Abstract: An anti-back flow vacuum breaker valve that includes a valve body having a cylindrical internal chamber having an upper portion and a reduced diameter lower portion forming a horizontal valve seat, and having an inlet communicating with the chamber on the underside of the valve seat, and having an outlet communicating with the chamber on the over side of the valve seat. A ball is positioned within the internal chamber for sealing the inlet of the valve body. A valve cap having a lower portion mating with the upper portion of the valve body sealed and securely attached to the valve body, and having an internal conical chamber having a central vertical journal therein, forming a journal vent with a vent seat at the lower end thereof aligned with the valve seat of the body.

Abstract: A first embodiment of the security apparatus comprises a retaining collar; a plurality of segments forming a generally frusta-conical enclosure, with one or more of the segments having an access opening therein; and a lockable access door covering the opening. The retaining collar is separable into portions that conforms to the shape of the periphery and are coupled together around the structure. The segments have an upper portion that attaches to the collar; and have a bottom portion that extends radically downwardly from the collar at an angle of about 30 degree; with the radial edges interconnected forming the enclosure. A second embodiment of the apparatus secures a ladder supported on a wall and a retaining bar; a plurality of segments forming a generally semi-frusta-conical enclosure, with one or more of the segments having an access opening therein; and a lockable access door covering the opening.

Abstract: A hydraulic floor jack has a tubular handle with a yoke at the distal end thereof with lateral axels pivotally attached to a pair of vertical side brackets. One side brackets has a series of arcuate upper surfaces concentric with the lateral axel of the yoke, including a large radius forward portion, then a small radius arcuate notch portion, then an intermediate radius rearward portion. The yoke has a barrel aligned radially over the circular upper surfaces of the side bracket, with a plunger therein having an upper end extending above the barrel and a lower end for extending below the barrel and into the arcuate notch portion. A plunger control level has a rectangular distal end that is pivotally attached to the upper end of the plunger.

Abstract: A two-position lift bridge is used with a jack-stand power unit including a forward end, a rearward end, a pair of upward side flanges, with the rearward end having a hydraulic cylinder. A rear cover plate extends horizontally from the side flanges and over the cylinder, and has vertical apertures for positioning the lift bridge, and has a threaded vertical aperture for securing the lift bridge. The frame has a pair of parallel lift arms having forward end that are extendable by the cylinder. Each forward end has a leveling pad pivotally attached having an outwardly extended flange, and one having a vertical aperture and a threaded aperture. The lift bridge includes a rectangular plate one side having downward extending corner flanges with horizontal openings for engaging one of the outwardly extended flanges of the leveling pad.

Abstract: A two part jack system includes a power unit having a generally rectangular frame with a forward end, a rearward end, a pair of longitudinal side flanges that extend upward therefrom, and a rear cover that extends from the side flanges at the rearward end of the frame. A lifting mechanism mounted on the frame includes a pair of parallel lift arms having forward ends thereon each having a leveling pad pivotally attached to the outer side thereof. A two-position lift bridge includes a rectangular plate having a forward end, a rearward end, an upper surface, a bottom surface and a pair of sides. The bridge is for being positioned laterally and horizontally on the leveling pads at the forward ends of the lift arms, whereby the power unit is operable for use as a load lifting jack. The bridge is alternatively for being positioned on the rear cover of the power unit, whereby the power unit is operable for use with a jack stand.

Abstract: A power unit includes a rectangular frame base having a left shoe and a right shoe having a longitudinal track on their inner sides, a forward end having a support plate for receiving a jack stand, and a rearward end having a rear plate with an aperture for receiving an actuator shaft. A screw-threaded actuator shaft has a distal portion, and a proximal end extending through the aperture of the rear plate. A lateral screw axel has a threaded aperture receiving the distal end of the actuator shaft, and has its ends extending into the respective left and right track of the shoes. Two parallel lift arms have forward ends, and have rearward ends pivotally attached to the lateral axel. Two parallel connecting arms have forward ends pivotally attached to the forward ends of the shoes, and have rearward ends pivotally attached on the lift arms. Leveling pads are pivotally attached to the forward ends of the lift arms.

Abstract: A jack stand is for use with a power unit. The power unit includes a rectangular frame and a pair of parallel lift arms having forward ends extendable vertically over the frame. The forward ends of each lift arm have a frusta-conical disc pivotally attached to the inner sides thereof, so that the upper surface of the disc inclines upwardly at an acute angle. The jack stand includes a base plate with a first tubular frame attached thereto and extending vertically therefrom. An upper tubular frame is positioned in telescoping relationship relative to the first tubular frame and has a rectangular lifting plate attached to the upper end thereof. The lifting plate has parallel sides with flanges extending downwardly, with the lower ends of the flanges having an acute angle for engaging the upper surface of the frusta-conical discs of the power unit.

Abstract: A handle and control mechanism on a mobile power unit for positioning extending, retracting and extracting a jack stand. The jack stand includes an alignment hole and a pair of ratchet release arms at the lower sides. The power unit includes a frame having a forward end with separated extensions for supporting the jack stand, and a rearward end having a tubular handle with a T bar hand grip with an operating lever on the right side. The handle has a rotatable control knob extending through the T bar hand grip for controlling a valve on a hydraulic cylinder. The forward extensions have an alignment block and pin for engaging the alignment hole of the stand. A pair of rectangular flippers are pivotally mounted at the inner rearward corners of the pin blocks, and have the outer rearward corners linked to the operating lever.

Abstract: An extendible jack stand comprises first, second, and third vertical frames arranged in telescoping relationship. A locking mechanism includes an upwardly extending finger fixedly secured to an outer surface of the upper end of the first frame. A guide member is secured to the upper end of the second frame and extends horizontally outward. A latch member is slideable within the guide member and has a slotted opening therein for receiving the finger, with springs urging the latching member inward. When the third frame is fully extended, the latch member is urged into a groove in the third frame and permits the second frame to be extended. The upper end of the finger has an outward surface that inclined at about 32° for sliding the latch member outward along the guide member. The inward surface then inclines at an angle of about 45°. The inward surface further extends inclined at an angle of about 23.

Abstract: A hydraulic floor jack includes a rectangular frame with side flanges and having an extended control handle with a control lever. A pivotal lifting mechanism is mounted on the frame including a pair of parallel lift arms having rearward ends interconnected by a lateral push bar. The forward ends of the lift arms are pivotable upward for lifting a load as the push bar is translated forward within a pair of longitudinal “U” channel tracks attached to the inner side flanges. A hydraulic cylinder is secured at the rearward end of the frame for pushing the lateral push bar forward, and for releasing the lateral push bar rearward along the tracks. The safety mechanism includes a toothed rack bar secured on the vertical wall of the tracks. The lateral push bar has bore holes in the ends thereof. A cylindrical dog is slidably supported within each of the bore holes and has a distal end that is extendable for engaging a tooth of the rack bar.

Abstract: A trunk jack includes a rectangular frame base having a left shoe and a right shoe having a longitudinal track on their inner sides, a forward end has a support plate, and a rearward end has a rear plate with an aperture for receiving an actuator shaft. A screw-threaded actuator shaft has a distal portion, and a proximal end extending through the aperture of the rear plate. A lateral screw axel has a threaded aperture receiving the distal end of the actuator shaft, and has its ends extending into the respective left and right track of the shoes. Two parallel lift arms have forward ends, and have rearward ends pivotally attached to the lateral axel. Two connecting arms have forward ends pivotally attached to the forward ends of the shoes, and have rearward ends pivotally attached on the middle of the lift arms. A lifting plate is pivotally attached to the forward ends of the lift arms.

Abstract: An automatic-slide-forward-lift bridge for use with a jack stand power unit. The power unit has a rectangular frame base and a pair of parallel lift arms with forward ends for raising and lowering the jack stand. The lift arms have leveling pads attached to the forward ends. Each leveling pad includes a rectangular plate oriented vertically having a rearward edge and an upper surface with a flange extending outward for use with the lift bridge, and for use with a compression spring mechanism for biasing the bridge toward the forward ends of the lift arms. The lift bridge comprises a rectangular plate having an upper surface, a bottom surface, a forward end and a pair of sides. Each side of the lift bridge has an inner channel for engaging the outward flange of the respective leveling pad, and each side further has a finger extending rearward from the rectangular plate with a flange extended downward for abutting the rearward edge of the leveling pad.

Abstract: The power unit includes a generally rectangular frame having a pair of parallel lift arms with forward ends extendable upward therefrom. The lift arms have leveling pads pivotally attached to the outer sides thereof, wherein each leveling pad includes a generally rectangular plate oriented vertically having a rearward edge and an upper edge with a longitudinal flange extending outward from the upper edge. The lift bridge slides along the upper surface of the lift arms and includes a rectangular plate having a bottom surface and a pair of sides. Each side has an inner longitudinal channel for engaging the outward flange of the leveling pad, and has a finger extending rearward with a flange extended downward for abutting the rearward edge of the leveling pad.

Abstract: A power unit for use with a jack stand and a lift bridge has a rectangular frame with a forward end having a pair of separated elongated extensions for supporting the jack stand. The extensions extend about 1.50 inches beyond the latch finger of a positioned jack stand. A pair of side flanges extend upwardly from the frame with a “U” shaped retaining channel attached horizontally therein. A pair of lift arms are interconnected at the rearward ends by a lateral push bar that slides within the retaining channels by the ram of a hydraulic cylinder. A pair of connecting arms are pivotally connected near the forward end of the frame and the central portions of the lift arms. The forward ends of the lift arms have a pair of frusta-conical discs for self-aligning engagement with the lower ends of the lifting plate of the jack stand. The power unit includes a lift bridge for positioning at the forward ends of the lift arms.

Abstract: A three stage jack stand has a base plate, and includes a first stage tubular rectangular housing. A second stage “U” shaped ratchet shaft has ratchet teeth on the forward edges, and is telescopically positioned in the housing. An upper base is attached to the ratchet shaft having a lower portion also extendable and retractable within the housing; and having a vertical cylindrical opening. A third stage tubular shaft has ratchet teeth in the left and right sides, and is telescopically positioned within the opening in the upper base, and has a lift collar mounted on the upper end. The tubular shaft is automatically controlled by a pair of pivotal upper dogs. The dogs have upper ends biased into a tooth of the tubular shaft, and have inclined lower ends that pivot the upper ends into disengagement when the lower ends are within the tubular housing.

Abstract: An improved durable golf tee comprises a separate upper portion and a separate lower portion that are axially aligned and enclosed within a flexible collar. The upper portion has an upper end for supporting a golf ball, an upper shank and a lower end having an upper annular flange. The lower portion has a pointed lower end for inserting the tee into the ground, a lower shank and an upper end having a lower annular flange. The flexible collar encloses the lower end of the upper portion and the upper end of the lower portion, forming an integral golf tee, whereby the upper portion and the lower portion are independently flexible within the collar. In a second embodiment, the interior tee portions are molded as a single tee component having the upper portion and the lower portion interconnected by a reduced-diameter (break-away) center portion. The center portion and the respective inner ends of the upper and lower portions are enclosed within the flexible collar.