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An automatic bed maker which uses the expansion of inflatable bladder to straighten, align, and tuck-in bed-cover assembly.
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| Number | Title | Issue Date |
| 4570607 | Tennis ball throwing machine with continuously rotatable barrel having friction strip on one side only of inner wall A tennis ball throwing machine pneumatically expels tennis balls through a barrel having on one side of its inner wall a Velcro strip for spinning the ball. The barrel is rotated about its lengthwise axis so that the sense of the spin, topspin, backspin, ... | 02/18/1986 |
| 4554905 | Space probe/satellite ejection apparatus for spacecraft An ejection apparatus (19) for spinning and propelling objects (17) for ejection from a spacecraft (11) at a desired velocity and rotational speed. The apparatus includes a launch cradle (23) on which the space object (17) to be ejected rests. The cradle ... | 11/26/1985 |
| 4548190 | Air propelled projectile launcher A toy projectile launcher having a barrel and having front and rear ends formed of a tubular resilient material defining a bore and having the rear of the barrel sealed with a plug member. A projectile having a diameter at least as large as the bore of th... | 10/22/1985 |
| 4502455 | Ball feeder for throwing machine Tennis balls are sequentially fed to an entranceway in the top of the plenum chamber of a pneumatic throwing machine by a flexible disk which rotates about a vertical axis. The balls roll by gravity down a chute onto the feed disk which has angularly spac... | 03/05/1985 |
| 4485889 | Valve means for compressed air powered acoustic pulse generator A movable inner cylindrical valve member is rigidly attached to the upper end of an air powered impact projectile designed for striking a target to produce an acoustic pulse. By seating upwardly within the bore of a fixed outer valve member against spaced... | 12/04/1984 |
| 4424972 | Game apparatus A new game apparatus including a shooting device for shooting a ball and a target when the shooting device is loaded, balls are either shot automatically by the shooting device, or by a trigger operated by the user. The shooting device includes a pressuri... | 01/10/1984 |
| 4402381 | Vehicle mounting and deployment arrangement for seismic source A transportable, acoustic pulse generator is described employing an impact mass suspended above a freely movable target plate positionable on the ground, the impact mass being forceably propelled downwardly to strike the target plate to generate an acoust... | 09/06/1983 |
| 4378169 | Resilient breech for microballistic printers A breech for the gun of a microballistic printer comprising a plurality of metal spheres positioned on the inside periphery of a cup, forming a central opening slightly smaller than the spherical projectiles used in the microballistic printer. The spheres... | 03/29/1983 |
| 4372283 | Ball serving apparatus having independently operating horizontal and vertical firing barrel oscillating means An automatic ball serving apparatus for serving tennis balls for practice purposes. Balls which are loaded into a feed container are passed through a main bucket and fired through a firing barrel by compressed air. A pair of motors oscillate the firing ba... | 02/08/1983 |
| 4345578 | Ball projecting device capable of providing spin A ball projecting device, preferably pneumatically operated, is provided wherein the projected ball has "spin". The device comprises a projection tube including a curved portion, wherein the area of maximum curve radius of the curved portion, preferably i... | 08/24/1982 |
| 4291665 | Propulsion device for spherical objects having an oscillating support frame providing a programmed discharge of said objects A propulsion device, designed especially but not necessarily solely for propelling tennis balls for training purposes, has in common with earlier devices a rotary distributor or magazine, feeding balls in successively following order into a discharge cond... | 09/29/1981 |
| 4273095 | Pneumatically-operated ball projecting device A pneumatically-operated ball projecting device is provided wherein the muzzle velocity of the projected ball is determined by a pneumatically-operated detent in the barrel of the device. The detent holds the ball within the barrel until a predetermined a... | 06/16/1981 |
| 4272078 | Game ball target return apparatus and method An improved ball return mechanism for a game like golf which includes a pressurizable ball receiving chamber for receiving a ball once played through a hole in a target area, a conduit extending between the hole and the chamber, a door separating the cond... | 06/09/1981 |
| 4270511 | Apparatus for shooting a curve ball An apparatus for shooting a curve ball used in the practice of baseball, table tennis, or tennis. A conventional shooting mechanism substantially comprises a flexible hose through which a ball is carried under air pressure, a loop holder which supports th... | 06/02/1981 |
| 4250862 | Ball projecting device capable of providing spin A ball projecting device, preferably pneumatically operated, is provided wherein the projected ball has "spin". The device comprises a projection tube including a curved portion, wherein the area of maximum curve radius of the curved portion, preferably i... | 02/17/1981 |
