Dual blade cutter

• US 6,557,258 B1
• Filed: 10/18/1999
• Issued: 05/06/2003
• Est. Priority Date: 10/18/1999
• Status: Expired due to Fees

• Current Assignee: Elizabeth M. Roberts
• Original Assignee: Elizabeth M. Roberts
• Inventors: Hollister, Roger S., Roberts, Elizabeth M.
• Primary Examiner(s): Peterson, Kenneth E.
• Assistant Examiner(s): FLORES SANCHEZ, OMAR
• Application Number:
  US09/420,032
• Time in Patent Office: 1,296 Days
• Field of Search: 30/15, 302/87, 301/34, 301/35, 302/33, 302/82, 302/84, 302/85, 302/89, 302/99, 303/01, 303/04, 303/15, 30D/IG.3, 30D/IG.8, 301/24, 839/46, 838/57
• US Class Current: 30/1.5
• CPC Class Codes: B26B 29/00 Guards or sheaths or guides for hand cutting tools; Arrangements for guiding hand cutting tools guards for hair clippers or dry shavers B26B19/38
• CPC Class Codes: B26B 3/04 for performing several incisions simultaneously; Multiple-blade knives

Abstract

A cutter, for cutting various surfaces having various curvatures, having a blade assembly and a housing. The blade assembly includes a first blade and a second blade, each having an inner edge and an outer edge, and a guide mounted between the first blade and second blade adjacent to the inner edges thereof. The first blade has a first cutting surface and the second blade has a second cutting surface which are each oriented toward the guide. The first cutting surface is convex toward the guide and the second cutting surface is concave toward the guide, wherein the user may cut concave or convex surfaces by selectively using one of the blades.

Claims

1. A cutter, comprising:

a first blade and a second blade, each of the blades having an outer edge and an inner edge, the first blade having a first cutting surface and the second blade having a second cutting surface;

a guide extending between the first cutting surface of the first blade and the second cutting surface of the second blade wherein both the first cutting surface and second cutting surface are oriented toward the guide;

wherein the first blade has a first blade tip and the second blade has a second blade tip, and wherein the guide extends beyond both the first blade tip and second blade tip; and

wherein the first cutting surface is convex toward the guide near the first blade tip and the second cutting surface is concave toward the guide near the second blade tip.

2. The cutter as recited in claim 1, wherein the guide comprises two symmetrical guide halves, each guide half having a horizontal surface which extends parallel to the horizontal surface of the other guide half, each guide half having a rear portion, a forward portion, and a buckle between the rear portion and forward portion, a central slot extends longitudinally along the rear portion and buckle of each guide half, such that the first blade and second blade each extend through the central slot of one of the guide halves.

3. The cutter as recited in claim 2, wherein the first blade and second blade each extend perpendicular to the horizontal surfaces of the guide halves, wherein the buckle has a rising portion adjacent to the rear portion and a falling portion adjacent to the front portion, and wherein the first cutting surface and second cutting surface pass through the central slot at the falling portion of the buckle.

4. The cutter as recited in claim 3, wherein a blade assembly is formed by the rigid combination of the first blade, second blade, and the guide, the blade assembly having a distal end, and further comprising a housing having an open end, the blade assembly mounted within the housing such that the blade assembly selectively enters an extended position wherein the distal end of the blade assembly extends beyond the open end of the housing, and a retracted position wherein the distal end of the blade assembly does not extend beyond the open end of the housing.

5. The cutter as recited in claim 4, wherein the housing has at least one side surface having a side opening, and wherein the guide has a actuation lever which extends through the side opening and allows the blade assembly to be moved between the extended position and the retracted position.

6. The cutter as recited in claim 5, wherein the housing further has an upper slot and a lower slot extending longitudinally into the housing from the open end for accommodating the outer edges of the first blade and second blade, respectively, and guiding said blades while the blade assembly is retracted and extended.