Artist's knife having an automatically retractable blade

• US 6,418,624 B1
• Filed: 09/29/2000
• Issued: 07/16/2002
• Est. Priority Date: 09/29/2000
• Status: Expired due to Fees

• Current Assignee: Huang, Harrison
• Original Assignee: Huang, Harrison
• Inventors: Huang, Harrison
• Primary Examiner(s): Peterson, Kenneth E.
• Assistant Examiner(s): FLORES SANCHEZ, OMAR
• Application Number:
  US09/672,301
• Time in Patent Office: 655 Days
• Field of Search: 30/2, 301/62, 303/35, 301/63, 302/89, 303/14, 303/29, 302/94, 303/49, 303/51, 303/37, 303/39
• US Class Current: 30/162
• CPC Class Codes: B26B 5/003 comprising retraction means for the blade or the blade holder

Abstract

An artist'"'"'s knife is formed of a main body, an end retaining member, a guide member, and an elastic member. The main body is provided in one side with a long hole. The end retaining member is disposed at one end of the main body. The guide member is movably disposed in the main body and is provided in one end with a notch in which a blade is disposed. The one end of the guide member can be extracted out of the main body to expose the blade. The elastic member is disposed between the retaining member and the guide member for providing the guide member with a recovery spring force enabling the guide member to return to its initial position after each displacement.

Claims

1. An artist'"'"'s knife comprising:

a main body of a rectangular construction and provided in an interior thereof with a receiving compartment and in two longitudinal ends thereof with a through port in communication with said receiving compartment, said main body provided in one side with a long hole extending along the longitudinal direction of said main body;

an end retaining member disposed at said through port of one end of said main body;

a guide member movably disposed in said main body such that said guide member moves along the longitudinal direction of said main body to jut out of said through port of other end of said main body, said guide member provided in one end with a notch and a push knob corresponding in location to said long hole of said main body;

a blade is disposed in said notch and one end angle portion is jutted out of the notch, said blade is concealed in said main body at the time when said guide member is not jutted out of said main body, and that said blade is jutted out of said main body at the time when said guide member is jutted out of said main body;

an elastic member disposed in said main body such that one end of said elastic member is retained by said end retaining member, and that other end of said elastic member is retained by said guide member, the spring provides the guide member with a recovery force enabling the guide member to return to its original position after each displacement;

wherein said main body is provided in said one side thereof with a through hole;

wherein said guide member is provided at one end with a pliable arm plate which is provided with a slanted protuberance whereby said slanted protuberance is retained in said through hole of said main body at the time when said guide member is not extracted out of said main body;

wherein said guide member is provided in two longitudinal sides thereof with a guide arm extending along the longitudinal direction of said guide member, said pliable arm plate is located between said two guide arms whereby said two guide arms are inserted into said main body;

wherein said two guide arms of said guide member are provided with a long guide groove; and

wherein said end retaining member has two long arm portions each is provided with a pillar extending along the short axial direction of said retaining member;

wherein said end retaining member is disposed in said main body such that said two pillars are located in said long guide grooves of said two guide arms.

2. The artist'"'"'s knife as defined in claim 1, wherein said end retaining member has a body plate portion which is provided at one longitudinal end thereof with an end cover portion, and at other longitudinal end thereof with said two long arm portions extending outward whereby said long arm portions are inserted into said through port of said one end of said main body such that said end cover portion is jutted out of said main body.

3. The artist'"'"'s knife as defined in claim 2, wherein said body plate portion of said end retaining member is provided in two longitudinal sides with a retaining projection;

wherein said main body is provided with two retaining holes corresponding in location to said retaining projection whereby said end retaining member is disposed in said main body such that said two retaining projections are retained in said two retaining holes.