Patent US3856383A successfully refreshed from Google Patents.
US3856383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rear vision mirror apparatus for automobile
Assignee: ICHIKA IND Ltd
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Filing: 1972-09-25
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Granted: 1974-12-24
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Expires: 1992-09-25
Abstract
Abstract A rear vision mirror apparatus of periscope type to provide a rear field of vision via the roof top of an automobile, comprising; a cylindrical housing fixed to the roof top and having an open rear end sealed tightly by a transparent cover and also having a front lower portion opening into the driver''s chamber at a position close to the front window pane of the automobile; an objective mirror and a reflecting mirror arranged in said housing; and an eye-piece mirror povitably secured below said open front lower portion, that lowermost end part of the housing located in the immediate foreground of said transparent cover being provided with a rearward open portion communicating with the driver''s chamber. By actuating the defroster provided on the automobile, the heated air ascending along with the front window pane enters into the housing through the open front lower portion and contacts the inner face of the transparent cover and exits into the driver''s chamber through said rearward open portion of the housing, thus preventing frost from developing on the inner surface of the transparent cover.
Inventors
- 👤 M Yamashita
- 👤 K Ikura
- 👤 M Kushida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:27
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/02; G02B23/08; B; B60; B60R; B60R1/00; B60R1/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
350 words
A rear vision mirror apparatus of the periscope type to provide a rear field of vision via the roof top of an automobile, comprising: a cylindrical housing fixed to the roof top and having an open rear end sealed tightly by a transparent cover and also having a front lower portion opening into the driver''s chamber at a position close to the front window pane of the automobile; an objective mirror and a reflecting mirror operatively arranged in said housing; and an eye-piece mirror pivotably secured below said open front lower portion, the lowermost end part of the housing located in the immediate foreground of said transparent cover being provided with a rearward open portion communicating with the driver''s chamber, and of sufficient size for a person to manually clean said transparent cover, said open front lower portion and said rearward open portion cooperatively forming a passageway for heated air from a defroster, the heated air passing into the housing through said lower front portion thereby preventing frost from forming on said transparent cover, and returning to the interior of said automobile through said rearward open portion; a movable cover member mounted within said rearward open portion and adapted for blocking said passageway and terminating the flow of heated air when the rear field of vision may be clearly viewed through said transparent cover, the portion of the device applied to the inner surface of the roof of the automobile forming a space for the accommodation of said cover member, said cover member being slidably insertable within said space so that, by sliding this cover member, the rearward open portion may be blocked and unblocked; a light attrition filter and a stay for pivotally securing said eyepiece mirror to the housing, said stay having a branched arm to provide a support for the lightattrition filter, one end of said filter being pin-hinged to said support, whereby said filter may assume a selected position between a position transverse to the optical path leading from the reflecting mirror to the eye-piece mirror and a position out of line of said optical path.
Claim 2
Dependent Claim
350 words
A rear vision mirror apparatus of the periscope type to provide a rear field of vision via the roof top of an automobile, comprising: a cylindrical housing fixed to the roof top and having an open rear end sealed tightly by a transparent cover and also having a front lower portion opening into the driver''s chamber at a position close to the front window pane of the automobile; an objective mirror and a reflecting mirror operatively arranged in said housing; and an eye-piece mirror pivotably secured below said open front lower portion, the lowermost end part of the housing located in the immediate foreground of said transparent cover being provided with a rearward open portion communicating with the driver''s chamber, and of sufficient size for a person to manually clean said transparent cover, said open front lower portion and said rearward open portion cooperatively forming a passageway for heated air from a defroster, the heated air passing into the housing through said lower front portion thereby preventing frost from forming on said transparent cover, and returning to the interior of said automobile through said rearward open portion; a movable cover member mounted within said rearward open portion and adapted for blocking said passageway and terminating the flow of heated air when the rear field of vision may be clearly viewed through said transparent cover, the portion of the device applied to the inner surface of the roof of the automobile forming a space for the accommodation of said cover member, said cover member being slidably insertable within said space so that, by sliding this cover member, the rearward open portion may be blocked and unblocked; a light attrition filter and a stay for pivotally securing said eyepiece mirror to the housing, said stay having a branched arm to provide a support for the lightattrition filter, one end of said filter being pin-hinged to said support, whereby said filter may assume a selected position between a position transverse to the optical path leading from the reflecting mirror to the eye-piece mirror and a position out of line of said optical path.
Claim 3
Dependent Claim
70 words
A rear vision mirror apparatus according to claim 1, in which said light-attrition filter has a steel or iron piece at its free end and permanent magnets are provided on the housing at such positions corresponding to the swing of said piece, whereby by having this steel or iron piece of the light-attrition filter attracted to either one of the magnets, the filter can be held in a selected position
Claim 4
Dependent Claim
70 words
A rear vision mirror apparatus according to claim 1, in which the light-attrition filter has a permanent magnet at its free end, and steel or iron pieces are provided on the housing at such positions corresponding to the swing of said piece, whereby by having this permanent magnet of the filter attracted to either one of the steel or iron pieces, the filter can be held in its selected position.
Claim 5
Dependent Claim
90 words
A rear vision mirror apparatus according to claim 1, in which said support of the light-attrition filter protrudes in a direction transversing the open front lower portion of the housing and in which said filter is pin-hinged to the foremost end of said support, whereby even when the light-attrition filter is set at a position transversing the optical path leading from the reflecting mirror to the eye-piece mirror, there is still left by virtue of said support a space through which the heated air from a defroster is passed therethrough.
References Cited (Backward Citations)
US1986405A
Cited
US2525012A
Cited
US2737847A
Cited
US2855242A
Cited
US3043195A
Cited
US3498697A
Cited
US3645607A
Cited
US3773406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |