant blade pressure will be exerted on the skin irrespective of the pressure exerted on the handle and pressure guard.
Inventors
- 👤 F Risher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:00
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/08; B26B21/14; B26B21/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
90 words
A safety razor comprising a handle assembly having a main skin pressure guard fixed thereto, a blade support having a blade secured therein and an auxiliary skin guard arranged adjacent the blade cutting edge, said support blade and auxiliary guard being mounted for floating movement toward and away from said main guard and including biasing means urging the support and blade toward the main guard but permitting movement away from the main guard when the force imposed thereon by pressure of the razor against the skin exceeds a predetermined amount.
Claim 2
Dependent Claim
90 words
A safety razor comprising a handle assembly having a main skin pressure guard fixed thereto, a blade support having a blade secured therein and an auxiliary skin guard arranged adjacent the blade cutting edge, said support blade and auxiliary guard being mounted for floating movement toward and away from said main guard and including biasing means urging the support and blade toward the main guard but permitting movement away from the main guard when the force imposed thereon by pressure of the razor against the skin exceeds a predetermined amount.
Claim 3
Dependent Claim
27 words
A safety razor in accordance with claim 1 in which said auxiliary guard is arranged to engage said main guard under the urging of said biasing means.
Claim 4
Dependent Claim
17 words
A safety razor in accordance with claim 1 in which said biasing means comprises an elastic member.
Claim 5
Dependent Claim
16 words
A safety razor in accordance with claim 2 in which said elastic member comprises a spring.
Claim 6
Dependent Claim
16 words
A safety razor in accordance with claim 1 in which said biasing means comprises magnetic means.
Claim 7
Dependent Claim
35 words
A safety razor in accordance with claim 1 in which said blade support includes an outer cap member spaced rearwardly of the blade cutting edge and adapted in normal shaving operation to contact the skin.
Claim 8
Dependent Claim
20 words
A safety razor in accordance with claim 1 in which said blade support is pivotally mounted on the handle assembly.
Claim 9
Dependent Claim
28 words
A safety razor in accordance with claim 6 in which said biasing means comprises a coil spring arranged to urge the blade support toward said main pressure guard.
Claim 10
Dependent Claim
34 words
A safety razor in accordance with claim 1 in which said biasing means has an effective force urging the blade support toward the main guard in the range of about 50 to 200 grams.
Claim 11
Dependent Claim
23 words
A safety razor in accordance with claim 1 in which said blade support is constructed to enable the ready replacement of blades therein.
Claim 12
Dependent Claim
140 words
A safety razor comprising a handle assembly including a main skin pressure guard fixed therein having a skin engaging surface, a blade support assembly pivotally mounted on said handle for floating movement toward and away from said main pressure guard, said blade support assembly including a blade and an auxiliary guard arranged underneath the blade adjacent to but spaced rearwardly of the blade cutting edge and an outer cap member overlying the blade and spaced rearwardly thereof, and spring biasing means for biasing said blade support assembly toward said main pressure guard for positioning the blade edge in spaced juxtaposed shaving position relative to said main skin engaging surface whereby as said main skin engaging surface is further depressed into the skin said blade support assembly including the blade cutting edge may move away from said main skin engaging surface.
Claim 13
Dependent Claim
140 words
A safety razor comprising a handle assembly including a main skin pressure guard fixed therein having a skin engaging surface, a blade support assembly pivotally mounted on said handle for floating movement toward and away from said main pressure guard, said blade support assembly including a blade and an auxiliary guard arranged underneath the blade adjacent to but spaced rearwardly of the blade cutting edge and an outer cap member overlying the blade and spaced rearwardly thereof, and spring biasing means for biasing said blade support assembly toward said main pressure guard for positioning the blade edge in spaced juxtaposed shaving position relative to said main skin engaging surface whereby as said main skin engaging surface is further depressed into the skin said blade support assembly including the blade cutting edge may move away from said main skin engaging surface.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |