公开(公告)号：US4952350A

公开(公告)日：1990-08-28

申请号：US208912

申请日：1988-06-20

Applicant: Keith Duffy

Inventor： Keith Duffy

IPC: B29C41/06 ,  B29C41/22 ,  B29C41/36 ,  B29C44/04

CPC classification number: B29C41/36 ,  B29C41/22 ,  B29C44/043 ,  B29C2791/001 ,  B29C41/06 ,  B29K2105/04

Abstract: A method and apparatus for forming a product, and the product, such as a buoy with a plastic outer skin or shell and a plastic foam interior are provided. A first charge including, in one exemplary embodiment, a cross-linkable resin is added to a mold component, followed by a second charge, isolated from the first, and including in the exemplary embodiment expandable polystyrene beads. The apparatus is rotated about two mutually perpendicular axes. Initially, the cross-linkable composition is rotation molded against the walls of the mold to form the outer shell. Thereafter, the second charge of polystyrene beads is released within the mold, at a sufficient temperature to cause expansion of said beads against the shell.

Abstract translation: 提供了一种用于形成产品的方法和装置，以及产品，例如具有塑料外皮或外壳的浮标和塑料泡沫内部。 在一个示例性实施方案中，包括可交联树脂的第一电荷被加入到模具部件中，随后是从第一电荷隔离的第二电荷，并且在示例性实施方案中包括可发性聚苯乙烯珠。 该装置围绕两个相互垂直的轴线旋转。 最初，可交联组合物相对于模具的壁旋转模制以形成外壳。 此后，在足够的温度下，在模具内释放第二次聚苯乙烯珠的装料，以使所述珠粒膨胀抵靠壳体。

公开(公告)号：US4924796A

公开(公告)日：1990-05-15

申请号：US180339

申请日：1988-04-11

Applicant: Keith Duffy

Inventor： Keith Duffy

IPC: E02B3/26 ,  F16K15/20

CPC classification number: F16K15/202 ,  E02B3/26 ,  Y10T137/3771 ,  Y10T137/3786

Abstract: A replaceable inflation valve for a marine fender wherein, in one embodiment, the valve is slidably received in a valve seat formed in the fender, and wherein a bored collar is threadably received in the valve seat to hold a flexible member of the valve in place in the fender. The upper portion of the flexible member of the valve is received within the bore formed in the collar to provide access to the flexible member of the valve when the collar is in place. The flexible member of the valve comprises an elongated tubular member with one open end and one normally closed end. The normally closed end is openable by insertion of a needle valve through a slit therein. Upon removal of the needle valve, the slit closes on itself by reason of the inherent resiliency of the flexible member.

Abstract translation: 一种用于船用挡泥板的可替换充气阀，其中在一个实施例中，阀可滑动地容纳在形成在挡泥板中的阀座中，并且其中钻孔套环螺纹地容纳在阀座中以将阀的柔性构件保持在适当位置 在挡泥板上 阀的柔性构件的上部被容纳在形成在套环中的孔中，以在套环就位时提供对阀的柔性构件的通路。 阀的柔性构件包括具有一个开口端和一个常闭端的细长管状构件。 常闭端可以通过将针阀插入其中的缝隙而打开。 在去除针阀时，狭缝由于柔性构件的固有弹性而自身闭合。