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US 10,576,560 B2Granted
Band saw with twisting blade
AssigneesRobert Bosch Tool Corporation, Robert Bosch GmbH
InventorWilliam J. Shiel
Life of this patent
Estimating the term…
Abstract
A band saw includes a first blade guide assembly and a second blade guide assembly which guide the band saw blade through a cutting zone. The first blade guide assembly and the second blade guide assembly are each supported for pivotal movement about a pivot axis between a first angular position and a second angular position. At the first angular position, the first and the second blade guide assemblies hold the band saw blade at a first angle with respect to the wheel contact plane. At the second angular position, the first and the second blade guide assemblies hold the band saw blade at a second angle with respect to the wheel contact plane, the second angle being different than the first angle.
Claims11
A band saw comprising:
- a frame;
- a first wheel and a second wheel supported by the frame;
- a band saw blade wrapped around the first wheel and the second wheel and held in tension between the first wheel and the second wheel;
- a first blade guide assembly and a second blade guide assembly which guide the band saw blade through a cutting zone, the first blade guide assembly being arranged on a first side and the second blade guide assembly being arranged on a second side of the cutting zone;
- and
- wherein the first wheel and the second wheel define a tangential wheel contact plane that extends through the cutting zone,
- wherein the first blade guide assembly and the second blade guide assembly are each supported for pivotal movement about a pivot axis between a first angular position and a second angular position, the first blade guide assembly and the second blade guide assembly each being selectively lockable in the first angular position and the second angular position,
- wherein, at the first angular position, the first and the second blade guide assemblies hold the band saw blade at a first angle with respect to the wheel contact plane with the band saw blade tensioned for cutting,
- wherein, at the second angular position, the first and the second blade guide assemblies hold the band saw blade at a second angle with respect to the wheel contact plane with the band saw blade tensioned for cutting, the second angle being different than the first angle, and
- further comprising:
- a lever arm that extends between and connects the first blade guide assembly and the second blade guide assembly, the lever arm being configured to be moved manually by an operator of the band saw to pivot the first blade guide assembly and the second blade guide assembly simultaneously between the first angular position and the second angular position.
8 more elements
A band saw comprising:
- a frame;
- a first wheel and a second wheel supported by the frame;
- a band saw blade wrapped around the first wheel and the second wheel and held in tension between the first wheel and the second wheel;
- and
- a first blade guide assembly and a second blade guide assembly which guide the band saw blade through a cutting zone, the first blade guide assembly being arranged on a first side and the second blade guide assembly being arranged on a second side of the cutting zone, and
- a blade tensioning mechanism operably coupled to at least one of the wheels and configured to adjust tension of the band saw blade,
- wherein the first blade guide assembly and the second blade guide assembly are each pivotal about a pivot axis between a first angular position and a second angular position,
- wherein, at the first angular position, the first and the second blade guide assemblies hold the band saw blade at a first angle with respect to a wheel contact plane,
- wherein, at the second angular position, the first and the second blade guide assemblies hold the band saw blade at a second angle with respect to the wheel contact plane, the second angle being different than the first angle, and
- wherein the blade tensioning mechanism has a first position for tensioning the blade when the blade is oriented at the first angle in the cutting zone, a second position for tensioning the blade when the blade is oriented at the second angle in the cutting zone, and a third positioning for relaxing tension in the blade,
- further comprising:
- a lever arm that extends between and connects the first blade guide assembly and the second blade guide assembly, the lever arm being configured to be moved manually by an operator of the band saw to pivot the first blade guide assembly and the second blade guide assembly simultaneously between the first angular position and the second angular position.
9 more elements
Dependencies are inferred from the claim text.