US5590468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Movable blade shaving cartridge with conditioning bar
Assignee: American Safety Razor Co
•
Filing: 1995-06-07
•
Granted: 1997-01-07
•
Expires: 2015-06-07
Abstract
Abstract A movable blade cartridge including a platform member having a blade seat and a guard member. The guard member is located of forward and parallel to the blade seat so as to form a longitudinal slot between the blade seat and the guard member. A primary blade which is disposed on the blade seat such that the cutting edge of the blade is located rearwardly of the guard member. A substantial portion of the primary blade extends into the slot formed between the guard member and the blade seat such that the blade is flexible into the slot. The guard member further comprises a plurality of upwardly extending protrusions which function as a conditioning bar and engage the shaving surface prior to the shaving process. A spacer is located on the upper surface of the primary blade. The spacer comprises a rear portion which functions to separate the primary blade and a secondary blade, as well as a forward portion which extends from the rear portion and functions to prevent upward movement of the primary blade, and create an opening beneath the forward portion of the spacer and the lower surface of the secondary blade. Both the primary and secondary blade are manufactured and mounted so as to be flexible in response to forces encountered during the shaving operation.
Inventors
- 👤 Frank H. Prochaska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:29
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/08; B26B21/14; B26B21/22
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
125 words
A flexible blade cartridge comprising a platform member defining a guard member and a cap member, a spacer and a blade means, wherein, said blade means comprises a blade a forward and rearward section, said forward portion of said blade being flexible to a less aggressive position in response to applied shaving forces, said blade being flexible about its longitudinal axis, said rearward section of said blade permanently fixed between said guard member and said cap member, said guard comprising a plurality of protrusions extending upwardly from an upper surface of said guard member, each of said protrusions having a longitudinal axis which extends substantially perpendicular to a front edge of said guard member, and each of said protrusions having a substantially elongated oval shape.
Claim 2
Dependent Claim
125 words
A flexible blade cartridge comprising a platform member defining a guard member and a cap member, a spacer and a blade means, wherein, said blade means comprises a blade a forward and rearward section, said forward portion of said blade being flexible to a less aggressive position in response to applied shaving forces, said blade being flexible about its longitudinal axis, said rearward section of said blade permanently fixed between said guard member and said cap member, said guard comprising a plurality of protrusions extending upwardly from an upper surface of said guard member, each of said protrusions having a longitudinal axis which extends substantially perpendicular to a front edge of said guard member, and each of said protrusions having a substantially elongated oval shape.
Claim 3
Dependent Claim
27 words
A flexible blade cartridge according to claim 1, wherein said plurality of protrusions are aligned to form a single row, said protrusions having substantially the same height.
Claim 4
Dependent Claim
25 words
A flexible blade cartridge according to claim 2, wherein each of said protrusions are approximately 0.020 inches to 0.060 inches apart from an adjacent protrusion.
Claim 5
Dependent Claim
28 words
A flexible blade cartridge according to claim 1, wherein said plurality of protrusions are aligned to form a plurality of rows, said protrusions having substantially the same height.
Claim 6
Dependent Claim
28 words
A flexible blade cartridge according to claim 1, wherein said guard member and said plurality of protrusions are formed as a single unitary member comprising a single material.
Claim 7
Dependent Claim
25 words
A flexible blade cartridge according to claim 5, wherein said single material forming said guard member and said plurality of protrusions is a polypropylene material.
Claim 8
Dependent Claim
41 words
A flexible blade cartridge according to claim 1, wherein said platform member comprises a first locking means, said guard member comprises a second locking means, said first and second locking means operating to secure said guard member to said platform member.
Claim 9
Dependent Claim
22 words
A flexible blade cartridge according to claim 1, wherein each of said plurality of protrusions comprises a plurality of skin engaging sites.
Claim 10
Dependent Claim
28 words
A flexible blade cartridge according to claim 8, wherein each of said skin engaging sites comprises an edge which functions to increase skin tension during the shaving process.
Claim 11
Dependent Claim
137 words
A flexible blade cartridge comprising a platform member defining a guard member and a cap member, a spacer and a blade means, wherein, said blade means comprises a blade a forward and rearward section, said forward portion of said blade being flexible to a less aggressive position in response to applied shaving forces, said blade being flexible about its longitudinal axis, said rearward section of said blade permanently fixed between said guard member and said cap member, said guard comprising a plurality of protrusions extending upwardly from an upper surface of said guard member, each of said plurality of protrusions comprising a plurality of skin engaging sites, each of said protrusions having a longitudinal axis which extends substantially perpendicular to a front edge of said blade, and each of said protrusions having a substantially elongated oval shape.
Claim 12
Dependent Claim
137 words
A flexible blade cartridge comprising a platform member defining a guard member and a cap member, a spacer and a blade means, wherein, said blade means comprises a blade a forward and rearward section, said forward portion of said blade being flexible to a less aggressive position in response to applied shaving forces, said blade being flexible about its longitudinal axis, said rearward section of said blade permanently fixed between said guard member and said cap member, said guard comprising a plurality of protrusions extending upwardly from an upper surface of said guard member, each of said plurality of protrusions comprising a plurality of skin engaging sites, each of said protrusions having a longitudinal axis which extends substantially perpendicular to a front edge of said blade, and each of said protrusions having a substantially elongated oval shape.
