Collapsible trailer hoist
OwnerSamuel Grimaldoinventor
Life of this patent
Estimating the term…
Abstract
A collapsible framework or chassis equipped on top with a trackway is mounted on a trailer which may be transported from place to place to assist in servicing vehicles. The framework may be alternately collapsed and maintained in a low profile during travel conditions and expanded to full height while supporting the vehicle on its trackway so that the underside of the vehicle can be serviced, e.g., muffler repair or installation. A control means first raises the front portion of the collapsible framework after the vehicle drives from a ramp onto the trackway and thereafter raises the rearward portion of the collapsible framework to thereby position the vehicle for servicing.
Claims16
A collapsible trailer hoist comprising:
- a. a main support;
- b. a movable support movable between a lower position adjacent the main support and a raised position above the main support;
- c. a collapsible front end frame interconnecting front portions of the main support and movable support and including,
- c.1 a pair of laterally spaced elongated beams pivotally coupled to the movable support and having a set of normally free ends,
- c.2 a pair of laterally spaced short beams coupled to the main support and pivotally coupled to intermediate portions of corresponding elongatged beams, and
- c.3 an upper cross beam interconnecting the elongated beams and a lower cross beam interconnecting the short beams.
- d. a collapsible rear end frame interconnecting rear portions of the main support and movable support;
- and,
- e. control means operable to sequentially expand the front end frame and rear end frame to lift the movable support to its raised position, the control including a mechanical expander connected to and extending between the upper and lower cross beams of the front end frame, wherein when the front end frame is alternately collapsed and expanded, the elongated and short beams are generally parallel and mutually angled respectively.
A collapsible trailer hoist comprising:
- a. a main support including a pair of side rails formed laterally therethrough with locking holes;
- b. a movable support movable between a lower position adjacent the main support and a raised position above the main support;
- c. a collapsible front end frame interconnecting front portions of the main support and movable support and including,
- c.1 a pair of laterally spaced elongated beams pivotally coupled to the movable support and having a set of normally free ends formed with locking holes movable into registering alignment with the side rail locking holes when the movable support is in its raised position;
- c.2 a pair of laterally spaced short beams coupled to the main support and pivotally coupled to intermediate portions of corresponding elongated beams;
- d. a collapsible rear end frame interconnecting rear portions of hte main support and movable support;
- e. removable safety pins provided for insertion through the registering sets of locking holes in order to assist in holding the movable support in its raised position;
- and,
- f. control means operable to sequentially expand the front end frame and rear end frame to lift the movable support to its raised position,
- wherein when the front end frame is alternately collapsed and expanded the elongated and short beams are generally parallel and mutually angled respectively.
Dependencies are inferred from the claim text.