Method for raising or lowering an object by davit apparatus with height adjustment feature

Abstract

The present invention relates to a method of providing an adjustable arm davit apparatus with height adjustable feature including, a base member, a shock absorber, a boom member, an adjustable arm, a winch assembly and a cylinder assembly. The boom member comprises a first member hingedly mounted on the base member and a second member mounted on the first member to adjust a height of the apparatus via the cylinder assembly disposed at the boom member. The adjustable arm is engaged to frontal ends of the boom member. The winch assembly positioned on the boom member for supplying a cable via a plurality of pulleys to attach the target object. The winch assembly is actuated to raise or lower the target object from the target location.

1 . A method for raising or lowering a target object from a target location, the method is characterized by:
 providing an adjustable arm davit apparatus with height adjustment feature comprising:
 a base member, 
 a hydraulic/electrical cylinder hingedly mounted on the base member, 
 a boom member having a first member hingedly mounted on the base member and a second member adjustably mounted on the first member for adjustable vertical movement, wherein the hydraulic/electrical cylinder is positioned between hinged ends and of the boom member, 
 a cylinder assembly at least two cylinders disposed between the first member and second member, wherein the at least two assembly is configured to provide adjustable vertical movement of the second member, 
 an adjustable arm slidably engaged to frontal ends and of the second member through an adjustable arm housing welded to the frontal ends and 
 a winch assembly positioned on the second member for supplying a cable via a plurality of pulleys positioned at predefined positions on the adjustable arm, and 
 a shock absorber hingedly mounted above the winch assembly and between the at least two cylinders; 
   actuating the at least two cylinders to provide adjustable vertical movement to the second member to adjust a height of the adjustable arm davit apparatus, and to compensate for any height of the target object;   aligning the at least one adjustable arm directly above an attachment member on the target object;   extending the adjustable arm to centrally position over the target object to compensate for any distance of the position of the target object from the adjustable arm davit apparatus, and to compensate for any width of the target object;   attaching the target object to ends of the cable via a fastening member   actuating a hydraulic actuator to extend or retract the at least one adjustable arm;   actuating the shock absorber based on load of the target object to prevent overstretching of the cable, and   actuating the winch assembly to raise or lower the target object from the target location.   
     
     
         2 . The method of  claim 1 , wherein the target object is a marine vessel. 
     
     
         3 . The method of  claim 1 , wherein the at least one adjustable arm is extended and retracted by an electric actuator or a hydraulic actuator. 
     
     
         4 . The method of  claim 1 , wherein the at least two-cylinder assembly comprises at least one of a hydraulic cylinder, mechanical cylinder, electrical cylinder or pneumatic cylinder.