Class 138/93 - Inflatable

Subclass of Class 138 - Pipes and tubular conduits
Definition: Plugs for pipes having an inflatable member to seal against
No. of patents: 266
Last issue date: 11/29/2011

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Number	Title	Issue Date
4245970	Apparatus having a tubular inflatable bladder and a grout dispensing nozzle for connecting lateral branches to a relined main A method for connecting a lateral sewer line to a main sewer line which is relined with a plastic pipe liner, comprises plugging a lateral sewer line upstream of the main sewer line to seal off the lateral sewer line, spraying a grout material downstream ...	01/20/1981
4203473	Closure plug assembly The closure plug assembly is used for pressure testing of fluid drain and vent systems. The assembly comprises an inflatable body portion or bulb connected to a rigid holder portion. The rigid holder portion includes a stem section and a plug section. The...	05/20/1980
4185806	Fluid material flow control valve A fluid material flow control valve comprised of a conduit having an inlet end and an outlet end, and a remotely inflatable valving element disposed in the conduit between its inlet and outlet end such that the conduit can be variably opened to fluid flow...	01/29/1980
4183370	Pressure relief valve A safety vent for hopper cars includes a tubular housing member adapted to communicate with the interior of a hopper which may be unloaded by creating a sub-atmospheric pressure therein. The vent includes a rupturable diaphragm normally blocking the entra...	01/15/1980
4160464	Sealing members A sealing member for insertion into a bore of a pipe comprising a flexible inflatable toroidal bag which when inflated expands radially outward to contact the bore of the pipe and expands radially inwards to obturate the pipe....	07/10/1979
4155373	Method for shutting off gas flow in plastic pipes A tubular plastic fitting is joined to the pipe wall of a plastic gas pipe and a hole is cut through the pipe wall within the fitting, leaving a ledge or shoulder around the hole as a stop for a balloon-type stopper which is then inserted and inflated wit...	05/22/1979
4144908	Pipe plugging device and method A temporary plug for insertion into an open end of a conduit for gaseous fluids comprises an imperforate body having a fluid tight distensible member which is arranged to be enlarged by the introduction of fluid therein, and to seal against the inside sur...	03/20/1979
4122869	Closure plug assembly The closure plug assembly is used for pressure testing of fluid drain and vent systems. The assembly comprises an inflatable body portion or bulb connected to a rigid holder portion. The rigid holder portion includes a stem section and a plug section. The...	10/31/1978
4119100	Surgical device for discharge of faecal matter from the colon A surgical device for discharge of faecal matter from the colon comprises a bent drainage duct whose inner end lies within the lumen of the colon and is surrounded by an inflatable bag for filling the lumen, the outer end of the duct projecting through th...	10/10/1978
4083384	Method and apparatus for injecting foam into a pipeline, including an inflatable plug Method and apparatus for injecting foam into a pipeline. Foam is produced and delivered under pressure to the inlet of a flexible foam-conducting tube. An inflatable plug slidably encircles the tube, so that the tube can be adjusted to extend any desired ...	04/11/1978
4080799	Mechanical pipe end seal/alignment device A multi-purpose pipe end seal/alignment device is provided for sealing pipe ends against internal or external pressure while protecting the pipe end preparation from damage to facilitate a permanent pipe joining process at a remote location in an adverse ...	03/28/1978
4079755	Inflatable pipe plug An inflatable pipe plug in which a series of reinforcing strips of rubber tire cord having unidirectional threads are sandwiched between inner and outer molded members of rubber. The strips include pairs crossing each other with their threads at angles to...	03/21/1978
4077435	Pipeline plugging apparatus Apparatus for plugging a pipeline may comprise: a tubular body; seal assemblies carried by the body for moving the body through the pipeline in response to fluid flow therethrough and for sealing between the body and pipeline; an internal valve carried by...	03/07/1978
4076872	Inflatable cellular assemblies of plastic material Pneumatic structural and cushioning material of plastic sheets, bands, and/or tubes, which are compartmentized into a plurality of chambers. The material is capable of convenient and economical storage and shipment in a collapsed state and rapid inflation...	02/28/1978
4043132	Method and apparatus for preventing fluid solidification in an aperture A method of and apparatus for the installation and retrieval of instrumentation hardware supported through a hole in a section of ice is provided wherein an expansion member such as an inflatable bladder is utilized for displacing water normally subject t...	08/23/1977
4029128	Device for plugging a hollow of a concrete pile A plug for a concrete pile having a hollow extending therethrough is in the form of inflatable bag made of impervious material and is secured in a portion of the follow adjacent the top end of the concrete pile in tight engagement with the inner surface t...	06/14/1977
4026329	Method and apparatus for remotely and releasably sealing a pipeline Methods for releasably plugging off a section of a pipe line and apparatuses for practicing or carrying out the methods are disclosed. An apparatus comprises one or more pigs, each pig having an inflatable ring therearound, inert gas therein for inflating...	05/31/1977
4021265	Method and apparatus for cleaning tubular structures Removal of foreign objects from tubular structures is accomplished by inserting a pressurizable tube with an expandable end chamber into the tubular structure past the position of the foreign object, forming a seal within the interior of the structure by ...	05/03/1977
4013097	Apparatus and method for damming a pipeline An apparatus useful in damming the flow of fluid through a pipeline is shown. The apparatus comprises an inflatable bladder encompassed within a flexible, expandable outer bag made of a rubber-like material. The bladder and bag are separated by an annular...	03/22/1977
4011620	Pipeline tool for launching two pipeline clearing spheres Pipeline tool for closing an open end of a pipeline and which is suitable for use with a pipeline sphere for clearing a pipeline has a tubular member for holding two spheres side by side and pipes for supplying compressed air to launch the spheres individ...	03/15/1977
3990464	Heat-responsive duct closing method and apparatus A method and apparatus are disclosed for controlling the passage of air, smoke and noxious fumes through the heating and ventilating ducts of a building by means of a normally-collapsed, leak-proof bag which expands upon activation by smoke detection mean...	11/09/1976
3958607	Apparatus for sealing pipe leaks Pipe leak method and apparatus are provided in which the apparatus includes a pair of inflatable sleeves having each end of each sleeve sealed and connected by a flexible connection in spaced relationship to each other. One sleeve has a fluid connection f...	05/25/1976
3951173	Method and apparatus for sealing large diameter pipes An inflatable packer positionable in the interior of pipes for packing a sealant material into a void or joint in the pipe wall. Inflatable outer casings mounted on a support rim are utilized to seal off the area surrounding the void or joint. The support...	04/20/1976
3946761	Packer for sealing pipe leaks A packer apparatus for the internal sealing of pipe leaks having a cylindrical structure and a single sleeve located on the exterior of the cylinder. The single sleeve has a pair of inflatable chambers connected together in spaced relationship to each oth...	03/30/1976

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Class 138/93 - Inflatable