Patent US4833448A successfully refreshed from Google Patents.
US4833448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warning device to alert passers-by before opening an automobile door
Assignee: Individual
•
Filing: 1988-06-14
•
Granted: 1989-05-23
•
Expires: 2008-06-14
Abstract
Abstract A warning device for alerting passers-by, particularly oncoming motorists, before opening an automobile door will be installed on an automobile to produce a warning sign visible by passers-by. The device includes a door lock for locking and unlocking an automobile door, a door lock switch operable in association with the door lock, a relay operable by the door lock switch to turn on warning lights installed at the front end and rear end of the automobile, and a blinker for causing the warning lights to blink.
Inventors
- 👤 Jih-Cheng Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:35
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/50; B60Q1/52; B60Q1/32; B60Q1/323; B60Q1/324
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
420 words
A warning device to alert passers-by before opening an automobile door, comprising: (a) right side turn signal lights and left side turn signal lights connected to a battery through a turn signal control switch and a blinker; (b) a right side brake light and a left side brake light; (c) a right side door lock installed on a right side door of the automobile; (d) a left side door lock installed on a left side door of the automobile; (e) a right side door lock switch operable in association with said right side door lock to be turned on when said right side door lock is unlocked; (f) a left side door lock switch operable in association with said left side door lock to be turned on when said left side door lock is unlocked; (g) a right side relay and a left side relay, each one of said right side relay and left side relay having a first switch, a second switch, a third switch, and a solenoid for operating said first switch, second switch and third switch in such a manner that when said solenoid is deenergized, said first switch and second switch are caused to open and said third switch is caused to close, and when said solenoid is energized, said first switch and second switch are caused to close and said third switch is caused to open; said solenoid of said right side relay being electrically operable by said right side door lock switch, and said solenoid of said left side relay being electrically operable by said left side door lock switch; wherein said right side turn signal lights are connected to said battery through said first switch of said right side relay and said blinker; said right side brake light is connected to said battery through two parallel routes of which one is a series connection of said second switch of said right side relay and said blinker, and another is a series connection of said third switch of said left side relay and a brake light switch; and said left side turn signal lights are connected to said battery through said first switch of said left side relay and said blinker; said left side brake light is connected to said battery through two parallel routes of which one is a series connection of said second switch of said left side relay and said blinker, and another is a series connection of said third switch of said right side relay and said brake light switch.
Claim 2
Dependent Claim
420 words
A warning device to alert passers-by before opening an automobile door, comprising: (a) right side turn signal lights and left side turn signal lights connected to a battery through a turn signal control switch and a blinker; (b) a right side brake light and a left side brake light; (c) a right side door lock installed on a right side door of the automobile; (d) a left side door lock installed on a left side door of the automobile; (e) a right side door lock switch operable in association with said right side door lock to be turned on when said right side door lock is unlocked; (f) a left side door lock switch operable in association with said left side door lock to be turned on when said left side door lock is unlocked; (g) a right side relay and a left side relay, each one of said right side relay and left side relay having a first switch, a second switch, a third switch, and a solenoid for operating said first switch, second switch and third switch in such a manner that when said solenoid is deenergized, said first switch and second switch are caused to open and said third switch is caused to close, and when said solenoid is energized, said first switch and second switch are caused to close and said third switch is caused to open; said solenoid of said right side relay being electrically operable by said right side door lock switch, and said solenoid of said left side relay being electrically operable by said left side door lock switch; wherein said right side turn signal lights are connected to said battery through said first switch of said right side relay and said blinker; said right side brake light is connected to said battery through two parallel routes of which one is a series connection of said second switch of said right side relay and said blinker, and another is a series connection of said third switch of said left side relay and a brake light switch; and said left side turn signal lights are connected to said battery through said first switch of said left side relay and said blinker; said left side brake light is connected to said battery through two parallel routes of which one is a series connection of said second switch of said left side relay and said blinker, and another is a series connection of said third switch of said right side relay and said brake light switch.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |