turning now to the single figure a hand 10 is shown having the usual number of digits . the hand is hollow and is preferably formed of latex or other elastic material capable of returning to a specific set or configuration . for example , the hand shown will be biased or set in latex in the semi - curled or relaxed position . it is hollow so that a fluid may be contained therein and urged through the coupling member 12 , which acts as a stopper hydraulically sealing the hand ( pressure fit is sufficient ) and providing a coupling through the tube 14 to the bulb 16 . the hand may be manufactured with variable thickness digits such that as the pressure in the bulb is increased ( the bulb is depressed ) it causes a precessional movement of the digits . thus , for example , if one would want the index finger to advance first , the index finger would have a thinner latex , and so on , with respect to each digit and its relative time sequence , with the latex becoming thicker as each digit respectively advances . since there is no reason for the hand proper to expand ( i . e ., that portion to which the fingers are joined ) the greatest thickness of latex would be reserved for the hand itself . because fluids such as water and oils are hydraulic in nature , i . e ., instantly transmitting their pressure to all points due to the incompressibility of the fluid , it may be preferable to use air as a fluid which permits a pressure build up due to its compressibility . to permit the hand to walk along a surface , the latex is formed in such a manner at 18 as to provide an area in which a series of hair - like or cilia projections are formed having an orientation to permit forward movement and resist backward movement in the well - known fashion . alternatively , a variety of commercially available oriented materials may be affixed at the area 18 by contact glue . it may also be advisable to include the same type of material at the finger tips to aid oriented movement of the digits . as an alternative mode , a ratcheted or one - way wheel ( not shown ) may be appended at point 18 . it will be readily apparent to those skilled in the art that the hand set and the elasticity of the hand will permit reciprocal action with the bulb whereupon depression of the bulb will result in hand digit expansion which , upon release of the bulb , will permit the fluid to return to the bulb . although the present invention has been described in conjunction with a particular embodiment , it is to be understood that modifications and variations may be resorted to without departing from the spirit and scope of the invention and any such modifications and variations are within the scope of the invention and appended claims .
a simple fluid actuated vehicle is described in the shape of a hollow hand which , by remote bulb pressure , precesses along a given route by means of advancing digits .