Highway truck-tractor

• US 4,932,716 A
• Filed: 09/15/1988
• Issued: 06/12/1990
• Est. Priority Date: 09/15/1988
• Status: Expired due to Term

• Current Assignee: PACCAR Incorporated
• Original Assignee: PACCAR Incorporated
• Inventors: Marlowe, Huston, Lindsley, John
• Primary Examiner(s): Song, Robert R.
• Application Number:
  US07/244,950
• Time in Patent Office: 635 Days
• Field of Search: 296/180.2, 296/190, 180/69.21, 180/89.1, 180/89.11, 180/89.19
• US Class Current: 296/180.2
• CPC Class Codes: B62D 33/06 Drivers' cabs overhead guards, e.g. against loads falling down B60R21/11; roll-over protection B60R21/13
• CPC Class Codes: B62D 35/001 For commercial vehicles or tractor-trailer combinations, e.g. caravans

Abstract

A truck including a cab having a front windshield, opposite driver and passenger doors, a cab roof, and a roof fairing disengageably mounted to the cab roof is disclosed herein. The windshield, cab roof and roof fairing are configured so that they present a substantially smooth outer front and side joints between their adjacent outer surfaces, whereby to enhance the aerodynamic qualities of the cab. In the actual embodiment disclosed, the truck is of the conventional class 7 or 8 type as opposed to the cab-over-engine type of truck and is designed so that its opposite driver and passenger doors are located behind the driver and passenger seats rather than directly beside them. At the same time, both the truck'"'"'s hood and its windshield wrap around the cab to points adjacent these mid-position doors. The hood is pivotally mounted to the cab and opens up and rearward.

Claims

1. In a truck including an engine and engine-related components, a hood mounted over the engine and engine-related component, and a cab located behind said engine, engine-related components and said hood, the improvement comprising:

(a) a front windshield extending upward and rearward from said hood at an acute angle with the latter;

(b) a cab roof located above said windshield and including a forward section thereof extending upward and rearward from the top of said windshield so as to define a windshield-roof joint therebetween, said windshield and said roof section together presenting a combined windshield-roof surface which extends upward and rearward across said windshield-roof joint in a substantially smooth manner along the entire length of said joint; and

(c) a roof fairing disengageably mounted on said cab roof and including a forward section thereof extending upward and rearward from the top of said forward roof section so as to define a forward roof-fairing joint therebetween, said forward roof section and forward fairing section together presenting a combined forward roof-fairing surface which extends upward and rearward across said forward roof-fairing joint in a substantially smooth manner along the entire length of said last-mentioned joint;

(d) said cab roof including opposite upwardly extending side sections located rearwardly of its forward section and rearwardly of said windshield, said roof fairing including opposite side sections, each of which extends upward from a corresponding one of said roof side sections so as to define a side roof fairing joint therebetween, each of said side roof sections and corresponding side fairing sections together presenting a combined side roof-fairing surface which extends upward across its side roof-fairing joint in a substantially smooth manner along the entire length of said last-mentioned joint, and

(e) said combined windshield-roof surface and said combined forward roof-fairing surface together including an outwardly projecting ridge located centrally between and parallel with opposite sides of the overall truck and extending from said hood across the windshield, the roof, and the fairing to a point near the back end of the fairing, whereby to serve as a guide for the rearward flow of air across the top of the truck as the truck moves forward.

2. The improvement according to claim 1 wherein ridge extends upward and rearward from said hood across said windshield-roof joint and to said forward roof-fairing joint in a substantially linear manner and then gently curves rearward therefrom to said point near the back end of the fairing.

3. The improvement according to claim 2 wherein said combined windshield-roof surface and said combined forward roof-fairing surface together provide aerodynamically smooth paths on opposite sides of and generally parallel with said ridge for the rearward flow of air across the top of the truck as the truck moves forward.

