Patents Assigned to Rubber Millers, Inc.
  • Patent number: 5127354
    Abstract: An energy absorbing system utilizes a buckling design to absorb a large amount of energy for a given compressive force. This system includes a stack of elastic, thin-walled barrels which are generally aligned along a common longitudinal axis. Between each barrel, an annular plate is provided. Deformation limiters can be mounted on these plates to limit the amount of buckling for each barrel. The enerby absorbing system can be attached to a quay in order to fender a ship.
    Type: Grant
    Filed: March 6, 1991
    Date of Patent: July 7, 1992
    Assignees: University of Maryland at College Park, Rubber Millers, Inc.
    Inventors: Edward B. Magrab, Boris L. Krayterman, deceased, John T. Day, Eugene F. Kane
  • Patent number: 4893576
    Abstract: A fender for marine use having an outer flexible elastomeric shell and containing therein a solid foam bun, and its method of construction is described. The method includes forming the shell in two halves, inserting the solid foam bun into the two halves, and thereafter molding the two halves into an integral unit. The marine fender has excellent flexibility and structural integrity.
    Type: Grant
    Filed: December 12, 1986
    Date of Patent: January 16, 1990
    Assignee: Rubber Millers, Inc.
    Inventors: John T. Day, Robert O. Herder, Robert B. McNatt
  • Patent number: 4628850
    Abstract: A fender for marine use having an outer flexible elastomeric shell and containing therein a solid foam bun, and its method of construction is described. The method includes forming the shell in two halves, inserting the solid foam bun into the two halves, and thereafter molding the two halves into an integral unit. The marine fender has excellent flexibility and structural integrity.
    Type: Grant
    Filed: February 17, 1983
    Date of Patent: December 16, 1986
    Assignee: Rubber Millers, Inc.
    Inventors: John T. Day, Robert O. Herder, Robert B. McNatt
  • Patent number: 4521306
    Abstract: A bar screen/conveyor system for collecting debris or the like in a stream of liquid, including collector rakes for attachment to the conveyor which are made of a tough, abrasion-resistant and corrosion-resistant elastomer is described. The preferred elastomers for use in rake fabrication are polyurethane elastomers. The conveyor systems which include the elastomeric rakes have greater durability and use life without problems than the heretofore conveyor systems utilizing metal rakes.
    Type: Grant
    Filed: December 12, 1983
    Date of Patent: June 4, 1985
    Assignee: Rubber Millers, Inc.
    Inventor: John T. Day
  • Patent number: 4428568
    Abstract: The disclosed invention relates to a force-absorbing member which is formed of a resilient plastic material having a relatively high tensile strength mounted in a suitable restraining member. The force-absorbing member includes an annular mounting flange which is of sufficient size and the material of the force-absorbing member of sufficient strength to permit the force-absorbing member to readily deflect to one side of its axis during use, and the mounting of the flange is such that the flange will not rupture or pull through the member restraining it against movement. The force-absorbing member may be utilized, inter alia, as a bumper per se, as a support for a bumper, as a combined boat rub-rail and line-attaching member, or as part of a shock-absorbing unit of a tow unit, such as a tow chain.
    Type: Grant
    Filed: July 8, 1981
    Date of Patent: January 31, 1984
    Assignee: Rubber Millers, Inc.
    Inventors: Robert B. McNatt, John T. Day
  • Patent number: 4424938
    Abstract: The invention comprises resilient lining panels formed preferably from polyurethane of certain specified hardness and provided with leading and trailing sides between which a material-engaging surface is formed which has a smoothly curved wave configuration cresting nearer the trailing than the leading side, the leading side terminating in a relatively thin wedge-shaped flange which is overlaid with a thicker clamping flange on the trailing side, and a metallic clamping member is positioned within the panels, extending between opposite ends thereof, and having flat ribs extending laterally and oppositely from a channel arrangement into at least the overlapping flanges of the trailing side of the panel to effect firm clamping against the flange on the leading side of each panel.
    Type: Grant
    Filed: December 11, 1981
    Date of Patent: January 10, 1984
    Assignee: Rubber Millers Inc.
    Inventor: John T. Day
  • Patent number: 4209089
    Abstract: An improved composite feeder belt for use in transporting and handling minerals or the like wherein the belt is comprised of a low modulus, abrasion resistant urethane containing a reinforcement of free floating, spaced encapsulated yarns. The yarns are woven in the form of a scrim and are treated to prevent penetration of the liquid urethane into the filament bundles during manufacture of the belt and also to inhibit adhesion of the urethane to the yarns.
    Type: Grant
    Filed: October 6, 1978
    Date of Patent: June 24, 1980
    Assignees: Rubber Millers, Inc., Koppers Company, Inc.
    Inventor: John T. Day
  • Patent number: 4136632
    Abstract: A fender for marine use is described having an outer flexible shell forming a chamber, compressible buoyant material within the chamber and a mooring fitting connected to the shell to secure the fender. The shell is composed of a single piece of homogeneous elastomeric material, having a thickened annularly shaped lip extending around an orifice providing access to the chamber for filling. The mooring fitting is formed with a cavity and the lip of the shell is captured within this cavity to secure the fitting to the shell, so that the shell permits stretching of the fender when it is pinned between two objects while a tensile force is applied to said mooring fitting. The mooring fitting captures the lip without compressing it, so that the fitting may swivel with respect to the shell while still securing the shell from separating from said fitting.
    Type: Grant
    Filed: September 16, 1977
    Date of Patent: January 30, 1979
    Assignees: Ocean Systems, Inc., Rubber Millers, Inc.
    Inventors: John T. Day, Robert O. Herder, Thomas N. Blockwick, Dan B. Brockman, John F. Sharpe, Richard W. Hildebrand