Patent US3984890A successfully refreshed from Google Patents.
US3984890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric tooth brush
Assignee: Individual
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Filing: 1975-06-25
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Granted: 1976-10-12
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Expires: 1995-06-25
Abstract
Abstract This is an electro-mechanical tooth brush having opposed sets of bristles specifically designed to simultaneously brush both the inner and outer surfaces of the teeth by reciprocating one set back and forth, and also having a central hub element for brushing the chewing surfaces of the teeth fixed to and moving with the reciprocating set of bristles.
Inventors
- 👤 George C. Collis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:18
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/16; A61C17/22; A61C17/32; A61C17/34; A61C17/3409; A61C17/3445; A46; A46B; A46B9/00; A46B9/02; A46B9/04; A46B9/045; A61C17/349; A46B2200/00; A46B2200/10; A46B2200/1066; A46B5/00; A46B5/002; A46B5/0025
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
An electro-mechanically reciprocated tooth brush comprising, a casing, an electric motor housed within said casing, a reciprocating rod slidably mounted at one end of casing for back and forth movement therein, means associated with said electric motor and said casing for producing back and forth reciprocation of said rod when said motor is energized, stationary bristles concentrically surrounding the axis of said rod in radially outwardly spaced relation thereto and mounted in fixed relation to said end of said casing, reciprocating bristles fixed to said rod in generally opposed relation to said stationary bristles for back and forth movement relative to said stationary bristles to simultaneously brush the inner and outer surfaces of the teeth positioned between said stationary and reciprocating bristles.
Claim 2
Dependent Claim
122 words
An electro-mechanically reciprocated tooth brush comprising, a casing, an electric motor housed within said casing, a reciprocating rod slidably mounted at one end of casing for back and forth movement therein, means associated with said electric motor and said casing for producing back and forth reciprocation of said rod when said motor is energized, stationary bristles concentrically surrounding the axis of said rod in radially outwardly spaced relation thereto and mounted in fixed relation to said end of said casing, reciprocating bristles fixed to said rod in generally opposed relation to said stationary bristles for back and forth movement relative to said stationary bristles to simultaneously brush the inner and outer surfaces of the teeth positioned between said stationary and reciprocating bristles.
Claim 3
Dependent Claim
47 words
The structure set forth in claim 1 and a sleeve fixed to said rod and positioned between said bristles and having cylindrical bristles fixed thereto for reciprocation with said rod to simultaneously brush the biting surfaces of the teeth during brushing of the inner and outer surfaces.
Claim 4
Dependent Claim
21 words
The structure set forth in claim 2 wherein said reciprocating bristles are disposed further from said casing than said stationary bristles.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |