Knife with replaceable blade

Cutlery – Holders for detachable blades – Knockdown holders

Patent

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Details

30329, B26B 308

Patent

active

057350515

ABSTRACT:
A utility knife for use with a flat blade having a pair of opposite faces has an elongated base part formed with an outwardly directed rear support surface, an outwardly directed front support surface separated longitudinally therefrom, and an inwardly directed intermediate surface between the support surfaces. The blade normally lies on the front support surface and projects longitudinally forward past the base part. An elongated cover part has an inwardly directed rear surface normally riding on the base-part rear support surface, an inwardly directed front surface normally pressing the blade inward against the base-part front support surface, and an outwardly directed intermediate surface. The cover part is displaceable longitudinally between one longitudinal end position with the intermediate surfaces transversely confronting each other and another longitudinal end position with the intermediate surfaces transversely out of alignment with each other. A biasing formation on at least one of the parts in the one longitudinal end position urges the cover-part intermediate surface transversely outward with a spring force into engagement with the base-part intermediate surface and thereby presses the front and rear cover-part surfaces toward the respective front and rear base-part surfaces.

REFERENCES:
patent: 1768604 (1930-07-01), Hurd
patent: 3078572 (1963-02-01), Everton
patent: 3171201 (1965-03-01), Carifi
patent: 4240202 (1980-12-01), Gilbert
patent: 4389776 (1983-06-01), Okada

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