|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||256/59 ; 248/251 ; 16/111R|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 31 인용 특허 : 0|
A rigid hand railing is disclosed having a plurality of compound indentations formed in the underside thereof to facilitate gripping thereof by a human hand. A method of manufacture of such a hand railing is also disclosed wherein a tool having a plurality of individually movable forming punches to be driven into pre-formed tooling stock is used to form the indentations in one side of the tubing stock. Each forming punch is provided with a tip portion having a compound shape formed from two perpendicular oriented and oppositely disposed arcuate shapes. T...
A hand railing comprising a rigid, elongated body portion terminating in first and second spaced apart ends defining a longitudinal length of said body portion, each said end being adapted for attachment to a mounting connector, said body portion further having a first surface and a circumferentially opposed second surface, said second surface having a plurality of longitudinally spaced indentations to facilitate gripping thereof, said indentations being generally uniformly formed and spaced along the major portion of said longitudinal length and termina...