1853 results about "Recoil" patented technology

A valve prosthesis which is especially useful in the case of aortic stenosis and capable of resisting the powerful recoil force and to stand the forceful balloon inflation performed to deploy the valve and to embed it in the aortic annulus, comprises a collapsible valvular structure and an expandable frame on which said valvular structure is mounted. The valvular structure is composed of physiologically compatible valvular tissue that is sufficiently supple and resistant to allow the valvular structure to be deformed from a closed state to an opened state. The valvular tissue forms a continuous surface and is provided with strut members that create stiffened zones which induce the valvular structure to follow a patterned movement in its expansion to its opened state and in its turning back to its closed state.

A two-stage or component-based valve prosthesis that can be quickly and easily implanted during a surgical procedure is provided. The prosthetic valve comprises a support structure that is deployed at a treatment site. The prosthetic valve further comprises a valve member configured to be quickly connected to the support structure. The support structure may take the form of a stent that is expanded at the site of a native valve. If desired, the native leaflets may remain and the stent may be used to hold the native valve open. In this case, the stent may be balloon expandable and configured to resist the powerful recoil force of the native leaflets. The support structure is provided with a coupling means for attachment to the valve member, thereby fixing the position of the valve member in the body. The valve member may be a non-expandable type, or may be expandable from a compressed state to an expanded state. The system is particularly suited for rapid deployment of heart valves in a conventional open-heart surgical environment.

A two-stage or component-based valve prosthesis that can be quickly and easily implanted during a surgical procedure is provided. The prosthetic valve comprises a support structure that is deployed at a treatment site. The prosthetic valve further comprises a valve member configured to be quickly connected to the support structure. The support structure may take the form of a stent that is expanded at the site of a native valve. If desired, the native leaflets may remain and the stent may be used to hold the native valve open. In this case, the stent may be balloon expandable and configured to resist the powerful recoil force of the native leaflets. The support structure is provided with a coupling means for attachment to the valve member, thereby fixing the position of the valve member in the body. The valve member may be a non-expandable type, or may be expandable from a compressed state to an expanded state. The system is particularly suited for rapid deployment of heart valves in a conventional open-heart surgical environment.

A two-stage or component-based valve prosthesis that can be quickly and easily implanted during a surgical procedure is provided. The prosthetic valve comprises a support structure that is deployed at a treatment site. The prosthetic valve further comprises a valve member configured to be quickly connected to the support structure. The support structure may take the form of a stent that is expanded at the site of a native valve. If desired, the native leaflets may remain and the stent may be used to hold the native valve open. In this case, the stent may be balloon expandable and configured to resist the powerful recoil force of the native leaflets. The support structure is provided with a coupling means for attachment to the valve member, thereby fixing the position of the valve member in the body. The valve member may be a non-expandable type, or may be expandable from a compressed state to an expanded state. The system is particularly suited for rapid deployment of heart valves in a conventional open-heart surgical environment.

A valve prosthesis which is especially useful in the case of aortic stenosis and capable of resisting the powerful recoil force and to stand the forceful balloon inflation performed to deploy the valve and to embed it in the aortic annulus, comprises a collapsible valvular structure and an expandable frame on which said valvular structure is mounted. The valvular structure is composed of physiologically compatible valvular tissue that is sufficiently supple and resistant to allow the valvular structure to be deformed from a closed state to an opened state. The valvular tissue forms a continuous surface and is provided with strut members that create stiffened zones which induce the valvular structure to follow a patterned movement in its expansion to its opened state and in its turning back to its closed state.

A two-stage or component-based valve prosthesis that can be quickly and easily implanted during a surgical procedure is provided. The prosthetic valve comprises a support structure that is deployed at a treatment site. The prosthetic valve further comprises a valve member configured to be quickly connected to the support structure. The support structure may take the form of a stent that is expanded at the site of a native valve. If desired, the native leaflets may remain and the stent may be used to hold the native valve open. In this case, the stent may be balloon expandable and configured to resist the powerful recoil force of the native leaflets. The support structure is provided with a coupling means for attachment to the valve member, thereby fixing the position of the valve member in the body. The valve member may be a non-expandable type, or may be expandable from a compressed state to an expanded state. The system is particularly suited for rapid deployment of heart valves in a conventional open-heart surgical environment.

Devices and methods for establishing pericardial access to facilitate therapeutic and / or diagnostic applications. Pericardial access is facilitated, in part, by a tissue grasping device that reliably holds pericardial tissue, even in the presence of fatty deposits. The tissue grasping portion may include a tissue penetrating tip, a tissue dilating distal section, a tissue retention neck, and a tissue stop. When advanced into the pericardium, the tip may serve to create an opening (e.g., pierce, cut, etc.) in the pericardium, the distal section may serve to dilate the opening, the neck may serve to hold the tissue upon recoil of the dilated opening, and the stop may serve to limit further penetration once tissue is retained in the neck.

A firearm including a barrel having a chamber and an integrally formed upper receiver having a passageway, an accessory rail extending the complete length of the upper receiver, and a guidance feature extending along the passageway. The firearm also includes an operating rod having an anti-bounce mechanism, a bolt that is rotated counter-clockwise to lock against the chamber, a bolt carrier having a safety extension disposed below the bolt that prevents a hammer from striking a firing pin until the bolt is locked against the chamber, a lower receiver, a recoil spring assembly, and a fire control group. The bolt includes a polymer spring that biases a sliding extractor against the base of a cartridge. The sliding extractor is disposed at an angle ranging from thirty degrees to fifteen degrees on the bolt face to provide a low ejection angle from the firearm.

The present invention provides a lumen support prosthesis composed of interlocking radial modules which is fabricated fully assembled from a signal piece shape, without welding or bonding. The prosthesis comprises at least one locking mechanism, allowing for one-way sliding of the radial modules and expansion of the prosthesis from a collapsed state, but inhibits radial recoil from the expanded diameter. The prosthesis may be fabricated from biologically degradable materials which have certain medical advantages.

Custom-length self-expanding stent delivery systems and methods enable precise control of prosthesis position during deployment. The stent delivery systems carry multiple stent segments and include a stent bumper for helping control the axial position of the stent segments during deployment. This enables the deployment of multiple prostheses at a target site with precision and predictability, preventing stent segment recoil and ejection from the delivery device and thus eliminating excessive spacing or overlap between prostheses. In particular embodiments, the prostheses of the invention are deployed in stenotic lesions in coronary or peripheral arteries or in other vascular locations.

An unmanned aerial vehicle (UAV) designed to extinguish fires from the air while remaining tethered to the ground via a tether system fashioned to provide the UAV with power and extinguishant. The UAV is preferably electrically powered and is stabilized in the air via a system of gyroscopes fashioned to work in concert with a series of electric motors capable of moving to counteract the opposing recoil force exhibited as water escapes the nozzle of the tether. A command and control unit on the ground supplies the UAV with electricity and water via the tether. The UAV is preferably stored within and launched from the command and control unit. Controls and sensor readings are communicated to a controller—be it autonomous or human—on the ground, preferably within or proximal to the command and control unit.

Custom-length self-expanding stent delivery systems and methods enable precise control of prosthesis position during deployment. The stent delivery systems carry multiple stent segments and include a stent bumper for helping control the axial position of the stent segments during deployment. This enables the deployment of multiple prostheses at a target site with precision and predictability, preventing stent segment recoil and ejection from the delivery device and thus eliminating excessive spacing or overlap between prostheses. In particular embodiments, the prostheses of the invention are deployed in stenotic lesions in coronary or peripheral arteries or in other vascular locations.

A buttstock for a firearm having a buffer recoil mechanism is collapsible and adjustable. The buttstock includes a lower receiver extension having a bore therein that fits over the buffer recoil mechanism, the lower receiver extension being fixed to the buffer recoil mechanism; a buttstock body having a bore therein for receiving the lower receiver extension; a locking lever disposed along the bottom edge of the buttstock body; a locking pin disposed in the buttstock body and in the locking lever; and a compression spring disposed around the locking pin for biasing the locking pin towards the lower receiver extension.

