Mechanical Engineering Product Liability Expert Witness John Ryan

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John L. Ryan, BSME, P.E. is a Mechanical Engineer who provides general Mechanical and Structural Engineering expertise. Mechanical and Safety Engineering (MASE) provides full service analysis and accident reconstruction of products involved in accidents.

Mr. Ryan's services have been requested for attorneys and insurance companies needing forensic engineering expert witness testimony to determine whether machinery and products involved in injury cases were adequately designed or whether they have a Design, Manufacturing, or Material Defect. All products are lab-tested on site to determine adherence to industry standards and engineering design protocol. Alternate preventative designs are developed when none exist commercially.

Mr. Ryan is available for both Plaintiff and Defense, depending on the individual case. His services include producing high quality reports and visual aids in the courtroom such as scale models to help explain accident scenarios and alternate designs to judges and juries.

Areas of Expertise:

Accident Investigation and Reconstruction
Machine Guarding Accident Investigation
Climbing Gym Accidents
Belay Device Failure
Rock Climbing Accidents
Fall Protection Failures
Ladder Failure Investigation
Tree Stand Failures
Industrial Accidents
Power Press Accidents
Connection Failures
Bolt Failures
Weld Failures
Testing Products to Industry Standards to Determine Compliance
Design Defect Analysis
Structural Analysis of Buildings
Product Liability Investigations
General Engineering Injuries and Issues
Industrial safety
Engineering Continuing Education
Product Certification

View John Ryan's Consulting Profile.

• John L. Ryan's Curriculum Vitae

• Consulting

• Product Liability

• Literature

• MASE Newsletter & Articles

12/15/2015 · Accident Investigation & Reconstruction

Forensic Clues: Tree Stand Accidents

By: John Ryan, BSME, PE

Tree stand accidents occur frequently during hunting season, causing a variety of injuries from broken bones to paralysis and death. Tree stand accidents involve a variety of causes, including falls from the tree stand, collapse of the tree stand, fires, self inflicted gunshot wounds, and asphyxiation. A study by the Center for Disease Control examined hunting accidents from 1979-1989. 214 of 594 deer hunting related accidents involved tree stands. 52% of these tree stand accidents were due to falls from the stand, 32% were due to collapse of the tree stands.

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11/9/2015 · Accident Investigation & Reconstruction

Forensic Clues: Ladder Accidents Part 2 - Extension Ladders

By: John Ryan, BSME, PE

This issue of Forensic Clues is the second installment of an examination of ladder accidents. Last month we explored stepladders, this month we will be discussing extension ladders. Ladder accidents are a very common occurrence. Over half a million people annually seek medical attention due to ladder accidents. Over three hundred people are killed yearly in these often preventable accidents. This is a serious problem.

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10/27/2015 · Accident Prevention & Safety

Forensic Clues: Ladder Accidents Part 1 - Stepladders

By: John Ryan, BSME, PE

Ladder accidents occur frequently, often with very serious consequences. Ladders are tools that people use repeatedly, at home and on the job. The CPSC (Consumer Product Safety Commission) states that there are more than 164,000 emergency room-treated injuries annually due to ladders in the United States.

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9/15/2015 · Fires & Explosions

Dust Explosions and Prevention

By: John Ryan, BSME, PE

A study by the National Fire Protection Association (NFPA) of important dust explosions in the U.S. from 1900 to 1956 found 1123 explosions. The type of material involved in the explosions ranged from wood, food and feed, plastics, coal, metals, paper, and chemicals. These explosions resulted in a total of 676 fatalities. The most frequent explosions consisted of food particle explosions. These accounted for over 50% of the total explosions. Wood dust explosions were also frequent, accounting for 14.5% of the total explosions.

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7/27/2015 · Engineering

Forensic Clues: Principles of Engineering Design

By: John Ryan, BSME, PE

The nursery rhyme involving Humpty Dumpty is a child's first lesson in safety. What would keep Humpty Dumpty safe as he is sitting on the wall? A warning or a railing?

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6/29/2015 · OSHA

Forensic Clues: Power Press Safeguarding

By: John Ryan, BSME, PE

The Bureau of Labor Statistics estimates that between 1,600 and 2,000 amputations occur annually due to power press operation. Another 18,000 people receive less serious injuries annually. Injury statistics compiled by OSHA for the years 1975 through 1983 confirm these figures. These numbers are alarming and unnecessarily high. Power presses can be used safely when the presses are properly designed to minimize the hazard that the operator is exposed to.

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5/26/2015 · Machinery

Forensic Clues: Agricultural Machinery - PTO Hazards

By: John Ryan, BSME, PE

Every year there are thousands of debilitating injuries and deaths on farms. Many of these are related to power take-off's (PTO's). PTO shafts are used to power various farming implements, from mowers, hay balers, augers, and many other types of farming machinery. The PTO shaft was invented in the 1930's. The PTO shaft is essentially a shaft powered by the tractor engine that rotates at high speeds, providing power for a wide array of implements. While this provides a convenient source of power to drive farm implements, serious accidents can occur due to entanglement in PTO's. PTO's must be properly equipped with guards including master shields which covers the stub shaft and universal joint. These shields prevent inadvertent contact with the rotating machinery. Contact with unshielded rotating PTO parts can instantly pull a person into the PTO, causing catastrophic damage.

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5/7/2015 · Accident Investigation & Reconstruction

Forensic Clues: Climbing Accidents

By: John Ryan, BSME, PE

Rock and ice climbing have become increasingly popular in recent years. Climbing is now a popular form of exercise and adventure, and a great way to enjoy the outdoors. Unfortunately the greater numbers involved in the sport has led to greater number of accidents. Climbing gyms have brought climbing to areas without outdoor rock resources. These indoor gyms use artificial holds to simulate rock walls. Indoor climbing gyms typically have climbs ranging from twenty feet to fifty feet, or more. Bouldering areas are shorter in height, with adequate padding to protect climbers from falls without the need for ropes.

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4/7/2015 · Product Liability

Forensic Clues: Failure to Maintain

By: John Ryan, BSME, PE

While many accidents involving products are the result of a product defect that leads to injury of the product user, accidents can also be the result of a failure caused by lack of maintenance or inspection. This issue of Clues will examine the theory behind failure to maintain accidents, as well as provide examples of common accidents that are due to a lack of maintenance.

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3/3/2015 · Accident Investigation & Reconstruction

Forensic Clues: Material Science and Accident Reconstruction

By: John Ryan, BSME, PE

Material science is a broad field that has applications in numerous fields. In product injury cases, material science can help identify defects, determine causes of accidents, determine failure modes, and identify inconsistent manufacturing processes.

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1/21/2015 · Product Liability

Forensic Clues: Products and Child Safety

By: John Ryan, BSME, PE

No one likes to see children get hurt, especially when it could be prevented. Poor design, manufacturing defects, material defects, assembly errors, and the lack of a hazard analysis can result in hazardous products that injure people. Many products are put in stores that may have never been looked at by a design engineer and/or a safety specialist.

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12/10/2014 · Accident Investigation & Reconstruction

Forensic Clues: Fishing and Boating Accidents

By: John Ryan, BSME, PE

Fishing and boating accidents result in thousands of injuries each year. The U.S. Coast Guard reported 3331 injuries and 709 fatalities due to boating accidents on both recreational and commercial vessels. There are many causes for these accidents, including collisions with objects or other vessels, drowning, electrical and mechanical failures, interaction with unguarded machinery, and others. There are various acts and laws that govern accidents at sea. This issue of Forensic Clues will examine some of the preventable accidents caused by defective machinery and equipment that occur at sea, and a brief overview of the laws and regulations affecting product liability litigation related to maritime accidents.

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11/4/2014 · Accident Prevention & Safety

Forensic Clues: Paintball Accidents

By: John Ryan, BSME, PE

Paintball is a fun activity for all ages, and can be a safe sport if proper precautions are made. Serious eye injury can occur if a paintball impacts the eyeball, making goggles and facemask a requisite part of paintball. Accidents happen in backyard paintball games most frequently, but also at commercial paintball operations. This Clues will examine the typical preventable paintball accidents, as well as examine product failures that can lead to accidents while playing paintball.

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9/24/2014 · Accident Investigation & Reconstruction

Forensic Clues: Accident Reconstruction

By: John Ryan, BSME, PE

Accident reconstruction involves attempting to determine the sequence of events of an accident and is a crucial part of product liability cases. Understanding exactly what occurred in an accident gives an engineer the best chance of preventing the accident from occurring again. Often there is limited information to base conclusions on what really happened in an accident. Understanding what goes into accident reconstruction will help attorneys understand what information is crucial to this process. Witness testimony is unreliable at best but must be analyzed and cross referenced with the other available information.

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8/21/2014 · Accident Prevention & Safety

Forensic Clues: Lawnmower Accidents

By: John Ryan, BSME, PE

Lawnmowers cause over 50,000 emergency-room visits every year, based on NEISS data on consumer product injuries. These injuries are distributed evenly between ride-on and walk-behind style mowers. The necessary cutting action of a mower results in an inherent hazard, until technology is developed that can cut grass but not living tissue. While various safety advances over the years have reduced the amount of injuries, the extremely high number of accidents related to mowers that continue to occur show the need for further enhancement of product safety.

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7/17/2014 · Accident Investigation & Reconstruction

Forensic Clues: Machine Guarding Accidents - Who is Responsible?

By: John Ryan, BSME, PE

Machine guarding accidents cause many accidents and fatalities every year, despite the availability of modern safety technology. In the years from 1992-1996, one study from the Bureau of Labor Statistics (BLS) reported annual injuries due to workers being caught in machinery of 34,350. In 2012 contact with an object or equipment had the second highest workplace fatality rate at 712 deaths.

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6/10/2014 · OSHA

Machine Guarding-Employer or Manufacturer Responsibility?

By: John Ryan, BSME, PE

OSHA was created through the Occupational Safety and Health Act of 1970. OSHA's mission is to ensure worker safety by creating and enforcing safety and health standards. OSHA does many good things to help maintain a safe workplace, but manufacturers often try to hide behind the shield of OSHA, putting blame on an employer for unsafe machinery or working conditions, when often the machinery was never safe to begin with. Some standards promote safety and some standards protect the manufacturer from product liability law suits. Most industrial standards are voluntary, unless they are specifically referenced in a Code of Federal Regulations / OSHA standard. OSHA standards are Federally mandated and are enforced by the Federal government.

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5/7/2014 · Hazardous Materials

Stored Energy Hazards and Accidents

By: John Ryan, BSME, PE

Stored energy is accumulated energy, which can release suddenly, potentially causing serious injury or death. Stored energy has many forms, including pressurized gases and liquids, stored mechanical energy, stored electrical energy, and gravitational potential energy. Stored energy is particularly dangerous because the hazard still exists when the original source of energy is removed. This issue of Clues will explain the various forms of hazardous stored energy, how these energies can cause damage or injuries, and how to prevent stored energy accidents.

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4/7/2014 · Product Liability

Advances in Table Saw Safeguarding-Saw Stop

By: John Ryan, BSME, PE

Table saw accidents occur frequently, often resulting in serious accidents when the operator comes in contact with the saw blade. The difficulties in guarding table saw blades with conventional guarding techniques often leads to ineffective guards that are removed by saw operators due to their lack of function and flexibility.

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2/26/2014 · Failure Analysis

Forensic Clues: Elderly Mobility Aids

By: John Ryan, BSME, PE

A significant number of elderly persons experience falls every year. In 2010, 2.3 million nonfatal fall injuries involving elderly people were treated in emergency rooms around the country. In the same year, 21,700 elderly people died as the result of unintentional falls. Falls for elderly people are extremely hazardous as they may not recover from fractures and other injuries.

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1/22/2014 · Product Liability

Forensic Clues: How to Survive in a Hostile Tort Reform Market

By: John Ryan, BSME, PE

Product Liability Reform has affected many attorneys, consumers, and experts negatively while failing in its goal of greater American competitiveness. This issue of Forensic Clues is dedicated to addressing the problems of tort reform, how this affects you, and what you as an attorney can do to reduce your costs and increase your chances of a successful product liability case, assuming that the case involves a legitimate product defect.

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12/13/2013 · Accident Investigation & Reconstruction

Forensic Clues: Skiing and Snowboarding Accidents

By: John Ryan, BSME, PE

A recent failure of a ski lift in Wisconsin has received much media attention. While accidents such as these are rare, they do occur. Much more frequent are accidents involving collisions with other people or objects. This issue of Forensic Clues will examine the types of accidents that occur on the mountains.

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11/11/2013 · Failure Analysis

Forensic Clues: Powered Winch Accidents

By: John Ryan, BSME, PE

Powered winches are in use in a variety of applications, some of the most common include vehicle-mounted electric winches, marine vessel winches, marine recovery winches, industrial winches and chain hoists. Accidents occur in all types of winch uses.

