Abstract: A tube fitting of the push-pull type wherein the tube end is connected to the fitting by a simple inward insertion thereof, and withdrawal of the tube is effected by a simple withdrawal movement thereof upon manual rearrangement of the fitting components. The fitting includes a spring finger locking element adapted to engage the tube end when inserted and effectively prevent outward axial withdrawal movement of the tube end. A manipulating device is provided for selectively disengaging the spring finger from the tube end to permit axial withdrawal of the tube end when desired. The disengaging device is a one-piece element and is associated with suitable seals for providing an accurately preselected prestressing thereof against the tube end and body to provide an improved seal of the tube end to the body. The spring fingers are defined by an annular element.

Abstract: A hydraulic impact tool providing improved force absorption for facilitated manipulation by an operator. In the illustrated embodiment, the tool comprises a tamper which provides substantial tamping force with minimum vibration and uncontrolled bounce. The tool utilizes a hydraulic power system for improved noise reduction and minimizaton of fatigue. The tool provides a forward stroke wherein the force is applied for a preselected time, and a retraction stroke wherein the moving elements are retracted to a preselected position. The tool is adapted for use with a wide range of load resistances.

Abstract: A one-piece nut and sleeve coupling element is provided with an improved frangible connector for effective and reliable shearing of the sleeve member. An interior shear groove is flanked by exterior shear grooves to define a pair of break point webs, one web becoming thinner as the other web is widened upon axial displacement of the interior shear groove from a preselected placement. A shearable break point web is therefore assured when making up a tube fitting utilizing such a one-piece nut and sleeve coupling element.

Abstract: A fluid coupling having an improved adjustable valve core depressor for effecting the opening of a normally closed valve in a connector portion of the coupling as a result of the connection of the connector portion to a body portion of the coupling in making up the fitting. The depressor is threadedly mounted to the coupling body and is provided with a locking portion adjustably retaining the depressor in adjusted position for improved controlled depressing of the connector valve in the make-up of the fitting.

Abstract: A method of forming hose construction utilizing an aromatic polyester thermoplastic core and reinforcing means mechanically bonded about the core with the core portion in which the reinforcing means is embedded being substantially free of stress. A sheath may be provided about the reinforcing means and may be autogenously bonded to "Hytrel", an aromatic polyester thermoplastic body of material coating the reinforcing means.

Abstract: A clamp-on valve structure for use in dispensing pressurized fluid from a can having an annular projecting lip. The valve structure includes mounting structure having a manipulatable portion which is effectively locked to prevent removal of the valve structure from the can with the valve installed on the mounting structure.

Abstract: A manually operable tool, such as a tube cutter, having a working element carried on a carrier adjustably positioned on a mounting element. An improved arrangement of threaded advancing structure and selectively positionable pawl structure is provided to permit automatic release of the pawl at opposite ends of travel of the carrier for facilitated use of the tool. Automatic release of the pawl is effected by means of the provision of spaces at the opposite ends of the carrier thread permitting a biasing spring to reposition the pawl suitably for quick, nonthreading reverse movement.

Abstract: An improved hose construction and method of forming the same wherein a reinforcement layer is bonded to a thermoplastic core by a solventless bonding layer defining an inner thermal weld portion substantially autogenous with the outer surface portion of the core tube and an outer portion mechanically interlocked with the confronting inner portion of the reinforcement layer.The bonding layer is thermally formed to be autogenous with the outer surface portion of the core tube and may include an added layer of thermoplastic material which is concurrently fused to define the fused bonding layer. The added layer is compatible with the core tube outer surface portion and is preferably formed of similar thermoplastic material. The reinforcement layer is wrapped about the core tube under tension to provide an embedment thereof in the bonding layer to effect a positive mechanical interlocking therebetween.

Abstract: An adjustable ratchet wrench adapted for one-hand manipulation in originally engaging an element to be turned, and subsequently effecting a ratchet action in turning the element wherein the jaws of the wrench are caused to grip the element when the wrench is swung in a first direction and release the element when the wrench is swung in the opposite direction. The mechanism for adjusting the jaws is further arranged to prevent overtightening of the jaws which could otherwise prevent the desired ratcheting action in the subsequent turning of the element. The jaw adjusting mechanism includes a ratchet and manual operating structure permitting free movement of the jaws to the element-engaging disposition and subsequent releasable locking of the jaws in such disposition to provide the improved ratcheting action in turning the element.

Abstract: A fitting for use with metal tubes adapted for critical applications such as involving high pressure and/or elevated temperatures for heavy external loads. The fitting includes a sleeve which is sealingly welded to the tube end and defines an improved cooperative nut and sleeve structure whereby the nut may be threadedly withdrawn from the body notwithstanding the projection of the sealing weld sufficiently from the tube to prevent complete withdrawal of the nut from the sleeve.