Reenforced pressure surge cushioning means for a hydraulic system

Claim 1

IN A CUSHIONING MEANS FOR A HYDRAULIC SYSTEM, THE COMBINATION OF A CONTAINER HAVING CLOSED ENDS WITH AN APERTURE THROUGH EACH END, A TUBE-LIKE RESILIENT DIAPHRAGM ARRANGED WITHIN SAID CONTAINER WITH THE ENDS THEREOF ALIGNED WITH SAID OPERATIVELY CONNECTED AND SEALED TO SAID OPERTURES AS TO DEFINE A CLOSED CONDUIT FROM ONE APERTURE TO THE OTHER THROUGH THE CONTAINER, A HELICALLY WOUND COIL ARRANGED WITHIN SAID DIAPHRAGM AND SUPPORTED AT EACH END IN LIMITED LONGITUDINAL SLIDING ENGAGEMENT WITH SAID APERTURES, SAID COIL HAVING AN OUTER DIAMETER SLIGHTLY LESS THAN THE NORMAL INNER DIAMTER OF SAID DIAPHRAGM, AND SAID COIL HAVING A SUBSTANTIALLY SMOOTHLY CONTOURED OUTER SURFACE WITH SECTIONAL WIDTH OF THE CONVOLUTION FORMING MEMBER THEREOF BEING SUBSTANTIALLY GREATER THAN THE SPACING BETWEEN CONVOLUTIONS, A TUBULAR METAL SUPPORT POSITIONED WITHIN SAID COIL AND REENFORCING IT AGAINST RADIAL MOVEMENT, SAID METAL SUPPORT HAVING RELATIVELY LARGE APERTURES THEREIN SUBSTANTIALLY UNIFORMLY SPACED OVER ITS PERIPHERY FOR SUBSTANTIALLY THE LENGTH THEREOF, SAID METAL SUPPORT BEING OPERATIVELY ENGAGED WITH SAID CONTAINER ENDS AND BEING ADAPTED TO RECEIVE PRESSURE FLUID FROM AN ASSOCIATED FLUID PRESSURE SYSTEM, AND MEANS TO PASS INTO SAID CONTAINER BETWEEN THE OUTER SURFACE OF SAID DIAPHRAGM AND THE INNER SURFACE OF SAID CONTAINER.