An intraluminal, balloon expandable stent for implantation in a body lumen is disclosed. The present invention provides a lumen support stent with an unobstructed through-lumen for use in a blood vessel. A constraining mechanism is provided for securely maintaining the stent in the collapsed condition during delivery. The stent is preferably formed with a series of interconnected slide and lock mechanisms for permitting movement from a collapsed condition to an expanded condition and inhibiting radial recoil from the expanded condition. The stent may be formed from a shape memory alloy for providing crush-recovery after deployment.

A lancing device with automatic stick and lance return features is disclosed. A drive mechanism within the unit comprises a slider-crank linkage combination. It is biased by a spring member to cause automatic firing once a crank member advanced by a user causes movement of an internal linkage member beyond its fully-cocked position. After firing, the lance is withdrawn so as not to pose a threat of secondary injury to the user. In use, the device is substantially silent though its course of operation. Yet, its configuration lends itself to producing a very quick, virtually painless stick with minimal recoil or shock to the device.

In accordance with the invention, there are provided medical devices for providing a fluid passage between two areas in the body. An embodiment of the present invention relates to a stent comprising a tubular member comprising a distal transition region and a proximal transition region adapted to provide the ability for the stent to accommodate the dynamic urinary tract anatomy that stretches and relaxes. The distal transition region and the proximal transition region is adapted to exhibit a physical property that provides both longitudinal elasticity, allowing for stretch and recoil, as well as radial elasticity, allowing for bending and recovery.

A gas operated action for auto-loading guns may comprise a receiver, a biasing spring, a bolt-carrier reciprocable within the receiver, a bolt having a cam pin, and an action rod fixedly attached to the receiver. The cam pin may engage the action rod during recoil travel of the bolt and bolt-carrier, thereby preventing rotation of the bolt when the cam pin is engaged with the action rod.

The invention relates to an expandable stent comprising circumferentially adjacent modules. The modules comprise longitudinally adjacent slide-and-lock radial elements which permit one-way sliding of the radial elements from a collapsed diameter to an expanded / deployed diameter, but inhibit radial recoil from the expanded diameter.

A weapon system for urban combat incorporating an automatic gun having a short recoil, a feed system with gun driven box magazines of different capacities, a detachable link-belt feed, spring buffered barrel and bolt recoil absorbing arrangement, and simplified fire control.

Systems and methods for enhancing circulation are described. In one particular embodiment, the invention provides a method for enhancing circulation. The method comprises attaching at least one compression device to at least a portion of a person's lower extremity. The person's chest is repetitively compressed so that the chest experiences a compression phase and a recoil phase or decompression. Also, the person's lower extremity is compressed using the compression device during at least some of the recoil phases.

A gas operated action for auto-loading guns may comprise a receiver, a biasing spring, a bolt-carrier reciprocable within the receiver, a bolt having a cam pin, and an action rod fixedly attached to the receiver. The cam pin may engage the action rod during recoil travel of the bolt and bolt-carrier, thereby preventing rotation of the bolt when the cam pin is engaged with the action rod.

Disclosed is an upper receiver assembly for use with an AR15-type lower receiver. The upper receiver assembly includes a monolithic upper receiver and forearm housing. A barrel has a breech end, a muzzle end, a bore axis, and a barrel trunnion at the breech end having a lug for direct connection to the lower receiver using the pivot pin. It includes a bolt carrier assembly, having a longitudinal slot and rail engagement with the upper receiver housing on which the bolt carrier assembly slidably reciprocates, and a long-stroke gas-piston actuation system. A recoil spring assembly is housed within the monolithic upper receiver and forearm housing and extends coaxially with the longitudinal axis of the gas-piston actuation assembly. The barrel trunnion and gas block are configured for engagement with the upper receiver and forearm housing with longitudinal keyway features.

