Abstract: A valve assembly for limiting the flow of fluid into and out of a chamber, consisting of: a valve seat in a wall of the chamber, wherein fluid flows into and out of the chamber through the valve seat; a valve face engaging the valve scat, wherein the valve face is external to the chamber; and a mechanism for moving the valve face toward and away from the valve seat wherein the valve face is substantially removed from the path of fluid flow through the valve seat when the valve face is moved away from the valve seat.

Abstract: A combination floor pad includes at least one base pad, and a plurality of composite base boards fixed on the base pad. Thus, the base boards can be securely locked in the base pad rigidly and stably, thereby preventing the base boards from being detached or loosened from the base pad. In addition, the base boards can be closely secured by the side ribs and the positioning ribs, so that dirt or dust is not deposited between the base boards easily, thereby facilitating the user cleaning the base boards.

Abstract: A pump includes a cylinder, a piston assembly, a first nozzle, a valve, a controller, a ring and a second nozzle. The cylinder defines first and second chambers and first and second channels for communication between the chambers. The piston assembly is received in the first chamber. The first nozzle defines a channel. The valve is received in the first chamber. The controller defines an axial channel and a radial channel communicated with the axial channel, and is received in the second chamber and linked to the valve through the second channel. The controller is movable between a first position for allowing the valve to seal the second channel and a second position for driving the valve to open the second channel. The ring is mounted on the controller so as to divide the second chamber into a first portion for communication between the first channel and the channel of the first nozzle and a second portion for communication between the second channel and the radial channel of the controller.

Abstract: A connector assembly for a memory module includes a body having two standing pivot seats and two fasteners pivotally connected to the two pivot seats respectively. Each standing pivot seat has two recessed guides and two through pivot holes communicating with two recessed guides. Each fastener has a front and rear wall. Each front and rear wall has a protruding detent and a pivot pin. The protruding detents and the pivot pins correspond to the two recessed guides respectively. The pivot pins are inserted into the two through pivot holes when the fastener is mounted in the standing pivot seat so the fastener can pivot in the standing pivot seat to easily mount the memory module. In addition, the protruding detents press against the two recessed guides to hold the position of the fastener in the standing pivot seat, so the fastener can securely hold the memory module.

Abstract: A spooling apparatus includes a housing, a spool received in the housing so that the spool can be rotated from an original position by an external force and automatically returned to the original position when released from the external force, a rope wound on the spool and a tension-controlling device received in the housing for controlling the tension of the rope in order to control the speed of the rope when wound back onto the spool. Furthermore, the spooling apparatus includes a braking device for slowing down the speed of the rope.

Abstract: A retractable/folding collapsible wrench is constructed to include a hollow handle, which can be made folding collapsible, two driving devices respectively moved in and out of the ends of the hollow handle between the extended position and the received position, and positioning means respectively mounted in the ends of the handle and adapted for securing the driving devices in one of a series of positions.

Abstract: A folder apparatus includes a folder, a holder for holding leaves and a connector for attaching the holder to the folder in a detachable manner. The holder includes a number of hooks formed thereon. The folder includes two covers and an intermediate panel interconnecting the covers. The connector is formed on the intermediate panel. In a first aspect, the holder includes a base attached to the intermediate panel in a detachable manner by means of the connector. The base includes two ends. The connector includes two clips formed on the intermediate panel for engagement with the ends of the base of the holder. In a second aspect, the connector is a hook-and-loop device.

Abstract: A retainer ring includes at least two holding sections and at least one engaging section. Each holding section has a radius of curvature equal to half of a diameter of a reduced section of a first object, e.g., an adaptor. The engaging section has a radius of curvature greater than that of the holding sections. The holding sections securely clamp the reduced section of the first object with the engaging section partially protruding out of the reduced section of the first object for engaging with a second object e.g., a box end of a wrench.

Abstract: A bi-directional ratchet wrench is constructed to include a wrench body having a box at one end, an annular ratchet wheel mounted in the box of the wrench body, a toothed stop member mounted in the box and meshed with the ratchet wheel, the ratchet wheel having an inside locating groove extended around an inside wall thereof and dividing the axially extended center through hole thereof into two coupling portions adapted for selectively coupling to the workpiece to be rotated, and a baffle plate axially slidably mounted in the inside locating groove of the ratchet wheel and adapted for holding down the workpiece to be rotated.

Abstract: A hand tool angle adjustment structure includes a handle having a substantially U-shaped front coupling portion with a through hole and a screw hole at two sides, a work head, the work head having a flat, circular coupling portion extended from a rear side thereof and coupled to the U-shaped front coupling portion of the handle and a mounting hole extended through two opposite lateral sides of the coupling portion, and a lock bolt inserted through the through hole of the handle and the mounting hole of the work head and threaded into the screw hole of the handle to secure the work head to the handle for enabling the work head to be tilted leftwards/rightwards or turned forwards/backwards within a limited angle.

Abstract: A carpet extractor (10) operable in either a restorative cleaning mode or a maintenance cleaning mode includes a constant rate pump (96) which dispenses clean solution through a manually operated valve (98) to one of two lines (100, 102) having nozzles which restrict dispensing to high and low solution flow rates. In the preferred form, clean solution is dispensed at the high flow rate directly upon the carpeted surface and at the low rate upon the agitating brush (88). When restorative cleaning is desired, the valve (98) is manually moved to dispense at the high flow rate and a switch (110) is also manually moved resulting in the chassis (18) being propelled at a slow working speed. When maintenance cleaning is desired, the valve (98) is manually moved to dispense at the low flow rate and the switch (110) is also manually moved resulting in the chassis (18) being propelled at a fast working speed.

Abstract: A tubular doorknob includes an inside bracket, an outside bracket and adjustment devices. The outside bracket has two connecting wings, two outside passages, two outside screw holes and an outside adjustment device. The connecting wings protrude from diametrically opposite sides of the outside bracket. The outside passages are defined through the connecting wings. The outside screw holes are defined through the outside bracket and communicate with the outside passages. The outside adjustment device has two sliding blocks and two adjustment screws. The sliding blocks are slidably mounted in the outside passages. The adjustment screws are screwed into the outside screw holes to push the sliding blocks to abut a surface in a doorknob hole in the door. The inside bracket has a configuration similar the outside adjustment device. The extended adjustment devices firmly hold the tubular doorknob in the doorknob hole.

Abstract: A mobile rack for hard disk drive has a removable cartridge with guiding rails, a pull back spring, a pivot block, a mounting bracket, and a driver door held by a pivot block. The driver door is set in with two base blocks, wherein each block contains a slider, wherein each slider is attached to a sliding plate for fitting against the corresponding sliding rails in the base block. Each slider has a latching pin extending out from the lateral side of the driver door to lock in the mobile rack. The pair of sliders is used to release the latching pins from the mounting bracket. When the driver door is opened outward, tension applied on the pull back spring automatically forces out the removable cartridge from the mounting bracket to make it easier to remove the hard disk drive from the computer.