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US 2006/0207040 A1Published application
Support leg system and method for supporting a dock leveler
Assignee4 Front Engineered Solutions, Inc.
InventorsRichard Hoofard, James Alexander, Douglas Massey, Michael Meichtry
Life of this patent
Estimating the term…
Abstract
A method and apparatus for supporting a dock leveler in a manner to reduce the effects of free fall and stump-out. The apparatus includes the use of a retractable support leg. The method includes maintaining the support leg in a support position and retracting the support leg under certain conditions.
Claims29
1-7. (canceled)
A support system for a dock leveler having a ramp, comprising:
- a support leg attached to the ramp;
- a camming surface;
- and,
- a first cam aligned to engage said camming surface and movably attached to said support leg such that said first cam is configured to move substantially linearly from a first position to a second position when the ramp descends at least as fast as a predetermined rate and said first cam engages said camming surface, wherein said first cam is biased to said first position and is configured to maintain said first position when the ramp descends slower than the predetermined rate.
1 more element
17-23. (canceled)
A support system for a dock leveler having a ramp, comprising:
- means for supporting the ramp attached to the ramp;
- means for camming;
- and,
- engaging means aligned to engage said camming means and movably attached to said supporting means such that said engaging means is configured to move substantially linearly from a first position to a second position when the ramp descends at least as fast as a predetermined rate and said engaging means engages said camming means, wherein said engaging means is biased to said first position and is configured to maintain said first position when the ramp descends slower than the predetermined rate.
1 more element
A method of operating a dock leveler ramp comprising the steps of:
- providing a dock leveler with a support leg biased to a supporting position;
- configuring the support leg to retract when the dock leveler ramp descends slower than a predetermined speed by moving a cam along a camming surface;
- and
- configuring the cam to not move substantially further along the camming surface when the dock leveler ramp descends faster than a predetermined speed by moving an axle supporting the cam along a longitudinal axis of the support leg.
1 more element
38-39. (canceled)
Dependencies are inferred from the claim text.