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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 |
| 7293778 | Systems and methods for sealing between stators and rotors A seal is used between a housing and a shaft having an axis. The seal includes a first portion and a second portion engageable with each other and movable relative to each other. The first portion and the second portion are configured to be received in a cavity betw... | 11/13/2007 |
| 7219898 | Spring supported dual element face seal with a run surface sleeve The invention provides a seal for a rotatable shaft. The seal includes an inner case mountable to the shaft and having a body and first and second flanges extending radially outward from the body. The seal includes first and second sealing discs operable to seal aga... | 05/22/2007 |
| 7163449 | Hand held abrasive blaster A hand held abrasive blaster includes a tubular wand housing and an abrasives conduit which extends into the wand housing. The abrasives conduit includes a fixed portion at the rearward end and a rotatable portion at the forward end. A motor rotates the rotatable po... | 01/16/2007 |
| 6953195 | Sealing device A sealing device for a gap between two adjacent machine parts, including at least one inflatable, elastically stretchable tube, which is fitted into a groove in the sidewall of one of the machine parts, and which, when inflated, may, be positioned against a surface ... | 10/11/2005 |
| 6446975 | Seal arrangement The invention concerns a seal device for a submersible machine, such as a pump or a mixer. The seal device is designed as an easily replaceable unit comprising two mechanical face seals (4,6) and (5,7) resp. with an intermediate room for a barrier liquid ... | 09/10/2002 |
| 6398223 | Mechanical face seal A mechanical face seal comprising two seal rings for use in water pumps and other fluids, including a resilient bellows for providing a secondary seal between one seal ring and either a housing or a rotating shaft extending through an aperture in the hous... | 06/04/2002 |
| 6325382 | Non-contact type mechanical seal A static pressure non-contact type mechanical seal that exhibits and maintains a high sealing function or performance for a prolonged period even when sealing gases containing foreign matter such as oil. A labyrinth seal (7) comprising a plurality of annu... | 12/04/2001 |
| 5927722 | Mechanical seal A cartridge seal having a sleeve for fitting over a pump shaft and, at one end region of the sleeve, a stationary seal whose floating component is biased towards its static component. The cartridge further includes a member longitudinally spaced from the ... | 07/27/1999 |
| 5642888 | Temperature and pressure resistant rotating seal construction for a pump A seal construction is provided for sealing a rotating pump shaft against passage of a fluid along its central axis. The seal construction includes front and rear sealing flanges mounted coaxially to and rotatable with the pump shaft. Stationary engaging ... | 07/01/1997 |
| 5605436 | Centrifugal pump A centrifugal pump provided with an impeller, a pump shaft, a pump housing and with a motor coupled to the pump shaft. A shaft seal device is arranged between the pump shaft and the rear wall of the pump housing respectively, and a cooling unit mounted on... | 02/25/1997 |
| 5494299 | Temperature and pressure resistant rotating seal construction for a pump A seal construction is provided for sealing a rotating pump shaft against passage of a fluid along its central axis. The seal construction includes front and rear sealing flanges mounted coaxially to and rotatable with the pump shaft. A temperature stabil... | 02/27/1996 |
| 5484267 | Cooling device for a pump and corresponding barrier tank A centrifugal pump system including a pump having a rotating seal disposed therein, the temperature of the seal being substantially maintained at an acceptable level by circulating a temperature stabilizing liquid to and from a chamber arranged immediatel... | 01/16/1996 |
| 5454572 | Mechanical end face seal system An inner diameter pressurized mechanical end face seal includes at least one seal module with adjacent relatively rotating rings each having a radially extending face confronting the face of the other ring. At least one of the rings, preferably the rotati... | 10/03/1995 |
| 5333882 | Balanced mechanical seal assembly and flow ring therefor A mechanical seal assembly having dual seals in which the seal faces of the primary seal members remain essentially perpendicular to the shaft of the equipment being sealed regardless of any misalignment between the shaft and the equipment has a sleeve fo... | 08/02/1994 |
| 5312225 | Axially thrust-compensated turbo machine In a turbo machine with magnetic bearings on both sides and dry gas seals for the rotor, the axial thrust acting upon the rotor and generated by the pressure difference between the pressure side and the suction side is compensated for in that a dry gas se... | 05/17/1994 |
| 5251913 | Track roller for tracked vehicles Sealed roller, particularly for tracked vehicles, including a supporting shaft which is inserted with a tight fit in respective blind bushes preset for fixing to a supporting structure, and a roller body rotatably supported about the shaft.... | 10/12/1993 |
| 5246087 | Device for radially transporting a medium to a rotating station A device for sealingly transporting medium, for instance lubricating oil, from a source to a receiving station rotatably movable relative thereto, which device comprises: a source for the medium; and a rotation bearing assembly comprising: at least one ro... | 09/21/1993 |
| 5009437 | Mechanical face seal including two diaphragms surrounding a gland plate A seal for providing a fluid tight seal between a pair of relatively rotatable components has a first seal face member mounted in fixed axial and rotational relationship and sealed with respect to one component and a second seal face member sealed with re... | 04/23/1991 |
| 4958942 | Oil seal assembly An oil seal assembly has an inner annular member and an outer annular member which can rotate relative to each other and are disposed concentrically with each other to have a certain distance from each other in the radial direction. An elastic annular sea... | 09/25/1990 |
| 4687350 | Sealed bearing for ring roller of cold pilger rolling mill A sealed bearing arrangement for the ring rollers of a cold rolling mill is provided with a rolling bearing mounted on a journal of a rolling shaft and seated in the bore of a chock, and a pair of housing covers fastened to said chock on respective sides ... | 08/18/1987 |
| 4669738 | Internally installable package seal A package seal particularly suited to pumps or other applications having a drive shaft which terminates internally of a housing at its connection to the impeller or fluid working element. In such an apparatus partial disassembly of the components provides... | 06/02/1987 |
| 4634134 | Mechanical seal A mechanical seal apparatus for use between a wall and a shaft extending through an opening in said wall with relative rotation occurring therebetween. The shaft extends from a first region at a first pressure into the opening in the wall and a second reg... | 01/06/1987 |
| 4629196 | Coupler and manifold assembly with differential vacuum seal means A coupler and manifold assembly which makes it possible to turn the shaft and impellers of an absorption chiller circulating pump with an external drive means instead of a hermatically sealed drive means, comprising an interconnecting combination of a plu... | 12/16/1986 |
| 4537385 | Low emission valve A low emission valve assembly for use with volatile fluids and incorporating a pair of independent inner and outer metal bellows mechanical seal assemblies with means to compensate for thermal expansion of a liquid between the seals and which means transm... | 08/27/1985 |
| 4522410 | Axle or shaft seal with overlapping ring extension members An axle or shaft seal has inner and outer sealing rings for respective fixed connection to the axle or shaft and a structure thereabout with respect to which the axle or shaft is relatively rotatable axially. Each of the inner and outer rings has a pair o... | 06/11/1985 |
| 4515377 | Rotary seal assembly having a liquid filled bellows A rotary seal assembly for sealing a rotating shaft, such as the shaft of a centrifugal pump. The assembly has a first sealing element fast on the shaft and a second sealing element arranged non-rotatably but axially movably next to the first element. On ... | 05/07/1985 |
| 4501429 | Mechanical seal flush agitator and wear monitor for mechanical seals A mechanical seal includes a drive sleeve on a rotating shaft having a flush agitator thereon. The flush agitator includes a fluid contacting surface that is in the form of a non-directional trisymmetric sine wave and creates particle movement away from t... | 02/26/1985 |
| 4467701 | Expansible device An expansible device for exerting force which has a generally "S" shape cross-section, being formed by stepped diameter cylinder, and arrangements using such a device are disclosed. The device may exert sealing forces and be controlled by admission of flu... | 08/28/1984 |
| 4443015 | Cartridge type rotary shaft seal with bearings and bellows A cartridge type assembly is provided for use in conjunction with a housing wall having an opening thereof through which a rotary shaft projects. The assembly includes an inner bearing race supporting sleeve which is axially removably slidable, sealed rel... | 04/17/1984 |
| 4377290 | Symmetrical seal package for multiple face seals A symmetrical package seal containing two balanced end face seals, the stationary components being adapted for use with shafts of different sizes. In addition, the package seal has means for centering the rotating components relative to the stationary com... | 03/22/1983 |
| 4183540 | Mechanical shaft seal A mechanical shaft seal for sealing the space between a stationary element and a rotating element in order to separate an inner pressure medium space from an external space, preferably the atmosphere. The seal comprises a sealing ring mounted on one of th... | 01/15/1980 |
| 4133541 | Seal According to embodiments shown, the novel oil seals employ tilting pads, such as are used in bearing practices, to avoid or reduce the cross-coupled stiffness of cylindrical, hydrodynamic bearings. The tilting pads and cooperative grooved, sealing lands a... | 01/09/1979 |
| 4108569 | Lubricated mechanical seals for pumps In a rotodynamic pump intended for operation at high pressures e.g. 2000 p.s.i. and for pumping contaminated fluids e.g. corrosive water, high pressure sealing assemblies are provided at the through-openings in the pump casing for the pump shaft. Each ass... | 08/22/1978 |
| 3985365 | Remotely actuated emergency shaft seal Disclosed is an emergency shaft seal for remote actuation in the event the primary shaft seal fails. The emergency shaft seal includes a seal housing rotatably mounted on an element rotatable with the shaft. At least one end face seal is carried by and ro... | 10/12/1976 |
| 3985366 | Duo-cone seal flexible mounting A seal assembly has a pair of duo-cone seals positioned by a like pair of torics for axial loading. An insert member of flexible material is located within the member defining one of a pair of confronting inclined surfaces operatively containing the toric... | 10/12/1976 |
| 3967674 | Sealing structure for a machine for centrifugally casting pipes and machine including said structure The sealing structure comprises an annular sealing member disposed in an annular recess in a ring fixed to the non-rotating casing of a centrifugal casting machine. The sealing member bears sealingly against an annular radial flange connected to rotate wi... | 07/06/1976 |
