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Tree Accidents (Stands) Expert Witnesses: 3
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Mechanical Product Liability Expert Witness John Ryan
John L. Ryan, BSME, PE
Business Headquarters:
PO Box 7
Poncha Springs, CO 8142
Offices in: CO, MI, AR, USA
phone: 855-627-6273
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
- Design Defect Analysis
- Structural Analysis of Buildings
- Product Liability Investigations
- General Engineering Injuries and Issues
- Industrial safety
- Engineering Continuing Education
- Product Certification
12/15/2015
· Accident Investigation & Reconstruction
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.
11/9/2015
· Accident Investigation & Reconstruction
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.
10/27/2015
· Accident Prevention & Safety
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.
7/27/2015
· Engineering
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?
6/29/2015
· OSHA
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.
5/26/2015
· Machinery
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.
5/7/2015
· Accident Investigation & Reconstruction
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.
4/7/2015
· Product Liability
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.
3/3/2015
· Accident Investigation & Reconstruction
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.
1/21/2015
· Product Liability
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.
12/10/2014
· Accident Investigation & Reconstruction
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.
11/4/2014
· Accident Prevention & Safety
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.
9/24/2014
· Accident Investigation & Reconstruction
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.
8/21/2014
· Accident Prevention & Safety
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.
7/17/2014
· Accident Investigation & Reconstruction
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.
6/10/2014
· OSHA
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.
5/7/2014
· Hazardous Materials
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.
4/7/2014
· Product Liability
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.
2/26/2014
· Failure Analysis
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.
1/22/2014
· Product Liability
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.
12/13/2013
· Accident Investigation & Reconstruction
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.
11/11/2013
· Failure Analysis
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.
10/15/2013
· Accident Investigation & Reconstruction
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.
9/26/2013
· Failure Analysis
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.
8/26/2013
· Accident Investigation & Reconstruction
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.
8/9/2013
· Accident Investigation & Reconstruction
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.
7/23/2013
· Warnings & Labels
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.
7/3/2013
· Failure Analysis
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.
6/14/2013
· Accident Investigation & Reconstruction
The Occupational Safety and Health Administration (OSHA) estimates that approximately 95,000 injuries occur each year due to forklifts.
5/14/2013
· Failure Analysis
Two and a half million rear-end collisions occur every year. Rear-end collisions are usually caused by driver inattentiveness.
4/2/2013
· Failure Analysis
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.
2/28/2013
· Accident Prevention & Safety
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.
12/27/2012
· Engineering
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.
Ergonomics Safety Expert Witness Jerry Purswell
Jerry Purswell
Human Factors, Ergonomics, & Safety Consulting
2050 SPRINGCREST RD
COLORADO SPGS CO
80920
USA
phone: 7193300126
fax: 719-265-6905
Dr. J. P. Purswell, PhD, PE, CPE has extensive experience in Human Factors, Ergonomics, and Safety Engineering. He holds a doctorate in Industrial & Systems Engineering from Virginia Tech. He has taught Safety Engineering and Ergonomics in the Industrial Engineering Department at CSU-Pueblo since 1999.
A member of the Human Factors and Ergonomics Society and the American Industrial Hygiene Association, Dr. Purswell also served as the Chair of the Industrial Engineers PE exam from 2005 to 2009. He continues to serve on the committee which is responsible for the preparation of the national professional engineering examination in industrial engineering.
Dr. Purswell is the author of more than 20 publications and presentations on Product Safety, Occupational Safety, Printed Warnings, and Auditory Warnings. Examples of products addressed include silica, asbestos, cleaning chemicals, gasoline containers, and recreational equipment. Dr. Purswell maintains NIST-calibrated equipment for the measurement of light, sound, force, and whole-body and hand-arm vibration in addition to standard photo and video equipment.
Litigation Support - An Expert Witness in the legal industry since 1997, Dr. Purswell has been qualified as an expert in state and federal courts across the nation in safety engineering, including safety analysis techniques such as Fault Tree Analysis and FMEA as well as product warnings / instructions and OSHA compliance issues. His services include site inspections, document review, drafting Rule 26-compliant reports, deposition, and trial testimony. He has been retained by attorneys for both Plaintiff (40%) and Defense (60%) more than 100 times, has been deposed approximately 50 times, and has testified at trial over 20 times.
Areas of Expertise:
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10/10/2013
· Ergonomics
In 2005 a summary of "General Duty Clause" citations issued for ergonomic hazards was published (Purswell & Purswell, 2005). That summary showed that the primary area of ergonomics citation activity under the "General Duty Clause" (paragraph (5)(a)(1) of the OSHAct of 1970) by OSHA to that point had been concentrated in nursing homes, peaking in 2002 and 2003.
8/29/2013
· Accident Investigation & Reconstruction
The purpose of the current study was to update and expand upon an earlier study performed to review and categorize OSHA accident investigation records for pedestrian-backing vehicle accidents according to whether the backing vehicle had a backup alarm and whether the alarm was installed and functioning as intended. The current study includes an analysis of additional records as well as the business type (SIC code) of the employer.
Forensic Engineer Expert Dr Rasty
Prof. J. Rasty, Ph.D., PE, MBA, CFEI, CFII
Founding President & CEO
2309 19th Street
Lubbock TX
79401
USA
phone: (806) 368-9811
fax: (806) 368-9812
Since 1988, Real-World Forensic Engineering, LLC ("RWFE") has provided engineering services to industries and government labs, as well as litigation support to both plaintiff and defense attorneys practicing in many areas.
RWFE Areas of Expertise Include:
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At RWFE, we proudly distinguish ourselves by our Four C's:
CREDENTIALS. COMPETENCE. CREDIBILITY. COMMUNICATION.
| Credentials: | B.S., M.S., M.Eng., M.B.A., J.D., and Ph.D. Degrees Licensed Professional Engineers in Mechanical, Electrical, and Civil Engineering Tenured University Professors and Professionals NAFI Certified Fire and Explosion Investigators (CFEI) Licensed Master Electricians |
| Competence: | Over 80 Combined Years of Experience in Engineering R&D, Industry, Academia, Consulting, and Expert Witness Litigation Support Over 120 Combined Deposition and Court Testimonies |
| Credibility: | Internationally Recognized in Our Areas of Expertise More Than $19 Million in Peer-reviewed and Funded Research Grants Over 200 Combined Scientific Publications and Journal Articles |
| Communication: | Over 20 Different Undergraduate and Graduate-level University Courses Over 30 Invited Short Courses, Talks, and Lectures |
Design Evaluation – Accident Investigation – Intellectual Property - Failure Analysis – Fire Cause & Origin – Component Testing - Computer Aided Drafting – Accident Animation - Expert Witness & Litigation Support
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