US3577637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractable blade knife
Assignee: Philip Morris USA Inc
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Filing: 1968-09-24
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Granted: 1971-05-04
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Expires: 1988-09-24
Abstract
Abstract An industrial blade holder combination with the blade being mounted on a carrier and selectively movable to retracted and operative positions including a position in which the blade is readily removable for replacement, the combination including a blade magazine for replacement blades, the magazine being replaceably mounted in the handle and arranged to enable individual blades to be dispensed therefrom for insertion in the handle while the magazine remains in the handle.
Inventors
- 👤 Paul A Braginetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:40
CPC Classifications
B; B26; B26B; B26B5/00; B26B5/001
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
In a knife having a handle, a blade carrier mounted for longitudinally slidable movement in a longitudinal passage therein to position selectively the blade in exposed operable or retracted protected positions, a first manually engageable tab connected to said carrier for effecting longitudinal movement thereof, and a second manually engageable tab having an elastic connection to said carrier with a locking lug engageable in an opening in the blade, said tab being moveable in an advanced blade exposed position to release said locking lug from the blade opening thereby to permit removal of the blade from the handle.
Claim 2
Dependent Claim
98 words
In a knife having a handle, a blade carrier mounted for longitudinally slidable movement in a longitudinal passage therein to position selectively the blade in exposed operable or retracted protected positions, a first manually engageable tab connected to said carrier for effecting longitudinal movement thereof, and a second manually engageable tab having an elastic connection to said carrier with a locking lug engageable in an opening in the blade, said tab being moveable in an advanced blade exposed position to release said locking lug from the blade opening thereby to permit removal of the blade from the handle.
Claim 3
Dependent Claim
23 words
A knife in accordance with claim 1 in which said first and second tabs are moveable along a common slot in the handle.
Claim 4
Dependent Claim
64 words
A knife in accordance with claim 2 in which said handle is comprised of opposed complemental halves and said slot along which the tabs are moveable is at an upper edge at the corresponding junction of the two halves and said first tab has an elastic connection to said carrier with a lug selectively positionable in notches at the under edge of said slot.
Claim 5
Dependent Claim
40 words
A knife in accordance with claim 2 in which said slot has an offset portion corresponding to said advanced position thereby to receive and permit lateral movement of said elastic support and correspondingly release the blade at said advanced position.
Claim 6
Dependent Claim
121 words
In a knife having a handle, a blade carrier mounted for longitudinally slidable movement in a longitudinal passage therein to position selectively the blade in exposed operable or retracted positions, said handle having a longitudinal slot along one edge, a manually engageable tab extending outwardly through said slot having an elastic connection to said carrier, a locking lug mounted on said blade carrier engageable in an opening in said blade, said slot comprising a track with an offset portion at its outer end providing a shoulder limiting advance of the carrier and blade to a locked cutting position, said elastic connection permitting lateral movement thereof into the slot offset portion and further advance of the carrier for removal of the blade.
Claim 7
Dependent Claim
121 words
In a knife having a handle, a blade carrier mounted for longitudinally slidable movement in a longitudinal passage therein to position selectively the blade in exposed operable or retracted positions, said handle having a longitudinal slot along one edge, a manually engageable tab extending outwardly through said slot having an elastic connection to said carrier, a locking lug mounted on said blade carrier engageable in an opening in said blade, said slot comprising a track with an offset portion at its outer end providing a shoulder limiting advance of the carrier and blade to a locked cutting position, said elastic connection permitting lateral movement thereof into the slot offset portion and further advance of the carrier for removal of the blade.
Claim 8
Dependent Claim
45 words
A knife in accordance with claim 5 in which said tab has a carrier positioning lug selectively engageable in notches at the inner edge of the slot releasable by inward depression of the tab transverse to said lateral movement of the elastic connection and tab.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |