| 摘要 |
A pressure actuated force transmitting cylinder (10) includes a housing member having first and second elongated portions (14,20). An end cap (16) closes one end of the housing in a fluid tight manner. A connection is formed through such first portion for communicating fluid to such cylinder. A clutch (50) having a first clutch surface(39) is disposed on such housing and a piston-like member is disposed for reciprocal movement in such housing. A seal (60) disposed around a peripheral portion (16) of such piston-like member (43) provides a chamber (48) to receive such fluid being communicated to such cylinder therein and cause a linear displacement of such piston-like member. An elongated rod-like member (64), having a threaded portion (70), is connected to such piston-like member. A threaded nut member (72) is threadedly engaged with such threaded portion. A trigger mechanism (76) is disposed around a portion of such rod-like member adjacent such nut member. A disc-like member (82) is disposed around such trigger. A first race assembly (86) is abuttingly engaged with a flat surface (89) formed on such nut member and a second race (90) assembly is abuttingly engaged with another flat surface (94) formed on such nut member. Such first and second race assemblies permit rotation of such nut member on such threaded portion. Finally a first urging mechanism (100), in combination with fluid communicated to such cylinder, urges such second clutch surface away from such first clutch surface and a second urging mechanism (104) overcomes such first mechanism and urges such second clutch surface into engagement with such first clutch surface when pressure is absent in such cylinder. |
