Hand tool and a manufacturing method for a hand tool

Patent metadata

Field	Value
Publication number	US-2020078927-A1
Application number	US-201916553777-A
Country	US
Kind code	A1
Filing date	Aug 28, 2019
Priority date	Sep 6, 2018
Publication date	Mar 12, 2020
Grant date	—

Abstract

The present invention relates to a hand tool, comprising a tool member, of a first material, an elongated shaft, of a second material and a connecting member, of a third material comprising plastic. The elongated shaft further comprises a handle portion in a first end and an insert portion in a second end. The hand tool further comprises a sealing ring arranged to surround the insert portion to prevent leakage of the third material during manufacturing. A manufacturing method for such a hand tool is also presented, said method comprising arranging a sealing ring around an insert portion, arranging the insert portion and a tool member in a mold, injecting material comprising plastic in a cavity space so as to form a connecting member and removing the hand tool from the mold.

First claim

1 . A hand tool, comprising
a tool member, of a first material, an elongated shaft, of a second material, comprising a handle portion in a first end and an insert portion in a second end, wherein a connecting member, of a third material comprising plastic, arranged between the tool member and the elongated shaft for receiving the insert portion, of a second material, into a first cavity of the connecting member and joining the tool member and the elongated shaft, and receiving a part of the tool member into a different end of said cavity or into a second cavity of the connecting member, a sealing ring arranged to surround the insert portion, the sealing ring contacting the insert portion and the third material of the connecting member to prevent leakage of the third material onto the material of the elongated shaft during manufacturing, wherein the insert portion and connecting member fix the sealing ring to the hand tool, and wherein the elongated shaft comprises natural material.

2 . A hand tool according to claim 1 , wherein
the connecting member comprises a recess in the vicinity of the sealing ring.

3 . A hand tool according to claim 1 , wherein
the insert portion of the elongated shaft comprises a step for the sealing ring, such that the cross-sectional area at the location of the sealing ring is smaller than the cross-sectional area of the handle portion of the elongated shaft that is in immediate proximity to the sealing ring.

4 . A hand tool according to claim 1 , wherein
the insert portion of the elongated shaft is provided with a locking geometry for enhancing mechanical locking between the connecting member and the elongated shaft.

5 . A hand tool according to claim 1 , wherein
the insert portion of the elongated shaft is provided with at least one section having a different cross-sectional shape than the remaining insert portion.

6 . A hand tool according to claim 1 , wherein
said natural material is wood.

7 . A manufacturing method for a hand tool, wherein
said method comprises: arranging a sealing ring around an insert portion in a second end of an elongated shaft, arranging the insert portion of the elongated shaft and a tool member in a mold, such that the sealing ring contacts the mold and the insert portion to seal off a cavity space defined by the sealing ring, the insert portion of the elongated shaft, the tool member and the inside surface of the wall of the mold, injecting material comprising plastic in the cavity space so as to form a connecting member for joining the elongated shaft and the tool member, and removing the hand tool from the mold once the injected material of the connecting member has cured.

8 . A manufacturing method for a hand tool according to claim 7 , wherein
providing said insert portion with a step for positioning the sealing ring.

9 . A manufacturing method for a hand tool according to claim 7 , wherein
providing the insert portion of the elongated shaft with a locking geometry for enhancing mechanical locking between the connecting member and the elongated shaft.

10 . A manufacturing method for a hand tool according to claim 7 , wherein
providing the insert portion of the elongated shaft with at least one section having a different cross-sectional shape than the remaining insert portion.

11 . A manufacturing method for a hand tool according to claim 7 , wherein
providing a mold with a protrusion in the vicinity of the sealing ring for engaging with the sealing ring.

12 . A manufacturing method for a hand tool according to claim 7 , wherein
the elongated shaft comprises natural material.

13 . A manufacturing method for a hand tool according to claim 12 , wherein
said natural material is wood.

Assignees

• Fiskars Finland Oy Ab

Inventors

• Grundström Andreas
• Kemppi Mikko
• Lund Henrik
• Riikonen Jouni
• Masalin Petteri
• Huhtala Juha

Classifications

• B25G1/10

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

• B25G3/34 Primary

  by pressing the handle on the implements; using cement or molten metal, e.g. casting, moulding, by welding or the like · CPC title

• B29L2031/283

  Hand tools · CPC title

• B29K2711/14

  Wood, e.g. woodboard or fibreboard · CPC title

• B29C45/14467

  Joining articles or parts of a single article (B29C45/14377, B29C45/14385, B29C45/14581, B29C45/14614 and B29C45/006 take precedence) · CPC title