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US3593930A Expired / Lapsed US ⏱️ 0.0 years remaining

Shredder

Assignee: RED CROSS Manufacturing CORP
•
Filing: 1970-09-11
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Granted: 1971-07-20
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Expires: 1990-09-11
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Abstract

Abstract A shredding machine having knives rotating about a vertical axis in a shredding housing. A hopper is positioned atop the housing and delivers material through an inlet to the shredding space. An outlet from the space is adjacent the inlet. Stationary baffles interfit with the rotating knives to cut and tear material within the housing.

Inventors

  • 👤 Robert D Lautzenheiser

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 09:27
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/06

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 132 words
A shredding machine including a housing defining a partially circular shredding space, vertically spaced, rotatable shredding knives within said space, and means for driving said knives about an axis generally coaxial with the center of said circular space, said housing having an upwardly open inlet and a laterally open outlet positioned side-by-side and adjacent the outer arc developed by said knives during rotation thereof, a feed hopper positioned over said inlet, said inlet and said outlet being defined by spaced outer walls and an intermediate wall dividing the space between said outer walls into said inlet and said outlet, the intermediate wall and the wall defining the outer wall of said inlet having vertically spaced slots on the inner portions thereof, said knives being formed and adapted to pass within said slots.
Claim 2
Dependent Claim 132 words
A shredding machine including a housing defining a partially circular shredding space, vertically spaced, rotatable shredding knives within said space, and means for driving said knives about an axis generally coaxial with the center of said circular space, said housing having an upwardly open inlet and a laterally open outlet positioned side-by-side and adjacent the outer arc developed by said knives during rotation thereof, a feed hopper positioned over said inlet, said inlet and said outlet being defined by spaced outer walls and an intermediate wall dividing the space between said outer walls into said inlet and said outlet, the intermediate wall and the wall defining the outer wall of said inlet having vertically spaced slots on the inner portions thereof, said knives being formed and adapted to pass within said slots.
Claim 3
Dependent Claim 35 words
The structure of claim 1 characterized by and including vertically spaced breaker bars in said shredding space and fixed to said housing at points spaced from said intermediate wall and said last named outer wall.
Claim 4
Dependent Claim 186 words
A shredding machine including a housing defining a partially circular shredding space, rotatable shredding means within said space, and means for driving said shredding means about an axis generally coaxial with the center of said circular space, said housing including spaced outer walls upstanding from a bottom wall, said walls being positioned at one side of the outer arc developed by said rotatable shredding means during rotation thereof, an intermediate partition wall structure upstanding from said bottom wall and between said outer walls to divide the space between said spaced walls into separate flow spaces positioned adjacent one another, said housing including a sidewall extending around said space and connected to said spaced outer walls, said housing including means defining a top wall overlying said shredding space and the space between said intermediate wall structure and one of said spaced walls whereby said spaced walls and intermediate wall define an upwardly open inlet and a laterally open outlet positioned adjacent one another, a rear wall extending between said intermediate wall structure and the outer wall defining the inlet, and a feed hopper positioned over said inlet.
Claim 5
Dependent Claim 186 words
A shredding machine including a housing defining a partially circular shredding space, rotatable shredding means within said space, and means for driving said shredding means about an axis generally coaxial with the center of said circular space, said housing including spaced outer walls upstanding from a bottom wall, said walls being positioned at one side of the outer arc developed by said rotatable shredding means during rotation thereof, an intermediate partition wall structure upstanding from said bottom wall and between said outer walls to divide the space between said spaced walls into separate flow spaces positioned adjacent one another, said housing including a sidewall extending around said space and connected to said spaced outer walls, said housing including means defining a top wall overlying said shredding space and the space between said intermediate wall structure and one of said spaced walls whereby said spaced walls and intermediate wall define an upwardly open inlet and a laterally open outlet positioned adjacent one another, a rear wall extending between said intermediate wall structure and the outer wall defining the inlet, and a feed hopper positioned over said inlet.
Claim 6
Dependent Claim 24 words
The machine of claim 3 wherein said rear wall is inclined downwardly and forwardly toward said space to direct material radially toward said space.
Claim 7
Dependent Claim 52 words
A shredding machine as set forth in claim 3 wherein said rotatable shredding means are defined by vertically spaced blades within said space, and the outer wall defining said inlet is extended inwardly into said shredding space and has vertically spaced slots therein for the passage of said rotatable shredding blades therethrough.
Claim 8
Dependent Claim 71 words
A shredding machine as set forth in claim 3 wherein said rotatable shredding means are defined by vertically spaced blades within said space, and breaker bar structures are positioned around said shredding space in spaced relation and extending into the arc developed by said blades during rotation thereof, said breaker bar structure being in the form of plate structures having vertically spaced slots therein for the passage of said blades therethrough.
Claim 9
Dependent Claim 89 words
The structure of claim 6 wherein said hopper has an upper wall surrounding an inlet opening to the hopper, said upper wall carrying a lid formed and adapted to overlie the inlet opening in said housing, the upper edge of said hopper and said lid having matching curvilinear portions positioned flush with one another to allow rotation of said lid to a selected angular position relative to the upper part of said hopper, and means for holding said lid in a selected position of adjustment relative to said hopper.
Claim 10
Dependent Claim 48 words
The structure of claim 6 wherein said driving means is a motor carrying said shredding blades on the output shaft thereof, said motor being secured to a section of said top wall overlying said shredding space, said top wall section and motor being detachably secured to said sidewall.
Claim 11
Dependent Claim 24 words
The structure of claim 8 wherein one of said breaker bar structures is formed as an extension of the outer wall defining said inlet.

References Cited (Backward Citations)

US2825377A Cited
US3412770A Cited
US3527278A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-07-19 1975-01-18 1975-07-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-07-19 1979-01-18 1979-07-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-07-19 1983-01-18 1983-07-20 $7700.00 Window Closed / Lapsed

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