Lifting device assembly

A jack for lifting an object, comprising:

• a base assembly including:
• a frame including:
• two base members disposed parallel to one another in a base plane, each of said two base members having:
• a U-shaped cross-section defining a nesting chamber;
• and
• a series of ratchet openings;
• cross-beams fixedly connecting said two base members to one another;
• a jack platform fixedly connected to two of said cross-beams, said jack platform having an attachment clamp, a first leg, and a second leg longer than said first leg, said second leg disposed at an angle from said base plane;
• four lifting arms, a pair of said four lifting arms pivotably connected to each of said two base members, each of said four lifting arms having a substantially same given arm length;
• two support members for supporting an object to be lifted, said two support members disposed parallel to one another in a support plane parallel to said base plane and parallel to said two base members, said two support members each pivotably connected to a pair of said four lifting arms;
• said two support members and said four lifting arms pivoting with respect to said two base members into positions including:
• a fully raised position wherein said two support members are lifted away from said two base members;
• and
• a fully lowered position wherein one of said two support members and two of said four lifting arms are at least partly nested within a nesting chamber of a respective one of said base members;
• and
• a jacking assembly for moving said two support members and said four lifting arms from said fully lowered position towards said fully raised position, said jacking assembly including:
• a hydraulic jack including:
• a base housing a hydraulic fluid;
• a lifting piston moveably disposed in said base, said lifting piston having a piston end and a cap disposed at said piston end, said attachment clamp of said jack platform removably connecting said base to said second leg of said jack platform such that said lifting piston has an axis inclined with respect to said base plane;
• a pumping piston moveably connected to said base for exerting pressure upon said hydraulic fluid when moved into a downward position and correspondingly raising said lifting piston out of said base along said axis;
• a return spring connected to said pumping piston for returning said pumping piston to a raised position;
• a pedal flange pivotably connected to said base;
• a pedal pivotably connected to said pedal flange, pivotably connected to said pumping piston, and connected to said return spring such that, when said pedal is depressed from an initial position, said pedal depresses said pumping piston, and, when pressure is released from said pedal, said return spring returns said pedal to said initial position;
• and
• a pressure release valve connected to said base for releasing pressure upon said hydraulic fluid;
• a front ram support including:
• an upper span with two ends and a bracket removably connected to said cap of said lifting piston;
• and
• two side spans each having an upper end and a lower end;
• said upper end of each of said two side spans fixedly connected to a respective one of said two ends of said upper span to form a U-shape;
• two of said four lifting arms disposed closer to said jacking assembly than two other arms of said four lifting arms;
• each of said two lifting arms disposed closer to said jacking assembly having a pivot;
• and
• said lower end of each of said two side spans pivotably connected to a respective one of said two lifting arms disposed closer to said jacking assembly at said pivot;
• a locking assembly including:
• two locking pawls each with a ratchet portion and an actuating portion, said ratchet portion having a locking end;
• and
• each of said two locking pawls pivotably connected to a respective one of said two lifting arms disposed closer to said jacking assembly at said pivot;
• a lowering assembly including:
• a lowering pedal having a pressure release flange, said lowering pedal pivotably connected to said base;
• and
• a release bar pivotably connected to each of said two locking pawls at said actuating portion and connected to said lowering pedal such that, when said lowering pedal is initially depressed, said release bar pivots both of said two locking pawls to disconnect said locking end from a respective one of said ratchet openings, and, when said lowering pedal is further depressed, said pressure release flange contacts and moves said pressure release valve to release pressure upon said hydraulic fluid thereby lowering said four lifting arms and said two support members towards said fully lowered position.

A jack for lifting an object, comprising:

• a base assembly having:
• a frame with base members disposed parallel to one another and each having a nesting chamber;
• lifting arms pivotably connected to said base members;
• support members for supporting an object to be lifted, said support members pivotably connected to said lifting arms and disposed parallel to one another and parallel to said base members;
• and
• said support members and said lifting arms pivoting with respect to said base members into positions including:
• a fully raised position wherein said support member is lifted away from said base member;
• and
• a fully lowered position wherein said support members and said lifting arms are at least partly nested within said nesting chamber;
• and
• a jacking assembly for moving said support members and said lifting arms from said fully lowered position towards said fully raised position, said jacking assembly connected to said frame and to at least one of:
• said base members;
• said support members;
• and
• said lifting arms.