Snubbing apparatus for grapples and the like
AssigneeTimberjack Inc.
InventorThomas E. Johnson
Life of this patent
Estimating the term…
Abstract
A snubbing device for a suspended grapple or the like operable by pressurized fluid in a cavity between a pin and housing of a universal joint which actuates a ramp to cause a retarding reaction between the pin and housing to prevent free swinging of the grapple.
Claims8
A snubber for a bidirectional pivot apparatus for suspending a load comprising a bidirectional pivot member for supporting a pair of pins at right angles to each other, a pin extending through said bidirectional pivot member, a yoke having spaced arms mounted on said pin, snubber brake means positioned between said member and each of said arms and means for preventing said pin from moving axially relatively to said arms, the improvement comprising an elongated cylindrical snubber piston slidably mounted on said pin to actuate said snubber brake means, bearing means mounted on said pin supporting said cylindrical piston, said piston and bearing means forming a chamber with said pin and means to pressurize said chamber with a fluid.
A snubber for a bidirectional pivot apparatus for suspending a load comprising a bidirectional pivot member for supporting a pair of pins at right angles to each other, a pin extending through said bidirectional pivot member, a yoke having spaced arms mounted on said pin, snubber brake means positioned between said member and each of said arms and means for preventing said pin from moving axially relatively to said arms, the improvement comprising an elongated cylindrical snubber piston and a bearing means supporting said cylindrical piston forming a chamber with said pin to actuate said snubber brake means, a means of pressurizing said chamber with a fluid including a grease fitting mounted on the end of said pin and a bore extending from said grease fitting to said chamber.
Dependencies are inferred from the claim text.