US4884342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Utility knife
Assignee: Individual
•
Filing: 1988-06-08
•
Granted: 1989-12-05
•
Expires: 2008-06-08
Abstract
Abstract A cutting device including a handle and blade. The blade being detachably connectable to the handle, and the handle including a guidance mechanism. This guidance mechanism has a convex peripheral edge and is rotatively connected to the handle. The cutting device also includes an engagement and disengagement mechanism for operatively interrelating the blade with the guidance mechanism.
Inventors
- 👤 William J. McNamara
- 👤 Stephen Keane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:39
CPC Classifications
B; B26; B26B; B26B5/00; B26B5/001; B26B5/002; B26B29/00; B26B29/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
175 words
A retractable, guided utility knife comprising: a. an elongated handle having a front end, back end, top edge and bottom edge, comprising a first half-handle sidewall secured to a second half-handle sidewall, at least one of said sidewalls having a lengthwise internal passageway and at least one of said sidewalls having a lengthwise external opening, said opening at least partially coextensive with said passageway; b. an elongated retractable blade slidably mounted between said sidewalls and extendable from said front end; c. a protruding member slidably mounted within said passageway and removably fixed to said blade; d. biasing means positioned against said blade for holding said blade against said protruding member; e. releasing means for moving said blade laterally against said biasing means, away from said protruding member, to release said blade from said protruding member; f. adjustment means slidably mounted within said opening, removably fixed to said blade, for moving said blade along said passageway; and g. roller means positioned at said front end, between said sidewalls, for guiding said blade along a cutting path.
Claim 2
Dependent Claim
175 words
A retractable, guided utility knife comprising: a. an elongated handle having a front end, back end, top edge and bottom edge, comprising a first half-handle sidewall secured to a second half-handle sidewall, at least one of said sidewalls having a lengthwise internal passageway and at least one of said sidewalls having a lengthwise external opening, said opening at least partially coextensive with said passageway; b. an elongated retractable blade slidably mounted between said sidewalls and extendable from said front end; c. a protruding member slidably mounted within said passageway and removably fixed to said blade; d. biasing means positioned against said blade for holding said blade against said protruding member; e. releasing means for moving said blade laterally against said biasing means, away from said protruding member, to release said blade from said protruding member; f. adjustment means slidably mounted within said opening, removably fixed to said blade, for moving said blade along said passageway; and g. roller means positioned at said front end, between said sidewalls, for guiding said blade along a cutting path.
Claim 3
Dependent Claim
12 words
A utility knife as in claim 1, wherein said blade is segmentable.
Claim 4
Dependent Claim
27 words
A utility knife as in claim 2, further comprising a wedged recess on the outer surface of said handle for breaking off a segment of said blade.
Claim 5
Dependent Claim
17 words
A utility knife as in claim 3, wherein said wedged recess is located on said back end.
Claim 6
Dependent Claim
19 words
A utility knife as in claim 1, further comprising a blade storage compartment for the storage of spare blades.
Claim 7
Dependent Claim
27 words
A utility knife as in claim 5, wherein said blade storage compartment is located on the side of one of said sidewalls and comprises a detachable cover.
Claim 8
Dependent Claim
42 words
A utility knife as in claim 1, wherein said blade has a hole along its side, said protruding member is removably inserted into said hole and said releasing means moves said blade such that said protruding member is removed from said hole.
Claim 9
Dependent Claim
17 words
A utility knife as in claim 1, wherein said handle comprises knurled ridges along said top edge.
Claim 10
Dependent Claim
35 words
A utility knife as in claim 1, where in a portion of said bottom edge, beginning at said back end and extending toward said front end, comprises a notched recess to facilitate gripping said handle.
Claim 11
Dependent Claim
16 words
A utility knife as in claim 1, wherein said roller means comprises a convex peripheral edge.
Claim 12
Dependent Claim
18 words
A utility knife as in claim 1, wherein said roller means are comprised of a resilient polyurethane material.
Claim 13
Dependent Claim
25 words
A utility knife as in claim 1, wherein the lengthwise axis of said elongated blade intersects said top and bottom edges at an acute angle.
Claim 14
Dependent Claim
29 words
A utility knife as in claim 1, wherein said roller means comprises two rollers, both rotatable about the same axis, and said elongated blade is extendable between said rollers.
Claim 15
Dependent Claim
19 words
A utility knife as in claim 13, wherein each of said rollers is in the shape of a frustrum.
Claim 16
Dependent Claim
17 words
A utility knife as in claim 1, wherein said protruding member is affixed to said adjustment means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |