Patent ID: 8695285

Claim:
A shelter from an external environment comprising: an inner front module having a flat base and side walls which extend from the base and an airlock; an outer front module which is slidingly attached to the inner front module, the outer front module slides over the inner front module between a compact state, where the outer from module envelops the inner front module, and an extended state, where the inner front module extends from the outer front module and there is an airtight seal between the inner front module and the outer front module, the outer front module having a front attachment portion; an inner rear module; and an outer rear module which is slidingly attached to the inner rear module, the outer rear module slides over the inner rear module between a compact state where the outer rear module envelops the inner rear module, and an extended state where the inner rear module extends from the outer rear module and there is an airtight seal between the inner rear module and the outer rear module, the outer rear module having a rear attachment portion through which the outer rear module is attached to the front attachment portion of the outer front module, when the outer front module and the inner front module are in the extended state and the outer rear module and the inner rear module are in the extended state and the outer front module and outer rear module are attached, the outer front and rear modules and the inner front and rear modules form an airtight chamber in which users are protected from the external environment, each attachment portion is an external flange, and there is an external seal between each attachment portion that are attached together, when in the compact state, an inner front flange of the inner front module and the front attachment portion of the outer front module are flush and separate and apart from the inner and outer rear modules, and a bracket attached to the inner front module and outer front module when the inner and outer front modules are in the compact state to maintain the inner and outer front modules in the compact state.