146 results about "Ball release" patented technology

An improved roulette type game in which an electronic Start signal triggers a Launch signal, but only after an electronically generated random time delay.

A ball release mechanism is mounted near the intended seat. The ball or balls are kept out of the circulating stream. High circulation rates followed by curtailment of circulation places an outlet port in position to allow the ball or balls to be pushed out by a spring. The spring or one of the balls prevents the return of an ejected ball back into the protected pocket. The ball is delivered to the seat without circulation.

A lacrosse head having a soft mesh pocket with an area of its strings coated with stiffening material. The coated area defines, for example, a ball release area, a ball pocket, and/or a throwing channel. One embodiment provides a lacrosse head pocket that includes a continuous piece of mesh, and a stiffening material coating a first area of the mesh, with a second area of the mesh being uncoated. The first area defines, for example, a ball release area, a ball pocket, and/or a throwing channel.

The invention discloses a biological control ball releasing device matched with an airplane, which relates to the field of agricultural plant protection machinery. Two ball releasing devices are arranged at two sides of the airplane, so that the stability of the gravity center of the airplane is guaranteed; when the whole device works, a motor drives outer groove wheels in the left and right ball releasing devices to rotate, and the outer groove wheels drive the balls to reach a cylindrical ball guiding groove, and then the balls are discharged from the ball releasing devices; in addition, the releasing amount of the balls is regulated by regulating the rotating speed of the motor or the length of a ball releasing groove baffle; the left-right space between every two balls reaching the ground is regulated by regulating the size of an air inlet of an air inlet pipeline; the whole device realizes mechanical releasing of natural enemy insects in biological control, so that labor intensity is greatly reduced.

Apparatus and methods for cementing tubulars in a borehole are disclosed In some embodiments, the apparatus includes a housing, a cartridge disposed within the housing, and an actuator. The housing includes a fluid entry port and a fluid exit port The cartridge includes a first chamber and is moveable between a first and a second position In the first position, the first chamber is out of fluid communication with the entry port and the exit port. In the second position, the first chamber is in fluid communication with the entry port and the exit port. The actuator is adapted to move the cartridge between the first and second positions.

Provided is a pull pin that is configured to lock in a forward position to prevent accidental or undesirable retraction of the pull pin. The pull pin has a housing, a pull pin shaft, an inner shaft, a first and second spring, and at least one ball bearing. The housing has a ball locking space, which holds the ball bearing between the locking space and a ball aperture formed in the pull pin shaft to thereby lock the pull pin shaft in the forward position. Only upon the application of an external force to the inner shaft, which aligns a ball release portion with the ball aperture, can the ball bearing move into the ball release portion and thereby move out of said locking space, allowing for the retraction of the pull pin shaft.

The present invention relates to a pitch dynamics device, the pitch dynamics device being interconnected with a pitching machine for causing the pitching machine to vary the pitch dynamics of pitched balls. Optimally, variances in pitch dynamics can include varying pitch speed, pinch plate angle, and the pitch release point. The pitch dynamics device can vary the pitch dynamics of pitched balls by adjusting a pinch plate position and angle to control the location of a pitch release point, trajectory angle, and ball release speed. The resultant is that the pitch dynamics device can allow a single-wheel pitching machine to throw different speed pitches with similar accuracy, in a batter's strike zone area, without changing the pitching machine setup which may include recalibrating the pitching machine, throwing a series of test pitches to verify pitch accuracy, changing pitching machine wheel speed, or adjust pitching machine tilt angle.

The present invention relates to an apparatus for dropping a ball into a wellbore. The apparatus is particularly useful for dropping a ball that has a diameter that is larger than the diameter of a bore within a wellbore tool above the apparatus. The ball-releasing apparatus first comprises a tubular body. The tubular body has a bore therethrough that is in fluid communication with the bore of the wellbore tool. A piston is placed within the tubular body. The piston has a top end disposed within the tubular body, and a bottom end disposed below the bore of the wellbore tool. The ball-releasing apparatus further comprises a connector for releasably connecting the piston to the ball. In one arrangement, the ball-releasing apparatus is connected to the bottom of a wiper plug for dropping a ball during a wellbore cementing operation. In one aspect, the ball is dropped by dropping a second ball having a diameter that will pass through the wellbore restriction, and then injecting fluid under pressure against the second smaller ball in order to actuate the releasable connection.

A tennis ball delivery device for use in practicing one's tennis stroke. The device includes an adjustable frame, at least one declining ball delivery conduit carried by the frame in an upper portion thereof, a declining ball discharge shoot carried by and communicating with the delivery conduit and a ball release mechanism carried by the discharge conduit. The release mechanism allows a single ball to fall from the shoot in response to the activation thereof. A depending handle that can be easily struck by the player's racket in initiating their tennis stroke is operatively connected to the release mechanism so as to effect the release of the ball.

A game machine has a controller with one or more consoles for recording a player's bet. The machine also has a motor-driven, concave wheel with a plurality of circumferentially spaced compartments. Each compartment can hold temporarily and release the ball. The wheel can produce an outcome signal indicating ball rest position. The controller can signal whether a player's bet has won based on the outcome signal. The base supporting the wheel has a return track for sending the ball released from the wheel to one or more elevators. The elevator can lift the ball to an associated ball striker that can propel the ball back to the wheel. The machine can have one or more stations for propelling the ball.

The invention discloses a volleyball trainer which consists of a shell 3, a ball hitting paddle 2, a ball releasing tube 5 and a motor 7, etc. and is characterized in that a ball intake port is arranged above the shell 3 which is internally provided with an arc wall 1; two side walls of the arc wall 1 and the shell 3 form a volleyball launching chamber a central axial point of which is provided with the ball hitting paddle 2 with the motor 7 which is arranged on the shell 3; the other side wall of the shell 3 is provided with the ball releasing tube 6 which is connected with a ball releasing hole 5 at the side of the shell 3. The device of the invention has simple structure and convenient use and effectively solves the problems of various technical movement training of volleyball teaching by a single player, thereby meeting the demands of physical education teaching of various schools and physical education and training of athlete teams.

Tennis balls are releasably connected to a string depending from a support. When the user strikes the ball, the ball releases from the string and the string automatically retracts into the support to reduce interference of the string with a user's subsequent stroke. The system is fully adjustable to replicate shots ranging from a ground shot to an overhead service. The system is lightweight, portable, and adaptable to a plurality of sports.

A servingdevice for volleyball training teaching is disclosed, and includes the base and the forward and reverse motors, a support column is fixed above the base, and the upper part of the supportingcolumn is connected with the supporting platform through a connecting bolt, a support plate is fixed above the support table, a ball release frame is connected above the support plate, and a lower ball opening is arranged below the ball placing frame, the left side of the rotating gear is connected with a rack, a sliding groove is arranged on the surface of the support column, a finite position plate is arranged on the lower right of the ball placing frame, a groove is arranged on the surface of the support plate, a fixing clamp bar is fixed inside the groove, a rotating protrusion is connected on the outer side of the fixing clamp bar, and a third spring is connected between the fixing clamp bar and the rotating protrusion. The serving device for volleyball training teaching can automatically supplement the dispatched ball, and can dispatch a revolving ball similar to the actual combat, at the same time, the firing angle of the ball can be adjusted, so that the device is more convenient for teachers to use.

The ball throwing device (1) (FIG. 1) can be attached to a dog leash (2) (FIG. 2) or purposely made length of strap (3) (FIG. 10) using the purposely designed handle on the ball throwing device (4) (FIG. 1) or loop (15) (FIG. 10) or cord lock handle (12) (FIG. 19). With the ball throwing device (1) (FIG. 11) securely attached to a dog leash (2), the clasp end of the dog leash (5) can then be connected to a supplied retaining ring (6) located on the leash handle (7). The ball throwing device can be used for picking up a ball (8) (FIG. 6) hands free. This is achieved by placing the ball throwing device (1) over a ball (8) (FIG. 9) and pressing down firmly. The ball throwing device (1) fits neatly over the ball (8) and is able to hold the ball securely. The ball throwing device (1) (FIG. 5) could have an adjustable mechanism (9) or (FIG. 22) threaded knob (13) entering a threaded washer (14) for the purpose of controlling the distance that a ball (8) can be thrown. This can be achieved by rotating an adjuster knob (10) (FIG. 5) or (13) (FIG. 22), which is located on the outside edge of the housing cup hemisphere. The adjuster knob (10) (FIG. 5), which when rotated, causes a tapered inner plate (9) (FIG. 3) located on the inside of the housing cup (11) to revolve (FIG. 4) and can be used to decrease the overall size of the housing cup's (1) (FIG. 5) inner casing hemisphere (11). The threaded knob (13) (FIG. 22) can also be used to decrease the overall size of the inner casing hemisphere (11) by rotating the threaded knob (13) inward. With the ball throwing device (1) (FIG. 12) attached or incorporated into a dog lead (2) (FIG. 11) or strap (3) FIG. 10), the lead/strap can be swung in a forward/over arm throwing motion (FIG. 12), allowing the ball (8) to be projected. The projection of a ball is achieved by the ball releasing from the housing cup (1) through the use of centrifugal force. The distance a ball (8) can be thrown depends on which position the adjuster mechanism plate (9) (FIG. 14) is set. With the adjuster knob (10) rotated so that the tapered inner plate (9) (FIG. 3) is recessed and in the downward position, the tapered plate (9) falls behind the line of the inner casing hemisphere (11) (FIG. 14). The adjuster, whilst in the downward position, causes no interference with the ball (8) held within the housing cup (1) and enables the ball (8) to release and exit from the ball throwing device (1) with less force and momentum that is applied through the over arm swinging action of the leash (2) or strap (3) (FIG. 12). With the adjuster mechanism (9) (FIG. 4) in the upward position, the tapered inner plate (9) (FIG. 15) falls to the outside line of the housing cup's inner casing hemisphere (11). The tapered plate (9) (FIG. 5) whilst in this upward position, reduces the overall size of the inner casing hemisphere (11) which in turn, interferes and tightens the ball (8) (FIG. 9) against the housing cup's inner casing hemisphere (11) therefore holding the ball (8) inside the housing cup (1) more securely. The upward position of the tapered plate (9) (FIG. 5) also requires the user to apply more force to the over arm throwing action (FIG. 12) to enable the ball (8) to release and exit from the ball throwing device (1) with greater force and momentum, which in turn results in the ball (8) travelling further. The ball throwing device (1) (FIG. 6) is designed so that it can be held on the dog leash (2) whilst not in use, with or without the ball (8) inserted (FIG. 16). This feature enables the user to avoid having to place the dirty, messy ball (8) in their pocket or bag.

