Cutlery – Razors – Combined
Reexamination Certificate
2003-01-27
2004-07-20
Goodman, Charles (Department: 3724)
Cutlery
Razors
Combined
C030S125000
Reexamination Certificate
active
06763590
ABSTRACT:
BACKGROUND
1. Field of the Invention
The present disclosure relates to a shaving system having a fluid shaving aid, such as a skin lubricant, for improving the ease and comfort with which a razor can be drawn across the skin during the shaving process as well as providing skin care topicals. More particularly, the present disclosure relates to a shaving system having a clutch operated system for the controlled ejection of shaving aid.
2. Background of the Prior Art
It is known that many factors contribute to overall discomfort during the shaving process. Such factors include excessive frictional drag of the razor across the skin and the inflammation of the skin caused by various known epidermal conditions such as psoriasis, eczema, acne, skin rashes, etc. Efforts to address some of these factors have led to the use of pre-shave and/or after shave lotions which include emollients, beard softening agents, lathering agents, medicinal or soothing ointments, aloe, foam, soaps, and the like. Even though shaving comfort may be enhanced to some degree using emollients and other shaving aids, the requirement that they be applied before or after shaving tends to decrease their overall effectiveness and simply adds to the complications of the shaving process.
Shaving systems also use lubricants to decrease the frictional resistance during shaving. For example, static lubricating systems integrated with or attached to the razor cartridge are well known and help reduce the frictional drag of the razor as it is drawn across the skin. Such systems include lubricating strips affixed to the razor head proximate the razor cap portion. The lubricating strips typically include a water-insoluble polymer (such as polystyrene) and a water-soluble shaving aid such as polyethylene oxide, which gradually leaches out of the strip during shaving and reduces frictional drag. However, a problem with such systems is that the shaving aid leaches out in a skewed manner over time. At first, more than enough shaving aid leaches out. But after repeated use of the razor, less and less shaving aid leaches out. This results in the inefficient use of the limited quantity of shaving aid which can be incorporated into the lubricant strip. Moreover, the surface of the strip may become irregular and rough after repeated use, thereby increasing the coefficient of friction of the strip. This might contribute to further irritation of sensitive skin.
As a result, various attempts have been made to develop new systems for delivering shaving aid during the shaving process. However, such efforts have for the most part been only partially successful in their ability to consistently and evenly deliver shaving aid to the skin over time and repeated use of the razor.
Accordingly, there yet exists a need for a simple but effective shaving system which incorporates a system for effectively delivering a desired amount of shaving aid automatically or selectively by a user over the course of the normal and expected useful life of the razor blade.
SUMMARY OF THE INVENTION
A shaving aid delivery system for a razor assembly is provided herein. The shaving aid delivery system comprises
a cartridge assembly having a reservoir for storing a fluid shaving aid, and means for communicating the shaving aid to a shaving surface of the cartridge assembly; (b) piston assembly movable from a first position to a second position for driving shaving aid from the reservoir to the shaving surface, the piston assembly being biased to the second position; (c) clutch assembly for controlling the movement of the piston means, the dutch assembly being movable between an engaged position wherein the movement of the piston assembly is prevented and a released position wherein the movement of the piston assembly is permitted, the clutch assembly being movable to the released position in response to a force applied to the shaving surface of the cartridge.
The shaving aid delivery system is advantageously responsive to the normal forces applied during the shaving process to delivery shaving aid to the shaving surface when needed.
REFERENCES:
patent: 4238882 (1980-12-01), Harrison, Sr.
patent: 4270268 (1981-06-01), Jacobson
patent: 5168628 (1992-12-01), Mock et al.
patent: 5224267 (1993-07-01), Simms et al.
patent: 5251376 (1993-10-01), Althaus et al.
patent: 5253420 (1993-10-01), Althaus et al.
patent: 5369885 (1994-12-01), Ferraro
patent: 5384961 (1995-01-01), Gregory
patent: 5416974 (1995-05-01), Wain
Guimont Raymond
Liu Hao-Chih
Swanson Matthew
Tao Ye
Eveready Battery Company Inc.
Goodman Charles
McCormick Paulding & Huber LLP
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