Abstract: The improved slip-type pliers tool includes a pair of jaw members that are arranged to permit pivotal movement therebetween. Mutually engageable surfaces are provided on the jaw members to limit the pivotal movement when the tool is in the closed position, to a position wherein the engaging surfaces on the jaw members are in generally parallel, spaced relationship. The tool also includes a ratchet dog located in a slot in one jaw member. The jaw member having the slot is provided with a series of teeth that mate with teeth provided on the ratchet dog. A cam located in the slot and connected to one of the jaw members is eccentric so that pivotal movement toward the open position of the tool causes the ratchet dog to become disengaged from the teeth on the jaw member permitting sliding adjustment of one jaw member relative to the other to open and close the space between the generally parallel engaging surfaces.

Abstract: The improved shaft support means described herein provides a means for resiliently supporting and damping the vibrations occurring in a shaft in a turbo-machine or the like. The bearings supporting the shaft are located in bores formed in the housing of the turbo-machine. The shaft is oriented in an horizontal directiion and the housing is split along a horizontal plane extending through the bore. The upper portion of the bore is provided with a groove that is formed on a centerline coincident with the centerline of the bore. The lower half of the bore is provided with a groove that is formed from a centerline located above the centerline of the bore so that the lower portion of the groove is of less depth than the groove of the upper portion of the bore. An O-ring or the like is disposed in the groove encircling the bearing.

Abstract: The valve described herein, includes a hollow valve body having inlet and outlet passageways extending into the body and a valve member positioned in the body for movement between open and closed positions. A plurality of orifice members are disposed between the inlet and the outlet so that fluid flowing through the valve must pass therethrough. The orifice members are arranged so that fluid flow from inlet to the outlet must follow a tortuous path through a series of orifices. The orifices are sized to restrict fluid flow and thus reduce the pressure as the fluid flows through the valve. Also, the relatively long tortuous flow path is provided so that the pressure is reduced over a considerable distance with as little noise as possible. The orifice members are arranged so that the inlet to each series of members is through an annular space that is narrower than the smallest of the orifices so that any particle passing through the annular space will pass through the valve.

Abstract: A muffler for reducing the noise level of the air exhaust from a governed pneumatic tool. Exhaust ports in the tool housing communicate with the interior cavity of a muffler body having selectively located port holes for discharging exhaust from the cavity to atmosphere. Contained in the muffler cavity is a foraminous baffle plate centrally supported in the path of discharge between the exhaust ports of the housing and the discharge ports of the muffler body. Extending about the baffle periphery are a plurality of bypass passages defining a flow path parallel to the baffle and sized to accommodate total air flow at maximum capacity.

Abstract: The control apparatus described is provided for the purpose of utilizing internal seals in the turbo-machinery for the purpose of adding additional stiffness to the shaft to raise the critical speed of the shaft-rotor system. The seals described are annular in configuration, closely surrounding the shaft of the turbo-machine and located inboard of the bearings supporting the shaft. The seals each include a face having an annular recess formed therein adjacent a radially oriented surface in the turbo-machine housing. A passageway extends through this face into fluid communication with the annular recess. The passageway is connected to a hydraulic system and is provided with a control valve so that the rate of fluid flow through the passageway can be varied. A small passageway extends through the seal body into the recess. The arrangement is such that fluid acts on one end of the seal body to force the seal face into frictional engagement with the radial face in the housing.

Abstract: The control valve described is a three-position valve that has been designed for use in decoking operations. The hollow body of the valve has been fitted with a sleeve that includes: a plurality of apertures adjacent the inlet of the valve that are arranged in communication with a first outlet; a second plurality of apertures that are spaced from the first apertures and arranged to be in communication with the second outlet of the valve; and, a plurality of relatively large perforations that extend through the sleeve and are located between the two sets of apertures and in communication with the first outlet. An elongated valve member is movably located within the sleeve. The valve member has a passageway extending therethrough so that when the valve member is in a first position, the fluid communicates from the inlet to the second outlet of the valve providing restricted flow permitting the pump connected therewith to continue to recirculate the fluid utilized in decoking through the second set of apertures.

Abstract: The improved hydraulically actuated percussion drill described hereinafter is designed to reciprocate a striker piston contained therein regardless of whether or not the striker piston engages the drill steel whereby vibration can be imparted to the drill. The drill includes an overtravel portion that cooperates with the striker piston to prevent metal-to-metal contact of the striker piston with the housing during operation. Means are provided to prevent the loss of fluid from the overtravel chamber whereby the striker piston will be returned to the upper end of its stroke and will not become stalled in the overtravel chamber.

Abstract: The disclosed safety latch is operable with automotive hoists that have a rack gear connected to and movable with the hoist piston. The piston, which carries the hoist superstructure, is disposed in a cylinder so that the piston telescopes to raise and lower the hoist in response to hydraulic or pneumatic pressure acting thereon. A pinion gear mounted on the latch is in engagement with the rack and, through a slip clutch mechanism, drives an operating lever that is connected with a latch dog for securely engaging the rack to prevent movement of the rack and the piston downwardly with respect to the cylinder. The latch operating mechanism can be operated manually to completely disengage the latch dog from the rack whereby the hoist may be lowered. The slip clutch mechanism is provided with a lost motion coupling member between the latch operating member and the latch dog so that the latch dog remains in engagement with the rack should the system for raising the hoist become inoperative.