Grout in place fastener system

A fastener system for securing an object to a surface comprising:

• an elongate member having a threaded first and to be embedded in a hole in the surface and a second external end having a fixed head thereon to effect turning of said elongate member in the hole,
• a securing agent means for pouring in the hole and to harden around said first end to form female threads cooperating with the male threads of said first end,
• a release agent applied to said first end to permit said elongate member to be turned in the hole after said securing agent has hardened, and
• means to effect tightening of said elongate member in the hole including means for preventing the filling in of the securing agent means immediately beyond the extremity of the first end, whereby the elongate member is threadable more deeply into the hole for tightening of the fastener system, said means for preventing the filling in of securing agent being secured to the first end of the elongate member and leaving a substantial portion of the threads on the member exposed for engagement with the hardening securing agent to form threads therein, wherby the threading of the elongate member more deeply in the hole is afforded by the mating threads of the elongate member and those formed in the securing agent, and is permitted by the means for preventing the filling in of the securing agent.

A fastener system for securing an object to a surface comprising:

• an elongate member having a two part shaft for location in a hole in the surface,
• a first part of the shaft having a threaded exterior for engagement by formed in situ threads of a hardenable securing agent introduced into the hole, terminating at one end in an extremity to be located most deeply in the hole, and terminating at a second end in an end surface having a threaded bore therein,
• a second part of the shaft having a smooth exterior, terminating at an end having exterior means for securing an object against the surface, and terminating at another end in a threaded, reduced diameter section adapted to thread into the bore at said second end of the first part of the shaft, and
• a release agent coating the smooth exterior of the second part, whereby the second part is releasable from the first part and from the hardened securing agent securing the first part in place in the hole.

A method of making a fastener system for securing an object to a surface, comprising the steps of

• forming in the surface a hole with an enlarged bottom,
• filling the hole with a hardening securing agent, inserting into the hole an elongate member having threads on at least a portion of the elongate member embedded in the hole,
• after hardening of the securing agent, tightening down an enlarged exterior part of the fastener system,
• the elongate member having a threaded external end and a reversely threaded interior end, the method further including the steps of providing a nut as the enlarged exterior part, the nut having only partly therethrough interior threads matching the external threads of the elongate member, introducing a compressible insert in the nut, wherein said step of tightening down comprises turning the nut and compressing the insert.

A method of making a fastener system for securing an object to a surface, comprising the steps of

• forming in the surface a hole with an enlarged bottom,
• filling the hole with a hardening securing agent, inserting into the hole an elongate member having threads on at least a portion of the elongate member embedded in the hole,
• after hardening of the securing agent, tightening down an enlarged exterior part of the fastener system,
• further comprising the step of excluding hardening securing agent from a location inward of and immediately adjacent the innermost tip of the elongate member, the step of tightening comprising threading the elongate member tip more deeply into the location free of securing agent after the agent has hardened.

A method of making a fastener system for securing an object to a surface, comprising the steps of

• forming in the surface a hole with an enlarged bottom,
• filling the hole with a hardening securing agent, inserting into the hole an elongate member having threads on at least a portion of the elongate member embedded in the hole,
• after hardening of the securing agent, tightening down an enlarged exterior part of the fastener system,
• the step of forming the hole further including forming an enlarged hole bottom by providing a mold part for use in molding the surface forming structure which comprises at least one elongate part with a laterally larger releasable element releasably secured at the end of the elongate part, and withdrawing the elongate part to leave behind the laterally larger releasable element to define the enlarged hole bottom.