| 摘要 |
<p>A pneumatic dispenser (2) is provided comprising a handle (14) with an actuation arrangement comprising two actuation surfaces (15,20), each for actuation by an operator holding the handle to selectively apply pressure to a respective one of the front (34) and rear (30) chambers on either side of a piston (28) coupled to a rod (10) for applying a dispensing force, thereby controlling advance and retreat of the rod (10). Further, a valve (36) is provided comprising a body and first and second moveable members. The valve can be arranged as a space saving five port valve for use in the disclosed dispenser. Additionally, a dispenser comprising a stock portion and a cylinder secured to the stock portion is disclosed. Pressure is supplied to the rear chamber of the cylinder from the stock portion through its front chamber and the piston moveable inside the cylinder.</p> |
