Screw-retaining device and screw-retaining kit

Patent metadata

Field	Value
Publication number	US-11060552-B2
Application number	US-201716465681-A
Country	US
Kind code	B2
Filing date	Nov 15, 2017
Priority date	Dec 1, 2016
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

The present disclosure relates to a screw-retaining device ( 1 ) comprising a connecting element ( 2 ) which in turn comprises a first end part ( 3 ), a second end part ( 4 ) and an intermediate part ( 5 ) that connects the end parts ( 3, 4 ). The first end part ( 3 ) comprises an at least mainly circumferentially running part ( 6 ) that at least partly encompasses a retaining aperture ( 7 ) that is arranged to engage the threads ( 9 ) of a screw ( 100 ), and the second end part ( 4 ) is attached to an object ( 8 ). The screw-retaining device ( 1 ) further comprises a washer part ( 20 ) with a first and second washer portion ( 21, 22 ), having a corresponding first and second washer aperture ( 23, 24 ). The washer portions ( 20, 22 ) are connected and spaced apart by a gap ( 26 ), and the washer apertures ( 23, 24 ) admit passage of a screw stem ( 19 ). The first end part ( 3 ) is arranged to be positioned in the gap ( 26 ) before a screw ( 100 ) that is intended to be retained is mounted to the screw-retaining device ( 1 ) via the retaining aperture ( 7 ) and the washer apertures ( 23, 24 ). The present disclosure also relates to a screw-retaining kit.

First claim

The invention claimed is:

1. A screw-retaining device comprising a connecting element which in turn comprises a first end part, a second end part and an intermediate part that connects the end parts, wherein the first end part comprises an at least mainly circumferentially running part that at least partly encompasses a retaining aperture that is arranged to engage the threads of a screw that is intended to be retained, wherein the second end part is arranged to be attached to a separate object, wherein the screw-retaining device further comprises a washer part, the washer part comprising a first washer portion having a first washer aperture, and a second washer portion having a second washer aperture, wherein the first and second washer portions are spaced apart by a gap and are connected by at least one connecting washer portion, wherein the first and second washer apertures are aligned across the gap such that a combined washer aperture is formed that admits passage of a screw stem, wherein the first end part is arranged to be positioned in the gap before a screw that is intended to be retained is mounted to the screw-retaining device via the retaining aperture and the first and second washer apertures.

2. The screw-retaining device according to claim 1 , wherein a diameter (d relax ) of a largest circle within the retaining aperture in a relaxed state falls below a largest thread diameter (d tmax ) of a screw that is intended to be retained.

3. The screw-retaining device according to claim 1 , wherein the retaining aperture has an elongated form in a relaxed state, and where the retaining aperture is arranged to have said elongated form temporarily altered from the relaxed state to an expanded state such that an expanded retaining aperture is formed, wherein the diameter of a largest circle within the expanded retaining aperture is increased to an expanded circle diameter (d exp ).

4. The screw-retaining device according to claim 1 , wherein the washer part is made from thin sheet metal or a flattened thin walled pipe.

5. The screw-retaining device according to claim 4 , wherein the sheet metal forming the washer part is bent such that the first washer portion and the second washer portion of the washer part comprise two parallel flat surfaces that are arranged to be perpendicular to a longitudinal direction of a screw when the washer part is fitted onto the screw stem, wherein said first washer portion and the second washer portion are connected by an intermediate bent portion or portions serving as the connecting washer portion.

6. The screw-retaining device according to claim 1 , wherein each of the first washer portion and the second washer portion of the washer part is provided with a corresponding slit, the corresponding slits constitute washer apertures and are designed to face different directions of the respective washer portions and partly overlap each other to form the combined washer aperture through which the screw stem may be fitted.

7. The screw-retaining device according to claim 1 , wherein said first end part of the connecting element is in the shape of a loop.

8. The screw-retaining device according to claim 1 , wherein said first end part of the connecting element is made to be flexible and resilient.

9. The screw-retaining device according to claim 1 , wherein said connecting element at least partly is made of metal.

10. The screw-retaining device according to claim 1 , wherein said washer part is arranged to be fitted onto the screw stem together with said first end part of the connecting element such that said first end part is in contact with the screw.

11. The screw-retaining device according to claim 1 , wherein said washer part and the connecting element are separate elements.

12. A screw-retaining kit comprising a screw-retaining device in combination with a screw, the screw retaining device comprising:
a connecting element which in turn comprises a first end part, a second end part and an intermediate part that connects the end parts, wherein the first end part comprises an at least mainly circumferentially running part that at least partly encompasses a retaining aperture that is arranged to engage the threads of a screw that is intended to be retained, wherein the second end part is arranged to be attached to a separate object, wherein the screw-retaining device further comprises a washer part, the washer part comprising a first washer portion having a first washer aperture, and a second washer portion having a second washer aperture, wherein the first and second washer portions are spaced apart by a gap and are connected by at least one connecting washer portion, wherein the first and second washer apertures are aligned across the gap such that a combined washer aperture is formed that admits passage of a screw stem, wherein the first end part is arranged to be positioned in the gap before a screw that is intended to be retained is mounted to the screw-retaining device via the retaining aperture and the first and second washer apertures.

Assignees

• Husqvarna Ab

Inventors

• Sandwall Johan

Classifications

• F16B43/00

  Washers or equivalent devices; Other devices for supporting bolt-heads or nuts (circlips F16B21/18; {for indicating tensile load F16B31/02; forming a whole with the bolt or nut F16B33/00; locking bolts or nuts by means of a fixed plate or ring, or washer-like resilient plates F16B39/10, F16B39/24}) · CPC title

• F16B21/20

  for bolts or shafts without holes, grooves, or notches for locking members {(by rings resilient in their plane F16B21/18)} · CPC title

• F16B41/00

  Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins ({locking of screws, bolts or nuts F16B39/00;} seals G09F3/00) · CPC title

• B28D7/00

  Accessories specially adapted for use with machines or devices of the preceding groups {(B28D5/0058 takes precedence)} · CPC title

• F16B39/00

  Locking of screws, bolts or nuts ({F16B35/005 takes precedence}; locking of bottle closures B65D; locking of rail-fastening bolts for permanent ways E01B9/12; locking of fastening means for railway fishplates E01B11/38; locking devices for valves or cocks F16K) · CPC title