4. The improvement according to claim 1 wherein said front windshield meets said hood at a hood-windshield joint and wherein said hood-windshield joint, said windshield-roof joint, and said forward roof-fairing joint diverge rearwardly and outwardly on opposite sides of said ridge in symmetrical relationship to one another and, if extended, would meet at rearwardmost opposite edges of the truck cab.

28. The improvement according to claim 4 wherein each of said rearwardmost opposite edges of said truck cab extend vertically in a substantially continuous manner.

5. In a truck including a truck cab, the improvement comprising:

(a) a front windshield;

(b) a cab roof located above said windshield and including a forward section thereof extending upward and rearward from the top of said windshield so as to define a windshield-roof joint therebetween, said windshield and said roof section together presenting a combined windshield-roof surface which extends upward and rearward across said windshield-roof joint in a substantially smooth manner along the entire length of said joint; and

(c) a roof fairing disengageably mounted on said cab roof and including a forward section thereof extending upward and rearward from the top of said forward roof section so as to define a forward roof-fairing joint therebetween, said forward roof section and forward fairing section together presenting a combined forward roof-fairing surface which extends upward and rearward across said forward roof-fairing joint in a substantially smooth manner along the entire length of said last-mentioned joint the length of said roof fairing from its front end to its back end being approximately equal to the maximum height of said cab from its floor to the top of its roof and said truck including means for supporting said fairing in an upstanding position to and immediately behind said cab in the event the truck must be decked in order to be towed.

6. The improvement according to claim 5 when said cab roof includes opposite upwardly extending side sections located rearwardly of its forward section and rearwardly of said windshield, and wherein said roof fairing includes opposite side sections, each of which extends upward from a corresponding one of said roof side sections so as to define a side roof-fairing joint therebetween, each of said side roof section and corresponding side fairing section together presenting a combined side roof-fairing surface which extends upward across its side roof-fairing joint in a substantially smooth manner along the entire length of said last-mentioned joint.

27. The improvement according to claim 5 when said cab roof includes opposite upwardly extending side sections located rearwardly of its forward section and rearwardly of said windshield, and wherein said roof fairing includes opposite side sections, each of which extends upward from a corresponding one of said roof side sections so as to define a side roof-fairing joint therebetween, each of said side roof section and corresponding side fairing section together presenting a combined roof-fairing surface which extends upward across its side roof-fairing joint in a substantially smooth manner along the entire length of said last-mentioned joint.

7. In a truck including an engine and engine-related components, a hood mounted over the engine and engine-related components and said hood, the improvement comprising:

(a) a front windshield extending upward and rearward from said hood at an acute angle with the latter;

(b) a cab roof located above said windshield and including a forward section thereof extending upward and rearward from the top of said windshield so as to define a windshield-roof joint therebetween, said windshield and said roof section together presenting a combined windshield-roof surface which extends upward and rearward across said windshield-roof joint in a substantially smooth manner along the entire length of said joint;

(c) a roof fairing disengageably mounted on said cab roof and including a forward section thereof extending upward and rearward from the top of said forward roof section so as to define a forward roof-fairing joint therebetween, said forward roof section and forward fairing section together presenting a combined surface which extends upward and rearward across said forward roof-fairing joint in a substantially smooth manner along the entire length of said last-mentioned joint, the length of said roof fairing from its front end into its back end being approximately equal to the maximum height of said cab from its floor to the top of its roof; and

(d) means for supporting said fairing in an upstanding position to and immediately behind said cab in the event the truck must be decked in order to be towed.

8. In a truck including an engine and engine-related components, a hood mounted over the engine and engine-related component, and a cab located behind said engine, engine-related components and said hood, the improvement comprising:

(a) a front windshield extending upward and rearward from said hood at an acute angle with the latter;

(b) a cab roof located above said windshield and including a forward section thereof extending upward and rearward from the top of said windshield so as to define a windshield-roof joint therebetween, said windshield and said roof section together presenting a combined windshield-roof surface which extends upward and rearward across said windshield-roof joint in a substantially smooth manner along the entire length of said joint; and

(c) a roof fairing disengageably mounted on said cab roof and including a forward section thereof extending upward and rearward from the top of said forward roof section so as to define a forward roof-fairing joint therebetween, said forward roof section and forward fairing section together presenting a combined forward roof-fairing surface which extends upward and rearward across said forward roof-fairing joint in a substantially smooth manner along the entire length of said last-mentioned joint;

(d) said cab including driver and passenger seats within the cab and opposite driver and passenger doors located rearward of said seats, whereby across into said cab through said doors is behind said seats, and

(e) said hood including opposite side sections extending from in front of said cab rearwardly along opposite sides of the cab so as to provide opposite rearwardmost back edges in close proximity to and in front of the front edge of said cab doors, when the hood is closed, whereby to help insulate the lower front sides of the cab where the driver and passenger sit.

9. The improvement according to claim 8 wherein said cab includes an interior sleeping area located rearwardly of said seats and said doors, whereby access into said cab through said doors is in front of said sleeping area.

10. The improvement according to claim 8 wherein the distance from the floor within said cab to its ceiling including the area between the driver and passenger seat is at least 6 feet, whereby to provide standing room adjacent to drivers seating and in balance of cab.

11. The improvement according to claim 8 wherein said truck includes means for supporting said hood to said cab for pivotal movement between a closed position and an opened position at pivot points located near the uppermost ends of the rearwardmost back edges of said hood, whereby the forwardmost point on said hood moves substantially vertically upward and then rearward as the hood moves from its closed position to its open position so that it is not necessary to provide much space in front of the truck in order to open the hood, and such that superior service access is provided to the front of the chassis, as well as the engine compartment and firewall.

12. The improvement according to claim 8 wherein said truck includes rearview mirrors mounted directly on said opposite side sections of said hood.

13. The improvement according to claim 8 wherein said truck includes a bumper side sections connected to said hood for movement between its opened and closed positions.

14. The improvement according to claim 8 wherein said front windshield includes opposite side sections extending rearwardly along opposite sides of said cab so as to provide opposite rearwardmost back edges in close proximity to and in front of the front sides of said cab doors, whereby to eliminate the need for a door post or A-type pillar, within the driver'"'"'s field of view.

15. The improvement according to claim 14 wherein said cab roof and said roof fairing include opposite side sections and wherein the opposite side sections of said roof, said fairing, said hood, and said windshield diverge rearwardly in generally symmetrical relationship to one another and, if extended would meet at rearwardmost opposite edges of the truck cab.

16. The improvement according to claim 14 wherein said truck includes a frontmost grille and wherein said diverging side sections of said hood extend from opposite sides of grille to their rearwardmost back edges.

17. In a truck of the Class 8 or 9 type including an engine and engine-related components, a cab located behind the engine, and driver and passenger seats within the cab, the improvement comprising:

(a) opposite driver and passenger doors forming part of said cab and located rearward of said driver and passenger seats, whereby access into said cab through said doors is behind said seats; and

(b) a hood mounted over said engine and engine-related components in front of said cab, said hood including opposite side sections extending from in front of said cab rearwardly along opposite sides of the cab so as to provide opposite rearwardmost back edges in close proximity to and in front of the front sides of said cab doors when the hood is closed, whereby to help insulate the lower front sides of the cab where the driver and passenger sit.

18. An improvement according to claim 17 wherein said truck includes means for supporting said hood to said cab for pivotal movement between and closed position and an opened position at pivot points located near the uppermost ends of the rearwardmost back edges of said hood, whereby the forwardmost point on said hood moves substantially vertically upward and then rearward as the hood moves from its closed position to its open position so that it is not necessary to provide much space in front of the truck in order to open the hood, and such that superior service access is provided to the front of the chassis as well as the engine compartment and firewall.

19. The improvement according to claim 17 wherein said truck includes rearview mirrors, mounted directly on said opposite side sections of said hood.

20. The improvement according to claim 17 wherein said truck includes a bumper assembly connected to said hood for movement between its opened and closed positions.

