Vertically-storing dock leveler apparatus and method

• US 7,162,761 B2
• Filed: 05/27/2004
• Issued: 01/16/2007
• Est. Priority Date: 05/27/2003
• Status: Active Grant

• Current Assignee: 4Front Engineered Solutions Incorporated (Assa Abloy AB)
• Original Assignee: 4Front Engineered Solutions Incorporated (Assa Abloy AB)
• Inventors: Alexander, James C., Hoofard, Richard
• Primary Examiner(s): Hartmann; Gary S.
• Application Number:
  US10/854,294
• Publication Number:
  US 20050015900A1
• Time in Patent Office: 964 Days
• Field of Search: 14/695, 14/711, 14/713
• US Class Current: 14/71.3
• CPC Class Codes: B65G 69/2835 with spring-operated means
• CPC Class Codes: B65G 69/2841 extensible by pivoting parts

Abstract

A dock leveler for bridging the gap between a loading dock and the bed of a vehicle parked at the loading dock. The dock leveler is configured for installation on the top of the dock and is designed to rotate from a vertically-stored raised position to at least one lowered, operative position. In some embodiments, the dock leveler can be lowered either for normal operation so that the deck assembly rests on the bed of the vehicle or it can be lowered to accommodate an end-loading condition.

Claims

1. A vertically storing dock leveler comprising:

a support structure mountable to a loading dock;

a deck assembly pivotally mounted to the support structure and configured to move between a substantially vertical position and a working position;

a counterbalance assembly comprising a spring connected to the support structure and the deck assembly, the spring having a moveable effective anchor point at one end wherein a line of action of the spring moves as the effective anchor point moves; and

a hold down mechanism configured to selectively cause the deck assembly to remain downwardly biased when it is raised above a working range or cause the ramp assembly to become upwardly biased to the substantially vertical position;

a lifting mechanism configured to permit an operator to actuate the lifting mechanism and raise the deck assembly from a working range to a stored position, wherein the lifting mechanism comprises;

a lever assembly pivotally mounted to the deck assembly via a pivot pin;

an actuator located on the lever assembly wherein the actuator when actuated by an operator causes the plate to rotate about the pivot pin; and

a lug mounted on the lever assembly and configured to urge against an urging pin mounted on the hold down assembly when the actuator is actuated and as the lug urges against the urging pin, a force will act on the pivot pin to raise the deck assembly.

2. The dock leveler of claim 1, wherein, when the deck assembly is in the working position, the lifting mechanism is configured to pivot to a stored position where the actuator is substantially parallel to the surface of the loading dock.

3. The dock leveler of claim 2, further comprising a foot peg mounted on the lever assembly and configured to permit the lifting mechanism to be raised from the stored position to a working position by an operator applying pressure to the foot peg.

4. The dock leveler of claim 1, wherein at least part of the actuator is removable from the lever assembly.

5. The dock leveler of claim 4, wherein the actuator comprises:

a lever; and

a receiver mounted on the lever assembly wherein the lever removably connects to the receiver and when connected in the receiver, actuation of the lever pivots the lever assembly.

6. The dock leveler of claim 5, further comprising a lip pivotally connected to an end of the deck assembly and a lever receiver associated with the lip and configured to permit the lever to move the lip between extended and pendant positions.

7. The dock leveler of claim 1, further configured to provide a mechanical advantage in raising the deck assembly from the working range by reducing the force required by the operator to lift the deck assembly by locating the pivot pin of the lever assembly a shorter distance away from the urging pin than a distance from the pivot pin of the lever assembly to the pivotal connection between the deck assembly and the support structure.