US3859684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush
Assignee: Individual
•
Filing: 1973-06-18
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Granted: 1975-01-14
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Expires: 1993-06-18
Abstract
Abstract An electrically operated toothbrush that includes a rotary brush which rotates selectively in either direction in order to give a proper brushing action, the toothbrush including a reversible motor inside the handle controlled by a manually operated switch upon the handle, and the rotary brush being shielded along one side so to protect the mouth tissue such as tongue and cheeks from a rear side of the brush.
Inventors
- 👤 John A Moskwinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:32
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/16; A61C17/22; A61C17/24; A61C17/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
In a brush, the combination of a hollow handle with a reversible electric motor therein connectable to a power source, an off-forward-reverse switch on said handle, and means carried by said handle for providing a tooth brushing action, said means comprising a rotary brush on a motor shaft of said motor, a portion of said motor shaft being protectively enclosed in a tubular sheath, said sheath projecting from a position within said handle toward said brush, a universal joint along said motor shaft being located between said motor and said sheath, a handle slot through which said shaft and sheath protrude outwardly of said handle, said sheath in a vicinity of said slot being crosssectionally non-circular to prevent rotation therein about a longitudinal axis of said sheath, a second switch inside said handle being aligned with said slot to be depressed by said sheath when pivoted on said universal joint toward one side, said second switch being in series circuit with the first said switch, motor and said power source for automatically opening and closing said circuit.
Claim 2
Dependent Claim
177 words
In a brush, the combination of a hollow handle with a reversible electric motor therein connectable to a power source, an off-forward-reverse switch on said handle, and means carried by said handle for providing a tooth brushing action, said means comprising a rotary brush on a motor shaft of said motor, a portion of said motor shaft being protectively enclosed in a tubular sheath, said sheath projecting from a position within said handle toward said brush, a universal joint along said motor shaft being located between said motor and said sheath, a handle slot through which said shaft and sheath protrude outwardly of said handle, said sheath in a vicinity of said slot being crosssectionally non-circular to prevent rotation therein about a longitudinal axis of said sheath, a second switch inside said handle being aligned with said slot to be depressed by said sheath when pivoted on said universal joint toward one side, said second switch being in series circuit with the first said switch, motor and said power source for automatically opening and closing said circuit.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |