# Patent

## Title
Apparatus for vehicle hood

## Abstract

A latching device and operating mechanism are provided suitable for controlling the opening or closing of a tilting cover such as the hood of a car or truck. The latching device operates to prevent accidental closure of the cover when the cover is open. The operating mechanism is coupled to the latching device for releasing the latching device when the hood is to be shut. The operating mechanism is located on the vehicle near a location from which an operator typically opens or closes the hood.

## Background
The present invention generally relates to an apparatus for controlling the opening or closing of a cover or hatch on a motor vehicle, and more particularly to an apparatus for conveniently controlling the opening or closing of a forward tilting hood of a medium- or heavy-duty truck or highway tractor.
BACKGROUND OF THE INVENTION
Forward tilting truck hoods are typically attached to the body or frame of a truck by means of one or more hinges, pins, or other types of revolute joint. Latches, hooks, rubber straps, and the like are used to keep the hood shut during normal operation. Prior to opening the hood, the latches or other fastener must be unfastened. Because these fasteners typically are located on either side of the hood opposite the hinge, the operator must move to various locations to operate the fasteners. For example, an operator may have to unfasten an elastic hold down on each side of the truck cab near a rear portion of the hood. Other fasteners may be operated remotely from in the cab by a cable, solenoid, or other mechanism.
After operating the latches or fasteners that hold the hood shut, the operator then typically moves to the front of the truck. From this position the top front portion of the hood may be pulled so that the hood rotates forward about the hinge pivot axis, giving the operator access to the engine and other vehicle components located under the hood.
The weight of the hood of a typical large truck may easily exceed 100 pounds. A hood may also have sharp angular edges, protruding bolts, and the like. Thus, an unrestrained truck hood presents a risk of injury should it fall open or shut in an uncontrolled manner. For example, an open hood may be blown shut unexpectedly by a sufficiently strong wind. To prevent such occurrences, a locking mechanism is typically provided to prevent inadvertent closure of a forward tilting truck hood.
When closing the hood an operator first must release the locking mechanism that prevents inadvertent hood closure. Typically, this requires the operator to move to a position beside the hood so that he may reach the locking mechanism. Often the locking mechanism is located under the hood in the vicinity of the hinge. Thus, while releasing the locking mechanism the operator may be in a position in which he is vulnerable if the hood were to shut accidentally.
After releasing the locking mechanism, the operator moves to the front of the truck and lifts the hood so that it rotates up and back about the hinge pivot axis. When the hood is fully shut, the operator then moves to various other locations around the truck to operate one or more latches or other devices that keep the hood securely shut.
Thus, an operator desiring to open or shut a typical forward tilting hood of a large truck has to move to several locations around the truck to operate various securing mechanisms, to release locking mechanisms, and to open or shut the hood. It would therefore be desirable to provide a mechanism that enables the operator to conveniently operate securing and locking mechanisms and reposition the hood from a single convenient position near the front of the truck.
SUMMARY OF THE INVENTION
The above, and other objects and advantages of the present invention are provided by an operating mechanism located near a top front portion of a truck hood. The operating mechanism may be coupled to a release mechanism so that actuation of the operating mechanism releases the hood so that it may be opened. The release mechanism may also be coupled to a locking mechanism that prevents the hood from closing inadvertently. Thus, an operator is able to operate the latching and locking mechanisms, and open or shut the hood, from a single location near the front of the truck.



BRIEF DESCRIPTION OF THE DRAWINGS
The above and other objects and advantages of the present invention will be understood upon consideration of the following detailed description taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout, and in which:
FIG. 1 is an oblique exploded view of an illustrative embodiment of an operating mechanism in accordance with the principles of the present invention;
FIGS. 2A and 2B are two sectional views showing the operating mechanism of FIG. 1 in normal and actuated positions, respectively;
FIG. 3 is an oblique view of a locking device for preventing unintended closure of a forward tilting truck hood, in accordance with the principles of the present invention;
FIGS. 4 through 6 are sectional views of locking device of FIG. 3, shown at various stages of opening a truck hood;
FIG. 7 is shows an alternative method of unlocking the locking device of FIG. 3.



