Chalk line

Patent metadata

Field	Value
Publication number	US-9757977-B2
Application number	US-201514833952-A
Country	US
Kind code	B2
Filing date	Aug 24, 2015
Priority date	Aug 22, 2014
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A chalk line is disclosed herein. The chalk line may include a housing, a track, and a door. The housing may define a chalk chamber and an opening in communication with the chalk chamber. The track may be disposed adjacent the opening and may include a curved section. The door may be movable between a closed position preventing access to the chalk chamber through the opening and an open position allowing access to the chalk chamber through the opening, and the door may include one or more door segments pivotably connected to one another by one or more hinges.

First claim

That which is claimed is:

1. A chalk line comprising:
a housing defining a chalk chamber and an opening in communication with the chalk chamber;
a track disposed within the chalk chamber and adjacent the opening, the track comprising a curved section;
a door movable within the track between a closed position preventing access to the chalk chamber through the opening and an open position allowing access to the chalk chamber through the opening, the door comprising a plurality of door segments pivotably connected to one another by a plurality of hinges;
a spool disposed within the chalk chamber;
a line supported by the spool, the line comprising a first end extending outside of the housing; and
an end hook attached to the first end of the line and configured to removably engage the door.

2. The chalk line of claim 1 , wherein the door is made of a relatively flexible material.

3. The chalk line of claim 2 , wherein the relatively flexible material comprises polypropylene.

4. The chalk line of claim 1 , wherein the hinges comprise living hinges.

5. The chalk line of claim 1 , wherein the curved section follows a curved exterior shape of the housing.

6. The chalk line of claim 1 , wherein the curved section follows a curved exterior shape of the spool.

7. The chalk line of claim 1 , wherein the door further comprises an overmold portion disposed along an interior side of the door and extending over the hinges.

8. The chalk line of claim 1 , wherein the door further comprises a retaining member disposed along an exterior side of the door and configured to removably engage and retain a portion of the end hook.

9. The chalk line of claim 8 , wherein the housing comprises a projection configured to removably engage an aperture defined in the end hook.

10. The chalk line of claim 1 , further comprising a lock configured to maintain the door in the closed position.

11. The chalk line of claim 10 , wherein the lock comprises a projection disposed on one of the door and the housing, and a receptacle defined in another one of the door and the housing and configured to removably receive and retain a portion of the projection.

12. The chalk line of claim 1 , wherein the housing comprises a stop projection, and wherein the door further comprises a catch projection configured to engage the stop projection to limit movement of the door in an opening direction.

13. The chalk line of claim 1 , wherein the opening and the door define an access window when the door is in the open position, and wherein the access window has an area of approximately 0.616 in 2 .

14. The chalk line of claim 1 , wherein the opening and the door define an access window when the door is in the open position, and wherein the access window has an area greater than 0.5 in 2 .

15. The chalk line of claim 1 , wherein the opening and the door define an access window when the door is in the open position, and wherein the access window has an area greater than 0.6 in 2 .

16. The chalk line of claim 1 , wherein the opening and the door define an access window when the door is in the open position, and wherein the access window has an area between 0.6 in 2 and 0.7 in 2 .

17. The chalk line of claim 1 , wherein the opening and the door define an access window when the door is in the open position, and wherein the access window has an area between 0.5 in 2 and 0.8 in 2 .

18. The chalk line of claim 1 , wherein the opening and the door define an access window when the door is in the open position, and wherein the access window has an area between 0.6 in 2 and 0.75 in 2 .

19. A chalk line comprising:
a housing defining a chalk chamber and an opening in communication with the chalk chamber;
a pair of tracks disposed adjacent the opening, each of the tracks comprising a linear section and a curved section; and
a door movable within the tracks between a closed position preventing access to the chalk chamber through the opening and an open position allowing access to the chalk chamber through the opening, the door comprising:
a plurality of door segments pivotably connected to one another by a plurality of living hinges; and
an overmold portion disposed along an interior side of the door and extending over the living hinges.

20. A chalk line comprising:
a housing defining a chamber and an opening in communication with the chamber;
a track disposed within the chamber and along an interface between the chamber and the opening; and
a door movable within the track between a closed position preventing access to the chamber through the opening and an open position allowing access to the chamber through the opening, the door comprising a plurality of door segments pivotably connected to one another by a plurality of hinges.

Assignees

• Irwin Ind Tool Co

Inventors

• Deleo Anthony
• Parker Gregory David

Classifications

• B44D3/38 Primary

  Cord line chalkers · CPC title