Hammer

Patent metadata

Field	Value
Publication number	US-9233462-B2
Application number	US-201314059158-A
Country	US
Kind code	B2
Filing date	Oct 21, 2013
Priority date	Oct 21, 2013
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

Abstract

A striking tool includes a striking head, a passage extending through the striking head, and an elongated handle defining a longitudinal axis. The elongated handle has a mounting portion disposed in the passage, and the mounting portion includes a finger and a plurality of ribs extending outwardly from the finger to define a gap between the ribs and an internal wall of the passage. The striking tool further includes a resin filling a volume between the mounting portion and the passage to provide an adhesive bond between the striking head and the handle. The resin interlocks with the ribs to provide a mechanical bond between the striking head and the handle.

First claim

What is claimed is:

1. A striking tool comprising:
a striking head;
a passage extending through the striking head;
an elongated handle defining a longitudinal axis and having a mounting portion disposed in the passage, the mounting portion including a finger and a plurality of ribs extending outwardly from the finger to define a gap between the ribs and an internal wall of the passage; and
a resin filling a volume between the mounting portion and the passage to provide an adhesive bond between the striking head and the handle,
wherein the resin interlocks with the ribs to provide a mechanical bond between the striking head and the handle,
wherein the striking head includes a top side and a bottom side, and wherein the handle extends into the passage through the bottom side,
wherein the passage includes an inner wall that tapers inwardly from the top side to the bottom side, and
wherein each of the ribs includes a tip opposite the finger, and wherein each tip is spaced from the inner wall of the passage by a constant distance.

2. The striking tool of claim 1 , wherein the finger is one of a plurality of fingers, and a corresponding plurality of ribs extends from each of the fingers.

3. The striking tool of claim 1 , further comprising a magnet coupled to the top side of the striking head.

4. The striking tool of claim 1 , wherein a distal end of the handle is recessed beneath the top side of the striking head such that the distal end is completely encased by the resin.

5. The striking tool of claim 1 , wherein the passage has a teardrop shape.

6. The striking tool of claim 1 , wherein the head is made of Grade 5 titanium alloy.

7. The striking tool of claim 1 , wherein the handle includes a generally rigid core and a sleeve surrounding the core.

8. The striking tool of claim 7 , wherein the core is made of fiberglass and the sleeve is made of polypropylene insert-molded over the core.

9. The striking tool of claim 7 , wherein the mounting portion of the handle includes an upper portion of the core and an upper portion of the sleeve.

10. The striking tool of claim 9 , further comprising a transverse bore extending through the upper portion of the core, wherein the resin interlocks with the bore to provide an additional mechanical bond between the striking head and the handle.

11. The striking tool of claim 9 , wherein the upper portion of the core includes a pair of laterally-opposed, curved recesses, and wherein the resin interlocks with the recesses to provide an additional mechanical bond between the striking head and the handle.

12. The striking tool of claim 9 , wherein the finger and the ribs are defined by the upper portion of the sleeve.

13. The striking tool of claim 7 , wherein the handle further includes an elastomeric grip portion overmolded on the sleeve.

14. The striking tool of claim 1 , wherein the resin is a synthetic epoxy resin.

15. A method of attaching a striking head to a handle of a striking tool, the striking head including a top side and a bottom side, the handle defining a longitudinal axis and including a generally rigid core and a sleeve surrounding the core, the method comprising:
inserting a mounting portion of the handle into a passage extending through the head, the handle extending into the passage through the bottom side, the mounting portion including a finger and a plurality of ribs extending outwardly from the finger to define a gap between the ribs and an internal wall of the passage,
wherein the passage includes an inner wall that tapers inwardly from the top side to the bottom side, wherein each of the ribs includes a tip opposite the finger, and wherein each tip is spaced from the inner wall of the passage by a constant distance;
filling a volume between the mounting portion and the passage with a resin;
interlocking the resin with the plurality of ribs extending outwardly from the finger on the sleeve of the handle to provide a mechanical bond between the striking head and the handle.

16. The method of claim 15 , further comprising interlocking the resin with a transverse bore extending through the core to provide an additional mechanical bond between the striking head and the handle.

17. The method of claim 15 , further comprising interlocking the resin with a pair of laterally-opposed, curved recesses on the core to provide an additional mechanical bond between the striking head and the handle.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Laporte Zachary

Classifications

• B25D1/06

  Magnetic holders · CPC title

• B25G3/14 Primary

  comprising barbs or teeth · CPC title

• Y10T29/49993

  Filling of opening · CPC title

• B25G1/10

  characterised by material or shape (B25G1/01, B25G1/02 take precedence {; for hand tools comprising coating rollers B05C17/0205}) · CPC title