Demolition hammer with reversible housing and interchangeable wear plate arrangement

Patent metadata

Field	Value
Publication number	US-9630308-B2
Application number	US-201414166809-A
Country	US
Kind code	B2
Filing date	Jan 28, 2014
Priority date	Dec 14, 2010
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A demolition hammer is provided that includes a housing that is reversible and a plurality of interchangeable wear plates. The demolition hammer may include a housing a housing having a first wall and a second wall opposite the first wall, and a power cell disposed within the housing, the power cell having a front face, wherein the housing is reversible such that the housing can be used with the power cell in a first orientation in which the front face faces the first wall and a second orientation in which the front face faces the second wall.

First claim

What is claimed is:

1. A demolition hammer, comprising:
a housing having a first wall and a second wall opposite the first wall,
a power cell disposed within the housing, the power cell having a front face, wherein the housing is reversible such that the housing can be used with the power cell in a first orientation in which the front face faces the first wall and a second orientation in which the front face faces the second wall; and
first and second wear plates, wherein the first and second wear plates are interchangeable and each of the first and second wear plates comprises a plate-like body having a first face, a second face generally parallel to the first face, the body defining a first pair of apertures positioned equidistant from a central longitudinal axis, each aperture configured to receive a first pin along a first axis and a second pin along a second axis, different than the first axis.

2. The demolition hammer of claim 1 , wherein each of the first and second wear plates comprises angled side edges adjacent the first face.

3. The demolition hammer of claim 2 , wherein the first axis is closer to the central longitudinal axis than the second axis.

4. The demolition hammer of claim 2 , wherein the body is symmetric about the central longitudinal axis.

5. The demolition hammer of claim 2 , wherein the body defines a second pair of apertures positioned equidistant from the central longitudinal axis, each aperture configured to receive a pin along a third axis, different than the first axis and the second axis.

6. The demolition hammer of claim 5 , wherein the third axis is approximately the same distance from the central longitudinal axis as the second axis.

7. The demolition hammer of claim 5 , wherein at least one of the first and second pairs of apertures is configured to receive pins of different shapes or sizes, nonconcurrently.

8. The demolition hammer of claim 1 , wherein at least one of the first or second wear plates include an angled top edge.

9. The demolition hammer of claim 1 , wherein at least one of the first or second wear plates include an angled side edge.

10. The demolition hammer of claim 1 , further including third and fourth wear plates, wherein all of the first, second, third, and fourth wear plates are interchangeable.

11. A demolition hammer, comprising:
a housing having a first wall and a second wall opposite the first wall,
a power cell disposed within the housing, the power cell having a front face, wherein the housing is reversible such that the housing can be used with the power cell in a first orientation in which the front face faces the first wall and a second orientation in which the front face faces the second wall;
a first wear plate interposed between the first wall and the power cell; and
a second wear plate interposed between the second wall and the power cell, wherein each of the first and second wear plates comprises a plate-like body having a first face, a second face generally parallel to the first face, the body defining a first pair of apertures positioned equidistant from a central longitudinal axis, each aperture configured to receive a first pin along a first axis and a second pin along a second axis, different than the first axis.

12. The demolition hammer of claim 11 , wherein each of the first and second wear plates comprises angled side edges adjacent the first face.

13. The demolition hammer of claim 12 , wherein the first axis is closer to the central longitudinal axis than the second axis.

14. The demolition hammer of claim 12 , wherein the body defines second pair of apertures positioned equidistant from the central longitudinal axis, each aperture configured to receive a pin along a third axis, different than the first axis and the second axis.

15. The demolition hammer of claim 14 , wherein the third axis is approximately the same distance from the central longitudinal axis as the second axis.

16. The demolition hammer of claim 14 , wherein at least one of the first and second pairs of apertures is configured to receive pins of different shapes or sizes, nonconcurrently.

17. The demolition hammer of claim 12 , wherein the body is symmetric about the central longitudinal axis.

18. The demolition hammer of claim 11 , wherein at least one of the first or second wear plates include an angled top edge.

19. The demolition hammer of claim 11 , wherein at least one of the first or second wear plates include an angled side edge.

20. The demolition hammer of claim 11 , further including third and fourth wear plates, wherein all of the first, second, third, and fourth wear plates are interchangeable.

Assignees

• Caterpillar Inc

Inventors

• Nickels James G
• Pillers Lauritz Phillip
• Craven Tommie Lee

Classifications

• Y10T29/49721

  with disassembling · CPC title

• E02F3/966

  of hammer-type tools (arrangements for breaking-up hard ground E02F5/305; percussion -type rippers E02F5/323) · CPC title

• B25D17/24 Primary

  Damping the reaction force {(resiliently mounted handles B25D17/043; dampers in connections of hammers to backhoes E02F3/966)} · CPC title

• E02F5/305

  Arrangements for breaking-up hard ground (E02F5/32 takes precedence; hammer-type tools E02F3/966; breaking-up paving of roads or the like E01C23/12; breaking-up subaqueous rock E02B3/02) · CPC title

• B25D17/28

  Supports; Devices for holding power-driven percussive tools in working position {(connections of hammers to backhoes E02F3/966)} · CPC title