|Company: Delta Industries
Name of product:
Smart Handle Pro Ergonomic Plunger
evaluation number: #021
evaluation: December 14, 2002
materials (according to manufacturer):
with wall thickness .045 inches and plastic
handle ribbed vinyl, red rubber plunger.
Type of product:
designed to function as a toilet plunger while providing a secure grip that places the
hand in neutral position, which results in increased applied force. The handle length is
designed to keep the user in the upright position and out of the back-splash zone.
used in evaluation:
120A 0-6" Dial Calipers, Cal Date 01/10/02
100 S/N D 35542 Dynamometer, Cal Date 03/15/02
tape measure, English units
length 25.5 inches
length 24.25 inches
Force to operate
device: 25 lbs.
fall within the anatomical range and strength capabilities of the anthropometric data for
the U.S. Industrial Population from the 5th percentile female to the 95th
handle is a lighter weight material than wood or plastic, and the rigidity of the metal
provides for a more efficient transfer of force to the desired target. Due to the extended
handle length, the user is able to maintain an upright posture, which is inherently more
stable than a stooped or bent posture. Remaining upright, rather than bending, decreases
the stress to the spine, both in the lumbar area and in the neck area by preventing the
neck extension required to see the task while in a bent posture. This allows the user
better concentration and visual acuity. The upright posture also allows the user to apply
a greater compressive force to the plunger by using his or her body weight behind the
compression, as opposed to simply using the muscles of the arms. By keeping the
users hand in neutral position, the extrinsic muscles of the hand are used more than
the intrinsic muscles of the hand, which decreases the stress on the carpal tunnel.
Keeping the hand and wrist in the neutral position also decreases the stress on other
components of the wrist such as the carpometacarpal joints, the trifibrocartilage complex
and the first compartment complex (involved in De Quervains tenosynovitis.) Also,
with the hands and wrists in neutral position, both ulnar and radial deviation are
eliminated, which eliminates arthritis pain. By keeping the work close to the center of
gravity, the reach envelope is diminished, which decreases the strain on the shoulders and
have Ergonaut approval?
Gladden, EdD, CPE, CEM
Steve Davis, CEM
entitles Delta Industries International, Inc. to use the Ergonauts Official Seal of
Approval. This privilege expires on 12/31/05.