Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7364395 | Snap ring design with anti-rotation structures at outer diameter This invention relates to a method of eliminating rotation of a snap ring, and more specifically, to an anti-rotation feature on the outer diameter of a gapped snap ring. The invention prevents rotation of the snap ring within the housing in which it is assembled. T... | 04/29/2008 |
| 7334607 | Protective cap for a sealing stopper in a collecting vessel of a condenser The invention relates to a protective cap (9) for sealing a collecting vessel of a condenser closed by means of a sealing stopper (4). ... | 02/26/2008 |
| 7171987 | Pipe fitting plug A reusable pipe fitting plug for temporarily sealing the open hub on a non-threaded female pipe fitting. The pipe fitting plug has a retainer with piercing edges, expandable pins or grit type particles designed to engage the inner portion of a pipe fitting hub in or... | 02/06/2007 |
| 7150596 | Toggle bolt device A fastener apparatus is disclosed that features projecting locking members that extend and retract when a central drive shaft is rotated. The exterior of the connector has a body that is partially threaded to receive a nut so that two structures (eg. flanges, panels... | 12/19/2006 |
| 7093733 | Cover activating device An activating device activates a cover for the opening face of a container. Pivot arms are fixed to a pivot unit equipped with an electric motor through a reduction gear at one ends, and fixed to plate springs at the other ends. One end portions of the plate springs... | 08/22/2006 |
| 7077610 | Toggle bolt device A toggle bolt type connector has projecting locking members that extend and retract when a central drive shaft is rotated. The exterior of the connector has a body that is partially threaded to receive a nut so that two structures (eg. flanges, panels, plates, beams... | 07/18/2006 |
| 6830095 | Casting mold plug A plug for sealing and resealing the passages for heating and cooling liquid in a casting mold. The plug includes a stainless steel socket head NPT plug which is screwed into the passage to seal it. Inboard of the plug there is mounted a resilient expandable silicon... | 12/14/2004 |
| 6076797 | Mold sealing plug An apparatus for blocking a hole, especially for blocking a passageway within a mold. The apparatus includes one or more tapered members received within recesses of an expandable sleeve. As the one or more tapered members are drawn within the sleeve by a ... | 06/20/2000 |
| 6044670 | Theft prevention device A theft prevention device is provided for an anhydrous ammonia tank having a feed pipe with an open end. The theft prevention device includes a plug body which is inserted into the open end of the feed pipe. The plug body includes a flexible member which ... | 04/04/2000 |
| 5740935 | Bung hole plug A bung hole plug formed of resilient synthetic material interfitted between a front and back plate. A threaded post is attached to the back plate, and used, in conjunction with a lock washer and nut, to draw the front and back plates together, thereby squ... | 04/21/1998 |
| 5660293 | Pressure plug apparatus with safety retainer unit A vessel pressure testing apparatus includes a safety retainer unit. An expanding plug unit is secured within a tubular outlet pipe of the vessel with a clamping bolt extending outwardly from an expanding rubber plug member. An attachment plate is secured... | 08/26/1997 |
| 5297691 | Closure plug and methods of employing the same to maintain a fire-rated barrier A closure plug consisting of opposing frusco-conical sections to apply lateral forces to axially compress and radially expand o-ring means to seal the plug within an opening through a fire-rated barrier may support or enclose insulating materials filling ... | 03/29/1994 |
| 5044403 | Dirt and moisture sealing pipe plug for sealing different size pipe A pipe plug of the type including a tie plate having a threaded bolt extending upward from a stepped circular base for mounted an elastic seal ring, a wedge ring and a cone permitting the cone to rotate on the threaded bolt to force the wedge ring to sque... | 09/03/1991 |
| 4693389 | Reactor internals core barrel hole plug A core barrel hole plug. A plug body sized to easily fit the hole to be plugged is slidably attached to a flange sized larger than the hole to limit the movement of the plug body into the hole. A rectangular bore at the inner end of the plug body has a pa... | 09/15/1987 |
| 4547242 | Autoclave for bonding composite lenses A small autoclave for bonding composite lenses comprising a cylindrical pressure vessel adapted to contain therein a lens tray for holding optical lenses aligned horizontally in a vertical array.... | 10/15/1985 |
| 4385643 | Plug for high-pressure testing of tubes In the embodiment shown, the Plug comprises an elongate body which has a throughgoing passage formed therein and an external ramp surface. A plurality of jaws are independently engaged with the body, and constrained thereon, for movement along the ramp su... | 05/31/1983 |
| 4282982 | Tube closure device A closure device which seals against the internal circumferential surface of a tube by an O-ring seal between a plug member and the circumferential surface and the plug being held in the tube by a plurality of segmented members that are positioned around ... | 08/11/1981 |
| 4209163 | Dump valve assembly A dump valve assembly for opening and fluid-tightly sealing the drain outlet of a waste tank, the assembly comprisng a rotatable elongated shaft having a handle at its upper end and a first or lower compression plate adjustably secured to its lower end. D... | 06/24/1980 |
