Load support assembly

• US 4,402,645 A
• Filed: 03/30/1981
• Issued: 09/06/1983
• Est. Priority Date: 03/30/1981
• Status: Expired due to Term

• Current Assignee: Deere & Company
• Original Assignee: Deere & Company
• Inventors: Munns, Dennis L., Broderick, Ross T.
• Primary Examiner(s): Spar, Robert J.
• Assistant Examiner(s): Underwood, Donald W.
• Application Number:
  US06/248,156
• Time in Patent Office: 890 Days
• Field of Search: 414/607, 414/640, 414/641, 414/662, 414/663, 414/664, 414/668, 414/672, 414/685, 414/785, 414/917, 414/667
• US Class Current: 414/685
• CPC Class Codes: B66F 9/065 non-masted mobile jacks of the garage type mounted on wheels or rollers B66F5/00
• CPC Class Codes: B66F 9/12 Platforms; Forks; Other load supporting or gripping members
• CPC Class Codes: B66F 9/148 Whole unit including fork support moves sideways
• CPC Class Codes: Y10S 414/13 Handlers utilizing parallel links

Abstract

A load support assembly including a base plate pivotally mounted to the lift arm of a supporting vehicle. A linking arm pivotally mounted to the base plate at one end and having a lift fork pivotally mounted at the other end. A hydraulic cylinder pivotally mounted to the base plate at one end and has a lift fork pivotally mounted at the other end. A linking arm is pivotally mounted to the base plate at one end and has another lift fork pivotally mounted at the other end. A member is pivotally mounted to both lift forks to maintain the lift forks in parallel alignment. A second hydraulic cylinder is pivotally mounted to the base plate at one end and to the linking arm at the other end to impart rotational displacement to the linking arm.

Claims

1. In combination with a vehicle having vertically displaceable lift arms, a first plate vertically oriented and secured to and movable with said lift arms such that said first plate maintains a vertical orientation upon displacement of said lift arms, a second plate vertically disposed parallel to and opposite said first plate and rotatably mounted to said first plate such that said second plate can rotate about its geometric center, means for rotating said second relative to said first plate, a load support assembly comprising:

a first link arm vertically disposed and pivotally mounted to said second plate at the upper end, a second link arm parallel to and opposite to said first link arm pivotally mounted to said second plate at the upper end, a linking member pivotally mounted to said first and second linking arm to maintain said linking arms in parallel alignment;

a hydraulic cylinder secured to said second plate at one end and one of said linking arms at the other end to impart side motion to said linking arm upon activation of said cylinder.

2. In combination with a vehicle having vertically displaceable lift arms, a load support assembly comprising:

a base plate pivotally mounted to said lift arms such that said base plate maintains a generally vertical orientation upon displacement of said lift arms;

a linking arm pivotally mounted to said base plate at one end and extending generally vertically;

a first lift fork pivotally mounted at one end to said other end of said linking arm and having a general extension outwardly from and perpendicular to said base plate and said linking arm;

a second lift fork;

a member pivotally mounted to said first lift forks such that said lift forks maintain a generally opposite and parallel alignment;

first means for selectively adjusting the relative vertical position of said second lift fork with respect to said first lift fork and for selectively adjusting the relative longitudinal position of said lift forks relative to said base plate.

3. A load support assemble as claimed in claim 2 wherein said first means comprises a first hydraulic cylinder pivotally mounted to said base plate at one end and pivotally mounted to said linking arm at the other end;

and, a second hydraulic pivotally mounted to said base plate at one end and pivotally mounted to said second lift arm at the other end, having a generally vertical extention parallel to said linking arm.