Oil dispensing apparatus

Details Oil dispensing apparatus Oil dispensing apparatus

2000-07-31

2001-08-07

Derakshani, Philippe (Department: 3754)

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

C222S494000

Reexamination Certificate

active

06269981

ABSTRACT:

REFERENCE TO MICROFICHE APPENDIX
This application is not referenced in any microfiche appendix.
TECHNICAL FIELD OF THE INVENTION
In general, the present invention relates to fluid dispensing mechanisms providing for require a measured volume displacement of fluid. In particular, the present invention is directed to an oil dispenser for use on two-cycle engines which require a mixture of oil and gasoline according to a predefined ratio.
BACKGROUND OF THE INVENTION
Fluid dispensing mechanisms are well known and represented within the prior art:
U.S. Pat. No. 1,866,784 issued to C. L. Williams on Jul. 12, 1932 discloses a one-hand oil rifle.
U.S. Pat. No. 2,521,961 issued to D. F. Bacheller on Sep. 12, 1950 discloses a catchup dispenser.
U.S. Pat. No. 3,184,123 issued on May 18, 1965 to Philip Joseph Stretton Willshaw relates to a dispenser used to withdraw liquid from a container. In one form, the dispenser is provided with a normally fixed, hollow, cylindrical casing, which may be held by hand or by any other means. An end piece on the forward end of the casing is used to enclose or house a first one-way valve to permit entry of the liquid from the container into the casing. A cap on the rearward end has an opening therein through which a plunger comprising a tubular rod makes a sliding fit. The plunger is slidably sealed to the inside of said casing by sealing means at or adjacent the forward end of the rod. An outlet tube and a second one-way valve are supported at the rearward end.
U.S. Pat. No. 3,721,370 issued to Marshall R. Blum on Mar. 20, 1973 discloses an apparatus for dispensing materials from disposable cartons of the type having a sloping top provided with a central upstanding seal closing the top. The apparatus includes a pair of sloping sides which conform to the top of the carton and means interconnecting the sides for attaching the same to the seal. One of the sides has a hole there through for receiving a pump which is adapted to extend into the carton and operable to remove the contents thereof. The other side of the device can be provided with a second hold defining a template for use in cutting a hole in the carton.
U.S. Pat. No. 4,524,888 issued to Tetsuya Tada on Jun. 25, 1985 discloses a dispenser which has a piston attached to its head and a cylinder attached to its cap and which is constructed so that it may be fitted onto a vessel through the cap and so that it may, in accordance with the sliding movement of the piston, such up a liquid in the vessel into the cylinder through a primary valve and pressurize the liquid to cause the same to issue outside the dispenser through a secondary valve. The dispenser has a child-proofing mechanism including a protruded portion formed on the cap and having an engagement groove and an engagement projection formed on the inner wall surface of the head and, by being rotated with the piston located at its depressed position, engaged with the engagement groove of the protruded portion to lock the piston made integral with the head to its depressed position. An engagement projection or engagement groove is formed on or in the outer wall surface of the cap. An engagement groove or engagement projection is formed in or on the head engageably with the engagement projection or engagement groove of the cap. The dispenser has a mechanism for preventing the rotation and rising movement of the head, formed on a virgin seal removably disposed between the cap and the head.
U.S. Pat. No. 4,690,375 issued to Daniel J. Vorhis discloses an improved self closing valve for use with fluid dispensing containers comprising of a resilient and deformable valve body into which one or two wafers of similar material are permanently inserted causing a normal state of blockage and seal. Manual pressure on the valve body causes all components to deform, allowing passage of a fluid.
U.S. Pat. No. 4,972,972 issued to Daniel J. Goguen on Nov. 27, 1990 discloses a portable fuel dispensing container as defined by an elongate enclosed housing formed with a first forward wall spaced from a second forward wall defining a hose chamber forward of a fuel chamber. The container includes a pressured discharge cap positioning rearwardly through a top wall of the container with a pressurizing jump positions through the top wall of the container adjacent the second chamber. A rigid hose includes a horizontal leg positioned within the fuel chamber, and a vertical leg directed through the forward wall of the container and extending upwardly there along terminating in a coupling for securement to a flexible hose. The flexible hose includes a discharge nozzle at a free end thereof to enable remote filling and discharge of fuel contained within the fuel chamber when pressurized.
U.S. Pat. No. 4,978,101 issued to Toshitaka Nakaya on Dec. 18, 1990 discloses a valve unit of a solenoid controlled valve which is disposed at the tip end of a tubular member which at a location remote from the tip end is connected to the plunger of the electromagnetic drive unit of the solenoid. A linear member inserted in and passing through the tubular member connects the plunger to the valve body of the valve unit. A liquid is conducted into the tubular member from a source. The solenoid controlled valve controls the flow of the liquid through the tubular member.
U.S. Pat. No. 5,038,965 issued to Miro S. Cater on Aug. 13, 1991 discloses a pump dispenser for delivering a predetermined dosage regardless of method of actuation wherein a finger operated pump dispenser employs interconnected upper and lower cylinders, first and second pistons disposed in the upper and lower cylinders, a hollow sleeve, and a stem which extends upwardly through the first piston into the sleeve. The first cylinder, the stem and the two pistons define a pump chamber which is filled with fluid. When the dispenser is actuated, fluid is displaced from the chamber into the second cylinder and a port is opened. The port can be made to open at the moment that all of the fluid is displaced into the second cylinder. Once the port is opened, the fluid is discharged and further piston movement enables fluid to be pulled upward out of the container secured to the dispenser via an opening formed between the second piston, stem and inner wall of the second cylinder refilling the chamber. The motions of pistons, stem and sleeve are so controlled that accurate dosage is produced independently of the method of actuation.
U.S. Pat. No. 5,251,445 issued to Robert E. Farrell on Oct. 12, 1993 discloses an airless hand held hydraulic pump unaffected by gravity that continuously maintains pressure on the fluid in a dynamic reservoir chamber to enable pumping into a dynamic pressure chamber for actuating a forcing rod irrespective of the orientation of the pump. A release valve permits fluid return from the pressure chamber into the reservoir chamber. The pump can be fitted with a tool such as a door forcer.
U.S. Pat. No. 5,307,962 issued to Hui-Yu Lin on May 3, 1994 discloses a container mounted pump with improved check valve structure. An improved pump-head structure, which has a valve annulus mounted on the inlet to the lower end of a liquid accumulator of the pump-head structure to prevent leakage of a liquid from the liquid accumulator. A plunger valve is connected to the valve annulus via a spring piece, which exerts a downward force on the plunger valve and thus maintains the inlet of the lower end of the liquid accumulator forcedly and tightly closed under normal conditions by the downward action of the plunger valve.
U.S. Pat. No. 5,350,091 issued to Jeremy S. Leete on Sep. 27, 1994 discloses a fuel pouring nozzle for use on vented fuel containers that has a base adapted to be attached to a vented fuel container. The base has an end portion at a first end, a downstream end at a second end and a radially extending circumferential ridge situated on the end portion. There is a tubular valve body having a cylindrical side wall with an opening therein, an upstream end having a valve seat and a downstream end having a female threaded

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