Patent US4191394A successfully refreshed from Google Patents.
US4191394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer hitch
Assignee: Bendix Corp
•
Filing: 1978-07-03
•
Granted: 1980-03-04
•
Expires: 1998-07-03
Abstract
Abstract A hitch for connecting a tow vehicle to a trailer having a toggle plate through which a steering input is transmitted into a steering system on the trailer and a braking input is transmitted into a braking system on the trailer.
Inventors
- 👤 John T. Kasselmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:28
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/107; B62; B62D; B62D13/00; B62D13/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
333 words
In a tow vehicle-trailer combination having a steering system on the trailer that responds to a steering input signal created in the tow vehicle, a brake system on the trailer that responds to a braking input signal developed in a surge brake actuator, and a hitch for joining the tow vehicle to the trailer, the improvement in which the hitch includes, a connecting member pivotally attached to said tow vehicle, to said surge brake, and to said steering system, said connecting member comprising: a bracket fixed to said tow vehicle having a first and second spaced apart pivotal point of attachment; a clevis attached to an input member of said surge brake actuator; a plate member having a hole therethrough, said hole being aligned with said clevis; a pin extending through said hole for connecting said plate with said clevis, said clevis supporting said plate member in said trailer, said plate having third and fourth spaced apart pivotal points of attachment located on opposite sides of said hole; a first bar attached to said bracket and said plate for connecting said first pivotal point of attachment with said third pivotal point of attachment; and a second bar attached to said bracket and said plate for connecting said second pivotal point of attachment with said fourth pivotal point of attachment, said first and second bars transmitting both the braking input signal and the steering input signal from the tow vehicle to the plate member, said plate member pivoting with respect to said surge brake actuator for transmitting said steering input signal from the tow vehicle to the trailer and moving longitudinally with respect to the tow vehicle for transmitting said braking input into said surge brake actuator to effect a brake application, said first, second, third and fourth spaced apart pivotal points of attachment stabilizing the transmission of said braking input signal to said surge brake actuator to reduce the possibility of introducing a steering input into said steering system during a brake application.
Claim 2
Dependent Claim
333 words
In a tow vehicle-trailer combination having a steering system on the trailer that responds to a steering input signal created in the tow vehicle, a brake system on the trailer that responds to a braking input signal developed in a surge brake actuator, and a hitch for joining the tow vehicle to the trailer, the improvement in which the hitch includes, a connecting member pivotally attached to said tow vehicle, to said surge brake, and to said steering system, said connecting member comprising: a bracket fixed to said tow vehicle having a first and second spaced apart pivotal point of attachment; a clevis attached to an input member of said surge brake actuator; a plate member having a hole therethrough, said hole being aligned with said clevis; a pin extending through said hole for connecting said plate with said clevis, said clevis supporting said plate member in said trailer, said plate having third and fourth spaced apart pivotal points of attachment located on opposite sides of said hole; a first bar attached to said bracket and said plate for connecting said first pivotal point of attachment with said third pivotal point of attachment; and a second bar attached to said bracket and said plate for connecting said second pivotal point of attachment with said fourth pivotal point of attachment, said first and second bars transmitting both the braking input signal and the steering input signal from the tow vehicle to the plate member, said plate member pivoting with respect to said surge brake actuator for transmitting said steering input signal from the tow vehicle to the trailer and moving longitudinally with respect to the tow vehicle for transmitting said braking input into said surge brake actuator to effect a brake application, said first, second, third and fourth spaced apart pivotal points of attachment stabilizing the transmission of said braking input signal to said surge brake actuator to reduce the possibility of introducing a steering input into said steering system during a brake application.
Claim 3
Dependent Claim
95 words
In the tow vehicle-trailer combination, as recited in claim 1 wherein said plate further includes: fifth and sixth spaced apart pivotal points of attachment; a first adjustable connecting rod attached to said fifth pivotal point of attachment and to a first spindle arm of the steering system; and a second adjustable connecting rod attached to said sixth pivotal point of attachment and a second spindle arm of the steering system, said first and second adjustable connecting rods being adjusted to align the steerable wheels in the steering system with the non-steerable wheels in the trailer.
Claim 4
Dependent Claim
46 words
In the tow vehicle-trailer combination as recited in claim 2 wherein said fifth and sixth spaced apart pivotal points of attachment on said plate member are positioned to minimize the effect of the longitudinal movement of the plate member on the first and second spindle arms.
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) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |