Corner fitting

• US 3,890,022 A
• Filed: 09/03/1974
• Issued: 06/17/1975
• Est. Priority Date: 09/03/1974
• Status: Expired due to Term

• Current Assignee: Howard R. Moon
• Original Assignee: Howard R. Moon
• Inventors: Moon, Howard R.
• Primary Examiner(s): Gilliam, Paul R.
• Assistant Examiner(s): Sakran, Victor N.
• Application Number:
  US05/502,538
• Time in Patent Office: 287 Days
• Field of Search: 312/257R,257SK,111,140 403/295,297,171,172,176
• US Class Current: 312/140
• CPC Class Codes: A47B 2220/11 Tripod parts
• CPC Class Codes: A47B 2230/04 Cubic corner parts joining sectional strips for furniture
• CPC Class Codes: A47B 47/0008 Three-dimensional corner connectors, the legs thereof being received within hollow, elongated frame members corner joints in general F16B12/44
• CPC Class Codes: A47B 47/0016 Node corner connectors, e.g. cubic
• CPC Class Codes: F16B 12/50 Metal corner connections
• CPC Class Codes: F16B 2012/446 with three-dimensional corner element, the legs thereof being inserted in hollow frame members
• CPC Class Codes: H02B 1/013 Profiles for cabinet frames
• CPC Class Codes: H02B 1/014 Corner connections for frameworks
• CPC Class Codes: Y10T 403/342 Polyhedral

Abstract

A corner fitting is provided in which from two to six tubes may be secured together in right angular relation. A square block forms the corner. By drilling a hole in the center of any surface of the block, an expandable rectangular fitting may be secured against this surface. By turning the tube ninety degrees in either direction, the expandable fitting will expand and securely lock the end of the tube to the block.

Claims

2. The structure of claim 1 and in which said indentations are at right angles to said notch.

3. The structure of claim 1 and in which said cross-pin comprises a split tubular expansion pin.

4. The structure of claim 1 and in which expandable member comprises a body generally rectangular in cross-section but including expansion grooves in the walls thereof which engage said tubular member.

5. The structure of claim 1 and including a multi-sided recess in one end of said expandable member and a similarly shaped projection on the cam plate engaging the recess in said expandable member to prevent relative rotation therebetween.

6. The structure of claim 1 and in which said first pin is longitudinally knurled for engagement in said block.

7. The structure in claim 1 and including a bearing plate between said resilient member and said square block.

8. The structure of claim 7 and in which said bearing plate includes a peripheral flange extending between the end of said tubular member and said square block.

9. The structure of claim 7 and including means on said bearing plate cooperable with said expandable member to prevent relative rotation thereof.

10. The structure of claim 1 and including a plurality of tubular members connected to said square block.