The pneumatically operated projectile launching device is preferably comprised of three principal elements: a body which houses and interconnects all of the pneumatic components and also houses the electrical power source, a grip mounted to the body which includes an electrical switch that activates a launching sequence, and an electrical control unit housed within both the body and the grip which directs flow between the pneumatic components to load, cock and fire the gun. The body preferably c...

A mechanical end face seal for sealing between a housing and a relatively rotating shaft which seal includes a pair of relatively rotating annular rings having seal faces in sealing contact with each other to define a seal interface, with one of the rings adapted to be secured to said shaft for rotation therewith, and the other fixed relative to the housing and one being axially movable toward the other. A generally annular flexible metal diaphragm secured between the axially movable ring and ei...

Quick release lock mechanisms for releasably connecting an extension pole to a tool handle include an adaptor attached to an end of the extension pole having a smooth cylindrical outer end portion axially slidable into and out of an internally threaded bore in the tool handle. A bearing support is provided for the cylindrical outer end portion when fully inserted into the bore. Also, a non-rotatable connection is provided between the adaptor and tool handle when the cylindrical outer end portion...

A supporting wheel substitute or track drive conversion apparatus is connectible to a driven wheel of a vehicle having a support frame. A frame is pivotally connectible to the support frame of the vehicle for movement in a vertical plane relative to the support frame of the vehicle. An end wheel is positionable spaced longitudinally from the driven wheel of the vehicle along the frame. Adjustable members selectively secure the end wheel in various longitudinal positions along the frame with resp...

A truck strap fastener is adapted to enable a strap to be attached to either a downwardly directed hook or to a flat iron carried by standoffs attached to a trailer's frame. Flatbed trailers typically provide either a flat iron bar or a downwardly directed hook as the point of attachment for load securing tie-down straps. A fastener is disclosed that is adapted to attach to either point of attachment, and also to the tie-down strap. The fastener provides a body carrying left and right prongs whi...

A sealing device for a drive line slip yoke includes a generally resilient seal and a substantially rigid cover that cooperate to provide a fluid-tight seal at the interface between a slip yoke and an axially moving splined shaft. The seal has a mounting portion that includes a shoulder received within a groove defined on an outer surface of the slip yoke. The cover is snapped over the seal and maintained in position by cooperating tabs on the cover and a groove defined on an outer surface of th...

A propeller shaft including an FRP tube and joints connected to at least one end of said FRP tube. The FRP tube includes cylindrical end portions into which cylindrical portions of the joints are press-fitted, and intermediate tubular portions which have tapered inner peripheral surfaces connected at their large-diameter ends to terminal ends of inner peripheral surfaces of the cylindrical end portions and which are formed by a helical winding. The intermediate tubular portion is formed as a por...

A buckling device used in conjunction with a strap for holding an object firmly in position is provided. The buckling device includes a male fastener and a female fastener. The male fastener includes a strap-mounting body for fixing a first end of the strap thereto and a tongue-like member formed on the strap-mounting body. The female fastener includes a rectangular body having a hollowed inside and formed with an insertion hole; a locking/releasing piece pivotally mounted on the rectangular bod...

A twin mass flywheel comprising two co-axially arranged flywheel masses which are mounted for limited angular rotation in a drive and over-run direction relative to each other, and a plurality of pivotal linkages. Each pivotal linkage comprises a first link pivotally connected to one of the flywheel masses, a second link pivotally connected to the other of the flywheel masses and a pivot pivotally connecting the first and second links. The action of the links controls relative rotation of the fl...

An implement holder to be attached to a cap or hat is provided. The holder is designed to be affixed to the side portion of the cap proximal the edge. The holder is an integral unit including a first leg, second leg and third leg. The first leg and the second leg are interconnected to form a first jaw or clamp, the first leg to be received between the cap and the head and the second leg to remain outside and flush to the cap. The first leg is resilient and includes means to maintain attachment t...