Support leg system and method for supporting a dock leveler
View Patent ↗A dock leveler including a support leg system configured to remain in a support position when the dock leveler descends rapidly and retract when the dock leveler descends slowly. Also, a dock leveler including a multi-tiered lip keeper support system for supporting the ramp at more than one position. In addition, a method of supporting a dock leveler ramp. The method includes attaching a first and second lip engaging apparatus under the ramp.
1. A support system for supporting a dock leveler, comprising:
a support leg carrier pivotally attached to a dock leveler;
a support leg attached to the support leg carrier and configured to move via the support leg carrier between a ramp supporting position and a retracted position;
a cam attached to the support leg and biased to a first position; and
a camming surface located below the ramp and positioned to communicate with the cam to guide the cam along the camming surface as the ramp descends, wherein the cam is configured to move to a second position when the ramp descends at or faster than a predetermined speed,
wherein the support leg retracts when the cam maintains the first position while the cam moves along the camming surface and the support leg maintains the support position when the cam moves to the second position.
2. The support system of claim 1 , further comprising:
a catch plate attached to the support leg; and
a catch bar located below the catch plate and configured to catch the catch plate when the support leg has maintained the support position and has lowered to a predetermined position.
3. The support system of claim 1 , further comprising a support lug located beneath the ramp and positioned to support the support leg when the support leg is in the support position and the ramp has lowered to a predetermined position.
4. The support system of claim 3 , further comprising a lip stop attached to the ramp and configured to rest on the support leg and transfer at least some of the weight associated with the ramp to the support leg when the support leg is supporting the ramp.
5. The support system of claim 4 , wherein the lip stop is a stop limiting the pivotal movement of the lip.
6. The support system of claim 1 , further comprising a connecting bar attached to the support leg connecting the support leg to a second support leg.
7. The support system of claim 1 , further comprising a retracting bar attached to the support leg and configured to retract the support leg when the retracting bar is subjected to a lifting force.
8. The support system of claim 1 further comprising:
a second support leg carrier pivotally attached to the ramp located adjacent from the support leg carrier;
a second support leg attached to the second support leg carrier and configured to move via the second support leg carrier between a ramp supporting position and a retracted position;
a second cam attached to the second support leg and biased to a first position; and
a second camming surface located below the ramp and positioned to communicate with the second cam to guide the second cam along the second camming surface as the ramp descends, wherein the second cam is configured to move to a second position when the ramp descends at or faster than a predetermined speed,
wherein the second support leg retracts when the second cam maintains the first position while the second cam moves along the second camming surface and the second support leg maintains the support position when the second cam moves to the second position.