Automatically retracting chalk line marking tool

Details Automatically retracting chalk line marking tool Automatically retracting chalk line marking tool

1996-11-05

1998-10-20

Fulton, Christopher W.

Geometrical instruments

Straightedge type

Cord type

33413, B44D 338

Patent

active

058228748

ABSTRACT:
A pistol-shaped automatically retracting chalk-line dispenser comprises a three-member housing enclosing two separate chambers. The upper, chalk-receiving chamber, contains a double-walled chalk-line spool and a line-guiding roller. A seal on the chalk-line spool shaft prevents chalk dust from entering the second chamber, which contains drive gears, the line-retracting spring, and a trigger-actuated latching brake mechanism. In one embodiment, a finger-like projection from the trigger is initially brought to bear on a rotating cap to brake the rate of line retraction as the trigger is pulled rearwardly. If the trigger is pulled back more than a predetermined distance, the finger-like projection snaps into engagement between the teeth of a sprocket attached to the cap and thus locks the retraction mechanism.

REFERENCES:
patent: 1168851 (1916-01-01), Carter
patent: 1208068 (1916-12-01), Winchell
patent: 3888010 (1975-06-01), Hyde et al.
patent: 4192078 (1980-03-01), Lore et al.
patent: 4197656 (1980-04-01), Lane et al.
patent: 4565011 (1986-01-01), Karger
patent: 4592148 (1986-06-01), Longnette
patent: 4765557 (1988-08-01), Kahmann
patent: 4813145 (1989-03-01), Josey, Jr. et al.
patent: 5042159 (1991-08-01), Millen
patent: 5444919 (1995-08-01), Alves
patent: 5509616 (1996-04-01), Millen, Jr. et al.
patent: 5657551 (1997-08-01), Lin

Affiliated with

Also associated with

Rating

Automatically retracting chalk line marking tool does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatically retracting chalk line marking tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatically retracting chalk line marking tool will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-232373