Chain saw guide bar with liquid spray device

• US 5,426,854 A
• Filed: 01/21/1994
• Issued: 06/27/1995
• Est. Priority Date: 01/22/1993
• Status: Expired due to Fees

• Current Assignee: Kapman AB (Snap-On Incorporated)
• Original Assignee: Sandvik AB
• Inventors: Pettersson, Karl O., Lofgren, Per-Olof, Lindberg, Staffan, Leini, Arvo
• Primary Examiner(s): Peterson, Kenneth E.
• Application Number:
  US08/184,450
• Time in Patent Office: 522 Days
• Field of Search: 30/123.4, 30/383, 30/387, 30/123.3
• US Class Current: 30/123.4
• CPC Class Codes: A01G 2003/007 Using spray
• CPC Class Codes: A01G 23/091 Sawing apparatus specially adapted for felling trees A01G23/081, A01G23/083, A01G23/093 take precedence
• CPC Class Codes: A01G 23/099 Auxiliary devices, e.g. felling wedges
• CPC Class Codes: B27B 17/025 Composite guide bars, e.g. laminated, multisectioned; Guide bars of diverse material

Abstract

A chain saw guide bar allowing spraying of the cut surface of a stump with liquid, is made from three joined plates with a spraying device comprising one or more supply channels provided as cutouts in the central plate. A plurality of spraying holes are provided in one or both side plates. The spraying holes are offset towards the guide bar edge so far that less than the entire area of spraying hole area overlaps the edge of the supply channel.

Claims

1. A chain saw guide bar allowing spraying of the cut surface of the stump with liquid, comprising a guide bar made by joining one central plate and two side plates, the central plate containing one or more supply channels, at least one of the side plates containing a plurality of spraying holes, the supply channels being cutouts in the center plate and the spraying holes being cutouts in the at least one of said side plates, said spraying holes having an area and being transversely offset towards an edge of the guide bar to overlap the supply channels with only a fraction of the area of the spraying holes such that said liquid spray is oblique to said plates.

2. The chain saw guide bar according to claim 1, wherein the supply channels include branches, each channel having forward and rearward branches.

3. The chain saw guide bar according to claim 2, wherein the branches have diminishing cross section in a direction of liquid flow.

4. The chain saw guide bar according to claim 1, wherein the supply channel has a forwardly diminishing cross section.

5. The chain saw guide bar according to claim 1, wherein the spraying holes are provided in both side plates, the spraying holes in one side plate being spread over a greater length than the spraying holes in the other side plate.

6. The chain saw guide bar according to claim 1, wherein the supply channels are permanently lined with tubes.

7. The chain saw guide bar according to claim 1, wherein the spraying holes are offset by at least one half the area of the spraying holes.