Patent US4178683A successfully refreshed from Google Patents.
US4178683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knife with removable blade
Assignee: Bettcher Industries Inc
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Filing: 1978-11-15
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Granted: 1979-12-18
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Expires: 1998-11-15
Abstract
Abstract A hand knife having a ring-like rotary blade the diameter of which is considerably greater than its axial length rotated by a motor in a handle extending normal to the axis of rotation of the blade. The blade of the knife is rotatably supported in a blade housing that surrounds it and which can be removed together with the blade for sharpening of the blade by merely loosening a pair of threaded fasteners. The knife also has a member in the interior of the blade which guides a part being removed from a product being processed through the central opening of the blade and interferes or restricts the movement of the part with the circular rotation of the blade thereby increasing the efficiency of the cutting operation. The material guiding and restricting member is connected to the knife by the same fasteners which connect the knife housing to the knife handle, may be angularly adjusted within the blade and/or may also be disassembled from the knife without removing the fasteners.
Inventors
- 👤 Louis A. Bettcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:14
CPC Classifications
B; B26; B26B; B26B25/00; B26B25/002
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
270 words
A hand knife suitable for use in the packing house and related industries comprising a handle assembly having a concave arcuate surface at one end with two tapped apertures opening thereinto, a drive gear adjacent to the arcuate surface of the handle assembly between the tapped apertures opening thereinto and rotatably supported in the handle assembly, a ring-like blade housing member of short axial length having portions of greater axial length at one end thereof having apertures therein, headed and threaded fasteners extending through the apertures in the housing member and threaded into the tapped aperture in the handle assembly detachably securing the housing member to the handle assembly, a ring-like blade member having an axial length about twice that of the housing member rotatably supported in the housing member and having a cutting edge at one end projecting from the housing member extending through an aperture therein and gear teeth at its opposite end in mesh with the drive gear, characterized by said knife having a split ring-like member within the blade thereof guiding the movement of a part of a product being severed from a product being processed in its movement through the blade connected to the handle assembly by the same fasteners which connect the housing member thereto and by the apertures in the housing member being slots opening into the end of the housing member opposite to the end from which the cutting edge of the blade projects, whereby the housing member and the blade carried thereby can be removed from the handle assembly without removing the fasteners connecting the housing member to the handle assembly.
Claim 2
Dependent Claim
270 words
A hand knife suitable for use in the packing house and related industries comprising a handle assembly having a concave arcuate surface at one end with two tapped apertures opening thereinto, a drive gear adjacent to the arcuate surface of the handle assembly between the tapped apertures opening thereinto and rotatably supported in the handle assembly, a ring-like blade housing member of short axial length having portions of greater axial length at one end thereof having apertures therein, headed and threaded fasteners extending through the apertures in the housing member and threaded into the tapped aperture in the handle assembly detachably securing the housing member to the handle assembly, a ring-like blade member having an axial length about twice that of the housing member rotatably supported in the housing member and having a cutting edge at one end projecting from the housing member extending through an aperture therein and gear teeth at its opposite end in mesh with the drive gear, characterized by said knife having a split ring-like member within the blade thereof guiding the movement of a part of a product being severed from a product being processed in its movement through the blade connected to the handle assembly by the same fasteners which connect the housing member thereto and by the apertures in the housing member being slots opening into the end of the housing member opposite to the end from which the cutting edge of the blade projects, whereby the housing member and the blade carried thereby can be removed from the handle assembly without removing the fasteners connecting the housing member to the handle assembly.
Claim 3
Dependent Claim
90 words
A hand knife as claimed in claim 1 in which the product guiding member has a portion of greater axial length at one end thereof extending in the direction away from the end through which the blade projects with apertures therethrough through which the fasteners that connect it to the handle assembly extend and are slots opening into the end thereof opposite to the end through which the blade projects whereby the guiding member can be removed from the handle assembly along with the blade housing member of independently thereof.
Claim 4
Dependent Claim
59 words
A knife as claimed in claim 1 in which the apertures in the product guiding member has a circumferential slot in a portion of greater axial length extending in the direction away from the end through which the blade projects through which the fasteners extend and which slot opens into an end of the portion of greater axial length.
Claim 5
Dependent Claim
66 words
A knife as claimed in claims 1 or 2 in which the apertures in the product guiding member through which the fasteners extend are axial slots opening into the end of the member other than the end nearest to the cutting edge of the blade and the closed ends thereof are connected to circumferential slots whereby the member can be adjusted circumferentially within the housing member.
Claim 6
Dependent Claim
173 words
As an article of commerce, a split ring-like product guide member for use within the ring-like blade member of a knife having a ring-like blade housing member of short axial length detachably connected to a handle assembly by headed and threaded fasteners extending through apertures in the housing member and a ring-like blade member having an axial length about twice that of the housing member rotatably supported in the housing member with its cutting edge projecting from the housing member characterized by said split ring-like product guide member being of short axial length and having parts of increased axial length extending from one end thereof at one side of the split, axial extending slots in said parts of increased axial length opening into the extending end thereof for attachment to the handle assembly by the same fasteners which connect the housing member to the handle assembly whereby the product gauge member can be assembled with and removed from the handle assembly without removing the fasteners connecting the housing member to the handle assembly.
Claim 7
Dependent Claim
173 words
As an article of commerce, a split ring-like product guide member for use within the ring-like blade member of a knife having a ring-like blade housing member of short axial length detachably connected to a handle assembly by headed and threaded fasteners extending through apertures in the housing member and a ring-like blade member having an axial length about twice that of the housing member rotatably supported in the housing member with its cutting edge projecting from the housing member characterized by said split ring-like product guide member being of short axial length and having parts of increased axial length extending from one end thereof at one side of the split, axial extending slots in said parts of increased axial length opening into the extending end thereof for attachment to the handle assembly by the same fasteners which connect the housing member to the handle assembly whereby the product gauge member can be assembled with and removed from the handle assembly without removing the fasteners connecting the housing member to the handle assembly.
Claim 8
Dependent Claim
21 words
An article as claimed in claim 5 in which the closed end of the slots therein terminate in short circumferential slots.
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) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |