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.
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.
January 15, 1988
Date of Patent:
April 18, 1989
Susan A. Christner, Elaine R. Janda, Mark Sidebottom
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.
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.
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.
November 2, 1987
Date of Patent:
March 7, 1989
The United States of America as represented by the Secretary of the Navy
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.
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.
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.
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.
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.
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.
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.
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.