GRIPPER FOR HANDLING HEAVY PRODUCTS AND SPECIFICALLY HORIZONTAL-AXIS COILS

• US 3,655,232 A
• Filed: 06/13/1969
• Issued: 04/11/1972
• Est. Priority Date: 06/20/1968
• Status: Expired due to Term

• Current Assignee: Ghislain Antoine Jean-Marie Martelee
• Original Assignee: Ghislain Antoine Jean-Marie Martelee
• Inventors: Martelee, Ghislain Antoine Jean-Marie
• Primary Examiner(s): Blunk, Evon C.
• Assistant Examiner(s): Cherry, Johnny D.
• Application Number:
  US04/833,120
• Time in Patent Office: 1,033 Days
• Field of Search: 294/67,88,81,86,85
• US Class Current: 294/67.33
• CPC Class Codes: B66C 1/32 of piled or stacked articles
• CPC Class Codes: B66C 1/42 Gripping members engaging only the external or internal surfaces of the articles for handling or stripping castings or ingots during manufacture B22D29/00
• CPC Class Codes: Y10S 294/905 Wireless remote control device

Abstract

In a handling gripper for rigid products and specially coils there is provided a framework in the form of a rigid casing pivotally suspended from a vertical suspension pivot attached to a lifting hook. The casing houses horizontal telescopic arms operated by a horizontal ram and from which are suspended hollow vertical telescopic grasping arms each housing a vertical hydraulic ram connected to a compressed oil accumulator which supplies oil to said horizontal ram and to a rotating ram about the vertical suspension pivot, according to the position of a remotely controlled electromagnetic valve.

Claims

1. Handling gripper for rigid products such as coils having a horizontal axis, comprising a framework formed by a rigid hollow casing of a double T-shaped form, a fastening attachment to a lifting hook, a vertical suspension pivot carried by said fastening attachment and passing through a ball thrust bearing carried by said rigid hollow casing, horizontally telescopic arms housed in said hollow casing having two elements telescopic relative one to the other and relative to said hollow casing, vertical telescopic grasping arms suspended from the ends of said horizontally telescopic arms, a vertical hydraulic ram housed in each said vertical telescopic grasping arm, an oil accumulator receiving compressed oil from said vertical hydraulic ram, each said vertical arm having parts movable relative to each other when a load is lifted by said gripper, said relatively movable parts actuating said rams to send oil to said accumulator so as to recover a part of the potential energy of the handled load, a reserve tank containing oil under pressure, a horizontal hydraulic ram acting between said framework and one of said horizontally telescopic arms, means for supplying compressed oil from said accumulator to said horizontal hydraulic ram for actuating said horizontally telescopic arms, a rotating ram and means for supplying said rotating ram with compressed oil from said accumulator for rotating the gripper about said vertical suspension pivot.

2. Handling gripper according to claim 1 in which each vertical telescopic grasping arm comprises a fixed part unitary with the horizontally telescopic arms and on which is located a sliding sleeve terminating in a grasping nose for a coil, a vertical hydraulic ram being connected to said fixed part and to said sliding sleeve.

3. Handling gripper according to claim 2, in which said sleeve has longitudinal grooves in which roll ball races carried by said fixed part.