US 10,946,462 B2Granted

Portable band saw

AssigneeMakita Corporation

InventorsToshiyuki Kani, Yuta Okuhira

Life of this patent

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Abstract

In a band saw that is provided with a tension adjustment mechanism in which tension for an band saw blade can be adjusted, first and second wheel support shafts are provided in paired first and second wheel support portions, respectively, such that the first support shaft is parallel to the second support shaft. The first wheel support portion is configured to be movable in a direction in which a straight line extends, the straight line being perpendicular to both the first and second wheel support shafts. A first support is provided at a first end of the first wheel support portion, and a second support is provided at a second end of the first wheel support portion. Furthermore, an intermediate support is provided between the first support and the second support. A first load and a second load are configured to be applied to the second support and the intermediate support, respectively, such that the first load and the second load are parallel to the wheel support shaft and the direction of the first load is opposite to that of the second load.

Claims20

Dependent claims

A portable band saw with tension adjustment mechanism, comprising:

a wheel support portion;
a wheel support shaft fixed to the wheel support portion and extending in an axial direction;
a first support at a first end of the wheel support portion;
a second support at a second end of the wheel support portion, the second support being configured to receive a first load;
and
an intermediate support between the first support and the second support that contacts the wheel support portion, the intermediate support being between the first support and the wheel support shaft such that a longitudinal axis of the intermediate support traverses the wheel support portion in a direction perpendicular to the axial direction of the wheel support shaft and is configured to supply a second load to the wheel support portion;
wherein:
the wheel support portion is configured to be movable relative to the intermediate support in a radial direction of the wheel support shaft;
the first load and second load are parallel to the axial direction of the wheel support shaft;
and
the direction of the first load is opposite to that of the second load.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/447,075Filed 20 Jun 2019
Priority: JP JP2018-12342828 Jun 2018
Published: US 2020/0001382 A12 Jan 2020
Granted: 16 Mar 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

B23D 55/104
With means to vary the distance between pulley or sprocket axes: including means to yieldably bias at least one pulley or sprocket
B23D 53/12
Machines or devices for sawing with strap saw-blades which are effectively endless in use, e.g. for contour cutting: hand-held or hand-operated…
B23D
Planing