Patent US4556232A successfully refreshed from Google Patents.
US4556232A
Expired / Lapsed
US
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Tractor-trailer coupling device
Assignee: SEVER ENTERPRISES Ltd
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Filing: 1984-04-23
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Granted: 1985-12-03
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Expires: 2004-04-23
Abstract
Abstract A safety device for use with the fifth wheel and kingpin of a tractor-semitrailer combination, in which an auxiliary pin is insertable through an aperture in the fifth wheel upwardly into an arcuate slot located on the underside of the semitrailer and concentric with the kingpin. The auxiliary pin is mounted in a carrier frame fixed to the underside of the fifth wheel. A sleeve is mounted on the carrier frame in axial alignment with the aperture in the fifth wheel, the auxiliary pin being slidable axially in the sleeve and having an arcuate cam groove in its cylindrical surface, an inwardly projecting follower pin of the sleeve engaging the arcuate groove. The auxiliary pin is advanced into, and retracted from, the arcuate slot and at the same time the interaction between the follower pin and the cam groove.
Inventors
- 👤 John I. Sever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:15
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/0871; B62D53/0878; B62D53/0842; B62D53/085
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
238 words
In a safety device for use with a tractor and semitrailer using a fifth wheel having a kingpin for coupling the tractor with the semitrailer, wherein an auxiliary pin is insertable through an aperture in the fifth wheel upwardly into an arcuate slot located on the underside of the semitrailer and concentric with the kingpin, the improvement comprising: a carrier frame fixed to the fifth wheel on the underside thereof; a sleeve mounted on the carrier frame in axial alignment with the aperture in the fifth wheel, the auxiliary pin being slidable axially in the sleeve and having an arcuate cam groove in the cylindrical surface thereof, an inwardly projecting follower pin of the sleeve engaging the arcuate groove; and means mounted on the carrier frame to advance the auxiliary pin into the arcuate slot and to retract the auxiliary pin therefrom, the auxiliary pin being rotated axially in the sleeve during said advancement and retraction thereof by the interaction of the follower pin and the cam groove; the auxiliary pin having a circumferential groove adjacent the lower end thereof, the advancement and retraction means comprising a bell crank arm pivotably mounted on the carrier frame, one end of the crank arm having a yoke engagable with the groove of the auxiliary pin, and a fluid actuated cylinder and piston assembly mounted on the carrier frame with the piston connected to the other end of the crank arm.
Claim 2
Dependent Claim
238 words
In a safety device for use with a tractor and semitrailer using a fifth wheel having a kingpin for coupling the tractor with the semitrailer, wherein an auxiliary pin is insertable through an aperture in the fifth wheel upwardly into an arcuate slot located on the underside of the semitrailer and concentric with the kingpin, the improvement comprising: a carrier frame fixed to the fifth wheel on the underside thereof; a sleeve mounted on the carrier frame in axial alignment with the aperture in the fifth wheel, the auxiliary pin being slidable axially in the sleeve and having an arcuate cam groove in the cylindrical surface thereof, an inwardly projecting follower pin of the sleeve engaging the arcuate groove; and means mounted on the carrier frame to advance the auxiliary pin into the arcuate slot and to retract the auxiliary pin therefrom, the auxiliary pin being rotated axially in the sleeve during said advancement and retraction thereof by the interaction of the follower pin and the cam groove; the auxiliary pin having a circumferential groove adjacent the lower end thereof, the advancement and retraction means comprising a bell crank arm pivotably mounted on the carrier frame, one end of the crank arm having a yoke engagable with the groove of the auxiliary pin, and a fluid actuated cylinder and piston assembly mounted on the carrier frame with the piston connected to the other end of the crank arm.
Claim 3
Dependent Claim
36 words
A safety device as claimed in claim 1 in which the crank arm is pivotally mounted on a bracket fixed to the carrier frame, the cylinder of the fluid actuated assembly being fixed to the bracket.
Claim 4
Dependent Claim
26 words
A safety device as claimed in claim 1 or 2 in which the carrier frame is a plate fixed to the underside of the fifth wheel.
Claim 5
Dependent Claim
231 words
In a safety device for use with a tractor and semitrailer using a fifth wheel having a kingpin for coupling the tractor with the semitrailer, wherein an auxiliary pin is insertable through an aperture in the fifth wheel upwardly into an arcuate slot located on the underside of the semitrailer and concentric with the kingpin, the improvement comprising: a carrier frame fixed to the fifth wheel on the underside thereof; a sleeve mounted on the carrier frame in axial alignment with the aperture in the fifth wheel, the auxiliary pin being slidable axially in the sleeve and having an arcuate cam groove in the cylindrical surface thereof, an inwardly projecting follower pin of the sleeve engaging the arcuate groove; means mounted on the carrier frame to advance the auxiliary pin into the arcuate slot and to retract the auxiliary pin therefrom, the auxiliary pin being rotated axially in the sleeve during said advancement and retraction thereof by the interaction of the follower pin and the cam groove; and a bumper located at each end of the arcuate slot on the semitrailer, the bumper comprising a housing having a well therein, a rigid pin slidable in the well, a resilient plug located in the well behind the pin whereby the pin projects from the housing into the end portion of the arcuate slot, and means to retain the pin in the well.
Claim 6
Dependent Claim
231 words
In a safety device for use with a tractor and semitrailer using a fifth wheel having a kingpin for coupling the tractor with the semitrailer, wherein an auxiliary pin is insertable through an aperture in the fifth wheel upwardly into an arcuate slot located on the underside of the semitrailer and concentric with the kingpin, the improvement comprising: a carrier frame fixed to the fifth wheel on the underside thereof; a sleeve mounted on the carrier frame in axial alignment with the aperture in the fifth wheel, the auxiliary pin being slidable axially in the sleeve and having an arcuate cam groove in the cylindrical surface thereof, an inwardly projecting follower pin of the sleeve engaging the arcuate groove; means mounted on the carrier frame to advance the auxiliary pin into the arcuate slot and to retract the auxiliary pin therefrom, the auxiliary pin being rotated axially in the sleeve during said advancement and retraction thereof by the interaction of the follower pin and the cam groove; and a bumper located at each end of the arcuate slot on the semitrailer, the bumper comprising a housing having a well therein, a rigid pin slidable in the well, a resilient plug located in the well behind the pin whereby the pin projects from the housing into the end portion of the arcuate slot, and means to retain the pin in the well.
Claim 7
Dependent Claim
36 words
A safety device as claimed in claim 4 in which the crank arm is pivotally mounted on a bracket fixed to the carrier frame, the cylinder of the fluid actuated assembly being fixed to the bracket.
Claim 8
Dependent Claim
24 words
A safety device as claimed in claim 4 in which the carrier frame is a plate fixed to the underside of the fifth wheel.
References Cited (Backward Citations)
US3556559A
Cited
US4120514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |