Patents by Inventor Robert P. Martins

Robert P. Martins has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5286081
    Abstract: Cab panel structures and methods for their assembly on an overhead guard of a land vehicle. A metal roof panel can be used alone or with a metal frame windshield panel for a partial enclosure. The metal roof and windshield panels can be used with complimentary fabric panels that afford a full enclosure or with complimentary steel panels that afford a full enclosure of high durability. The metal panels are attached to the overhead guard posts in a unique clamp-on method that avoids the need for direct fastening of the guard and, accordingly, allows rapid installation.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: February 15, 1994
    Assignee: Martin Sheet Metal, Inc.
    Inventor: Robert P. Martin, Jr.
  • Patent number: 4702516
    Abstract: A construction for a cab face for a vehicle or the like in which a plurality of separate plates are assembled in a pattern that provides a rectangular window aperture and which allows substantially any cab face width to be formed from proper selection of plate sizes which vary incrementally.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: October 27, 1987
    Inventor: Robert P. Martin, Jr.
  • Patent number: 4688846
    Abstract: A fabric cab for a work vehicle affording excellent visibility through extensive window areas, and high functional utilization of materials without significant material waste in its fabrication. Faces of the cab are fabricated by joining separate fabric strips together and to window elements at the corners and margins of the cab. Side faces of the cab include flexible roll up doors removably attached to the cab for repair or replacement. Side sections of the cab are fitted with fasteners that allow the cab to be knocked down for storage and shipment by folding it on regular corners.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: August 25, 1987
    Inventor: Robert P. Martin, Jr.
  • Patent number: 4675933
    Abstract: A windshield wiper drive system for an industrial lift truck cab which affords a high degree of forward visibility, ease of construction and assembly, and simple operation. The system includes a centrally mounted pivot shaft coupled by a connecting link to a laterally offset gear motor drive. The gear motor drive is a right-angle unit that is mounted in a manner which substantially eliminates obstruction of the operator's view as bounded by the front of the cab structure.
    Type: Grant
    Filed: September 19, 1985
    Date of Patent: June 30, 1987
    Inventor: Robert P. Martin, Jr.
  • Patent number: 4619479
    Abstract: A fully enclosed protective cab for an industrial lift truck affording a high degree of visibility and including a rear face with a retractable panel section adapted to permit engine cover movement for access to the truck engine. The retractable rear panel section is arranged to slide in its plane between extended and retracted operational positions, thereby taking up minimum space, and is transparent to afford a clear rearward view in both of its operational positions.
    Type: Grant
    Filed: March 14, 1985
    Date of Patent: October 28, 1986
    Inventor: Robert P. Martin, Jr.
  • Patent number: 4574727
    Abstract: A user installed bookmark formed as an assembly of a flat anchor and an elongate flexible marker. The anchor is provided with a pressure sensitive adhesive which serves at an integral tail portion to retain the marker and, when exposed by removing a backing layer, serves to fix the assembly to a book. The release backing includes a convenient pull tab donated from a tail portion of an anchor when these elements are blanked from sheet stock.
    Type: Grant
    Filed: August 11, 1983
    Date of Patent: March 11, 1986
    Inventor: Robert P. Martin, Jr.
  • Patent number: 4392669
    Abstract: A cab for an electric lift truck having a displaceable steering wheel for battery access. A front panel of the cab is hinged in a manner which allows it to temporarily swing out of the path of the steering wheel while avoiding interference with the lift mast. A windshield wiper unit carried on a fixed area of the cab is automatically deflected by movement of the front panel. Various doors and panels of the cab are lap mounted over vertical corner post elements to permit limited adjustment of their relative spacing for proper fitting with a production lift truck.
    Type: Grant
    Filed: October 24, 1980
    Date of Patent: July 12, 1983
    Inventor: Robert P. Martin, Jr.
  • Patent number: 4379418
    Abstract: A safety boot assembly for use with a press brake operated C-frame punch or the like tool which fits between the ram of the press and the upper arm of the C-frame to prevent a human limb from being inadvertently placed in any gap between the ram and C-frame. The disclosed assembly includes a corrugated boot and end fittings to attach its ends to the ram and C-frame.
    Type: Grant
    Filed: February 3, 1981
    Date of Patent: April 12, 1983
    Inventor: Robert P. Martin, Jr.
  • Patent number: 4348834
    Abstract: A method and device for eradicating vine-type vegetation by which a substantially closed container of liquid herbicide receives a stem of an unwanted plant and retains it immersed in the liquid, causing the plant to ultimately absorb a lethal dose of such herbicide.
    Type: Grant
    Filed: February 9, 1981
    Date of Patent: September 14, 1982
    Inventor: Robert P. Martin, Jr.
  • Patent number: 4221274
    Abstract: A rear engine lift truck is provided with an operator cab having a back wall portion fixed to a hinged engine hood for concurrent movement therewith apart from the remaining cab structure. The hood is hinge-mounted at its forward end within the cab interior wherein upward movement of the hood provides unobstructed rear access to the engine compartment, the movable back wall portion swinging into the cab interior.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: September 9, 1980
    Inventor: Robert P. Martin, Jr.
  • Patent number: 4205874
    Abstract: An overhead guard for a lift truck or the like being adjustable in height between an extended position for maximum operator convenience in normal use and a retracted position for use in areas of restricted overhead clearance. Full protection from falling overhead objects is afforded by the guard in both of its positions and counterbalancing means is provided to facilitate manual adjustment of the guard between its positions.
    Type: Grant
    Filed: January 13, 1978
    Date of Patent: June 3, 1980
    Inventor: Robert P. Martin
  • Patent number: 4133574
    Abstract: A lift truck cab having thermally insulated walls and an electrically energized heater system making it particularly suited for use with electric lift trucks in closed cold environments. The heater system is spaced throughout the cab to surround the operator and provide a uniform distribution of heat. Double hinged doors forming the sides of the cab permit passage of the operator when partially opened and complete access to the vehicle when fully opened.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: January 9, 1979
    Inventor: Robert P. Martin
  • Patent number: 4099590
    Abstract: An engine cover in an industrial lift truck forming a sound barrier between the engine and operator's station to reduce engine-related noise reaching the operator's station to acceptable levels particularly where the operator's station and engine cover are enclosed by a cab. The engine cover is provided with a double rigid wall construction comprised of an outer shell and an inner liner complementary in configuration to the shell and nested within it. The shell and liner components are mutually supported and spaced a predetermined distance by continuous support means generally along their peripheries and are free of mutual support in their central areas.
    Type: Grant
    Filed: February 17, 1977
    Date of Patent: July 11, 1978
    Inventor: Robert P. Martin, Sr.
  • Patent number: 4079985
    Abstract: A quick-mounting combined overhead guard and weatherproof cab for the body of an industrial lift truck comprises a tubular frame with four roof members and four upright corner members. The roof is closed with steel plating. The front and rear upright corner members at each side form jamb members for cab doors which close against the exterior sides of the frame members. The front and rear faces of the cab and the door bottoms are provided with sealing means cooperative with the truck body. A roof window is provided with an array of cut-out window lights in the steel plating, the spaces between the lights comprising bars that remain integral with the plating. The window is transparently covered by openable cover means.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: March 21, 1978
    Inventor: Robert P. Martin
  • Patent number: 4063442
    Abstract: A machine and method for shaping a workpiece into a cylindrical tube includes a mandrel, a forming roll, a guide roll, and a continuous forming belt extending partially around the mandrel and partially around the forming roll and guide roll. The workpiece is inserted between the belt and the mandrel at an entry opening. An actuator device causes the mandrel to simultaneously tighten the belt and squeeze the workpiece between the mandrel and the forming roll during the forming operation.
    Type: Grant
    Filed: November 29, 1976
    Date of Patent: December 20, 1977
    Inventor: Robert P. Martin, Sr.
  • Patent number: D249254
    Type: Grant
    Filed: February 17, 1977
    Date of Patent: September 5, 1978
    Inventor: Robert P. Martin, Sr.
  • Patent number: D267486
    Type: Grant
    Filed: August 22, 1980
    Date of Patent: January 4, 1983
    Inventor: Robert P. Martin, Jr.
  • Patent number: D274276
    Type: Grant
    Filed: September 18, 1981
    Date of Patent: June 12, 1984
    Inventor: Robert P. Martin, Jr.
  • Patent number: D279660
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: July 16, 1985
    Inventor: Robert P. Martin, Jr.
  • Patent number: D348553
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: July 5, 1994
    Assignee: Martin Sheet Metal, Inc.
    Inventor: Robert P. Martin, Jr.