161results about How to "Smooth inner surface" patented technology

A particle separation member (40) is provided for use with a cyclone separator (30). The particle separation member (40) divides the separator (30) into a cyclone chamber (46) and a particle receiving chamber (50). The cyclone chamber (46) and the particle receiving chamber (50) communicating via a plurality of apertures (52) in the particle separation member (40).

A drain panel assembly for the control of water leaking through a basement wall and/or entering a basement through the interface of a basement wall and a supporting footing. The assembly comprises a plastic drain panel having an upper panel section which extends vertically up from a lower skirt section. The upper panel section is positioned adjacent the basement wall and is closely-spaced therefrom by spacer means which are integral with the rear surface of the upper panel section to admit water running down the basement wall into the lower skirt section. The lower skirt section extends outwardly from the upper panel section and downwardly into contact with the supporting footing section to form a longitudinal water conduit which extends along the length of the footing and is open to the wall/footing interface to receive water therefrom. The water conduit enclosed by the skirt section is provided with a plurality of spaced openings along the footing for draining water therefrom outwardly over the footing into a drain tile.

The improved sheet and post container sidewall construction of the present invention includes a post with a novel cross section that increases the rigidity of the post at a minimum thickness. The cross section of the post includes a central wall connected to lateral wings that attach to the outer protective skin of a container. The central wall is connected to the lateral wings by a connecting segment that lies inside the lateral edges of the central wall, creating a channel between the central wall and the lateral wings. This channel enables the vertical edge of a liner to be held securely in place behind the central wall. The cross section of the structural post also provides increased rigidity because the thickness of the metal of the post is doubled along a significant portion of the lateral edges of the central wall. This configuration provides increased rigidity for the post and achieves the important objective of providing smooth container walls free of recesses, potential protrusions and snag points.

An improved micro slit viscometer includes a combined micrometer depth rectangular slit flow channel with monolithically integrated multiple pressure sensors in the flow channels and a pumping system that injects a test sample to the channel at a desired flow rate. Pressure sensing diaphragm of the monolithically integrated pressure sensors is smooth to minimize the flow disturbance thereby measuring accurate local pressures. With the measurement of the pressures at various locations of the channel the true viscosity of test sample can be calculated. The viscometer may consist of multiple flow channels and thus the true viscosity at multiple shear rates can be measured simultaneously for a given flow rate thereby obtaining a full viscosity curve as a function of shear rate of non-Newtonian liquids in a much faster manner. The viscometer needs only a miniscule amount of sample, which minimizes a waste of test material. The flow channels and the monolithically integrated pressure sensors are fabricated using microfabriaction processes on wafers and combined, which greatly reduce the production costs.

Provided are a tool and a method for injecting cement into the top of a horizontal well screen pipe without drilling and plugging. The tool for injecting the cement into the top of the horizontal well screen pipe without drilling and plugging is composed of a drilling-free and plugging-free tool, a bumping pressing rubber plug and a fishing tool. During construction, the drilling-free tool is lowered to the well along with a sleeve bunch. A well mouth is pressurized, a packer is sealed through expansion, pressurization is continued, a starting piston is opened, circulation is built, and well cementation is conducted normally. The bumping pressing rubber plug is added for bumping pressing at the later stage of the well cementation, the piston is closed simultaneously, a circulation channel is closed, and the well cementation is finished. After cement curing is finished, fishing is conducted through a small drill pipe connected with a fishing anchor, the small drill pipe and the fishing anchor are lifted after being in place, slips are opened, a fishing drum is blocked, an internal structure of the drilling-free tool is lifted together, and construction is finished. During a working process, a well completion accessory used in the process is not affected by drilling and grinding, service life is greatly prolonged, diameter in a well completion pipe column is large, the inner surface of the well completion pipe column is smooth, and smooth implementation of acid washing and gravel packing is guaranteed. Well completion working time of a single well is reduced by 24 hours on average, and well completion cost is greatly saved.

A pipe clamp assembly for joining pipe ends of the same or different diameters in a linear relationship for use in acid waste disposal systems. The clamp assembly comprises a flexible clamping band which surrounds the pipe ends to be joined, an elastomeric, circumferential, thin sealing gasket beneath the clamping band and, when joining pipe ends of differing diameters, an elastomeric, circumferential transition coupling within the sealing gasket, the transition coupling having grooves on the exterior surface to engage sealing beads on the interior surface of the sealing gasket, to form a sealing relationship between the exterior surface of the transition coupling and the interior surface of the sealing gasket, and circumferential sealing beads on the interior surface of the transition coupling, to form a sealing relationship with the exterior surface of the reduced diameter joint or pipe to be sealed, thereby providing a clamp assembly adapted to clamp together pipes or joint ends of different diameters. The sealing surfaces of the sealing gasket and transition coupling are layered with teflon to ease assembly, improve sealing, and increase reliability for use in acid waste disposal systems.

An upwardly acting sectional door (24), including a plurality of panels (40), body portions (50) of the panels constructed of a flexible polymeric material and having a front surface (55), a cladding (80) covering the front surface of the body portions and having hooks (83, 84) at the upper and lower edges thereof, a hinge member (51) at an edge of the body portion operatively engaging the hooks of adjacent of the panels to provide relative pivotal motion between adjacent panels. Another embodiment is an upwardly acting sectional pan door (224) including, a plurality of panels (240), facers (250) of the panels defining a front surface of the door and having cooperatively engaging couplers (270) at the upper and lower edges thereof; stiles (280) at the ends of the facers receiving and attached to the facers, and hinge assemblies (290) located at the end stiles to provide relative pivotal motion between the stiles and the couplers of adjacent panels.

An improved molded plastic elbow and a related mold assembly and manufacturing method are provided, wherein the elbow defines an internal flow path having a smoothly radiused inside turn. The elbow is formed by injecting plastic material into a tubular mold cavity formed by closed mold members in cooperation with a pair of slidably retractable core units of circular cross section and having distal ends in mating, angularly set end-to-end contact to form the internal flow path having a turn formed along the length thereof. Each core unit comprises an outer core pin to form an outer portion of the flow path and including a ramped track for slide-fit mounting of an inner slide segment which forms an inner portion of the flow path and further includes a curved inside edge to form a portion of the smoothly radiused inside turn. Initial retraction of each outer core pin from the mold cavity permits relative advancement of the inner slide segment along the ramped track toward a centerline of the flow path, sufficiently for the curved inside edge of the inner slide segment to clear the radiused inside turn of the molded elbow and thereby enable interference-free linear withdrawal of the core unit from the molded plastic part.

A showerhead with oscillating water includes an inlet passage connected to an outlet passage and an oscillator assembled inside the shower head. The oscillator has a main body with an inlet, a ball shaped oscillating cavity, and an outlet. The ratio of the inner diameter of the inlet, the inner diameter of the oscillating cavity and the minimum inner diameter of the outlet is 1:2.5-5:1.1-1.35. The water of the inlet flowing into the oscillating cavity divides into a main waterway and a feedback waterway, water of the main waterway flowing out of the outlet through the oscillating cavity, water of the feedback waterway flows back to the inlet through the cavity wall of the oscillating cavity, water of the main waterway flows out of the outlet in a circumferential cyclical shaking way under the compact of the water of the feedback waterway.

The invention relates to the technical field of hand protection articles, in particular to medical gloves and a manufacturing method thereof. The gloves are made from the following raw materials in percentage by mass: 36 percent of EVA, 20 percent of LLDPE, 43 percent of LDPE and 1 percent of an opening agent. The gloves contain no protein, thereby effectively avoiding skin allergy caused by powder; the surfaces of the gloves can be provided with textures, thereby preventing an implement from falling off when the gloves are used; the gloves can be worn on the left and right hands randomly; thegloves are flexibly, conveniently and disposably used and can effectively prevent various infections; the gloves have a high tensile strength, thereby avoiding being torn when worn; the gloves have high shock resistance and tear resistance; the inner surfaces of the gloves are smooth so that the gloves are conveniently worn; and the gloves have the advantages of low production cost, good performances, accessibility and relatively great market competitiveness. The gloves are applicable to medical treatment, medicament, health protection, hairdressing, beautifying and food processing, and otheroperation industries.

A small diameter metal tube whose inner surface is smooth and its production method are provided. The metal tube has an inner diameter of up to 1.0 mm and its inner surface has a maximum height difference (Rf) in the surface roughness of up to 3 mum.

A snap fitting for use in plumbing is provided. The snap fitting includes a main body formed of plastic and shaped to extend partially around a cylindrical pipe to snap over the pipe and an inset for extending from an interior side of the main body into a hole in the cylindrical pipe.

The invention provides a method for easily producing a medical glass container with slightly eluted alkaline constituents, comprising the following steps: processing a glass tube 65 into a glass tube shape with a bottom 73 and an opening 71 to provide a narrowneck bottle 70; spraying the flame 23 of a burner 30 into the inner space 72 of the narrowneck bottle 70 to apply the flame 23 on the inner circle surface 75. Thus the alkaline constituents adhered or kept on the inner circle surface 75 of the narrowneck bottle 70 is blown away. Thus the narrowneck bottle with slightly eluted alkaline constituents is produced at the low cost.

An injection needle comprises a base having a predetermined outer diameter and a predetermined inner diameter, a narrowed portion positioned in the front side of the base with an outer diameter and an inner diameter narrowed smaller than the outer diameter and the inner diameter of the base, respectively, and a narrowed tapered portion interposed between the base and the narrowed portion with an outer diameter gradually decreasing from the base toward the narrowed portion, wherein the narrowed portion is formed by inserting a core with an outer diameter corresponding to the inner diameter of the narrowed portion, into a metal needle pipe with an outer diameter consistent with the outer diameter of the base, to narrow the outer diameter by plastic deformation, and then by removing the core.

The invention relates to a fiber strengthen plastic cylinder with inner screw strength bar. Wherein, the liner layer (1) has at least one screw groove; the strength bar (3) is fixed inside the groove whose length is at least 1/3 of the cylinder length; the outer layer (2) of cylinder is fixed on the outer surface of liner layer (1) and the strength bar (3). The producing method comprises: treating the outer surface of mould; laying and coiling the liner layer (1), cylinder outer layer (2) and the strength bar (3) to be put into solidify furnace to be molded; then treating the outer surface. The invention has short producing time, high efficiency and simple process. And the inventive cylinder has high strength, smooth inner surface without crack, etc.

The invention provides a collecting system of core gas in a natural gas hydrate drilling field. The collecting system comprises an air collector, a water bath thermotank, a vibration table and a gas collecting bottle, wherein the water bath thermotank is arranged on the vibration table; the air collector comprises a tank body and a tank body cover, wherein the tank body and the tank body cover are separable, and the tank boy is in seal connection with the tank body cover; and when the collecting system is adopted to collect the core gas, the tank body filled with a core sample is in seal connection with the tank body cover when the water bath thermotank is positioned in a constant temperature saturated salt water environment, and the gas collecting bottle is connected with a gas collecting outlet of the tank body cover under the constant temperature saturated salt water environment. The collecting system provided by the invention has the advantages that the processes of packaging the aquo-complex core sample, releasing the gas, collecting the gas, collecting gas in an oscillation manner and sealing and storing the gas are finished once, a series of pilot processes are simplified, and the work efficiency of gas collection is greatly improved.

A bulkhead door for watertight closing of a bulkhead opening of a naval vessel, comprising a composite outer shell and inner shell, a chamber therebetween, and a channel along the door margin for retaining a gasket without adhesive. The chamber may be filled with a material such as a rigid foam to increase door strength and rigidity. The outer shell includes hinge blades spaced apart by a standard distance and spaced equally from ends of the door, so that each door may be used for either a right-hand or left-hand bulkhead hinge pin orientation. Metal strikers are bonded to the outer surface of the door for engaging closure dogs in use. A door may be provided without any strikers, and the strikers then bonded to the door at appropriate locations during installation of a door to a specific bulkhead opening location.

A spiral brace has an inner surface that corresponds to a digital representation of an injured limb. The spiral brace can wrap around a length of the limb in a helical manner. The body of the spiral brace may be a single piece structure that is fenestrated to provide air circulation to the injured limb.

A roof structure for a trailer includes a roof sheet attached to top rails of the trailer, and a plurality of spaced apart roof bows attached to the roof sheet. The roof bows provide structural support to the roof structure and are mounted on the exterior of the trailer, such that the roof bows are exposed to the environment. The roof sheet faces the interior of the trailer and provides a smooth, snag-free interior surface on the inside of the trailer.

The invention provides a cooking utensil. The cooking utensil includes a shell which forms a cavity, a jet hole plate which is positioned in the shell and divides the cavity into an air channel and acooking cavity, an inner plate which is arranged on the side, facing the cooking cavity, of the jet hole plate in a covering mode and provided with multiple through holes, a heating element positionedin the air channel, and a draught fan assembly which includes a driving device and first fan blades, wherein the jet hole plate is provided with multiple jet nozzles, and the jet nozzles are positioned on the side, facing the cooking cavity, of the jet hole plate and communicated with the air channel and the cooking cavity; the through holes are in one-to-one correspondence with the jet nozzles and are communicated with the jet nozzles; the first fan blades are positioned in the air channel, and the driving device drives the first fan blades to rotate to drive airflow to be jetted into the cooking cavity through the jet nozzles. The cooking utensil is provided with a cavity structure heated through air-jet impingement, by arranging the inner plate with the through holes on the side, facing the cooking cavity, of the jet hole plate, the inner wall face of the cooking cavity is flat and smooth, the cleaning difficulty is reduced, and meanwhile the appearance of the cooking utensil is beautiful.