The continuous safe suction device safely removes fluids from a patient's body. The device has a housing for storing a suction-producing member. The suction-producing member is a collapsible bulb or, in another embodiment, a spring-loaded membrane and casing that when compressed, upon recoil will apply gentle suction to an input tube that drains fluid from the patient and transports it into the suction bulb or membrane and casing. The suction bulb or casing has a pair of one-way valves secured in-line with respective input and output tubes. Upon complete filling it is recompressed to force the fluid in the bulb out through the output tube, which transports the fluid to an exterior fluid collection bag. The suction bulb or casing is compressed by a screw piston, controlled by a sensor that determines when the bulb is filled and emptied, the screw piston, in one embodiment, being withdrawn incrementally.

An attachment system is provided for attaching an auxiliary device to a weapon having a frame, and in particular to a weapon frame in the area forward of the trigger guard. An attachment mechanism on the auxiliary apparatus is adapted to be engageable with a rail on the weapon to selectively attach the auxiliary apparatus. The weapon may include a transverse slot which can be engaged by a portion of the auxiliary device to prevent the auxiliary apparatus from sliding relative to the weapon due to recoil forces associated with firing the weapon.

A modular firearm comprising an adjustable modular buttstock assembly. The buttstock assembly can include a frame with a central opening. A comb assembly having a cheek piece and a butt plate assembly having a recoil pad each can be mounted to the frame by an adjustment apparatus. Each adjustment apparatus can include of a guide post and / or a threaded adjustment post each received in respective bores in the frame to adjust the positions of the cheek piece and recoil pad. The adjustment apparatus also can include a locking or engagement feature that can selectively increase the friction between the frame and the guide post and / or adjustment post, to help prevent the translation of the guide post and / or adjustment post in the bore in the frame to fix the comb assembly and butt plate assembly in desired positions with respect to the frame.

A multi-axis adjustable buttstock is taught that incorporates a buttstock, having, a grip neck, and a butt along with an interfaced set of two serrated grip retainers attached onto the buttstock grip neck, for buttstock tilt adjustment. A plurality of selectable flat and tapered grip spacers engage the grip serrated retainers for trigger grip length, cast and drop adjustment of the buttstock. A flanged stock bolt is disposed through a portion of the buttstock retaining the spacers and grip retainers while being embraced tightly by a first lock ring. A threaded rod is inserted into the buttstock a desired distance for length of pull adjustment and a second threaded lock ring is positioned on the threaded rod for securement. A recoil pad adapter plate, having a plurality of concentric holes, is attached to the threaded rod, for recoil pad slant adjustment, and a recoil pad is attached to the adapter plate aligned with selected recoil pad holes for recoil pad height and angle adjustments.

A stock assembly for attachment to the receiver of a shotgun is described. The assembly includes a pistol grip; a stock; a connector tube slidable within a conduit in the stock, the stock and connector being selectively lockable to each other; an attachment member slidable within the tube conduit between fully inserted and fully extended positions; a first elongated connector attached to the attachment member and extending parallel to the longitudinal axis of the tube into attachment with the pistol grip; a second elongated connector extending from the pistol grip into engagement with the receiver, the second member being at an angle to the first member; and a compression spring in the tube conduit urging the attachment member toward its fully extended position.

A combined focus and reticle illumination system for a riflescope which uses a single, dual functioning turn knob mounted on the scope turret for focusing and activating and deactivating the illuminated reticle. During use, the turn knob is rotated to adjust the relative position of a sliding focusing cell assembly located inside the scope body in front of the erector tube. The reticle, attached to the proximal end of the erector tube, includes a side mounted LED. The turn knob has a push-pull movement and a battery located therein that disconnects and connects, respectively, the electric circuit. The sliding focusing cell includes a rigid outer housing that is resistant to bending and a rear sliding lens cell that is biased in a rearward direction to be self-centering during recoil. Wires extend from the turn knob to the LED along the scope sidewalls and are designed to preclude twisting.