DETAILED DESCRIPTION
Referring first to FIG. 1, operating mechanism 10 includes movable handle 12, disposed near hand recess 14 in hood 16. Preferably, hand recess 14 is located along a top front edge of hood 16 and has a suitable size and shape to permit entry of an operator's hand. Movable handle 12 includes pivots 18 extending from opposite ends thereof, which are configured to fit corresponding recesses 20 in hood 16.
As shown in FIGS. 2A and 2B, link 26 is operatively coupled to movable handle 12 by means of pin 28. In the illustrative embodiment of the present invention, a cable or other type of operative interconnect may also be used. Shrouds or guards 30 extending from movable handle 12 on both sides of link 26 may be provided to prevent an operator's hand or fingers from being pinched during operation of operating mechanism 10.
As shown in FIG. 1, movable handle 12 including pivots 18, pin 28, and shroud 30, comprises a unitary structure preferably formed from injection molded plastic. Alternatively, movable handle 12 may comprise an assemblage of multiple parts.
Fixed handle 22 is disposed adjacent to movable handle 12 and is fastened to hood 16 using bolts 24, or other suitable means, so that pivots 18 are retained in recesses 20. An ornamental fascia such as grille work 32 of FIGS. 2A and 2B (not shown in FIG. 1) may be mounted to hood 16 so as to hide operating mechanism 10 from view.
When operating mechanism is not being used, the weight of link 26, the elastic resilience of pivots 18, a spring (not shown), or some other biasing means causes movable handle 12 to assume the position shown in FIG. 2A. To use operating mechanism 10, an operator grasps movable handle 12 and fixed handle 22, for example, by inserting their fingers into hand recess 14. Squeezing movable handle 12 toward fixed handle 22 causes movable handle 12 to rotate or pivot about pivots 18. As shown in FIG. 2B, this causes link 26 to be pulled upward by pin 28. Movement of link 26 may in turn operate a remote mechanism or device. For example, link 26 may be coupled to latching device 36 of FIG. 3. When an operator releases his movable handle 12, movable handle 12 returns to the position shown in FIG. 2A due to the biasing means described above.
The operating mechanism thus described in connection with FIGS. 1, 2A, and 2B provides a convenient device for operating remote mechanisms such as hood release mechanisms and the like. Although operating mechanism 10 is shown with a single mechanical linkage, other arrangements may be used. For example, multiple movable handles and linkages may be provided so that several remote mechanisms may be operated. In addition, movable handle 12 may operate a switch that in turn activates a relay, solenoid, or the like.
Turning now to FIG. 3 an oblique view is shown of latching device 36 which prevents inadvertent closure of a truck hood. Latching device 36 includes latch bar 38 pivotally coupled to vehicle frame cross member 40 and release lever 42 pivotally mounted to hood cross member 44. For example, latch bar 38 may be attached by pin 45 to bracket 43 which may be bolted or welded to vehicle frame cross member 40. Similarly, release lever 42 may be connected by pin 48 to bracket 46, which in turn is connected to hood cross member 44. Torsion spring 47 or other means biases latch bar 38 toward release lever 42 so that latch bar 38 fits into slot 50 therein. Pin 52 keeps latch bar 38 engaged within slot 50. Preferably, slot 50 includes portion 54 that is wide enough to permit pin 52 to pass through when latching device 36 is being assembled or disassembled. Strut 56 may be used to hold latch bar 38 in a released position to facilitate assembly of the hood to the vehicle.
Operation of latching device 36 is now described in connection with FIGS. 4 through 6. FIG. 4 shows latching device 36 when the hood is in a fully shut position. In the shut position, latch bar 38 is biased against hood cross member 44. When the hood is pivoted open about pivot 58 of hinge 60 (shown in phantom) latch bar 38 slides in slot 50. As shown in FIG. 5, torsion spring 47 keeps latch bar 38 biased against hood cross member 44. As shown in FIG. 4, latch bar 38 includes notch 62 and projecting portion 64 in the free end thereof. When the hood is nearly fully open, hood cross member 44 slides under latch bar 38 into notch 62 as shown in FIG. 6. Projecting portion 64 of latch bar 38 comes to rest on an upper portion of hood cross member 44.
With hood cross member 44 positioned in notch 62, accidental closure of the hood is substantially prevented. If the hood is moved toward a closed position, either manually or due to a gust of wind or the like, a corner of hood cross member 44 contacts latch bar 38 at notch 62. Contact with latch bar 38 hinders further closing of the hood. Preferably, the relative positions of latch bar 38 and hood cross member 44, and the shape of notch 62 are designed so that any force of hood cross member 44 applied to notch 62 in latch bar 38 results in a small tangential force tending to further seat latch bar 38 against hood cross member 44. Hood cross member 44 may include suitable reinforcement to withstand forces and wear caused by contact with notch 62 in latch bar 38.
The release of latching device 36 is shown in FIG. 7. Link 26 is pivotally connected to release lever 42 by pin 70, or other suitable means. When operated by a suitable mechanism, e.g., operating mechanism 10 of FIG. 1, link 26 causes release lever 42 to pivot on pin 48 to the position shown. An end of slot 50 contacts and lifts latch bar 38 so that notch 62 is clear of hood cross member 44. With latch bar 38 in this raised position, the hood can then be closed.
Strut 56 provides an alternative means of releasing latch bar 38 if, for some reason, it is not possible to operate link 26. For example, a vehicle may be parked such that access to operating mechanism 10 on the open hood is obstructed by another truck or other object. To release latching device 36, latch bar 38 is lifted so that hood cross member 44 is clear of notch 62. Strut 56 is then rotated upward and positioned so that an end of strut 56 fits into notch 66 in the lower edge of latch bar 38 as shown in phantom lines in FIG. 7. Strut 56 prevents torsion spring 47 from forcing latch bar 38 back down against hood cross member 44, and thereby permits the hood to be moved to the shut position. When the hood is being shut, an upper portion of hood cross member 44 comes into contact with the lower edge of latch bar 38, lifting it upward. The upward motion of latch bar 38 releases strut 56 from notch 66, and strut 56 returns to its reset position as shown in FIG. 4. Additional notches may be provided in the lower edge of latch bar 38 to hold latch bar 38 in other positions. For example, notch 68 may be provided that holds latch bar 38 in a near vertical orientation so that it is out of the way while the hood is being mounted to the vehicle.
Thus, a latching device and remote operating mechanism particularly suited for use in opening or closing a forward tilting hood of a motor vehicle has been disclosed. It will be readily apparent that the mechanisms thus disclosed may be useful for other applications and that various modifications may be made to the disclosed embodiment without departing from the spirit and scope of the invention. Accordingly, one will understand that the description provided herein is provided for purposes of illustration and not of limitation, and that the invention is limited only by the appended claims.

