US 8,186,031 B2Granted

Bushing replacement kit

OwnerWarren A. Whitney, Robert W. Hanna, Jr.inventors

Life of this patent

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Abstract

The bushing replacement kit includes components for reaming out a bushing passage in a mechanical structure, and for installing a new bushing in the passage. The reamer portion of the kit includes a reamer guide, which is secured precisely and immovably to the seal sleeve of the passage, the reamer having a pilot shaft that fits precisely within the guide. The guide is held in place by a guide retaining plate, which is clamped to the mechanical structure over the guide. When the reaming operation has been completed, the ream is removed and a threaded bushing installation shaft is passed through the guide and bushing passage. A new bushing is placed at the back of the passage, with a bushing installer placed in back of the bushing. A threaded fastener is installed on the installation shaft and tightened to force the new bushing into its passage.

Claims18

Dependent claims

A bushing replacement kit for reaming a bushing passage in a mechanical structure and replacing a bushing therein, the bushing replacement kit comprising:

at least one bushing passage reamer having an elongate pilot shaft, a drive shaft with a drive end opposite the pilot shaft, and a reamer body disposed between the pilot shaft and the drive shaft;
a reamer guide having a cylindrical seal sleeve insert extending therefrom, a cylindrical guide collar extending opposite the seal sleeve insert, a generally frustoconical shoulder disposed between the seal sleeve insert and the guide collar, and a pilot shaft passage defined therethrough, the pilot shaft of the bushing passage reamer fitting closely within the pilot shaft passage of the reamer guide;
an elongated reamer guide retainer plate having a guide collar passage disposed centrally therethrough;
means for fastening the retainer plate to the mechanical structure, the guide being adapted for being clamped between the retainer plate and the mechanical structure with the seal sleeve insert being seated in a seal sleeve of the mechanical structure in order to align the guide collar passage with a bushing passage in the mechanical structure;
a bushing installation shaft selectively passing through the reamer guide;
wherein the bushing installation shaft has a reamer guide pilot shaft end and a threaded shaft end opposite the reamer guide pilot shaft end, the reamer guide pilot shaft end fitting closely within the reamer guide;
a bushing installer selectively disposed upon the bushing installation shaft;
and
a bushing installation shaft nut, selectively secured upon the bushing installation shaft.

6 more elements

A bushing replacement kit for reaming a bushing passage in a mechanical structure and replacing a bushing therein, the bushing replacement kit comprising:

at least one bushing passage reamer;
wherein the bushing passage reamer has an elongate pilot shaft, a drive shaft with a drive end opposite the pilot shaft, and a reamer body disposed between the pilot shaft and the drive shaft;
a reamer guide, the bushing passage reamer extending through the reamer guide during reaming operations;
a reamer guide retainer plate adapted for clamping the reamer guide to the mechanical structure in alignment with a bushing passage in the mechanical structure;
a bushing installation shaft having a reamer guide pilot shaft end and a threaded shaft end opposite the reamer guide pilot shaft end, the reamer guide pilot shaft end fitting closely within the reamer guide;
a bushing installer having a cylindrical bushing insert body and a bushing press end flange extending radially from the body, the body having a bushing installation shaft passage formed concentrically therethrough, the bushing installer being selectively disposed upon the bushing installation shaft;
and
a bushing installation shaft nut selectively secured upon the threaded shaft end of the bushing installation shaft, the nut moving the bushing installer towards the reamer guide pilot shaft end of the bushing installation shaft as the nut is threaded farther onto the shaft.

5 more elements

A method of reaming out a bushing passage in a mechanical structure and replacing a bushing in the passage using a bushing replacement kit, the kit including:

at least one bushing passage reamer having an elongate pilot shaft, a drive shaft with a drive end opposite the pilot shaft, and a reamer body disposed between the pilot shaft and the drive shaft;
the method comprising the steps of:
(a) removing a rotary shaft from the bushing passage;
(b) installing a reamer guide concentrically with the bushing passage on a first side of the bushing passage;
wherein the reamer guide includes a cylindrical seal sleeve insert extending therefrom, a cylindrical guide collar extending opposite the seal sleeve insert, a generally frustoconical shoulder disposed between the seal sleeve insert and the guide collar, and a pilot shaft passage defined therethrough, the pilot shaft of the bushing passage reamer fitting closely within the pilot shaft passage of the reamer guide;
(c) clamping the reamer guide in place;
wherein the reamer guide is clamped in place using an elongated reamer guide retainer plate having a guide collar passage disposed centrally therethrough and a means for fastening the retainer plate to the mechanical structure, the guide being adapted for being clamped between the retainer plate and the mechanical structure with the seal sleeve insert being seated in a seal sleeve of the mechanical structure in order to align the guide collar passage with a bushing passage in the mechanical structure;
(d) inserting the reamer within the bushing passage from a second side of the bushing passage;
(e) reaming out the bushing passage;
(f) removing the reamer from the bushing passage;
(g) installing a bushing installation shaft through the reamer guide from the first side of the bushing passage;
wherein the bushing installation shaft selectively passes through the reamer guide and wherein the bushing installation shaft has a reamer guide pilot shaft end and a threaded shaft end opposite the reamer guide pilot shaft end, the reamer guide pilot shaft end fitting closely within the reamer guide;
(h) locking the bushing installation shaft rotationally relative to the reamer guide;
(i) placing a new bushing concentrically with the bushing passage and about the bushing installation shaft on the second side of the bushing passage;
(j) placing a bushing installer upon the bushing installation shaft, the installer abutting the new bushing;
wherein the bushing installer is selectively disposed upon the bushing installation shaft;
(k) threading a fastener onto the bushing installation shaft;
wherein the fastener is a bushing installation shaft nut, selectively secured upon the bushing installation shaft;
(l) tightening the fastener against the bushing installer on the bushing installation shaft to press the bushing installer against the new bushing into the bushing passage until the new bushing is completely seated in the bushing passage;
(m) removing the fastener and bushing installer from the bushing installation shaft and withdrawing the bushing installation shaft from the reamer guide;
(n) unclamping and removing the reamer guide;
and
(o) reinstalling the rotary shaft within the bushing passage.

20 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/213,646Filed 23 Jun 2008 · us provisional application
Priority: 9 Aug 2007
Published: US 2009/0038134 A112 Feb 2009
Granted: 29 May 2012
Term ends: Not estimatedThe source records don’t support an estimate.