Andrew Boychuk has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: A rock bolt (1) comprises a tubular body (4) defining a tubular bore (5) for receiving an adhesive or cement filled cartridge (18). A plug (8) is mounted in the bore (5). The plug (8) is displaceable along the bore (5) and sealingly engages the tubular body (4). A bolt head (7) is located at or adjacent a second end (3) of the rock bolt (1). A detent arrangement (10, 12) restrains the plug (8) in a position adjacent an opening at the first end (2) of the rock bolt (1).
Type:
Grant
Filed:
December 16, 2005
Date of Patent:
March 4, 2008
Assignee:
Dywidag-Systems International Pty Limited
Inventors:
Mieczyslaw Stanislaw Rataj, Andrew Boychuk
Abstract: A rock bolt (1) comprises a tubular body (4) defining a tubular bore (5) for receiving an adhesive or cement filled cartridge (18). A plug (8) is mounted in the bore (5). The plug (8) is displaceable along the bore (5) and sealingly engages the tubular body (4). A bolt head (7) is located at or adjacent a second end (3) of the rock bolt (1). A detent arrangement (10, 12) restrains the plug (8) in a position adjacent an opening at the first end (2) of the rock bolt (1).
Type:
Application
Filed:
December 16, 2005
Publication date:
July 13, 2006
Applicant:
DYWIDAG-SYSTEMS INTERNATIONAL PTY LIMITED
© 2024 Justia
