Patents Examined by Petar Arsenovic
  • Patent number: 4872690
    Abstract: A seal cavity protector for use with rotary fluid equipment having a seal cavity, defined by a shaft, a shaft housing and a seal engaging the shaft, includes an annular cup-shaped element for securement to the housing at the entrance thereto. The shaft can pass through the element. A plurality of circumferentially spaced apart vent passages extend through the wall of the element. As the equipment rotates fluid passing by the vent passages creates a low pressure area outside the seal cavity whereby fluid contained within, or flowing into, the cavity is drawn out through the vent passages. Any contaminants contained in the cavity or entering with the fluid are removed from the cavity with the exiting fluid. This reduces pressure within the cavity and reduces greatly the chance of damage to the shaft and/or seal by the contaminants.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: October 10, 1989
    Assignee: Enviroseal Engineering Products Ltd.
    Inventor: Joseph R. Dunford
  • Patent number: 4822054
    Abstract: A vapor/fuel seal for a fuel tank filler tube. The vapor/fuel seal includes an expansible seal member having inlet and outlet ends. The inlet end is sealingly mountable on the inlet end of a vehicle filler tube. The outlet end is normally closed. However, the outlet end is expansible to receive the end of a fuel dispensing nozzle therethrough. Intermediate between the inlet and outlet ends of the seal member is a sleeve member which defines an expansible fluid flow body portion. The sleeve member is expansible to receive a fluid dispensing nozzle and yet remain in sealing contact with the periphery of the nozzle. The vapor/fuel seal has a biasing member monted at the inlet end and extending into the fluid flow body portion to maintain the expansible seal member in position during insertion and removal of the fluid dispensing nozzle. The biasing member has at least two prong members which extend within the fluid flow passage and maintain the sleeve member in position during insertion and retraction.
    Type: Grant
    Filed: January 15, 1988
    Date of Patent: April 18, 1989
    Assignee: Janchris Corporation
    Inventors: Susan A. Christner, Elaine R. Janda, Mark Sidebottom
  • Patent number: 4821593
    Abstract: A shift selection indicator assembly for motor vehicles which includes a cable sheath with a cable core passing therethrough having one end coupled to a transmission shifter and another end coupled to a display mechanism. An adjustment assembly is positioned at one end or in-line of the cable sheath and includes a threaded shaft and an adjustment thumbwheel for changing the effective length of the cable sheath and therefore changing the indicated shift position. A detent is provided for maintaining a set adjusted position.
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: April 18, 1989
    Assignee: May & Scofield, Inc.
    Inventor: Lawrence P. Kobylarz
  • Patent number: 4819577
    Abstract: An inexpensive fluid flow indicator capable of use in low flow conditions in a variety of environments, including but not limited to laboratory, industry, and medical applications. Flows are visually indicated by the rotation of balls loosely retained in a longitudinal passageway of the indicator's transparent housing by a flow guide and an outlet port. The flow guide imparts a circumferential or transverse direction to the axial flow of the fluid which causes the balls to revolve about the center line of the indicator.
    Type: Grant
    Filed: May 20, 1988
    Date of Patent: April 11, 1989
    Assignee: Flow-Rite Controls, Ltd.
    Inventor: Daniel N. Campau
  • Patent number: 4809638
    Abstract: A method of and an apparatus for providing an all weather day and night ltion marker on the surface of a body of water enable optional visual, radar and IR detection to ensure the timely rescue of a disaster victim. A cohesive surfactant is mixed with an evaporation reducer and contained in a packet that allows the dispersing of a film made up of the two compounds after they are placed in the water. The film creates a surface that has a slick appearance with respect to the surrounding water, that has a reduced radar backscatter with respect to the surrounding water and which, as a result of reduced evaporative cooling, results in a local increase in the surface temperature with respect to the surrounding water to assure the visual, radar and IR detection.
    Type: Grant
    Filed: November 2, 1987
    Date of Patent: March 7, 1989
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert R. Kolesar, J. Terry Richard
  • Patent number: 4809991
    Abstract: A piston seal includes a pair of annular metal sealing rings mounted in grooves in the cylindrical surface of a piston with one ring being located adjacent each of the opposed end faces of the piston. An annular sealing member of resilient material is mounted on the piston in an annular goove located between the metal rings.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: March 7, 1989
    Inventor: John A. Blatt
  • Patent number: 4802679
    Abstract: A bell seal assembly for the nozzle chamber unit of an elastic fluid turbine, such as the steam turbine used to drive electrical utility generators. The bell seal assembly includes a bell seal unit and a retaining nut unit; the seal skirt depends from a mounting flange. The outer skirt surface is subdivided into an upper skirt surface, an intermediate portion and a lower skirt margin. The intermediate portion is the primary skirt seal region, and the lower skirt margin is tapered inwardly toward the skirt end surface. The lower skirt margin includes a plurality of spaced apart, circumferentially extending grooves one of which terminates adjacent the lower edge of a sealing land on the primary seal portion of the skirt.
    Type: Grant
    Filed: December 31, 1987
    Date of Patent: February 7, 1989
    Assignee: Westinghouse Electric Corp.
    Inventors: Shun Chen, Chin-Sheng Lee
  • Patent number: 4799690
    Abstract: A sanitary seal assembly useful for sealing a rotary through-wall shaft in both static and rotary modes, the invention provides a sealing structure capable of being fitted to external wall surfaces of a cooking kettle or the like for rapid manual assembly and disassembly for cleaning according to sanitation standards. The sealing assembly includes a seal retainer having static and rotary sealing elements, the seal retainer being held in place by compression forces exerted by a pivotable seal compression element. The seal compression element is pivotable at one end to release pressure on the seal retainer to allow removal of the retainer for cleaning of the seal assembly.
    Type: Grant
    Filed: March 24, 1988
    Date of Patent: January 24, 1989
    Assignee: J. C. Pardo and Sons
    Inventor: Valentino Gabriele
  • Patent number: 4798161
    Abstract: A display device comprising: a control member (10); a carriage (50) displaced along a predetermined path (A) by the control member (10); and a plurality of flaps (100) distributed at a constant pitch (p) along the path (A) of the carriage, with each flap (100) being equipped with a cam (120) suitable for engaging the carriage (50) in order to displace the associated flap (100) from a rest position to an operated position. According to the invention said cams (120) are positioned in predetermined different positions relative to the corresponding flaps (100) in order to define a predetermined relationship between carriage displacement and the successive instants at which the flaps (100) are moved.
    Type: Grant
    Filed: May 10, 1988
    Date of Patent: January 17, 1989
    Assignee: Jaeger
    Inventor: Andre Lazareff
  • Patent number: 4796895
    Abstract: A seal assembly for use in the high pressure oil supply inlet to an automatic transmission piston includes an outer sleeve and a spring loaded inner sleeve with a lip seal and the top and a compression seal at the bottom. The seal assembly self adjusts for tolerance stack up, and also increases its sealing pressure with the introduction of high pressure oil.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: January 10, 1989
    Assignee: General Motors Corporation
    Inventor: Robert L. Perkins
  • Patent number: 4796896
    Abstract: A two-stage elastomeric refrigerant seal has a seal body with a primary seal section adapted for low compression and a secondary seal section adapted for high compression. The seal body is secured to a retainer in an arrangement such that the secondary seal provides pressure assisted sealing on the seal body from the sealed gas acting on the primary seal and in addition provides physical shielding of the primary seal from the refrigerant and any contaminants therein.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: January 10, 1989
    Assignee: General Motors Corporation
    Inventor: Russell C. Anderson, Jr.
  • Patent number: 4795173
    Abstract: A double O-ring sealing arrangement for a pressure responsive device wherein a storage-buffer chamber is provided between the double O-rings and is kept at a high pressure even when the actuating pressure for the pressure responsive device is dropped below atmosphere so as to provide for an as effective sealing of an actuating chamber of the pressure responsive device from the surrounding atmosphere.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: January 3, 1989
    Inventor: Lyle E. Osborne
  • Patent number: 4788929
    Abstract: A fluid indicator for viewing the condition of refrigerant flowing therethrough includes a brass body (12) having a cylindrical extending portion (26). The cylindrical extending portion includes a recess (30) bounded by a deflectable wall (28). An aperture (14) which includes a transparent glass pane (36) surrounded by a steel ring (38) is mounted in the recess and fixed therein by braze material. Tubes (16, 18) are brazeable into coupling portions (20, 22) of the body, and the fluid tight character of the indicator is unaffected despite failure to use a chill block, wet rag or other cooling device during the brazing operations.
    Type: Grant
    Filed: June 14, 1988
    Date of Patent: December 6, 1988
    Assignee: Parker-Hannifin Corporation
    Inventors: Walter O. Krause, Peter J. Davis