Screw securing device

• US 5,676,511 A
• Filed: 09/05/1996
• Issued: 10/14/1997
• Est. Priority Date: 10/27/1995
• Status: Expired due to Fees

• Current Assignee: Alstom SA
• Original Assignee: Asea Brown Boveri AG (ABB Limited)
• Inventors: Meylan, Pierre
• Primary Examiner(s): Saether, Flemming
• Application Number:
  US08/707,602
• Time in Patent Office: 404 Days
• Field of Search: 411/103, 411/105, 411/120, 411/131, 411/134, 411/108, 411/107, 411/204, 411/371, 411/1, 411/373, 411/376, 411/413, 411/130
• US Class Current: 411/372.6
• CPC Class Codes: F16B 39/16 in which the screw-thread of the locknut differs from that of the nut

Abstract

In a screw securing device for a screw (1) by means of which a first component (2a) and a second component (2b) are clamped together, a bushing (5a, 5b), includes a cylinder (5a) and a base (5b) which contains a bore, the bushing being arranged in a first bore (3a) of the first component (2a). The first bore (3a) opens into a smaller, second bore (3b) of the first component (2a), and said second bore (3b) is provided with a left-handed thread (8) in which there is screwed a tubular extension (5c) which is arranged coaxially with the bore in the base (5b). The screw (1) is screwed, through the bushing (5a, 5b) and the tubular extension (5c), into the second component (2b) by means of its right-handed thread (7). A cap (6a), having an insert (6b) which is connected to the screw head in a positively locking manner, is fastened on the bushing (5a, 5b) by a welding bead (4).

Claims

1. A device for securing a screw by means of which a first component and a second component are clamped together, said first component including a first bore and a second bore, said second bore being smaller than said first bore and including first screw threads extending in a first direction, said device comprising:

a bushing including a cylinder and a base, said base containing a central bore, said bushing for being received in said first bore;

a tubular extension including screw threads for being screwed into said first screw threads and which is arranged adjacent said bushing and coaxially with said bore of said base;

a screw including a screw head and screw threads, said screw threads extending in a second direction, said second direction being opposite said first direction, said screw being arranged in said bushing and being screwed through said tubular extension; and

a cap welded on said bushing, said cap including an insert which is connected to said screw head in a positively locking manner.

2. A device for securing a screw by means of which a first component and a second component may be clamped together, said first component including a first bore and a second bore, said second bore being smaller than said first bore and including first screw threads extending in a first direction, said device comprising:

a bushing including a cylinder and a base, said base containing a bore, said bushing for being received in said first bore;

a tubular extension including screw threads for being screwed into said first screw threads and which is arranged adjacent said bushing and coaxially with said bore of said base;

a screw including a screw head and screw threads, said screw threads extending in a second direction, said second direction being opposite said first direction, said screw being arranged in said bushing and through said tubular extension; and

a cap for being welded on said bushing, said cap including an insert for connection to said screw head in a positively locking manner when said cap is welded to said bushing.