Abstract: A flexible, highly portable pump is designed for volleyball players but has wider applications. Motive force is delivered from a squeezebulb having a check valve at each end and communicating downstream to a fitting which will accept a ball inflation needle. A deflation valve is located in the air passageway downstream from the squeezebulb outlet check valve. The pump is designed so that it can be stuffed into a back pocket or thrown in a sports bag, and is flexible enough to be bent in two or wadded up and stuffed anywhere. The squeezebulb and relief valve are adapted for one-handed operation, and an optional one-piece solid state pressure gauge can be integrated into the body of the pump.

Abstract: An air controller for an air pump capable of simply regulating the air delivery rate of the air pump. In an air pump including an electromagnetic driving mechanism 11, 13, 14, a magnet 17 carried on the tip of an arm 16, and a diaphragm 18 connected to the intermediate portion of the arm, the magnet being reciprocated by an electromagnetic action exerted between the electromagnetic driving mechanism and the magnet, the intake and discharge action being effected by the expansion and contraction of the diaphragm, the improvement lies in that the electromagnetic driving mechanism is mounted on a housing in such a manner that it is capable of advancing and retreating with respect to the magnet, whereby the advancement and retreat of the electromagnetic driving mechanism will cause the distance between the core 13 and magnet 17 and hence the reciprocating rate of the magnet to change, thus accomplishing the change of the air delivery rate.

Abstract: A hermetic compressor for use in refrigeration systems is provided. The hermetic compressor includes a compressor unit disposed within an enclosed compressor casing. The compressor unit has a compression chamber and a valve assembly having an inlet port arranged to introduce refrigerant into the compression chamber and an outlet port for discharging the refrigerant compressed in the compression chamber. The valve assembly includes a valve plate, a single outlet reed valve, and a spring member. The valve plate has formed therein a recessed portion in which the outlet port is formed. The outlet reed valve has a supporting portion and a valve portion for selectively opening and closing the outlet port according to a pressure level of the refrigerant compressed in the compression chamber. The recessed portion has protrusions to define an outlet reed valve housing in which the supporting portion of the valve portion of the outlet reed valve is secured.

Abstract: A mechanical shift pilot valve is provided with lost motion response to accommodate slight piston reversals at travel limits to prevent a false shift signal related thereto.

Abstract: The pump is formed by a body having a cavity with a cylindrical chamber in which a piston is reciprocated toward and away from an inlet and outlet aperture. A crank shaft extends through an aperture formed through the piston transverse to its axis and through opposite walls of the cavity. The crank shaft has a cam located in the piston aperture. Upon rotation of the crank shaft, the cam alternately engages opposite facing cam surfaces of the piston in the piston aperture to reciprocate the piston to draw fluid into the chamber from an inlet path and then to pump the fluid out through an outlet path. The piston has spaced apart O-rings on its outer wall which engage the chamber wall upon reciprocation of the piston.

Abstract: A pneumatic pump of the type having a pair of pump chambers each divided by a diaphragm assembly coupled by a main shaft includes a housing having a central valve chamber. The valve chamber is provided with a pair of internal walls between which a valve body reciprocates. The valve body alternatively connects passageways from the pump chambers to the pump exterior, while pressurized gas supplied to the valve chamber simulataneously pressurizes the other pump chamber. The valve body is mechanically coupled to the diaphragm shaft, whereby the pump chambers are pressurized and evacuated on synchronism with diaphragm operation. The valve body is accessible through an aperture in the housing, allowing the body to be replaced without pump disassembly. An integral counter, mounted in the pump housing, is also coupled to the diaphragm shaft, and provides a count of the number of shaft reciprocations performed.

Abstract: A grease pumping assembly includes a drum for receiving grease therein, the drum has a central hole defined in a bottom thereof and is disposed to a base, the base having a first recess, a second recess and a second hole defined therein, the first recess communicating with the central hole of the drum and a motor disposed with the second recess, a first hole defined in the base and communicating with the first recess, a bottom plate disposed to a bottom of the base and the bottom plate having a reduction device disposed therein which is engaged to the motor and the reduction device having an eccentric rod inserted into the second hole of the base for being engaged to a pushing rod, the pushing rod movably disposed between the second hole and the first recess such that the grease drops into the first recess via the central hole of the drum and is pumped by the pushing rod through a first hole defined in the base to a grease gun.

Abstract: Close tolerance, oil free scroll type vacuum pumps, when run at RPM speeds in excess of 1800 RPM, prevent pump exhaust outlet to pump vacuum inlet back diffusion (backwards migration) of light atmospheric gases from a process vacuum is useful in a number of vacuum applications. The light gas isolation capability of the invention scroll type vacuum pumps is due to the close tolerance pumping mechanism that these pumps employ, the RPM speed that the mechanism is operated at, and the absence of light gas absorbing materials inside the pump such as oil.

Abstract: An upright L- or U-shaped separating container with a pump unit mounted on the horizontal part thereof. The separating container is provided with an inlet opening towards its bottom and an outlet opening towards its top. The pump unit is comprised of a cooled drive motor connected to a liquid ring pump. The liquid ring pump is comprised of a center shaft, an intake stub, and an output stub. The output stub of the liquid ring pump is connected to the inlet opening of the separating container. At least part of the separating container extends below the center shaft of the liquid ring pump of the pump unit.

Abstract: A holderless hose clip, primarily for use in preventing piping hoses from falling off of connecting pipes in automotive vehicles, includes a clip body formed of a leaf spring having the shape of an annular band and which clamps the hose when released from a spread-diameter state to assume a free state. A pair of grip strips are formed by bending the ends of the clip body, respectively. An engagement claw and an engagement recess are formed on the respective grip strips to secure the grip strips to each other when the grip strips are gripped, so that the clip body is held in the spread-diameter state. The engagement claw has a guide face for guiding the grip strips axially of the clip body when the grip strips are gripped whereupon the engagement claw is received in the recess.

Abstract: A fluid pump 20 used in a lavage instrument 10 that is driven by vacuum pressure is disclosed. Fluid pump 20 includes a fluid housing 30 connected to an external fluid source and a pneumatic cylinder 50 connected to an external vacuum source. A diaphragm 40 is shiftably disposed within fluid housing 30 to define an inner fluid chamber 31. Pneumatic cylinder 50 includes a cylinder casing 60 and a reciprocating piston 70, which defines a vacuum chamber 61. Piston 70 includes a poppet valve 80 and is connected to diaphragm 40 by two push rods 68. Negative pressure within vacuum chamber 61 draws piston 70 forward and compresses a return spring 67. As piston 70 is drawn forward, piston 70 pushes diaphragm 40 forward to expel fluid from fluid chamber 31 through an outlet port 36. Piston 70 is drawn forward until poppet valve 80 is unseated by its engagement with a post 66 which extends longitudinally from casing end wall 44.

Abstract: A vacuum pump for removing air from containers includes a pump housing in the form of a conduit with an open end and a closed end. A piston in the form of a conduit, open at each end, is slidably mounted within the housing, and has an inside end within the housing and an outside end protruding from the housing. The outside end of the piston is adapted to fit over a valve secured to the container. A piston ring is provided substantially at the inside end of the piston. The piston ring is adapted to mate tightly with an interior surface of the housing, such that movement of the housing away from the outside end of the piston will draw a vacuum through the valve to remove air from the container through the valve. A system and method for removing air from containers is also disclosed.

Abstract: This pumping unit stroke reversal invention can be employed in various embodiments, and uses one or more resilient hydraulic-pneumatic accumulators which slow and stop each stoke, storing the kinetic energy, and returning this energy to begin and accelerate the next succeeding stroke. This storing and re-application of energy greatly increases the efficiency of any pumping unit which incorporates the stroke reversal system of this invention. Counterbalance force is mechanical, hydraulic-pneumatic, or a combination of the two, and is applied in linear or rotary fashion. Drive power is applied during the larger central portion of each stroke, either mechanically or hydraulicly, and in either linear or rotary fashion, and the drive mechanism is then passive during the remaining, reversal portions of the stroke cycle.

Abstract: A footrest for relieving back pain and fatigue. The subject footrest has a generally convex surface which permits a sitting or standing user thereof to safely and stably place a foot thereon in a multiplicity of positions. Various heights thereof may be employed to achieve the desired result. Construction using compressible materials at the location of contact between the foot and footrest enhances user comfort.

Abstract: Disclosed is an assembly for unseating a seated traveling valve ball, and pumps utilizing such an assembly. The assembly generally includes a tubular member having therein a piston with an actuator for engaging the ball. Mechanical advantage is provided either by providing a sealing area of the piston that is greater than the sealing area of the seat valve and/or by providing a engaging member suitable to strike to seated ball asymetrically with respect to the vertical axis through the center line of the ball.

Abstract: A liquid pump comprises an insulated cylinder which is provided with a top seat and a bottom seat. The top seat is provided with a liquid inlet while the bottom seat is provided with a liquid outlet. A piston rod is fastened with the top seat and is provided at the bottom thereof with a one-way piston valve device capable of creating a vacuum in an upper chamber of the cylinder. The bottom seat comprises a receiving space in which a one-way valve device is disposed. The liquid contained in a vessel is drawn up by suction via the liquid inlet. The liquid so drawn up is discharged via the liquid outlet.

Abstract: A brake fluid pressure controller including a hydraulic unit having a housing and a pump mounted in the housing, and a motor for the pump having an end cover and an output shaft received in a hole formed in the housing. The motor is coupled to the housing by means of a plurality of bolts extending through the end cover of the motor and threaded into the housing. A seal member is sandwiched between opposing surfaces of the motor and the housing to seal the space around the output shaft and the space around each bolt. The seal member is in the form of a rubber packing including a large-diameter annular seal portion surrounding the output shaft and small-diameter annular seal portions integrally formed along the outer edge of the large-diameter annular seal portion.

Abstract: A pumping device is provided for pumping fluid from an inlet to an outlet. The pump comprises a piston reciprocable between an inlet chamber and an outlet chamber, a first valve between the inlet and the inlet chamber and responsive to reciprocation of the piston in a first direction to communicate the inlet to the inlet chamber, and a second valve between the inlet chamber and the outlet chamber responsive to reciprocation of the piston in a second direction to communicate the inlet chamber to the outlet chamber, whereby fluid is received in the inlet chamber when the piston reciprocates in the first direction and pumped from the outlet chamber when the piston reciprocates in either direction. Also provided is a pump assembly for pumping fluid for an anti-lock braking system. The pump assembly is a dual action pump including two pistons which are stroked 90.degree. out of phase with respect to each other by a common drive member.

Abstract: An apparatus for pumping liquids to a destination includes a pipe of a first cross-sectional area extending from the liquid to be pumped to the destination. A body having a cross-sectional area less than twice the first cross-sectional area also has an upper portion, a lower portion, an inlet in the upper portion and an outlet to the pipe in the lower portion, a gas injection port, and a normally open valve between the gas injection port and the inlet, closeable upon an injection of gas through the gas injection port. Gas injection apparatus injects gas through the gas injection port from time to time. When no gas is being injected, liquid may enter the upper portion of the body through the inlet and fall by gravity toward the outlet in the lower portion and the pipe. Upon injection of gas, the valve closes, trapping liquid in the body below the valve, and trapped liquid is forced out the outlet and into the pipe toward the destination.

Abstract: An improved sampling pump has utility for withdrawing contaminated fluid from a low pressure source and outputting cleaned fluid to a sampling container. The fluid pump assembly of the present invention includes an operator unit for reciprocating plunger, and a side body port positioned within the pump body for receiving a removable filter. The pump assembly includes a discharge check valve which is ideally positioned within the pump body for minimizing "dead areas" within the pump, but is also adjustable for controlling the downstream pressure generated by the pump. An operator unit for the pumping assembly may include a spacer attached to the operator piston for selectively controlling the pump stroke. The pump assembly preferably has a pump body inlet port substantially aligned with the plunger axis. High pump reliability is obtained by the preferred filtering technique which cleans both the fluid supplied to the pump and the fluid supplied to the operator unit.