| 4241717 | Oscillating flight control device for a ball projecting machine A device for use with a tennis ball projecting machine to control the flight of the balls projected from the machine through a flexible tube. The device has a pair of adjacent casings supporting the tube. The first casing is pivotably mounted at its rear ... | 12/30/1980 |
| 4233953 | Propulsion device for tennis balls and like spherical objects having an improved programmed discharge of the oscillatory type A device for propelling tennis balls has an oscillating discharge barrel to which balls are fed from a rotating distributor. A programmed relationship is provided, including a motion-translating linkage oscillating the barrel as an extension of the mechan... | 11/18/1980 |
| 4212284 | Pneumatically-operated ball projecting device A pneumatically-operated ball projecting device is provided wherein the muzzle velocity of the projected ball is determined by a pneumatically-operated detent in the barrel of the device. The detent holds the ball within the barrel until a predetermined a... | 07/15/1980 |
| 4207857 | Automatic ball server Automatic ball serving apparatus for serving, lobbing, volleying or smashing balls, such as tennis balls, for practice purposes wherein two cans or buckets are vertically stacked to form a lower generally cylindrical compressed air chamber and an upper ge... | 06/17/1980 |
| 4112911 | Ball collector and projector apparatus Apparatus that collects and transports generally spherical objects, such as tennis balls, and recycles them to a practice device that propels the balls to a tennis player for practice or recreation. Balls are fed one at a time to a chamber from whence the... | 09/12/1978 |
| 4094294 | Ball projecting device A ball projecting device is provided for propelling a ball pneumatically, wherein the speed of the ball projected is, at least in part, determined by utilizing a pneumatically operated, preferably variable, detent in the barrel of the device. The detent h... | 06/13/1978 |
| 4084820 | Jet launch toy A jet launch toy which consists of a jet launching tube and missle together with a skilled users hands for entertainment and an extended version comprising the jet launching tube, together with a funnel shaped catching arrangement, together with a backboa... | 04/18/1978 |
| 4027646 | Propulsion device for tennis balls and like spherical objects A propulsion device is provided, designed especially for discharging tennis balls for practice purposes, at selected angles of inclination, and at a predetermined, selected velocity. Employed in the device is a distributor, which is disposed between a hop... | 06/07/1977 |
| 4021037 | Tennis practice machine Apparatus for collecting a projectile such as a tennis ball and launching it through the air is disclosed. The apparatus includes a conduit having an upstream end adapted to receive the projectile and a downstream end at which the projectile is expelled. ... | 05/03/1977 |
| 4004566 | Clip and indexing mechanism for a gas-operated gun A clip and indexing mechanism for a gas-operated gun which affords the visible inspection and incremental advancement and insertion of projectiles from the clip into the chamber of the gun. The clip is formed with a long narrow rectangular web across whic... | 01/25/1977 |
| 4002336 | Table tennis training device A table tennis training device for use in connection with a table tennis table, which includes a tennis ball catcher having a pocket for collecting the tennis table ball which is then, due to a suction effect, moved from the pocket into a gun operable to ... | 01/11/1977 |
| 3999754 | Table tennis trainer A table tennis trainer having a net trap erected for positioning at one end of a tennis table and associated therewith a ball collecting and return assembly having a ball collecting tube with negative pressure gradients to move the ball to a supply box wh... | 12/28/1976 |
| 3990426 | Tennis ball throwing machine Tennis balls are introduced via a removable ball pick-up magazine through a ball port in a wall of a pipe into a stream of air flowing through the pipe towards a barrel. Air flows freely through the barrel and through the ball port past a normally open fl... | 11/09/1976 |
| 3989245 | Tennis practice device having pneumatic ball projector An instant tennis game simulating a real game of tennis is presented. A pneumatic tennis ball delivery machine replaces the normal opponent. The court is slightly crowned and has sloping gutters so that all balls are automatically, gravity-returned to the... | 11/02/1976 |
| 3939816 | Gas filled coaxial accelerator with compression coil A self-energized plasma compressor which compresses plasma discharged from coaxial plasma generator. The device includes a helical shaped coil which is coaxially aligned with the center axis of the coaxial plasma generator. The plasma generator creates a ... | 02/24/1976 |
| 3938272 | Toy cannon A toy cannon for firing a resilient projectile when a compressed fuel-air mixture is ignited. Air is compressed into a chamber containing fuel as the resilient projectile is forced into the barrel of the cannon. An ignitor in the chamber is actuated from ... | 02/17/1976 |
