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"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 7338411 | Removable exercise pole It is the object of the current invention to provide a removable exercise pole with a base connected with a housing pole that is extended by means of a telescoping upper extension pole. The pole is held in place by a compressive tensioning mechanism that also allows... | 03/04/2008 |
| 7169094 | Circular fitness apparatus A circular fitness apparatus and method. The circular fitness apparatus includes plural flexible exercise attachments attached to a vertical pole in a hollow circular base that can be selected and used for simultaneous group or individual fitness exercises by plural... | 01/30/2007 |
| 7011608 | Pneumatic pogo stick A pneumatic pogo stick is comprised of an elongate cylindrical housing which forms a cylinder. The housing is formed from a clear polycarbonate plastic. A top cap is attached to one end of the housing to form the top of an air chamber. A plastic piston, slidable wit... | 03/14/2006 |
| 7005757 | Pneumatic human power conversion system based on children's play When large numbers of children play in a playground, part of the power of their play could be usefully harnessed resulting in large energy storage. This stored energy can then be converted for basic, low-power, applications in the school such as lighting, communicat... | 02/28/2006 |
| 6955330 | Deck securing system Exemplary embodiments provided herein include a deck securing system including an extension member, a securing member coupled to the extension member configured to move between a secured position and unsecured position, a receiving member springedly and/or telescopi... | 10/18/2005 |
| 6923751 | Ankle, leg and hip exercising device An ankle, leg and hip exercising device is disclosed which includes a parabolic-shaped base portion having a foot supporting and retaining portion at the upper end thereof. A plurality of pipe stubs are secured to the device which are adapted to receive weight suppo... | 08/02/2005 |
| 6656096 | Exercise method A method for strengthening coordination between a person's hand muscles and muscles of the lower part of a person's body involves (a) the person jumping into the air while holding a hanging article; and (b) placing while in the air the hanging article on ... | 12/02/2003 |
| 6572483 | Spinnable swing assembly A playswing assembly apparatus comprising a spinning wheel having a central housing with a hub therewithin, and an elongated shaft arranged through the hub. The shaft is attached to a first and a second support arm. The first and second support arms may b... | 06/03/2003 |
| 6361480 | Martial arts training device There is provided a martial arts training device for use by a martial arts practitioner to develop hand coordination, hand spacing, speed and timing in close quarter combat training exercises. The training device consists of two rigid rings held together ... | 03/26/2002 |
| 6302824 | Playground appliance A playground appliance comprising a plurality of support members from which are suspended net units to form a non-planar playing surface that children can climb. The support members include vertical posts supported on the ground by anchoring devices. Each... | 10/16/2001 |
| 5318491 | Multiple mode tug of war exercise machine A tug of war machine is described which includes a belt loop which is pulled in a generally horizontal direction. The resistance placed on the loop can be selected to either provide a static pull or a hand-over-hand tug of war-type pulling exercise. Addit... | 06/07/1994 |
| 5087037 | Pneumatically elevating recreational exercise device A pneumatically elevating recreational exercise device that utilizes in its preferred embodiment a commercially manufactured air cylinder (12) as an extendable air spring that is secured, or fixed to a horizontal surface or stand. A safety harness attachm... | 02/11/1992 |
| 4084814 | Gymnastic pole and mount therefor A gymnastic amusement device consisting of a pole mounted on a base. The base is adapted to receive a large pole or a small pole or a combination of the two poles, the smaller pole being insertable in the larger pole. The base has a resilient mount suppor... | 04/18/1978 |
