Abstract: A toilet flush mechanism comprising a tank holding a water supply and having a valve for flushing a toilet bowl a handle for opening the valve to the toilet bowl for initiating the flushing actions, a water supply entering the tank near the bottom of said tank, for replacing the water in the tank including a flexible tube connected to the supply the extending into the tank, said tube having a first curved portion for carrying the water into the tank, a second bendable portion for controlling the flow of water into the tank and a third extended portion for supplying the flow of water into the tank, and a blout and rod responsive to the water level in the tank for flexing said tube to control water flow into the tank which rises and falls with the water supply level, the rod extending along and being independent of the third portion of said tube, the rod being connected at the other end to the second portion of the tube adjacent the bendable portion thereof for bending said tube in response to movement of said

Abstract: A pipe plug which cannot be removed from a pipe with the same key with which it is installed, the pipe plug having a body with a plurality of arcuate grooves having inclined arcuate ramps leading from its face into its body and terminating at shoulders for abutting engagement with first key having pins which bear against the shoulders to tighten the plug in the pipe but which cannot loosen the plug because the pins will ride up the ramps and cam out of engagement with the plug, and a second key for removing the plug including a ridge on the second key for mating with a complementary curvilinear groove in the plug. A counterbore is provided in the face of the plug to receive portions of the ridge which are of substantially the same diameter as the counterbore to thereby center the second key with respect to the plug and guide it while the second key is rotated until the ridge thereon falls into the groove to effect mating engagement therewith.

Abstract: An orifice plate holder for removeable insertion between juxtaposed flanges, the holder being formed of a plate body portion of rigid material having an opening therethrough, first and second elastomeric washer members having an outer diameter greater than the plate body portion opening and sealed to the opposed sides of the plate body portion, one of the washers being sealed only approximately one-half of its circumference so that the unsealed portion is resiliently deflectable away from the body portion, and an orifice plate insert of rigid material and of outer diameter less than that of the opening through the plate body portion, the orifice plate insert being insertable between the elastomeric washer members so that the assembly may be removeably positioned between adjacent flanges and tightened in position, the orifice plate insert being thereby easily replaceable as it wears or when it is desired to change to a different size orifice.

Abstract: A universal drain trap and separator having a hand removable bowl with an open top and a center post which extends upwardly through a lid member which closes the bowl in a sealed relation; inlet and outlet conduits attached to the lid and fastening means including a handle which passes up through the center post of the bowl for attachment to the lid and a peripheral lip around the top of the bowl extending upwardly sufficiently to contain the fluid in the conduits and trap when the bowl is removed therefrom.

Abstract: This invention relates to a plastic pipe. The wall thickness of this kind of pipes is very small and, consequently, the impact strength is poor. The impact strength of pipes made of polyvinyl chloride can be improved by adding an admixture to the raw material, which, however, increases costs. According to the invention the impact strength can be improved by a ring-shaped elevation formed at the foot of the ribs on both sides thereof, which elevation joins the side wall of the rib over a sharp transitional juncture.

Abstract: A flexible tube for use in an endoscope comprises a flexible basic tubular core structure including an outer meshwork tube, and a thermoplastic synthetic resin tube bonded to the outer meshwork tube of the tubular core structure in a manner such that the resin tube maintains an inherent compressive pre-stress in the finished flexible tube. An endoscope tube having flexibility which varies in a step-wise manner from one end of the tube to the other is obtained by integrally bonding two or more thermoplastic synthetic resin tube sections formed of respective resin materials having different hardnesses to the outer surface of the tubular core structure to form a coating layer in an analogous manner.

Abstract: An improved method and apparatus for automatically monitoring the level of water in a swimming pool, or the like, by monitoring the level of a float within a float chamber supported by water siphoned from the pool system, for detecting when the level of water has fallen a predetermined amount or distance below a predetermined desired level and for controlling the input of fresh water into the pool system in response to the detected level for restoring the water in the pool to the predetermined desired level as determined by the position of the float on the siphoned water within the float chamber being restored to a float position indicative of said predetermined desired level of water in the pool.

Abstract: A tubular conduit assembly for confining or conveying a pressurized fluid including a flexible, thin-walled inner tube coaxially disposed within a flexible armor or outer tube. The outer tube is preferably constructed from one or more helically-wound members corresponding with, and engaging, helical corrugations on the inner tube. The inner tube deforms in response to the pressure and/or temperature of the fluid in order to form an internal sealing layer or sleeve-type coating for the outer tube. A shrink fitting assembly is also disclosed, which is adapted for compressingly urging the conduit assembly into an anchored, sealing relationship with a nipple member or other connection device inserted within an open end of the conduit assembly.

Abstract: The pressure vessel comprises an accumulator (10) having a piston (16) disposed in a bore (14). The piston (16) has gas under pressure on one side thereof maintained within the bore (14) by means of a multiple seal in an opening (26) having first (28), second (32), and third diameter (36) sections. The multiple seal includes a fill screw (40) threadedly engaging the second diameter section (32) of the opening (26), the fill screw (40) having a conical surface (46) sealingly engaging a seat (31) between the first diameter (28) and second diameter (32) sections of the opening. A cap screw (70) is threadedly received within the third diameter section (36) and compresses an O-ring (60) between the cap screw (70) and housing (12). The cap screw (70) has an annular rib (77) which bites into a shoulder (34) of the body (12) to provide an additional seal for maintaining the gas under pressure within the bore (14).

Abstract: The double-wall welded tube has two portions of the tube, in the region of which the weld (10) is located, which are each defined by the outer surface of a fold (6, 7) formed by the material constituting, in this region, the double wall of the tube. In this way, the regin in which the weld is effected is perfectly homogeneous and the weld can therefore be of very high quality.

Abstract: A reformable, shape retentive hose having a precured tube located in a hose sidewall, and a reformable rod inserted in the precured tube. A method for making hose by placing at least one precured tube in the sidewall of a hose during the time that the hose sidewall is formed, curing the hose assembly with the precured tube in the sidewall, and inserting a reformable rod in a portion of the precured tube.

Abstract: For compensating the variations in pressure of a liquid caused in particular by the piston pumps in a network, the device comprises a chamber having an inlet and an outlet for connection in series with said network and a rigid-walled hydropneumatic damping element disposed inside said chamber so that it is completely surrounded by said liquid.The device may be cleaned and sterilized without dismantling and is particularly suitable for the treatment of sterilized liquids which have to be homogenized, for example, when it is placed between the piston pump of a homogenizer and the homogenization gap.

Abstract: A guide tube assembly for an industrial endoscope comprises a multiplicity of tube segments arranged to form therein a long guide bore. A hand actuator is connected to a proximal one of the tube segments. At least one pair of elongated members have their respective one ends fixedly secured to a distal one of the tube segments, and extend through communication bores formed in the remaining tube segments to the hand actuator. A resilient member is mounted on the hand actuator for resiliently pulling the elongated members to bias the tube segments so as to bring them into contact with each other.

Abstract: A dual wall safety tube assembly comprises an inner, seamless, stainless steel tube of extended length and an outer, welded stainless steel tube of the same length, in which the inner tube is connected as a process line without any junctions except for end couplings and the outer tube is similarly connected as a monitoring or inerting conduit. The assembly may include further options of electric heating cable, plastic jacketing and thermal insulation of fiberglass or similar material.

Abstract: The pressure accumulator (10) comprises a cylindrical housing (12) having a bore (14) with a piston received slidably therein. The piston (30) has an H-shaped cross section and includes a reduced diameter portion (34) extending longitudinally along the piston (30), and a sealing device (36, 38) disposed at each end of the reduced diameter portion (34). A cylindrical sleeve (44) is received in the reduced diameter portion (34) such that each end of the sleeve (44) abuts a respective sealing device (36, 38). The housing (12) has an exterior circumferential groove (20) with an O-ring (26) therein, and a radial opening (22) extending between the circumferential groove (20) and bore (14).

Abstract: An antiburst system for water lines. A pipe has an inlet connected to a source of water and an outlet. A flexible tube is positioned in the pipe and is supported by a coiled spring extending along the longitudinal axis of the tube. An air vent section is coupled to the interior of the flexible tube for enabling atmospheric air to enter and escape from the interior of the flexible tube.

Abstract: A mounting ring assembly for a toilet bowl having a vertically oriented tubular member having a predetermined height. An annular flange extends radially outwardly from the top end of the tubular member. A base plate is located a predetermined height above the bottom end of the tubular member and it extends radially outwardly from the outer surface of the tubular member. A plurality of gussets connect the annular flange and the base plate. A plurality of open end slot assemblies are formed in the top surface of the annular flange and each of these have a bolt head slot and a bolt shank slot. A framework of a bottom wall, a pair of laterally spaced side walls and an end wall are formed around the open end of the open end slots. The open end slots receive bolts that are used to attach the base of a toilet bowl to the mounting ring assembly.

Abstract: A hydropneumatic accumulator has a separator piston, movable in the chamber of a housing. A switch member is attached to the separator piston by a support for simultaneous movement. Sensors can be influenced by the switch member position. The switch member is surrounded by a tube member which supports the sensors and is attached to the housing. A filling attachment is provided on the tube member. A filling conduit extends within the tube member and adjacent the support to simplify the configuration of the hydropneumatic accumulator.

Abstract: A system for use in swimming pool construction for temporarily holding a rounded coping to a wall form during pouring of concrete, making the coping a permanent part of the swimming pool but permitting quick removal of the wall form, includes, at intervals, a lag screw rotatably mounted on the top of the wall form in position for the threaded pointed end of the lag screw to engage a vinyl liner slot in the coping, and when rotated to draw the coping against the wall form. To prevent the screw from "walking" in the slot when rotated and to assure coping level, an even coping line and straight wall construction, a coping alignment track on the wall form has a lateral protrusion fitted into the vinyl liner slot and length extending longitudinally of the coping from one lag screw to the next.

Abstract: A fitting for coupling a drain pipe to an opening in the base of a shower or other installation where water may accumulate includes a cylindrical body fitted into the opening in coaxial relationship with the pipe and is of greater diameter than the pipe to provide an annular gap between the body and pipe. A resilient annular seal disposed in the gap is proportioned to be radially compressed between the body and pipe and has an annular slot extending downward within the seal from the upper surface of the seal. A rigid annular compressor member is wedged into the slot to increase radial compression at the upper portion of the seal. The construction can be easily installed and removed and tolerates small variations in the vertical position of the shower base relative to the drain pipe.