Claim 13
Dependent Claim
28 words
A flexible blade cartridge according to claim 10, wherein each of said skin engaging sites comprises an edge which functions to increase skin tension during the shaving process.
Claim 14
Dependent Claim
27 words
A flexible blade cartridge according to claim 11, wherein said plurality of protrusions are aligned to form a single row, said protrusions having substantially the same height.
Claim 15
Dependent Claim
25 words
A flexible blade cartridge according to claim 12, wherein each of said protrusions are approximately 0.020 inches to 0.060 inches apart from an adjacent protrusion.
Claim 16
Dependent Claim
28 words
A flexible blade cartridge according to claim 10, wherein said guard member and said plurality of protrusions are formed as a single unitary member comprising a single material.
Claim 17
Dependent Claim
25 words
A flexible blade cartridge according to claim 14, wherein said single material forming said guard member and said plurality of protrusions is a polypropylene material.
Claim 18
Dependent Claim
41 words
A flexible blade cartridge according to claim 15, wherein said platform member comprises a first locking means, said guard member comprises a second locking means, said first and second locking means operating to secure said guard member to said platform member.
Claim 19
Dependent Claim
118 words
A flexible blade cartridge comprising a platform member defining a guard member and a cap member, a spacer and a blade means, wherein, said blade means comprises a blade a forward and rearward section, said forward portion of said blade being flexible to a less aggressive position in response to applied shaving forces, said blade being flexible about its longitudinal axis, said rearward section of said blade permanently fixed between said guard member and said cap member, said guard comprising a plurality of protrusions extending upwardly from an upper surface of said guard member, each of said plurality of protrusions has substantially a conical shape and exhibits a height to base ratio ranging from approximately 3:1 to 1:1.
Claim 20
Dependent Claim
118 words
A flexible blade cartridge comprising a platform member defining a guard member and a cap member, a spacer and a blade means, wherein, said blade means comprises a blade a forward and rearward section, said forward portion of said blade being flexible to a less aggressive position in response to applied shaving forces, said blade being flexible about its longitudinal axis, said rearward section of said blade permanently fixed between said guard member and said cap member, said guard comprising a plurality of protrusions extending upwardly from an upper surface of said guard member, each of said plurality of protrusions has substantially a conical shape and exhibits a height to base ratio ranging from approximately 3:1 to 1:1.
Claim 21
Dependent Claim
140 words
A flexible blade cartridge comprising a platform member defining a guard member and a cap member, a spacer and a blade means, wherein, said blade means comprises a blade a forward and rearward section, said forward portion of said blade being flexible to a less aggressive position in response to applied shaving forces, said blade being flexible about its longitudinal axis, said rearward section of said blade permanently fixed between said guard member and said cap member, said guard comprising a plurality of protrusions extending upwardly from an upper surface of said guard member, said protrusions having substantially the same height and aligned to form a single row, said protrusions alternating between protrusions that extend across the entire upper surface of said guard member and protrusions that extend only across a portion of the upper surface of said guard member.
Claim 22
Dependent Claim
140 words
A flexible blade cartridge comprising a platform member defining a guard member and a cap member, a spacer and a blade means, wherein, said blade means comprises a blade a forward and rearward section, said forward portion of said blade being flexible to a less aggressive position in response to applied shaving forces, said blade being flexible about its longitudinal axis, said rearward section of said blade permanently fixed between said guard member and said cap member, said guard comprising a plurality of protrusions extending upwardly from an upper surface of said guard member, said protrusions having substantially the same height and aligned to form a single row, said protrusions alternating between protrusions that extend across the entire upper surface of said guard member and protrusions that extend only across a portion of the upper surface of said guard member.
References Cited (Backward Citations)
US30913A
Cited
US2040345A
Cited
US2068085A
Cited
US2548959A
Cited
US2766521A
Cited
US3138865A
Cited
US3939560A
Cited
US4069580A
Cited
US4409735A
Cited
US4168571A
Cited
US4126601A
Cited
US4189832A
Cited
US4443940A
Cited
US4335508A
Cited
US4251914A
Cited
US4270268A
Cited
USRE30913E
Cited
US4302876A
Cited
US4502217A
Cited
US4403412A
Cited
US4389773A
Cited
US4459744A
Cited
US4443939A
Cited
US4461079A
Cited
US4574476A
Cited
US4516320A
Cited
US4535537A
Cited
US4720917A
Cited
US4741103A
Cited
US4709477B1
Cited
US4709477A
Cited
US4964214A
Cited
US5031316A
Cited
US4854043A
Cited
US4976028A
Cited
US5003694A
Cited
US4932122A
Cited
US4845848A
Cited
US4893641A
Cited
US5191712A
Cited
US4942662A
Cited
US5074042A
Cited
US4993154A
Cited
US5224267A
Cited
US5056222A
Cited
US5067238A
Cited
US5347716A
Cited
US5388332A
Cited
US5185927A
Cited
US5222300A
Cited
US5251376A
Cited
US5253420A
Cited
US5313706A
Cited
US5199173A
Cited
US5205040A
Cited
US5249361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-01-07 | 2000-07-08 | 2001-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-07 | 2004-07-08 | 2005-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-07 | 2008-07-08 | 2009-01-07 | $7700.00 | Window Closed / Lapsed |