US3660896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Utility knife
Assignee: RUSSELL HARRINGTON CUTLERY Inc
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Filing: 1970-04-10
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Granted: 1972-05-09
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Expires: 1990-04-10
Abstract
Abstract A utility knife comprising two main parts forming a housing, one of said parts having a side opening therein for receiving blades in a stack and both parts having cooperating guideways for the reception of a sliding manually operated button having a freeended pin on it for engaging with a complementary notch in an edge of each blade, there being means providing that the freeended pin is spring-pressed to a position to enter a notch of the first blade only in the stack and being manually retractable therefrom to release the blade. The slider has two locking positions for the blade, one at either end of the housing; two blade-releasing positions adjacent the locking positions whereby the blade may be abstracted manually from either end of the housing, and centrally of the housing the slider has a change position for changing the extent of the blade from the ends of the housing.
Inventors
- 👤 Franklyn G Umholtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:54
CPC Classifications
B; B26; B26B; B26B5/00; B26B5/001
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
218 words
A utility knife comprising a handle, a recess in the handle for accepting a stack of knife blades, means in the handle providing a knife blade guideway from the stack to an end of the handle, a slider, interengaging means between the handle and the slider whereby the slider is slidable from the area of the stack to said end of the housing, means on the slider for engaging the initial blade of the stack of blades and moving the same from the stack to said end of the housing, and means locking said blade engaging means on the slider adjacent the said end of the housing with the blade held in fixed position with an end of the blade exposed, and means for releasing said blade engaging means on the slider from the blade so that the blade may be manually removed from the housing , a removable cover for the recess which receives the stack of blades, means holding the cover in removable position, and resilient means on said cover engaging the stack of blades and pressing the stack of blades toward the said slider, and a barrier wall against which the resilient means on the cover presses the blades, the slider being mounted at the opposite side of said wall from the stack of blades.
Claim 2
Dependent Claim
218 words
A utility knife comprising a handle, a recess in the handle for accepting a stack of knife blades, means in the handle providing a knife blade guideway from the stack to an end of the handle, a slider, interengaging means between the handle and the slider whereby the slider is slidable from the area of the stack to said end of the housing, means on the slider for engaging the initial blade of the stack of blades and moving the same from the stack to said end of the housing, and means locking said blade engaging means on the slider adjacent the said end of the housing with the blade held in fixed position with an end of the blade exposed, and means for releasing said blade engaging means on the slider from the blade so that the blade may be manually removed from the housing , a removable cover for the recess which receives the stack of blades, means holding the cover in removable position, and resilient means on said cover engaging the stack of blades and pressing the stack of blades toward the said slider, and a barrier wall against which the resilient means on the cover presses the blades, the slider being mounted at the opposite side of said wall from the stack of blades.
Claim 3
Dependent Claim
117 words
The knife of claim 1 wherein said interengaging means between the slider and the blade comprises a free-ended pin, said slider together with said pin being manually retractable out of engagement with said blade, and resilient means normally holding the slider in blade engaging position, said blade having a sharpened edge and a notched edge, said pin being adapted to extend into a notch in said edge to a limited degree in order to provide motion of the blade by means of the slider, there being a plurality of notches in the notched edge of the blade, said pin being enterable into any of said notches varying the longitudinal position of the blade relative to the slider.
Claim 4
Dependent Claim
56 words
The knife of claim 1 including a fixed plug arranged in the recess for the stack of blades and receiving said blades by means of notches in the blades, maintaining the blades in a stack and against canting of succeeding blades when an initial blade is moved back and forth in the housing by the slider.
Claim 5
Dependent Claim
54 words
The knife of claim 1 wherein the handle is elongated and comprises two parts secured together, the knife blade guideway being located between the two parts, and the recess for the stack of blades extending completely through one only of the handle parts, the initial blade in the stack abutting the other handle part.
Claim 6
Dependent Claim
218 words
A utility knife comprising a handle, a recess in the handle for accepting a stack of knife blades, means in the handle providing a knife blade guideway from the stack to an end of the handle, a slider, interengaging means between the handle and the slider whereby the slider is slidable from the area of the stack to said end of the housing, means on the slider for engaging the initial blade of the stack of blades and moving the same from the stack to said end of the housing, and means locking said blade engaging means on the slider adjacent the said end of the housing with the blade held in fixed position with an end of the blade exposed, and means for releasing said blade engaging means on the slider from the blade so that the blade may be manually removed from the housing, said blade engaging means includes a pin on the slider and said locking means comprises a recess in the housing in the path of movement of the pin, said locking recess being located at the opposite side of the blade from the slider, and the pin extending into the locking recess for locking the blade at said position, and being retractable to free it from the locking recess and from the blade.
Claim 7
Dependent Claim
218 words
A utility knife comprising a handle, a recess in the handle for accepting a stack of knife blades, means in the handle providing a knife blade guideway from the stack to an end of the handle, a slider, interengaging means between the handle and the slider whereby the slider is slidable from the area of the stack to said end of the housing, means on the slider for engaging the initial blade of the stack of blades and moving the same from the stack to said end of the housing, and means locking said blade engaging means on the slider adjacent the said end of the housing with the blade held in fixed position with an end of the blade exposed, and means for releasing said blade engaging means on the slider from the blade so that the blade may be manually removed from the housing, said blade engaging means includes a pin on the slider and said locking means comprises a recess in the housing in the path of movement of the pin, said locking recess being located at the opposite side of the blade from the slider, and the pin extending into the locking recess for locking the blade at said position, and being retractable to free it from the locking recess and from the blade.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |