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Spring barrel pumpsSpring barrel pumps description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080025850, Spring barrel pumps. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001]This invention has as its object a rotating spring barrel pump in which the pistons move into bores provided through the spring barrel, diametrically to its axis, by moving away under the effect of the centrifugal force and by drawing closer by resting on an eccentric ring. [0002]Such pumps are known by the patents WO 02/084105 of Oct. 24, 2002; US 2004/065192 of Sep. 17, 2003; DE 198 42 120 of Sep. 21, 1998; DE 36 28 769 of Aug. 25, 1986 and EP 0 812 985 of Jun. 3, 1997. [0003]These known pumps all have the drawback of using complex means to ensure the supplying and the conveying of the oil, which in practice prevents their use for high turning speeds of the spring barrel and therefore limits the usage thereof. [0004]The pump according to the invention comprises both very simple and particularly high-performing supplying and discharging means that allow its use at very high turning speeds of the spring barrel. [0005]The pump according to the invention is a rotating spring barrel pump in which the pistons move into bores provided diametrically through said spring barrel by moving away under the effect of the centrifugal force and by drawing closer by resting on an eccentric ring, characterized by the fact that said bores communicate: on the one hand with the supply duct by means of ducts emptying into a chamber that is located behind the rotating spring barrel, a chamber into which the supply duct empties; on the other hand, with the conveyor duct by means of a collector, applied against the rear surface of said spring barrel by a spring, whereby this collector is equipped with a cup that communicates with said conveyor duct; whereby said collector is eccentric relative to the axis of the spring barrel such that each of the ducts empties into said chamber during a half-turn and into the cup during a half-turn. [0006]By way of nonlimiting example and to facilitate the comprehension of the invention, the following was shown in the accompanying drawings: [0007]FIG. 1: A longitudinal cutaway view of an embodiment of the invention. [0008]FIG. 2: A view on an enlarged scale of a portion of FIG. 1, whereby the parts are in median position. [0009]FIG. 3: A view corresponding to FIG. 2, after a rotation of 90.degree.. [0010]FIG. 4: A cutaway view along BB of FIG. 1. [0011]By referring to these figures, it is seen that the pump that is indicated by the general reference P is driven by a motor M. [0012]The pump P consists of a spring barrel 1 that, in the example shown, is a full cylindrical body, whose end 1a is traversed, along a diameter, by a bore 2. [0013]This bore 2 is separated into two equal portions 2a, 2b by a plug 3 that is placed on the axis XX of the spring barrel 1. [0014]In the bores 2a, 2b, two cylindrical flyweights 4a and 4b, which project slightly beyond the rear cylindrical portion 1a of the spring barrel 1, slide freely. [0015]The ends of the flyweights 4a, 4b that project beyond the spring barrel 1a rest against a circular ring 5. [0016]As is seen in FIG. 3, this ring is eccentric relative to the axis XX. [0017]This pump is designed to be driven at very high speeds, on the order of 25,000 rpm. [0018]At such speeds, the flyweights 4a, 4b are moved away from the axis XX by the centrifugal force and are brought toward the center by the ring 5, which is eccentric: this back-and-forth movement of the flyweights 4a, 4b produces a pumping effect, whereby said flyweights act as pistons. [0019]It is necessary that the hydraulic fluid can return into the bores 2 during the spacing movement of the flyweights/pistons 4 and can be evacuated under pressure when these flyweights/pistons 4 are pushed back by the ring 5. [0020]For this purpose, the bores 2a and 2b are each connected by a pipe 6a, 6b to a chamber 7 into which the hydraulic fluid enters via an intake pipe 8. [0021]A conveyor collector 9 is applied by a spring 10 against the flat rear surface 11 of the rear portion 1a of the spring barrel 1. [0022]The end of said conveyor collector 9 that rests against the surface 11 comprises a cylindrical cup 12 that communicates with a discharge duct 13. [0023]As is indicated in FIG. 2 by the broken line Z, the axis of the cup 12 is eccentric relative to the axis XX of the spring barrel 1. [0024]As is seen by comparing FIGS. 2 and 3, the result is that when the spring barrel 1 executes a rotation, in a first step, a half-turn, during which the piston 4a moves away under the effect of the centrifugal force, the duct 6a communicates with the chamber 7, and the hydraulic fluid is drawn into the bore 2a; then, in a second step, second half-turn, when the piston 4a is pushed by the ring 5, which is eccentric, the fluid is conveyed from the bore 2a by the duct 6a that then is found in correspondence with the cup 12 because the latter is eccentric. Continue reading about Spring barrel pumps... Full patent description for Spring barrel pumps Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Spring barrel pumps patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Spring barrel pumps or other areas of interest. ### Previous Patent Application: High-pressure fuel pump control apparatus for an internal combustion engine Next Patent Application: Inverted pressure regulating valve for an engine oil pump Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Spring barrel pumps patent info. IP-related news and info Results in 0.10966 seconds Other interesting Feshpatents.com categories: Tyco , Unilever , Warner-lambert , 3m 174 |
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