## Claims

1. Apparatus for preventing accidental closure of a forward tilting hood of a motor vehicle, the apparatus comprising:
a release lever pivotally coupled to the hood, the release lever having a portion defining a slot;
a latch bar having a first end pivotally coupled to a frame of the vehicle and a second end adapted to engage a portion of the hood, the latch bar passing through the slot in the release lever;
wherein the latch bar is configured so that when the hood is open the second end engages the portion of the hood so as to prevent closing the hood, and
wherein the release lever is configured so that when it is pivoted, the latch bar is repositioned so that the second end no longer engages the hood.

2. The apparatus of claim 1, further comprising an operating mechanism for pivoting the release lever.

3. The apparatus of claim 2 wherein the operating mechanism comprises an operating linkage interconnecting the release lever and a handle located at a position removed from the release handle.

4. The apparatus of claim 3, wherein the release lever and the latch bar are disposed near a hinge axis of the hood.

5. The apparatus of claim 3, wherein the handle is disposed at an upper forward portion of the hood.

6. The apparatus of claim 1, wherein the first end of the latch bar is pivotally coupled to a bracket fastened to a vehicle frame cross member.

7. The apparatus of claim 1, wherein the release lever is pivotally coupled to a bracket attached to a hood cross member.

8. The apparatus of claim 7 wherein the hood cross member is reinforced.