# US 8,739,414 B2 · Multi-purpose utility tool

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,739,414 B2
- Document ID: US8739414B2
- Status: Granted
- Kind: B2
- Application number: 12/047,797
- Filed: 2008-03-13
- Published: 2009-04-30
- Granted: 2014-06-03
- Earliest claimed: 2007-10-25
- Assignees: Quirky, Inc.
- Applicants: David Tyers
- Inventors: David Tyers
- Web page: https://patentgrep.com/patent/US8739414B2

## CPC

- B26B 11/00: Hand knives combined with other implements, e.g. with corkscrew, with scissors, with writing implement (combined table-ware A47G21/06)
- B25F 1/00: Combination or multi-purpose hand tools (associations of tools for different working operations with one portable power-drive means B25F3/00; {combined stapling and punching tools B25C5/0214})
- B26B 1/04: lockable in adjusted position
- B26B 5/00: Hand knives with one or more detachable blades
- B26B: HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR (for harvesting A01D; for horticulture, for forestry A01G; for butchering or meat treatment A22; for manufactering or repairing footwear A43D; nail clippers or cutters A45D29/02; kitchen equipment A47J; {vegetable slicers, julienne cutters and similar devices and holders therefor, B26D3/28}; for surgical purposes A61B; for metal B23D; cutting by abrasive fluid jets B24C5/02; plier-like tools with cutting edges B25B7/22; pincers B25C11/02; handles for hand implements, in general B25G; guillotine-type cutters B26D; {perforating by non-mechanical means, e.g. by fluid jet, B26F1/26}; for erasing B43L19/00; for textile materials D06H)
- B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)}

## Abstract

A multi-purpose utility tool which may include an elongated body member configured to slidably house a tool bit mounting device inside of the body member. The body member may be operable to receive the tool bit from within the body member and to expose the tool bit for use outside of the body member. The tool may also include a support device slidably cooperating within the body member. The support device may cooperate with the mounting device for rotatably holding the mounting device within the body member. In addition, the tool may include a locking device which also slidably cooperates within the body member. The locking device may also slidably mate with the support device and lock the support device within the body member at a desired location within the body member.

## Claims

### Claim 1

A utility knife comprising:
a blade mount component configured to accept a blade, said blade mount component comprising a square boss having rounded corners and a first width; and
a guide track component comprising a rectilinear slot having parallel sides, said rectilinear slot comprising three portions: a first portion having a second width, a second portion having a third width, and a third portion having a fourth width, said second portion being located between said first and third portions,
wherein said square boss is operable to slide within said rectilinear slot and thereby allow said blade mount component to be slidably attached to said utility knife,
wherein said second width is sufficiently larger than said first width to allow for linear movement of said square boss within said first portion and said second width is sufficiently small to prevent rotation of said square boss within said first portion,
wherein said third width is sufficiently larger than said first width to allow for rotation of said square boss within said second portion and to allow for linear movement of said square boss between said first portion and said third portion, and said third width is sufficiently small to limit movement of said square boss between said first portion and said third portion to an essentially linear movement,
wherein said fourth width is sufficiently larger than said first width to allow for linear movement of said square boss within said third portion and said fourth width is sufficiently small to prevent rotation of said square boss within said third portion, and
wherein rotation of said square boss corresponds to rotation of said blade mount component, thereby permitting rotation of a blade affixed to said blade mount component.

### Claim 2 (depends on 1)

A utility knife as in claim 1, wherein a blade affixed to said blade mount component is in a fully extended position in said utility knife when said square boss is located at a first end of said rectilinear slot and within said third portion, thereby preventing rotation of said square boss within said rectilinear slot.

### Claim 3 (depends on 1)

A utility knife as in claim 1, wherein a blade affixed to said blade mount is in a fully retracted position in said utility knife when said square boss is located at a second end of said rectilinear slot and within said first portion, thereby preventing rotation of said square boss within said rectilinear slot.

### Claim 4 (depends on 1)

A utility knife as in claim 1, wherein said square boss is operable to be rotated 360°, corresponding to 360° rotation of said blade mount component, thereby permitting a 360° rotation of a blade affixed to said blade mount component.