US3697974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latching warning device for fifth wheel assemblies
Assignee: Fountain City Safety Corp
•
Filing: 1970-10-26
•
Granted: 1972-10-10
•
Expires: 1990-10-26
Abstract
Abstract A safety system is provided for fifth wheel assemblies or other trailer connecting devices which includes several switches connected to warning devices which are actuated to warn the operator of improper coupling conditions.
Inventors
- 👤 Julian Taylor Harris
- 👤 Thomas Adkins Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:51
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
39 words
In a trailer latching means, a first switch actuated by the trailer connection in series with a second switch actuated by a latching means said first switch and said second switch selectively connected in series with a signal means.
Claim 2
Dependent Claim
39 words
In a trailer latching means, a first switch actuated by the trailer connection in series with a second switch actuated by a latching means said first switch and said second switch selectively connected in series with a signal means.
Claim 3
Dependent Claim
137 words
A safety alarm system for a two vehicle connection connecting two vehicles comprising: A. an electrical energy source; B. a first switch means selectively connected in series with said energy source, said first switch means being positioned in a female part of one of said two vehicles, said first switch means actuable by a male part on the other of said two vehicles; C. a second switch means actuable by securing means for said male part, said second switch means selectively connected in series with said energy source and said first switch means; D. warning means selectively connected in series with said electrical energy source, said first and said second switch means; E. said first switch means and said second switch means being connected in series electrically upon actuation of one but not both said switch means.
Claim 4
Dependent Claim
137 words
A safety alarm system for a two vehicle connection connecting two vehicles comprising: A. an electrical energy source; B. a first switch means selectively connected in series with said energy source, said first switch means being positioned in a female part of one of said two vehicles, said first switch means actuable by a male part on the other of said two vehicles; C. a second switch means actuable by securing means for said male part, said second switch means selectively connected in series with said energy source and said first switch means; D. warning means selectively connected in series with said electrical energy source, said first and said second switch means; E. said first switch means and said second switch means being connected in series electrically upon actuation of one but not both said switch means.
Claim 5
Dependent Claim
18 words
The safety alarm system of claim 2 wherein the first switch is actuated by a king pin connection.
Claim 6
Dependent Claim
24 words
The device as claimed in claim 2, wherein said male part comprises a king pin and said female part comprises a fifth wheel assembly.
Claim 7
Dependent Claim
51 words
The device as claimed in claim 2, wherein said first switch means and said second switch means comprise single pole double throw switches, and said device further comprising between said first switch means and said second switch means two electrical connections selectively connected by said first and said second switch means.
Claim 8
Dependent Claim
51 words
The device as claimed in claim 5, wherein the pole of said first switch means and the pole of said second switch means are positioned so that said first switch means and said second switch means are connected in series electrically upon actuation of one but not both said switch means.
References Cited (Backward Citations)
US2797406A
Cited
US3535679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |