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Richards Medical Company Patents
Assignee:
Richards Medical Company
Address:
Memphis, TN
No. of patents:
39
Patents:












Patent Number Title Of Patent Date Issued
D290511 Exposed outer cover for an in-the-ear hearing aid June 23, 1987
5078746 Femoral stem distal centralizer January 7, 1992
A device for centralizing a prosthetic femoral stem within a prepared natural femur and plugging the femoral canal inculdes a first member having a shape generally similar to the shape of the femoral stem for temporary insertion within the natural femur, a rod member for slidable ins
5064439 Orthopedic device of biocompatible polymer with oriented fiber reinforcement November 12, 1991
Orthopedic device of biocompatible polymer with oriented fiber reinforcement. There is provided a device such as a hip stem which has a longitudinally curved body. The reinforcing fibers are continuous filament fiber plies with parallel oriented fibers in each ply. The plies are curv
5047032 Method and apparatus for cutting joint surfaces September 10, 1991
Surgical instrumentation and a method for cutting bones on one or both sides of a joint such as the knee joint to allow the application of a joint prosthesis. A rod is inserted into the medullary canal of the bone to be cut. The rod is secured within the medullary canal and a router
5037438 Zirconium oxide coated prosthesis for wear and corrosion resistance August 6, 1991
Orthopedic implants of zirconium or zirconium-based alloy coated with zirconium oxide to provide low friction, highly wear resistant coatings especially useful in artificial joints, such as hip joints, knee joints, elbows, etc. The invention zirconium oxide coated prostheses are also
4990149 Releasable orthopedic broach handle apparatus February 5, 1991
A modular broach handle for use with a broach having a tapered configuration beginning at a wider upper end tapering to a smaller lower end. An elongated handle body portion has a longitudinal axis, with one end portion of the handle body defining a connection end portion for attachi
4973333 Resorbable compressing screw and method November 27, 1990
A compression hip screw for repairing a bone fracture includes a non-absorbable plate and a non-absorbable barrel section connected to the plate adapted to be inserted into a hole formed in the hip bone. A non-absorbable lag screw with a longitudinal opening therein and with internal
4969895 Apparatus and method for determining the tension on a ligament graft November 13, 1990
An instrument for determining the variation in tension of a ligament graft extending between first and second proposed fixation sites positioned on first and second articulated bones, respectively, comprises a yoke which carries a device for securing the yoke to one of the first and seco
4936305 Shielded magnetic assembly for use with a hearing aid June 26, 1990
A shielded magnetic assembly for use in a magnetic hearing aid is described. The shielded assembly uses a disc-shaped magnet with a high permeability, low coercivity material placed on the face of the magnet away from the air gap. Preferably, the shielding material also covers portio
4932972 Prosthetic ligament June 12, 1990
A prosthetic ligament assembly includes a nonaugmented prosthetic ligament for permanently replacing a natural ligament spanning first and second body members, such as the femur and tibia, and a bone screw adapted for tensioning the prosthetic ligament during implantation. The prosthetic
4921498 Metal core ossicular replacement prosthesis May 1, 1990
This invention is an ossicular replacement prosthesis made of porous polymeric material with a metal core of the type that includes a head portion for fitting against the tympanic membrane and a shaft for bridging the middle ear to provide conduction of sound to the middle ear.
4871364 Metal core ossicular replacement prosthesis October 3, 1989
This invention is an ossicular replacement prosthesis made of porous polymeric material with a metal core of the type that includes a head portion for fitting against the tympanic membrane and a shaft for bridging the middle ear to provide conduction of sound to the middle ear.
4862878 Orthopedic prosthesis to aid and support the shoulder muscles in movement of the human arm September 5, 1989
An orthopedic prosthesis including a trunk engaging means, an arm engaging means and a lift assist means. The trunk engaging means includes a shoulder engaging means comprised of a strap which passes over the injured shoulder and a support plate attached to each end of the shoulder strap
4827917 Fermoral fracture device May 9, 1989
An apparatus for treating fractures of the femur including a screw and an intramedullary rod. The screw has a threaded portion and a smooth portion. The rod has a head, stem and a longitudinal bore. There is at least one pair of coaxial holes through the stem, transverse to the longitudi
4817607 Magnetic ossicular replacement prosthesis April 4, 1989
An ossicular replacement prosthesis containing a magnet in the head of the prosthesis so that when used with a magnetic induction hearing aid having a coil producing a magnetic field, the hearing losses resulting from insertion of the prosthesis and any other remaining hearing losses can
4804691 Method for making a biodegradable adhesive for soft living tissue February 14, 1989
A method for making an adhesive for use in joining soft living tissue including the steps of preparing a hydroxyl-terminated polyester by reacting a biodegradable monomer with a polyhydroxy polymerization initiator in the presence of an amount up to about 2.0 weight percent of a cata
4802852 Irrigated drill and quick-release chuck assembly February 7, 1989
An electric motor-driven drill has an irrigating tube for squirting water onto a drill bur. The tube has convolutions surrounding the motor for cooling the motor and warming the irrigating water. A quick-release chuck holds the bur shank coupled to the motor shaft.
4800884 Magnetic induction hearing aid January 31, 1989
A magnetic induction hearing aid where the microphone, the amplifying electronics, the battery and a coil are contained in a single housing which is located deep in the ear canal. A magnet is attached to portions of the middle ear by means of a malleus clip or by implantation between
4790850 Phosthetic ligament December 13, 1988
A prosthetic ligament assembly includes a nonaugmented prosthetic ligament for permanently replacing a natural ligament spanning first and second body members, such as the femur and tibia, and a bone screw adapted for tensioning the prosthetic ligament during implantation. The prosthetic
4776329 Resorbable compressing screw and method October 11, 1988
A method for repairing a bone fracture with a compression screw assembly is provided. First and second non-resorbable compression members are positioned so that the head portion of the compression screw can protrude from the surface of the second non-resorbable compression member after
4775426 Method of manufacturing surgical implants from cast stainless steel and product October 4, 1988
A surgical implant is disclosed manufactured from cast austenitic stainless steel and cold-forged to a final shape. The endoprosthesis is initially a preform which is cast oversized in shape and dimensions. It is then compressed using the cold-forging process to its final size and shape.
4759071 Automatic noise eliminator for hearing aids July 19, 1988
A noise elimination circuit, especially for a hearing aid, which removes all sound below a predetermined level and transmits a compressed sound range for all sounds above a predetermined level. The circuit uses a field effect transistor as a voltage variable resistor to transmit a signal
4750492 Absorbable suture apparatus, method and installer June 14, 1988
An apparatus for repairing torn animal body tissue in a single procedure features a suture, anchor attached at one end of the suture to prevent the suture from being pulled through the tissue, and clenching device adapted to grip the suture on the opposite side of the tissue from where t
4744792 Middle ear ventilating tube May 17, 1988
A ventilation tube is provided for permitting gaseous communication between the middle ear and the outer ear canal of a recipient. The tube is formed of a material that resists extrusion from the tympanic membrane such as titanium or a titanium alloy or others, and includes an outer end
4735625 Bone cement reinforcement and method April 5, 1988
A reinforcing technique for bone cement used in the anchoring of prosthetic devices. The reinforced bone cement includes oriented reinforcement formed of a continuous fiber-like material that is embedded in the bone cement between at least a portion of the outer surface of the prosthetic
4731084 Prosthetic ligament March 15, 1988
A nonaugmented prosthetic ligament for permanently replacing a natural ligament spanning first and second body members, such as the femur and tibia includes a load bearing member formed from a plurality of biocompatible polyolefin fibers positioned at angles of from 0.degree. to 55.d
4718908 High-strength, cold-forged type 316L stainless steel for orthopedic implant January 12, 1988
A surgical implant manufactured from austenitic stainless steel by cold-forging has improved mechanical properties and corrosion fatigue resistance. The grain-size index for the cold-forged 316L stainless steel is increased from an ASTM grain-size index of about 8 to an ASTM grain-si
4704126 Chemical polishing process for titanium and titanium alloy surgical implants November 3, 1987
A method of chemically polishing medical implants by immersing them in a solution including lactic acid, hydrofluoric acid, and nitric acid to produce smooth, matte finished implants.
4679240 Touch sensitive hearing aid volume control circuit July 7, 1987
A touch sensitive electronic volume control circuit so that the gain of an amplifier can be changed to any level from zero to maximum and the gain can be retained for periods of time without user adjustment or for power supply replacement.
4671290 Automatic tourniquet June 9, 1987
A method and apparatus for measuring blood pressure and controlling the pressure of a pneumatic tourniquet at a desired level, either above the systolic blood pressure or at an absolute level.
4667664 Blind hole targeting device for orthopedic surgery May 26, 1987
The present invention relates to installation of orthopedic implants and, more particularly, to a device for locating blind holes in an implanted prostheses so that a screw for interlocking the prosthesis with surrounding bone can accurately be installed.
4660267 Method for fabricating an arthroscopic shaver April 28, 1987
An improved surgical device and method for manufacturing the device are provided. The device is a high rotating speed arthroscopic probe shaver with bearing means that give superior longitudinal and radial support. Further, the outer tube of the probe shaver is swaged to fit very closely
4650488 Biodegradable prosthetic device March 17, 1987
A prosthetic device formed of a biodegradable material and useful as a ventilation tube for insertion between the middle ear and the outer ear. The device includes a shaft with an axial passage, an inner flange and an outer flange. At least a portion of the outer surface of the shaft is
4620543 Enhanced fracture healing and muscle exercise through defined cycles of electric stimulation November 4, 1986
Method for applying electro-muscular stimulation within a specific range of on/off cycle wherein the length of the on/off cycle is related to the level of phosphocreatine within the muscle. The on cycle is for a period of from one to three seconds followed by an off cycle of from 50 to 1
4617922 Compression screw assembly October 21, 1986
A compression screw assembly for applying compression to a fractured bone includes a lag screw, a compression plate including a hollow barrel member adapted to receive the lag screw in at least one fixed orientation, a wrench assembly adapted to releasably engage the lag screw in axial
4616638 Compression screw assembly October 14, 1986
A compression screw assembly for applying compression to a fractured bone includes a lag screw, a compression plate including a hollow barrel member adapted to receive the lag screw in at least one fixed orientation, a wrench assembly adapted to releasably engage the lag screw in axial
4603694 Arthroscopic shaver August 5, 1986
An improved surgical device and method for manufacturing the device are provided. The device is a high rotating speed arthroscopic probe shaver with bearing means that give superior longitudinal and radial support. Further, the outer tube of the probe shave is swaged to fit very closely
4568337 Ventilation tube permitting two-way gaseous communication with one-way liquid valve February 4, 1986
A myringotomy tube allowing two-way gaseous communication between an external ear canal and a middle ear cavity and only one-way liquid communication from the middle ear cavity to the external ear canal includes a ball mounted within the tube to move freely into and out of contact wi
4554915 Bone fixation frame November 26, 1985
One external fixation frame, for immobilizing bone segments adjacent a fracture or joint, includes a fixation block with a pair of arms extending from the block across the fracture or joint. Another embodiment has but a single arm while a third embodiment includes one or two arms project

 
 
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