CONCAVE FOR COMBINES

• US 3,734,103 A
• Filed: 12/13/1971
• Issued: 05/22/1973
• Est. Priority Date: 12/13/1971
• Status: Expired due to Term

• Current Assignee: Bernard C. Mathews
• Original Assignee: Bernard C. Mathews
• Inventors: Mathews, Bernard C.
• Primary Examiner(s): Guida, Antonio F.
• Application Number:
  US05/207,444
• Time in Patent Office: 526 Days
• Field of Search: 130/27J,27JT,27K,27L,27H,27HA
• US Class Current: 460/108
• CPC Class Codes: A01F 12/00 Parts or details of threshing apparatus devices, other than safety devices for feeders, for protecting human beings A01D75/20, A01F21/00
• CPC Class Codes: A01F 12/16 Safety devices
• CPC Class Codes: A01F 12/20 Threshing cylinders with ribs
• CPC Class Codes: A01F 12/28 Devices for adjusting the concaves
• CPC Class Codes: A01F 12/32 with shaker screens or sieves
• CPC Class Codes: A01F 12/34 Sieve elements; Linings for shakers
• CPC Class Codes: A01F 12/44 Grain cleaners; Grain separators
• CPC Class Codes: A01F 7/06 with axles in line with the feeding direction ; Axial threshing machines
• CPC Class Codes: B07B 1/286 with excentric shafts
• CPC Class Codes: B07B 1/42 Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens

Abstract

The concave has a removable blanking plate located beneath the concave bars. A transverse angle extending from one side plate to the other has horizontally and forwardly extending fingers which support the blanking plate so it can be removed in the forward direction. The front concave bar extends downwardly to block removal in the forward direction. The front concave bar is removably screwed to a cross plate to permit removal of the blanking plate. Access is provided by a door in the casing walls. A flange on the blanking plate engages the front ends of the fingers to prevent rearward movement of the blanking plate.

Claims

1. A concave for a combine comprising a grate structure having spaced side plates, a plurality of transverse concave bars extending from one side plate to the other and being secured thereto, a removable shelf located beneath the front part of said grate structure and spaced beneath the lower edges of said concave bars, and means for removably mounting said shelf, said shelf mounting means comprising a transverse member secured at each side end to said side plates, a plurality of brackets secured to said transverse member each having a forwardly extending finger located beneath said concave bars, said shelf comprising a plate member resting on the fingers of said brackets, and locating means to maintain said shelf at the front part of said grate structure so that it underlies the front portion thereof.

2. A concave as claimed in claim 1 in which said locating means includes downwardly extending stop means on said plate member engaging the front edges of said fingers to prevent rearward movement of said plate member.

3. A concave as claimed in claim 1 which includes a front plate disposed forwardly of said concave bars and extending from one side plate to the other and being secured thereto, a front concave bar removably mounted on said front plate and extending downwardly in front of said shelf to prevent removal thereof in a forwardly direction.

4. In a combine having a threshing cylinder, and a casing enclosing said threshing cylinder, the combination of a concave located beneath said threshing cylinder within said casing, said concave comprising a grate structure having spaced side plates, and a plurality of concave bars extending from one side plate to the other and being secured to said side plates, a front plate extending from one side plate to the other, a front concave bar removably mounted on said front plate, a shelf located beneath the front part of said grate structure and behind said removable front bar member, and means supporting said shelf in a position spaced beneath the first few of said first mentioned concave bars, said support means permitting withdrawal of said shelf therefrom in the forward direction after removal of said front concave bar from said front plate, said casing including side walls, and a door in each side wall located adjacent thE side edges of said removable front concave bar to provide access to same for removing same from said front plate and for removing said shelf from said support means.

5. In a combine having a threshing cylinder, and a casing enclosing said threshing cylinder, the combination of a concave located beneath said threshing cylinder within said casing, said concave comprising a grate structure having spaced side plates, a plurality of concave bars extending from one side plate to the other and being secured thereto, said concave bars having discharge spaces therebetween to accommodate downward movement of threshed crop material, a removable shelf located beneath the front part of said grate structure and spaced beneath the lower edges of said concave bars for blocking downward movement of threshed crop material at said front part, means for removably supporting said shelf, said casing including side walls, and a door in at least one side wall located to provide access to said shelf for removing said shelf from said support means.

6. A combine as claimed in claim 5 which includes locating means to maintain said shelf at the front part of said grate structure so that it underlies the front portion thereof.