Hand held band saw

• US 4,160,320 A
• Filed: 02/27/1978
• Issued: 07/10/1979
• Est. Priority Date: 04/06/1977
• Status: Expired due to Term

• Current Assignee: Best & Donovan N.A., Inc.
• Original Assignee: Best & Donovan N.A., Inc.
• Inventors: Wikoff, Mark W.
• Primary Examiner(s): Peters, Jimmy C.
• Application Number:
  US05/881,734
• Time in Patent Office: 498 Days
• Field of Search: 30/380, 83/814, 83/815, 83/816, 83/817, 83/798, 17/23
• US Class Current: 30/380
• CPC Class Codes: B23D 53/12 Hand-held or hand-operated sawing devices working with strap saw blades
• CPC Class Codes: B23D 55/082 Devices for guiding strap saw blades
• CPC Class Codes: B26D 1/46 having an endless band-knife or the like
• CPC Class Codes: B26D 7/00 Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting cutters B26D1/00; arrangements for guiding hand cutting tools B26B29/06; punching tools or dies, cutting-out knives or dies B26F
• CPC Class Codes: Y10T 83/7245 And angular relationship of axes

Abstract

A hand held band saw particularly adapted to split animal carcasses. The band saw includes a novel housing structure that permits quick and easy access to the housing'"'"'s interior for cleaning of the interior, and for installing a new endless saw blade. The band saw also includes a novel blade guide roller assembly, and a novel blade take-up assembly, which cooperate to permit quick and easy installation of an endless saw blade.

Claims

1. A hand held band saw comprising

a driven wheel housing, said driven wheel housing including a door hingedly mounted thereon,

an idler wheel housing, said idler wheel housing including a door hingedly mounted thereon, and

a crossbar section, said crossbar section rigidly connecting said driven wheel housing and said idler wheel housing, said crossbar section including a cover plate adapted to enclose the return run of an endless saw blade therethrough, said cover plate being held in assembled housing relation with said crossbar section upon closure of said idler wheel housing door and upon closure of said driven wheel housing door.

2. A hand held band saw as set forth in claim 1 wherein said housing structure includes

locater pins to preliminarily locate said cover plate in closure relation with said crossbar section prior to closure of said idler wheel housing'"'"'s door and said driven wheel housing'"'"'s door.

3. A hand held band saw as set forth in claim 1, said housing structure including

adjustable pressure means connected to said doors, said adjustable pressure means permitting said doors to maintain said cover plate in assembled housing relation with said crossbar section.

4. A hand held band saw as set forth in claim 1 wherein the axis of said driven wheel housing'"'"'s door is perpendicular to the cutting run of said band saw'"'"'s endless saw blade, and wherein the hinge axis of said idler wheel housing'"'"'s door is parallel to the cutting run of said band saw'"'"'s endless saw blade.

5. A hand held band saw as set forth in claim 1, said housing structure including

a V-shaped nose on the bottom edge of said idler wheel housing, and

a V-shaped nose on the mouth edge of said crossbar section.

6. An idler wheel housing for a band saw of the hand held type, said housing comprising

a main section and a door, the lower edge of said door and the lower edge of said main section cooperating to define a V-shaped nose at the bottom edge of said idler wheel housing, and

hinge means connecting said door and said main section, said hinge means permitting said door to open to expose the interior of said idler wheel housing.

7. An idler wheel housing as set forth in claim 6 wherein about one-half of said V-shaped nose is carried on said main section and about one-half of said V-shaped nose is carried on said door, the hinge axis of said door being parallel to the cutting run of said band saw'"'"'s endless belt, and including

at least one bar connecting said door and said main section, said bar permitting said door to swing down and under said main section upon opening of said door.

8. A tracking assembly for an endless saw blade of a hand held band saw, said tracking assembly including

a blade take-up assembly located with said saw'"'"'s idler wheel housing, said blade take-up assembly comprising

a slide plate slidably mounted on said idler wheel housing;

a mounting plate pivotally mounted to said slide plate, said mounting plate carrying said idler wheel in rotatable relation thereon,

a first adjuster connected to said slide plate and adapted to bear against said mounting plate, the position of said first adjuster relative to said slide plate determining the angular position of said idler wheel relative to said slide plate, and

a second adjuster connected to said slide plate and adapted to bear against said idler wheel housing the position of said second adjuster relative to said slide plate determining the position of said idler wheel relative to a driven wheel of said band saw,

and

an alignment roller assembly located in said band saw idler wheel housing and an idler roller assembly located in said saw'"'"'s driven wheel housing, each of said alignment roller assemblies comprising

an edge roller positioned to bear against the non-toothed edge of said endless saw blade,

two side face rollers, said side face rollers being disposed to bear against opposite sides of said endless saw blade, the rotational axes of said side face rollers being on a line angulated relative to the plane of said edge roller, and

a swing arm on which is mounted one of said side face rollers, said swing arm permitting said one side face roller to be adjusted relative to the other side face roller.