PET grew out of a 1994 trip by Methodist missionary Reverend Larry Hills to Zaire, where he first recognized the need for the device when he encountered survivors of polio and landmines who could not walk but could not use wheelchairs in their rural environments. Hills and his wife Laura spoke with Reverend Mel West about a modified wheelchair that might serve, hand-cranked with three wheels. During 1995, West involved product designer Earl Miner in producing a prototype built with an eye to sturdiness, simplicity and cost effectiveness. In 1996, four prototypes were put to the test in Zaire. Based on their performance, PETs went into production and shipped for distribution in Zaire.[2]
The following year, PET production began to expand into other countries, beginning with Mozambique. In 2000, to meet growing demand, West opened a facility in Columbia, Missouri, US, which serves to receive donated parts, to assemble PETs and ship them internationally. A second US facility was opened in Penney Farms, Florida (near Jacksonville, Florida), by the Hills that same year.[3] In 2003, a third facility was established in Luling, Texas.
In 2004, to help manage the growth and production of PETs, Pet International was incorporated, with a board of trustees and staff to help manage all issues related to assembling and distributing PETs. The cost of the components for a PET is roughly $300.[2]
PET carts have been shipped to Afghanistan,
Afghanistan, Argentina, Armenia, Angola, Bahamas, Bangladesh, Belize, Benin, Bolivia, Bosnia, Botswana, Brasil, Bulgaria, Burkina Faso, Burundi, Cambodia, Cameroon, Chad, China, Colombia, Costa Rica, Cuba, Democratic Republic of Congo, Democratic Republic of São Tomé and Príncipe, Djibouti, Dominican Republic, Ecuador, El Salvador, Eritrea, Ethiopia, Fiji, Gabon, Gambia, Gaza, Georgia, Ghana, Guatemala, Guinea, Guinea-Bissau, Haiti, Honduras, India, Indonesia, Iraq, Ivory Coast, Jamaica, Jordan, Kazakhstan, Kenya, Kosovo, Kyrgyzstan, Laos, Latvia, Liberia, Madagascar, Malawi, Mali, Mauritius, Mexico, Micronesia, Moldova, Mongolia, Morocco, Mozambique, Myanmar, Namibia, Nepal, Nicaragua, Niger, Nigeria, North Korea, Pakistan, Panama, Papua New Guinea, Paraguay, Peru, Philippines, Republic of Congo, Romania, Russia, Rwanda, Samoa, Senegal, Sierra Leone, Somalia, Sri Lanka, Republic of South Sudan, Swaziland, Syria, Tajikistan, Tanzania, Thailand, Togo, Tonga, Trinidad, Turkey, Uzbekistan, Uganda, Ukraine, Uruguay, Vanuatu, Vietnam, West Bank, Western Sahara, Zambia, and Zimbabwe.[4]