Cutlery – Cutting tools – Saw
Patent
1991-05-15
1992-06-30
Watts, Douglas D.
Cutlery
Cutting tools
Saw
30383, B27B 1702
Patent
active
051251604
ABSTRACT:
An intertial-manual actuating chain brake for a chain saw in which a mechanical integrator distinguishes between relatively long duration accelerations developed by a "kickback" producing impulse and normal operating accelerations associated with operational and vibratory forces. Occurrence of a "kickback" impulse, developing a force of required magnitude, direction, and duration causes a spring-mass accelerometer to change from a brake released to a brake applied condition, applying a braking torque to the saw chain. The accelerometer utilizes a pivotable hand guard as the actuating means. The hand guard also provides for manual operation. The hand guard is comprised of a housing and an inertia weight that is connected to the housing. The weight and type of inertia weight can be selected to provide the brake applied condition for a predetermined movement of the chain saw or for a predetermined type of chain saw. The inertia weight can be adjusted to adjust the accelerometer.
REFERENCES:
patent: 3923126 (1975-12-01), Bidanset
patent: 4324045 (1982-04-01), Hoppner et al.
patent: 4420885 (1983-12-01), Todero
patent: 4553326 (1985-11-01), West
Textron Inc.
Watts Douglas D.
LandOfFree
Power tool inertia brake does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power tool inertia brake, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power tool inertia brake will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1854917