Vibration dampened hammer

Patent metadata

Field	Value
Publication number	US-9168648-B2
Application number	US-201213715690-A
Country	US
Kind code	B2
Filing date	Dec 14, 2012
Priority date	Dec 14, 2012
Publication date	Oct 27, 2015
Grant date	Oct 27, 2015

Abstract

A hammer that includes a handle and a head is provided. The head disposed on an upper end of the handle. The handle includes a core member; a rigid material layer molded on the core member; and a grip member molded on at least a portion of the rigid material layer. The grip member includes a first elastomeric material layer molded on the rigid material layer and a second elastomeric material molded on the first elastomeric material layer. The head has an eye portion extending through the head. The handle has at least a portion of its upper end extending into the eye portion. An epoxy resin material is positioned within the eye portion and is at least partially disposed between the handle and the head to secure the handle to the head. An elastomeric portion is at least partially disposed between the handle and the head.

First claim

What is claimed is:

1. A hammer comprising:
a handle having a bottom end and an upper end;
a head disposed on the upper end of the handle and having an eye portion extending through the head, the handle having at least a portion of its upper end extending into the eye portion;
an epoxy resin material positioned within the eye portion and being at least partially disposed between the handle and the head to secure the handle to the head; and
an elastomeric portion at least partially disposed between the handle and the head,
wherein the eye portion includes a circumferential inner surface, and wherein a bottom of the head comprises a lower annular surface portion joining with a lower portion of the circumferential inner surface, and
wherein the elastomeric portion is constructed and arranged to engage with the lower annular surface portion and the circumferential inner surface.

2. The hammer of claim 1 , wherein the handle and the head are separately formed structures.

3. The hammer of claim 2 , wherein the handle comprises a core member; a rigid material layer molded on the core member; and a grip member molded on at least a portion of the rigid material layer, wherein the grip member comprises a first elastomeric material layer molded on the rigid material layer and a second elastomeric material molded on the first elastomeric material layer and wherein the first elastomeric material layer is a different material from the second elastomeric material layer.

4. The hammer of claim 3 , wherein a Shore A durometer of the first elastomeric material layer is lower than a Shore A durometer of the second elastomeric material layer.

5. The hammer of claim 4 , wherein the first elastomeric material is a soft rubber material having a Shore A durometer of about 20 to about 60.

6. The hammer of claim 4 , wherein the second elastomeric material is a hard rubber material having a Shore A durometer of about 60 to about 80.

7. The hammer of claim 3 , wherein the core member is made of a fiberglass material.

8. The hammer of claim 3 , wherein the rigid material layer is a hard impact plastic material having a Shore D durometer of about 65 to about 90.

9. The hammer of claim 3 , wherein the rigid material layer is a polypropylene material.

10. The hammer of claim 3 , wherein the rigid material layer is formed between the core member and an annular bottom surface of the elastomeric portion.

11. The hammer of claim 3 , wherein the epoxy resin material and the elastomeric portion are configured to be in direct contact with core member.

12. The hammer of claim 3 , wherein the elastomeric portion is configured to be in direct contact with the epoxy resin material and in direct contact with the core member.

13. The hammer of claim 1 , wherein the elastomeric portion is made from a hard rubber material having a Shore A durometer of about 50 to about 90.

14. The hammer of claim 1 , wherein the epoxy resin material is a chemically cured, two part epoxy material.

15. The hammer of claim 1 , wherein the elastomeric portion has a Shore A durometer of about 60 to about 80.

16. The hammer of claim 1 , wherein the epoxy resin material has a Shore D durometer of about 60 to about 90.

17. The hammer of claim 1 , wherein the elastomeric portion is constructed and arranged to engage with entirety of the lower annular surface portion at forward portion of the lower annular surface portion aligned with the head.

18. A hammer comprising:
a handle having a bottom end and an upper end;
a head disposed on the upper end of the handle and having an eye portion extending through the head, the handle having at least a portion of its upper end extending into the eye portion;
an epoxy resin material positioned within the eye portion and being at least partially disposed between the handle and the head to secure the handle to the head; and
an elastomeric portion at least partially disposed between the handle and the head,
wherein the handle and the head are separately formed structures,
wherein an entire length of a core member, except a portion of the core member at a head and handle interface portion that is at the eye portion and a portion of the core member at a head and handle compliant portion that is at least partially disposed at the eye portion, is overmolded with the rigid material layer.

19. The hammer of claim 18 , wherein the elastomeric portion is overmolded on the core member at the head and handle compliant portion.

20. The hammer of claim 18 , wherein the elastomeric portion is constructed and arranged to create a compliant interface between the handle and the head in the head and handle compliant portion at the eye portion.

21. The hammer of claim 20 , wherein the elastomeric portion is constructed and arranged to isolate the core member from the head with the complaint interface and to reduce the amount of vibration transmitted from the head to the handle.

22. The hammer of claim 18 , wherein the epoxy resin material is disposed in the head and handle interface portion between the handle and the head to secure the handle to the head.

Assignees

• Stanley Black & Decker Inc

Inventors

• Lombardi Keith M

Classifications

• B25G1/02 Primary

  flexible (hammers heads having shock-absorbing means B25D1/12) · CPC title

• B32B37/24

  with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate (B32B37/15 takes precedence) · CPC title

• B25D1/12 Primary

  having shock-absorbing means · CPC title