Apparatus for manipulation of impactor hammers
AssigneeNordberg, Inc.
InventorsDavid J. Bechler, John S. Downs
Life of this patent
Estimating the term…
Abstract
An apparatus for manipulating horizontal impactor hammers includes a crossbeam and a pair of depending lift arms, each lift arm having a corresponding pivot arm configured to be secured to respective ends of the hammer and to pivot about the lift arm. Once the pivot arms are attached to the ends of the hammer, the crossbeam is elevated, withdrawing the hammer from the rotor and causing the hammer to invert about the pivot axis for reinsertion into the rotor. Provisions are also made for rotating the withdrawn hammer about a vertical axis.
Claims18
An apparatus for manipulating impactor hammers having opposing ends and being operationally located in an impactor rotor, the apparatus comprising:
- a crossbeam;
- a pair of lifting arms, each of said arms having an upper end configured to engage a corresponding portion of said crossbeam, and a lower end having a pivot point;
- a pivot arm pivotally secured to each of said lifting arms at said pivot point;
- and
- means for releasably attaching each of said pivot arms to a respective one of the ends of the impactor hammer when the hammer must be manipulated, so that as said crossbeam is lifted, the hammer is lifted from the rotor and selectively pivots with said pivot arms .
A system for manipulating the hammers for a rotor of a horizontal impactor, comprising:
- at least one elongate impactor hammer having opposing ends;
- an elongate crossbeam;
- a pair of lifting arms, each of said arms having an upper end configured to engage a corresponding portion of said crossbeam, and a lower end having a pivot pin secured thereto;
- a pivot arm pivotally secured to each of said lifting arms at said pivot pin;
- and
- means for attaching each of said pivot arms to a respective one of said ends of one of said at least one hammer.
A horizontal impactor hammer for use with a system for manipulating said hammer in the rotor of the impactor, the system including a crossbar and a pair of lift arms depending from said crossbar, each of said lift arms having a corresponding pivot arm configured for attachment to said hammer and for pivotal engagement with said lift arm, said hammer comprising:
- an elongate body with a pair of opposite ends, each of said ends having an etched indicator pattern for indicating the wear-induced sequence of manipulation of said hammer in the rotor;
- and
- at lease one vertically offset insert disposed on each end of said hammer and configured for engagement with the pivot arm.
Dependencies are inferred from the claim text.