The invention relates to a ball seat assembly and a ball-pitching sliding sleeve type fracturing device. The ball-pitching sliding sleeve type fracturing device comprises an inner sleeve, and outer sleeve, a fracturing ball, and the ball seat assembly. The inner sleeve is slidably sleeved in the outer sleeve. The inner sleeve and the outer sleeve are respectively provided with fracturing windows. The inner sleeve slides to open or close the fracturing window. The inner side surface of the outer sleeve is provided with a fracturing ball releasing groove. The fracturing ball is pitched on the ball seat assembly. When the ball seat assembly moves to the fracturing ball releasing groove, the fracturing ball generates thrust under the action of external forces, to push a plurality of ball seat supports to move outward along a radial direction, and the fracturing ball passes through the ball seat assembly and falls into a next section of the ball-pitching sliding sleeve type fracturing device. Using the ball-pitching sliding sleeve type fracturing device can realize an objective of fracturing an infinite layer section by just pitching a ball, and construction cost is reduced and yield of a single well is increased. The device solves defects in the prior art of range limitation of a fracturing sliding sleeve and influence of sliding of the inner sleeve after a shear pin is cut off.

The invention discloses a stomach food diverter which comprises a membrane releasing ball, ball releasing wires, a membrane pipe, a first bracket, an outer shell, an inner shell, a pushing pipe and a bracket pipe, wherein the outer shell, the inner shell, the pushing pipe and the bracket pipe are sheathed together from outside to inside; one end of the inner shell, one end of the pushing pipe and one end of the bracket pipe are positioned in the outer shell and extend out of an oral cavity, and the other end of the inner shell, the other end of the pushing pipe and the other end of the bracket pipe extend out of the outer shell; one end of the outer shell is abutted against the membrane releasing ball; one end of the pushing pipe and one end of the membrane pipe are connected with the membrane releasing ball by the ball releasing wires; the membrane pipe in a folded shape is positioned in the outer shell; the first bracket is connected with the other end of the membrane pipe and positioned on the bracket pipe. The stomach food diverter disclosed by the invention has the advantages of simple structure, low manufacturing cost, convenience in operation and convenience in popularization and use. Additionally, a treatment effect of a stomach diversion operation is achieved without performing the operation on a patient, the pain of the patient is relieved, and medical expenses are reduced for the patient. In addition, a certain weight loss effect on an obese patient is achieved.

In a fracking context the object that will ultimately block a passage in an isolation device is introduced into the zone with the bottom hole assembly. The object is not released until the guns fire to create a pressure spike in the borehole that triggers the object retaining device to release the object. The retaining device is placed in close proximity to the isolation device and its setting tool to allow a larger object and passage in the isolation device to be used. If the guns misfire, the object is not released and comes out with the guns. The replacement guns can be pumped in because the passage in the isolation device has stayed open during the misfire. Direct and indirect object release in response to pressure created from the firing of the guns is contemplated.