banner ad
Experts Logo

articles

Forensic Engineering Experts: Machine Guarding

By: Dr. Irving Ojalvo

Tel: (800) 358-9909
Fax: (888) 358-9901
Email: Technology Associates

View Profile on Experts.com.

Technology AssociatesThe primary function of all guarding is to prevent an operator or bystander from being injured by a potentially dangerous portion of a machine. Often the hazard involves moving parts with the potential to cut, crush or draw-in body parts, although barrier guards may also be necessary when electrical, thermal or chemical dangers are present. Guarding may be accomplished with simple physical shielding of machine parts, or more advanced techniques such as laser curtains. It is also often necessary to employ interlocks to disable power to the machine when a guard has been removed.

Expertise

We have extensive experience evaluating proper machine guard design and methods including:

  • Interlock design and implementation
  • Familiarization with guarding standards and effective warning design
  • Punch press pullbacks
  • Roller and nip-point guarding

Questions Answered

Through scientific analysis, we can help you answer pertinent questions such as:

  • Did the machine operator circumvent the guarding?
  • Were the pullbacks damaged or improperly adjusted?
  • Could a proper interlock have prevented this accident?
  • Were the machine's warnings adequate?

Case Examples

Damaged Pullback Hand Injury:

A machinist working on a press equipped with a pullback device suffered a crushed hand when it was caught in the point of operation. After inspecting the pullbacks, it was determined that one of the cable guide-tubes had been damaged. The damage allowed the pullback settings to be different for each hand. When the foreman set the pullbacks, he only tested the undamaged one. Thus, the damaged pullback permitted his other hand to remain at the point of operation and to be crushed by the ram.

Stone Screening Conveyor Belt Accident:

A worker at a stone-screening site attempted to service a conveyor belt while the screener was in operation. His sleeve became caught in the belt's tail pulley drawing him in and causing him to lose his arm. Prior to trial we determined that the locked door that contained the tail pulley was an appropriate guard and that the hostile environment would not permit an effective interlock. Thus, the worker was entirely at fault in this instance and was willing to accept a reduced settlement.


Dr. Irving Ojalvo was, at the time of this article's publication, the Chairman of Technology Associates (www.technology-assoc.com), a forensic engineering firm with offices in New York City and Connecticut. The firm's technical personnel, all of whom have advanced degrees, perform accident reconstruction involving issues of biomechanics, mechanical, traffic, and human factors engineering.

©Copyright - All Rights Reserved

DO NOT REPRODUCE WITHOUT WRITTEN PERMISSION BY AUTHOR.

Related articles

technology_associates_logo.gif

7/31/2009· Accident Investigation & Reconstruction

Forensic Engineering Experts: Electrical Fires

By: Dr. Irving Ojalvo

Electric fires are becoming more common as appliances and electric feeds are used more and more in our daily lives. Like other fires, the root cause of an electric fire is the introduction of heat, oxygen, and fuel.

Dick-Beaubien-Transportation-Engineer-photo.jpg

9/6/2017· Accident Investigation & Reconstruction

Case Study: Retained by Plaintiff Injured Motorist

By: Richard Beaubien

A motorist exiting a rural freeway was struck by a motorist on the intersecting State Route at the top of the exit ramp. At the westbound exit ramp from the Interstate freeway the State Route a stop sign is posted at the end of the ramp requiring exiting traffic to stop before entering the State Route. However, the eastbound off ramp traffic is not required to stop before entering the State Route. A stop sign is posted on southbound State Route at the ramp terminal. This is an unusual traffic signing pattern for interstate off ramps. Expert observations of the operation of this intersection showed that a large proportion of the eastbound off ramp traffic slowed down at the end of the ramp, expecting to stop at the State Route.

technology_associates_logo.gif

7/31/2009· Accident Investigation & Reconstruction

Forensic Engineering Experts: Codes & Standards

By: Dr. Irving Ojalvo

Codes and standards specify criteria necessary to ensure that a product, material or process will consistently and safely perform its intended function. Although standards provide minimum design requirements, conforming to a standard is not always sufficient in preventing an accident.

;
Experts.com-No broker Movie Ad
Unicourt Logo Button

Follow us

linkedin logo youtube logo rss feed logo