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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||5/82R ; 5/116 ; 5/313R ; 16/326|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 17 인용 특허 : 0|
A portable, collapsible stretcher has frame poles, each of which have a medial joint which folds in one direction and two outer joints which fold in the opposite direction. A wedge is insertable into the medial joint to support the weight when the stretcher is extended. The outer joints have a locking mechanism which is operated by a linkage interconnecting the spreader bars and the folding legs. As the stretcher is extended, the outer joints are locked and the legs are unfolded from their normal position against the frame poles.
A collapsible, portable stretcher comprising: a pair of extendible frame poles; a flexible support sheet secured to said frame poles and suspended from said poles when they are extended to form a weight-bearing platform; each of said frame poles having a collapsible joint which is hinged to fold said frame poles; a wedge insertable into said joint when said frame pole is extended so that said hinge supports said weight; a spring biasing said wedge toward insertion into said joint when said frame pole is extended; a frame, said wedge being mounted on said...