Abstract: A painless injection apparatus includes a first injector having a first storage chamber storing a numbing agent, a first needle, and a first plunger, and a second injector having a second storage chamber storing a medication, a second needle, and a second plunger. The injection apparatus further includes a plunger actuation device coupled to the first and second plungers and the second storage chamber. The plunger actuation device is adapted to sequentially advance the first plunger, the second storage chamber, and then the second plunger to inject the numbing agent and then the medication painlessly into a patient's tissues at the desired depths. The needles and medicine storage chambers are enclosed in a disposable portion of the injection apparatus which can be disposed of properly.

Abstract: An oscillating disk dental hygiene device of the present invention includes a quick coupling assembly having a first stage adapted to be coupled to a water source fixture and a second stage adapted to be quickly attachable and detachable from the first stage; a main housing defining a water chamber and having an inlet and an outlet, the inlet being coupled with the second stage of the quick coupling assembly; and a disk defining at least one opening therein and being disposed in the water chamber, the disk adapted to oscillate between a first substantially neutral position and a second position substantially obstructing the outlet when water entering the water chamber via the inlet has a pressure within a predetermined range, the oscillating disk creating a pulsating water stream exiting the water chamber via the outlet. A hand held nozzle is coupled to the outlet and is adapted to concentrate and direct the pulsating water stream into a pulsating water jet.

Abstract: A method and apparatus for downloading large items packages the item as a plurality of packets and numbers each packet with an index stored in a header. For each user to whom an item is to be downloaded, a list of packets to be sent to the user is maintained. A send process loops through each user. In any given loop, one or more packets from the list is sent to the user. These packets are then marked as having been sent on that user's list. Only one download buffer for storing the download packets and only one network communications buffer for use by a network and a connectionless transport service is required to send the packets to a plurality of users on demand. Each user indicates which packets it did not receive and those packets are added back to that user's list for sending.

Abstract: An apparatus and method for preparing infant formula from powdered formula dispenses water at a temperature substantially in a range around body temperature into a baby bottle containing powdered infant formula for mixing and immediate feeding to a baby, thereby avoiding unnecessary inconvenience to the baby's caregiver associated with typical methods of preparing infant formula for feeding. The water is filtered, disinfected and heated to the appropriate temperature for dispensing on demand.

Abstract: A coiled tubing injector includes two chains mounted for continuous, opposing rotation and aligned to grip between the continuous tubing. Behind a portion of each chain is a straight skate that presses gripper elements on the chain against the tubing as it passes between the chains. The skate includes a beam. Rollers are mounted on carriers, and the carriers slide into slots formed on the beam. A resilient pad is placed between the carriers and the beam. The gripper elements roll over the rollers as they are being pressed against the continuous tubing. Dimensional variations in gripper elements, rollers, and the roller carriers that may otherwise cause grippers to be out of alignment are accommodated by compression of the pad. Furthermore, the last roller at each end of each skate is mounted for pivoting against a spring in order to deflect as gripper elements turn into, or out of, alignment with the skate.

Abstract: The present disclosure is summarized as an improved cutting tooth for mounting on a stump cutting wheel driven by a suitable power plant. The tooth itself includes a long root to enable it to be clamped on the cutting wheel. When appropriately clamped, it is held with an extending neck terminating in a planar face. The face is constructed with an improved PDC hard surface layer. This is attached by a suitable WC-Co sintered alloy which joins the PDC layer to the tooth. This enables more certain anchoring of the PDC layer to the tooth. This enables more certain anchoring of the PDC face so that it does not break or flake during use and operation.

Abstract: A semi-recumbent, human powered, four wheel cycle has an independent front suspension and wheels that are turned. A conventional bicycle chain drive drives one or both front wheels. The rear wheels are also driven in additional embodiments.

Abstract: An apparatus and method is provided for coordinating two fluoroscope images, which permits accurate computer-based planning of the insertion point and angle of approach of a needle, drill, screw, nail, wire or other surgical instrumentation into the body of a patient, and subsequently guides the surgeon in performing the insertion in accordance with the plan.

Abstract: The gripping element of a coiled tubing injector has a carrier and a removable gripping shoe mounted to the carrier. The removable shoe slides onto slots formed on the carrier and is floated on the carrier by inserting an elastomeric pad sandwiched between the carrier and shoe. A manually depressible spring along ones side of the carrier prevents the shoe from sliding out of the slots during operation of the injector.

Abstract: An apparatus and method for preparing infant formula from powdered formula dispenses water at a temperature substantially in a range around body temperature into a baby bottle containing powdered infant formula for mixing and immediate feeding to a baby, thereby avoiding unnecessary inconvenience to the baby's caregiver associated with typical methods of preparing infant formula for feeding. The water is filtered, disinfected and heated to the appropriate temperature for dispensing on demand.

Abstract: A broad band loudspeaker (101) includes a diaphragm (103) driven by coil assembly (125) centered on a pole (131) of a magnet assembly (133) by a low-friction guide (127) depending from a lower end the coil assembly, and a low-friction guide mounted on an upper end of the pole (131). A suspension (107) for the diaphragm (103) includes two or more parallel, resilient suspension members (115a, 115b), extending between the diaphragm (103) and frame (105) and mounted through a pair of resilient mounting pads (119a, 119b, 125a, 125b). The lower guide (127) includes a flexible portion (151a) which acts like a flapper valve of a pump to create a current of cooling air past down the inside of the coil assembly (125), up the outside of the coil assembly and then out of flux gap (130).

Abstract: An apparatus and method is provided for coordinating two fluoroscope images, which permits accurate computer-based planning of the insertion point and angle of approach of a needle, drill, screw, nail, wire or other surgical instrumentation into the body of a patient, and subsequently guides the surgeon in performing the insertion in accordance with the plan.

Abstract: A coiled tubing injector has a transmission with reduction gear trains having two rotary power outputs for driving each of the injector's two chains, and one or more rotary power inputs located on the same side of the transmission as the rotary drive outputs.

Abstract: A barrier vehicle system for an amusement race track is formed from a chain of pivotally coupled barrier modules. Each barrier module has a top and a bottom link separated by a spacer structurally joined with the top and bottom links to create a rigid structure when assembled. A pin extends through the top and bottom links, to one side of the spacer. An resilient, deformable barrel is journalled on the pin. To assist in attenuating high energy impacts, an extendable, energy-absorbing mechanism is attached to one end of the barrier, and the other end of the barrier is anchored to the ground.

Abstract: A disposable toothbrush, comprising a first section (12) having a first proximate end (16) and a first distal end (18), a second section (22) having a second proximate end (28) and a first distal end (25), a plurality of bristles (20) coupled to the first distal end (18), a plug (30) sealingly disposed within the second section (22) and thereby forming a compartment (26) within the second section (22) between the plug (30) and the second proximate end (28), a quantity of powdered dentifrice disposed within the compartment (26) and a sealing means (32) sealingly disposed on the second proximate end (28) in order to seal the compartment (26) wherein the first proximate end (16) has a smaller cross-sectional dimension than the second distal end (25) so that the first section (12) may be placed in frictional, sliding engagement with the second section (22) when the first proximate end (16) is inserted into the second distal end (25).

Abstract: A "bump-feed" type line head (108) and replaceable spool (116) for a flexible line trimmer are specially adapted for removing and mounting the spool in a single manual movement to the line head to facilitate spool and line replacement. The line head includes a "U" shaped retention spring (118) mounted within a hub in the line head on with the spool is journalled. The spring includes knob-shaped sections (122) protruding through the hub, beneath the spool, for retaining the spool on the hub without interfering with a bump-feed indexing means. Pulling the spool from or pushing the spool onto the hub tends to deflect the knobs inwardly, allowing axially movement of the spool on the hub. The compression force of the spring is set to be sufficient to retain the spool on the hub during normal operation but not to withstand force manually applied in an axial direction to the reel.