Circular cutter with a friction-provided plate

• US 6,874,397 B2
• Filed: 05/08/2003
• Issued: 04/05/2005
• Est. Priority Date: 05/08/2003
• Status: Expired due to Fees

• Current Assignee: P & F Brother Industrial Corporation
• Original Assignee: P & F Brother Industrial Corporation
• Inventors: Chang, Chiu-Tsun
• Primary Examiner(s): Shoap, Allan N.
• Assistant Examiner(s): BLAKE, CAROLYN T
• Application Number:
  US10/431,730
• Publication Number:
  US 20040221701A1
• Time in Patent Office: 698 Days
• Field of Search: 834/713, 834/73, 834/78, 834/83, 834/90, 835/81, 403/1, 403/187, 403/190, 403/230, 403/384, 292/306, 241/27, 745/023, 164/17, 248121-126, 248/200, 248/200.1, 248/231.9, 248/251
• US Class Current: 83/471.3
• CPC Class Codes: B23D 45/044 the saw blade being adjustable according to angle of cut B23D45/025 takes precedence
• CPC Class Codes: B27B 5/29 Details; Component parts; Accessories
• CPC Class Codes: Y10T 83/7613 Adjustable
• CPC Class Codes: Y10T 83/7697 Tool angularly adjustable relative to work-support
• CPC Class Codes: Y10T 83/7705 Adjustable angular relationship
• CPC Class Codes: Y10T 83/7726 By movement of the tool
• CPC Class Codes: Y10T 83/7788 Tool carrier oscillated or rotated
• CPC Class Codes: Y10T 83/8773 Bevel or miter cut

Abstract

A circular cutter includes a bracket-mounting part integrally formed with a base plate as a single piece. The bracket-mounting part defines a first abutting face. A bracket is pivoted to the bracket-mounting part through a pivot shaft. The bracket defines a second abutting face, and is formed with an arcuate slot. A cutter-holding arm is pivoted to the bracket. A friction-providing plate is interposed between the first and second abutting faces. A screw rod extends through the arcuate slot and the friction-providing plate to threadedly engage an inner thread in the bracket-mounting part.

Claims

1. A circular cutter comprising:

a base unit including a base plate having a top face, and a bracket-mounting part that is integrally formed with said base plate as a single piece and that projects uprightly from said top face, said bracket-mounting part defining a first abutting face that is transverse to said top face, and being formed with an inner thread that extends in a transverse direction relative to said first abutting face;

a pivot shaft extending in said transverse direction;

a bracket pivoted to said bracket-mounting part through said pivot shaft so as to be rotatable about said pivot shaft, defining a second abutting face that confronts said first abutting face, and formed with an arcuate slot that is disposed adjacent to said inner thread;

a cutter-holding arm mounted rotatably on said bracket;

a friction-providing plate interposed between said first and second abutting faces; and

a cutter-tilting lock including a screw rod that extends through said arcuate slot and said friction-providing plate in said transverse direction to threadedly engage said inner thread in such a manner that said friction-providing plate is tightly clamped between said first and second abutting faces when said screw rod is tightened, thereby preventing rotation of said bracket about said pivot shaft, and that said friction-providing plate is relieved from the clamping action when said screw rod is loosened, thereby permitting rotation of said bracket about said pivot shaft.

2. The circular cutter as defined in claim 1, wherein said friction-providing plate is made from steel, said bracket being made from iron by casting, said base plate being made from aluminum by casting.