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10/15/2013 · Accident Investigation & Reconstruction

Forensic Clues: All-Terrain Vehicles

By: John Ryan, BSME, PE

Between 1982 and 1996, 2,795 people died riding all-terrain vehicles, ATV's. This was found in a study by the U.S. Consumer Product Safety Commission (CPSC). Over thirty percent of the riders killed were under the age of sixteen.

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9/26/2013 · Failure Analysis

Forensic Clues: Seat Belt Failure

By: John Ryan, BSME, PE

In 2007, an estimated 15,147 lives were saved from seat belt use. Seat belts save five times more lives than airbags, according to statistics released by NHTSA. Seat belt use has increased over the years, due to cultural trends, and possibly due to the enactment of seat belt use laws. Seat belt systems do not always function as predicted. Seat belt systems can fail during a collision, often resulting in serious injury or death to the vehicle occupant.

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8/26/2013 · Accident Investigation & Reconstruction

Forensic Clues: Tractor Accidents and Rollover Protective Structures

By: John Ryan, BSME, PE

Farming is a dangerous occupation. Tractor rollover accidents have been killing people since the 1920's. In 1990, the National Safety Council estimated 460 people were killed while operating tractors. Tractor rollover caused 239 of these fatalities. Another estimate suggests a more conservative number of annual fatalities - 132, that are the result of tractor rollover accidents. In a four-year period in Pennsylvania alone, 72 people died as a result of tractor rollover accidents.

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8/9/2013 · Accident Investigation & Reconstruction

Crash Data Retrieval - Modern Methods of Determining Crash Severity

By: John Ryan, BSME, PE

Automobile collisions result in damage to property and injuries to people. Compensation is sought through insurance claims, law suits, and product liability claims. Knowing when injuries are more or less severe than is warranted by the damage level involved in the collision is important information. This can help people involved on both sides of litigation or settlements.

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7/23/2013 · Warnings & Labels

Forensic Clues: Product Hazard Warnings

By: John Ryan, BSME, PE

Warning labels are an indelible part of our society. Warning labels are everywhere - on our food, on our drinks, on our sweeteners, on our cars, on our tools, on our cigarettes. As consumers we are constantly barraged with multitudes of warnings, cautions, don't do this's, don't do that's.

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7/3/2013 · Failure Analysis

Forensic Clues: Fiberglass Failure

By: John Ryan, BSME, PE

Safety Engineering Resources has had the opportunity to learn a great deal about using fiberglass in structural applications, which are simply applications that must support some sort of load. Using fiberglass as a structural material was brought about by the advances made by organic chemists in recent decades in the field of plastics.

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6/14/2013 · Accident Investigation & Reconstruction

Forensic Clues: Forklifts

By: John Ryan, BSME, PE

The Occupational Safety and Health Administration (OSHA) estimates that approximately 95,000 injuries occur each year due to forklifts.

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5/14/2013 · Failure Analysis

Forensic Clues: Rear-End Collisions and Automobile Seat Failure

By: John Ryan, BSME, PE

Two and a half million rear-end collisions occur every year. Rear-end collisions are usually caused by driver inattentiveness.

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4/2/2013 · Failure Analysis

Forensic Clues: Structural Failures

By: John Ryan, BSME, PE

Structural failures of buildings range from catastrophic building failures involving mass loss of life and/or property to structural problems such as sagging floors or ceilings, leaning walls, cracking or sinking foundations.

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2/28/2013 · Accident Prevention & Safety

Forensic Clues: Golf Carts

By: John Ryan, BSME, PE

Golf cart accident frequency has increased dramatically over the last 20 years. A study by Watson, Mehan, Smith, and McKenzie (Golf Cart-Related Injuries in the U.S., American Journal of Preventative Medicine, 2008) of NEISS data found 147,696 people were treated in emergency rooms for golf cart accidents between 1990 and 2006.

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12/27/2012 · Engineering

Forensic Clues: Is This a Valid Defective Product Case?

By: John Ryan, BSME, PE

Knowing when a personal injury case is due to the action or inaction of another party, or when responsibility falls fully on the injured party, can be a difficult distinction to make. At Mechanical and Safety Engineering, we have been investigating personal injury cases for decades.

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Related areas of expertise

Accident Investigation and Reconstruction Consumer Product Liability Design Engineering Fall Protection Solutions Industrial and Office Machinery Accident Prevention Mechanical Engineering Occupation Health and Safety / OSHA Compliance Power Tools Safety Product Safety Recreation and Sports Accidents Safety Engineering Tree Accidents (Stands)