21. The improvement according to claim 17 wherein said truck includes a front windshield having opposite side sections extending rearwardly along opposite sides of said cab so as to provide opposite rearwardmost back edges in close proximity to and in front of the sides of said cab doors, whereby to eliminate the need for a door post or A-type pillar.

22. In a truck including an engine and engine-related components, a hood mounted over the engine and engine-related component, and a cab located behind said engine, engine-related components and said hood, the improvement comprising:

(a) a front windshield extending upward and rearward from said hood at an acute angle with the latter;

(b) a cab roof located above said windshield and including a forward section thereof extending upward and rearward from the top of said windshield so as to define a windshield-roof joint therebetween, said windshield and said roof section together presenting a combined windshield-roof surface which extends upward and rearward across said windshield-roof joint in a substantially smooth manner along the entire length of said joint; and

(c) a roof fairing disengageably mounted on said cab roof and including a forward section thereof extending upward and rearward from the top of said forward roof section so as to define a forward roof-fairing joint therebetween said forward roof section and forward fairing section together presenting a combined forward roof-fairing surface which extends upward and rearward across said forward roof-fairing joint in a substantially smooth manner along the entire length of said last-mentioned joint; and

(d) said combined windshield-roof surface and said combined forward roof-fairing surface together including a forward and upward projecting ridge located centrally between and parallel with opposite sides of the overall truck and extending from said hood across the windshield, the roof, and the fairing to a point near the back end of the fairing, whereby to serve as a guide for the rearward flow of air across the top of the truck as the truck moves forward.

23. The improvement according to claim 22 wherein ridge extends upward and rearward from said hood across said windshield-roof joint and to said forward roof-fairing joint in a substantially linear manner and then gently curves rearward therefrom to said point near the back end of the fairing.

24. The improvement according to claim 23 wherein said combined windshield-roof surface and said combined forward roof-fairing surface together provide aerodynamically smooth paths on opposite sides of and generally parallel with said ridge for the rearward flow of air across the top of the truck as the truck moves forward.

25. In a truck including an engine and engine-related components, a hood mounted over the engine and engine-related component, and a cab located behind said engine, engine-related components and said hood, the improvement comprising:

(a) a front windshield extending upward and rearward from said hood at an acute angle with the latter;

(b) a cab roof located above said windshield and including a forward section thereof extending upward and rearward from the top of said windshield so as to define a windshield-roof joint therebetween, said windshield and said roof section together presenting a combined windshield-roof surface which extends upward and rearward across said windshield-roof in a substantially smooth manner along the entire length of said joint; and

(c) a roof fairing disengageably mounted on said cab roof and including a forward section thereof extending upward and rearward from the top of said forward roof section so as to define a forward roof-fairing joint therebetween, said forward roof section and forward fairing section together presenting a combined forward roof-fairing surface which extends upward and rearward across said forward roof-fairing joint in a substantially smooth manner along the entire length of said last-mentioned joint;

(d) said cab roof, said roof fairing, hood and windshield including opposite side sections which diverge rearwardly in generally symmetrical relationship to one another and, if executed, would meet at rearwardmost opposite edges of the truck cab.

26. The improvement according to claim 25 wherein said truck includes a frontmost grille and wherein said diverging side sections of said hood extend from opposite sides of grille to their rearwardmost back edges.

29. In a truck including a truck cab, the improvement comprising:

(a) a front windshield;

(b) a cab roof located above said windshield and including a forward section thereof extending upward and rearward from the top of said windshield; and

(c) means serving solely as a roof fairing disengageably mounted on said cab roof and including a forward section thereof extending upward and rearward from the top of said forward roof section so as to define a forward roof section and forward fairing section together presenting a combined forward roof-fairing surface which extends upward and rearward across said forward roof-fairing joint in a substantially smooth manner along the entire length of said last-mentioned joint;

(d) the length of said roof fairing from its front end to its back end is approximately equal to the maximum height of said cab from its bottom edge to the top of its roof and wherein said truck includes means for supporting said fairing in an upstanding position to and immediately behind said cab in the event the truck must be decked in order to be towed.