Palatal expander

An orthodontic device for intraoral use comprising a body, means carried by said body for connecting said body to an anchor tooth on one side of a human palate, a block joined to said body for relative movement between the two, means carried by said block for connecting said block to an anchor tooth on the other side of a human palate, a bias spring acting between said body and block for producing relative movement between them, and removable means engaging both said body and said block for preventing said relative movement until said device has been installed in a human mouth, said bias spring being anchored to said body and acting against said block, said block carrying a pin, said spring bearing against said pin, said body carrying a post, said spring being wrapped around said post, said body including a pair of apertures, said block having a pair of guides slidable in said apertures.

An orthodontic device for intraoral use comprising a body, means carried by said body for connecting said body to an anchor tooth on one side of a human palate, a block joined to said body for relative movement between the two, means carried by said block for connecting said block to an anchor tooth on the other side of a human palate, a bias spring acting between said body and block for producing relative movement between them, and removable means engaging both said body and said block for preventing said relative movement until said device has been installed in a human mouth, said bias spring being anchored to said body and acting against said block, said block carrying a pin, said spring bearing against said pin, said body carrying a post, said spring being wrapped around said post, said block including a force receiver slidably coupled to said body, said pin being mounted on said force receiver.

An orthodontic device for intraoral use comprising a body, means carried by said body for connecting said body to an anchor tooth on one side of a human palate, a block joined to said body for relative movement between the two, means carried by said block for connecting said block to an anchor tooth on the other side of a human palate, a bias spring acting between said body and block for producing relative movement between them, and removable means engaging both said body and said block for preventing said relative movement until said device has been installed in a human mouth, said bias spring being anchored to said body and acting against said block, said block carrying a pin, said spring bearing against said pin, said body carrying a post, said spring being wrapped around said post, said means carried by said body and said block for connecting them to anchor teeth comprising at least one leg extending outwardly from each.

A palatal expander comprising a body, an outwardly extending leg carried by said body, a band for surrounding a molar on one side of a human palate connected to said leg, a block slidably joined to said body, an outwardly extending leg carried by said block, a second band for surrounding a molar on the other side of a human palate connected to the leg on said block, a spring attached to said body and bearing against said block to urge said body and block apart, and a keeper removably secured to said body and block for holding said body and block together until said expander is secured in a human mouth.