Screw with a compound-squeezing piston

Patent metadata

Field	Value
Publication number	US-10100868-B2
Application number	US-201515129302-A
Country	US
Kind code	B2
Filing date	Mar 31, 2015
Priority date	Apr 1, 2014
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

A screw, especially a concrete screw, having a shank with a front end that is to be inserted into a hole drilled into a substrate, and a rear end as well as at least one thread arranged on the shank. It is provided that the screw has a squeezing piston that is situated in front of the front end of the shank, whereby a compound reservoir is provided between the squeezing piston and the shank.

First claim

What is claimed is:

1. A tapping screw comprising:
a shank with a front end to be inserted into a hole drilled into a substrate, a rear end and at least one thread arranged on the shank; and
a squeezing piston situated in front of the front end of the shank of the tapping screw, a compound reservoir containing a hardenable compound being provided between the squeezing piston and the shank of the tapping screw.

2. The screw as recited in claim 1 wherein the squeezing piston is joined to the shank by a threaded rod, a spindle drive being formed on the threaded rod and converting a rotation of the shank relative to the squeezing piston into a translatory movement of the squeezing piston relative to the shank.

3. The screw as recited in claim 2 wherein the spindle drive converts the rotation of the shank relative to the squeezing piston in a screwing direction of the at least one thread into a translatory movement as the squeezing piston approaches the shank.

4. The screw as recited in claim 2 wherein the threaded rod is arranged non-rotatably on the squeezing piston, and the shank has an internal thread, the threaded rod being screwed into the internal thread.

5. The screw as recited in claim 2 wherein the threaded rod is arranged non-rotatably on the shank, and the squeezing piston has an internal thread, the threaded rod being screwed into the internal thread.

6. The screw as recited in claim 5 wherein the thread and the shank are separate parts, the thread and the shank being coupled to each other by a non-rotatable plug-in connector.

7. The screw as recited in claim 1 wherein the squeezing piston projects radially beyond the shank, at least in certain sections.

8. The screw as recited in claim 1 wherein the squeezing piston has at least one thread section projecting radially.

9. The screw as recited in claim 1 wherein the squeezing piston has a sealing collar, and in that sections of the front end of the shank are accommodated in the sealing collar.

10. A method for the placement of the screw as recited in claim 1 into a hole drilled into a substrate, the method comprising:
cutting a mating thread into the substrate with the at least one thread; and
squeezing compound out of the compound reservoir with the squeezing piston.

11. A screw comprising:
a shank with a front end to be inserted into a hole drilled into a substrate, a rear end and at least one thread arranged on the shank;
a squeezing piston situated in front of the front end of the shank, a compound reservoir being provided between the squeezing piston and the shank; and
a threaded rod arranged non-rotatably on the shank, and the squeezing piston having an internal thread, the threaded rod being screwed into the internal thread.

12. The screw as recited in claim 11 wherein the thread and the shank are separate parts, the thread and the shank being coupled to each other by a non-rotatable plug-in connector.

Assignees

• Hilti Ag

Inventors

• Spampatti Matteo
• Nguyen Huu Toan

Classifications

• F16B13/141 Primary

  Fixing plugs in holes by the use of settable material · CPC title

• F16B39/225 Primary

  by means of a settable material · CPC title