Vehicle bumper stored crane hoist

• US 4,746,263 A
• Filed: 11/10/1986
• Issued: 05/24/1988
• Est. Priority Date: 11/10/1986
• Status: Expired due to Fees

• Current Assignee: Gladys Eldridge, Jack Eldridge
• Original Assignee: Jo Ellen Watson
• Inventors: Cook, Larry D.
• Primary Examiner(s): Spar, Robert J.
• Assistant Examiner(s): Nguyen, Vien
• Application Number:
  US06/929,578
• Time in Patent Office: 561 Days
• Field of Search: 414/540, 414/542, 414/543, 414/546, 414/547, 414/550, 414/555, 414/539, 414/541, 212/182, 212/187, 212/189, 293/106, 293/117, 224/42.03 R
• US Class Current: 414/543
• CPC Class Codes: B60P 1/549 and having a first pivot on a horizontal axis
• CPC Class Codes: B66C 23/44 Jib-cranes adapted for attachment to standard vehicles, e.g. agricultural tractors

Abstract

A telescoping hoist assembly normally stored in the rear bumper area of a pickup truck includes a boom telescoping into and out of a mast pivotally anchored at one end of the pickup bumper structure. A power winch operated by the pickup electrical energizer is axially mounted on the outward end of the boom. With boom extended out of the mast the cable is connected with the anchored area of the mast for a hoist self erecting action interrupted, when the mast is vertical, by stop members at the base end of the mast. A mast stored jack structure supports hoist loads independently of the pickup suspension system.

Claims

1. In a mobile vehicle having a load supporting platform, an electrical system a source of electrical energy and having a rear bumper structure, the improvement comprising:

telescoping hoist means including a boom and mast means pivotally connected with one end of the bumper structure for vertical movement as a unit about a horizontal axis from a horizontal bumper stored position to an upright mast with boom extended operating position;

jack means telescopically extended from the pivotally connected end portion of the mast when erected upright for supporting a hoist means carried load from the end of the boom;

power winch means including a motor mounted on the free end portion of said boom and operatively connected with the vehicle source of electrical energy for a hoist means self-erecting action; and

,

cooperating stop means at the pivotally connected end of the mast for interrupting the hoist self-erecting action when the axis of the mast reaches the vertical.

2. The combination according to claim 1 in which the boom and mast means includes:

a mast having a base end and a longitudinal length at least equal to one-half the transverse width of the vehicle but less than the full width of the vehicle; and

,

a boom telescoping out of the mast prior to erecting the hoist and pivotally joined with the mast in a manner to extend laterally and upward at an obtuse angle with respect to the longitudinal axis of the mast when erected.

3. The combination according to claim 2 and further including:

sleeve and thrust bearing means in said mast journalling said boom for angular rotation about its longitudinal axis when telescoped into the mast and angular rotation about the longitudinal axis of the mast when disposed at said obtuse angle.

4. The combination according to claim 3 in which the stop means includes:

mast stop means secured to the mast adjacent its horizontal pivoting axis for engaging the adjacent end portion of the bumper structure when the mast is vertically disposed.

5. The combination according to claim 4 in which the stop means further includes:

lock bar means interposed between the mast and the bumper structure for preventing unauthorized pivoting action of the mast toward the bumper structure.

6. The combination according to claim 5 in which the power winch means includes:

a winch having a drum;

a reversible motor having its drive shaft operatively connected with said winch;

a cable wound on said drum and having a free hook equipped end; and

,

anchor rod means extendible beyond the pivotally connected end portion of said mast for anchoring the cable hook end during the hoist self-erecting action.