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US 8,757,593 B2Granted
Ratchet pawl system, device and method
AssigneeCommonwealth Dynamics, Inc.
InventorMark E. Killion
Life of this patent
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AssigneeCommonwealth Dynamics, Inc.
InventorMark E. Killion
Estimating the term…
A dual ratchet pawl jacking system, device, and method are presented for raising and/or lowering a platform bearing carriage along a vertical support. The ratchet pawls alternate supporting the weight of the carriage by engaging against a series of lugs on the vertical support. A first pawl is attached to the main frame of the carriage, and a second pawl is attached to a sub-carriage assembly that slides upward and downward within the carriage frame. A hydraulic jack applies a force upon the sub-carriage, causing the sub-carriage to move within the frame. The weight of the carriage is alternately borne by each pawl as the other pawl is relocated to a new lug. A pair of triggers is used to retract the first pawl and second pawl from the support. The triggers may be enabled to facilitate lowering the carriage, or disabled to facilitate raising the carriage.
A method for lowering a carriage configured to ascend and descend along a support having a series of lugs disposed upon said support, each lug having a top edge and a bottom edge, the carriage comprising a frame comprising a first ratchet pawl configured to engage said top edges of said series of lugs, a sub-carriage slidably disposed within said frame comprising a second ratchet pawl configured to engage said top edges of said series of lugs, and a plunger configured to apply a downward force upon said sub-carriage, the method comprising the steps of:
A method for lowering a carriage configured to ascend and descend along a support having a series of lugs disposed upon said support, each lug having a top edge and a bottom edge, the carriage comprising a sub-carriage slidably disposed within said carriage, the method comprising the steps of:
A method for raising or lowering a load bearing carriage along a support having a series of lugs disposed upon said support, the carriage comprising a first pawl configured to retractably engage said series of lugs, and a sub-carriage slidably disposed within said carriage comprising a second pawl configured to retractably engage said series of lugs, the method comprising the steps of:
A carriage configured to ascend and descend along a substantially vertical support having a series of lugs disposed upon said vertical support, each lug of said series of lugs having a top edge and a bottom edge, comprising:
Dependencies are inferred from the claim text.