Device for securing an add-on and a support in spaced-apart relation
AssigneeA. Raymond Et Cie
InventorVincent De Gelis
Life of this patent
Estimating the term…
Abstract
The invention relates to a device for fastening an add-on (21) and a support (20) at a distance from each other, comprising a plastic mounting nut (1), a plastic compensating bush (5) and a fastening screw (14) having a screw shank (15) from a hard material. A threaded arrangement (8, 9) having a first direction of thread is configured between the mounting nut (1) and the compensating bush (5). The screw shank (15) has an external thread (17) having a second direction of thread opposite the first direction of thread which is used to produce an internal thread in a channel section (12) configured in the compensating bush (5). When the fastening screw (14) is screwed in, the compensating bush (5) is automatically screwed out from the mounting nut (1).
Claims6
1-5. (canceled)
A device for securing an add-on (21) to a support (20) in spaced-apart relation, said device comprising;
- a mounting nut (1) that is fixedly connectable to said support (20) and has an internal thread (9) of a first thread direction, said mounting nut also having a screw channel (10) extending therethrough;
- a plastic compensating bush (5) having an external thread (8) mating with said internal thread (9) of said mounting nut (1) whereby said compensating bush (5) can be screwed into said mounting nut (1), said compensating bush (5) further including a channel section (12) aligned with said screw channel (10);
- a securing screw (14) operative to connect said add-on (21) to said compensating bush (5), said securing screw (14) including a screw shank (15) with an external thread (17) of a second thread direction opposite to said first thread direction, said screw shank being insertable into said screw channel (10) and into said compensating bush (5), said securing screw (14) made of a harder material than said compensating bush (5) and said screw shank (15) having an outer diameter which is larger than the inner diameter of said channel section (12), such that an internal thread can be formed in said channel section (12) by means of said external thread (17) of said screw shank (15);
- and
- said mounting nut (1) configured with a collar (18) that projects axially from channel section (12) into the region of said internal thread (9) and which, in the screwed-together arrangement of said mounting nut (1) and said compensating bush (5), said collar (18) is in engagement with a collar recess (19) which is complementarily configured in said compensating bush (5).
The device of claim 1, wherein said mounting nut (1) and said compensating bush (5) are made of a softer material than said screw shank (15), said mounting nut (1) comprising a channel section (13) that defines a portion of said screw channel (10) and whose inner diameter is smaller than the outer diameter of said screw shank (15), such that an internal thread can be formed in said channel section (13) of said mounting nut (1) by means of said external thread (17) of said screw shank (15) of said securing screw (14).
The device of claim 2, wherein said channel sections (12, 13) are smooth-walled.
The device of claim 1, wherein the end of said compensating bush (5) includes a bearing plate (7) that projects, radially beyond said external thread (8) of said compensating bush (5).
The device of claim 1, wherein said mounting nut includes a radially outwardly projecting bearing protrusion (4).
Dependencies are inferred from the claim text.