Patents by Inventor Jacques Boileau

Jacques Boileau has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5174837
    Abstract: The present invention relates to the field of propellent charges for small and medium calibre arms.The invention relates to a process for the manufacture of fragmentable propellent charges, which consists in a first stage in coating powder particles with a mixture of dinitropolystyrene and of a compound of the polyvinyl nitrate and/or polyvinyl acetate type and, in a second stage, in compressing at between 100.degree. C. and 140.degree. C. the powder particles thus obtained.The invention also relates to the fragmentable charges obtained by the process and to the coated particulate powders obtained at the end of the first stage of the process.The fragmentable charges according to the invention exhibit a temperature behaviour which is superior to that of traditional fragmentable charges and are suitable for cartridgeless ammunition intended for arms with a high rate of fire.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: December 29, 1992
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventors: Jacques Boileau, Louis Leneveu
  • Patent number: 4842658
    Abstract: The present invention relates to nitrocellulose single-base propellent powders which exhibit good resistance to aging and to moisture. The powders according to the invention characteristically contain zinc carbonate whose particle size distribution is between 2 and 50 micrometers as an additive. The zinc carbonate is incorporated in the powder during the blending. The powders according to the invention find their preferred applications as propellent powders for ammunition intended for warships or for aircraft or as powders intended for gas generators for pyrotechnic devices.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: June 27, 1989
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventors: Jacques Boileau, Louis Leneveu, Monique Tromeur
  • Patent number: 4487938
    Abstract: The novel compound, tetranitroglycoluril, is described having a stability under vacuum of 6 cm.sup.3 /g/100 hours at 110.degree. C. The compound exhibits a rate of detonation at least equal to 9,073 meters per second under a density charge of 1.94, has a decomposition temperature of about 200.degree. C. and is stable at a temperature of up to 100.degree. C. at normal pressure. It may be dried at 65.degree. C. The brisance value by the Friedrich's formula is 159.7.times.10.sup.6. The rate of detonation and brisance value are superior to octogen.
    Type: Grant
    Filed: September 21, 1982
    Date of Patent: December 11, 1984
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventors: Jacques Boileau, Jean-Marie L. Emeury, Jean-Paul Kehren
  • Patent number: 4286645
    Abstract: The reinforcement of a pneumatic tire comprises, proceeding in a direction from the inside towards the outside of the tire, a carcass reinforcement continuous from bead to bead and three superimposed plies of cords limited to the region of the tread. In the sidewalls of the tire, the cords of the carcass reinforcement form a substantially constant angle with the circumferential direction of the tire of between 70.degree. and 90.degree.. In the tread region of the tire, the cords of the carcass reinforcement form an angle with the circumferential direction of the tire which is smaller than the angle made by those cords in the sidewalls. The cords of the three tread plies form acute angles .alpha., .beta., and .gamma., respectively, with the circumferential direction, and the cord angle .alpha. of the one of the three tread plies nearest the carcass reinforcement and the cord angles .beta. and .gamma.
    Type: Grant
    Filed: June 20, 1979
    Date of Patent: September 1, 1981
    Assignee: Compagnie Generale des Etablissements Michelin
    Inventor: Jacques Boileau
  • Patent number: 4230169
    Abstract: A tire of elastic material having a tread extended on both sides by a shoulder followed by a sidewall terminating in a bead, the tire being without reinforcement in the tread and in the sidewalls, is improved due to the fact that between each shoulder and the corresponding sidewall the tire has a zone whose rigidity in the circumferential direction is higher than the rigidity of the adjacent shoulder and adjacent sidewall.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: October 28, 1980
    Assignee: Compagnie Generale des Etablissements Michelin
    Inventors: Jacques Boileau, Albert Mathevet
  • Patent number: 4197894
    Abstract: Metal cables of improved fatigue strength, which are particularly suitable for use in an oblique folded ply of metal cables for tire tread reinforcement, comprise a visible outer layer of strands with each strand being formed of at least two elementary wires, the pitch of the strands being less than the pitch of the elementary wires, these two pitches being of the same direction (S or Z).
    Type: Grant
    Filed: May 20, 1976
    Date of Patent: April 15, 1980
    Assignee: Compagnie Generale des Etablissements
    Inventor: Jacques Boileau
  • Patent number: 4197892
    Abstract: Support ring assembly for tires comprising a rigid ring of I-shaped cross-section having an outer diameter less than the inner diameter of the tire tread when the tire is under load and having an inner diameter greater than the outer diameter of the cylindrical wheel rim is improved due to the fact that the assembly further comprises at least one solid annular part of elastic material which is mountable between the rim and the rigid ring, the annular part having an outer diameter substantially equal to the inner diameter of the rigid ring and having an inner diameter and width such that after the tire has been mounted on the rim, the fastening of the assembly on the rim is assured by compression of the elastic material of the annular part.
    Type: Grant
    Filed: May 30, 1978
    Date of Patent: April 15, 1980
    Assignee: Compagnie Generale des Etablissements Michelin
    Inventor: Jacques Boileau
  • Patent number: 4184529
    Abstract: A tread reinforcement of an off the road tire for heavy carrier vehicles comprises at least three plies, two of which each have a strength substantially less than the third, one of these two plies having its edges folded at least around the edges of the third.
    Type: Grant
    Filed: August 1, 1977
    Date of Patent: January 22, 1980
    Assignee: Compagnie Generale des Etablissements Michelin
    Inventor: Jacques Boileau
  • Patent number: 4088168
    Abstract: A tire of elastic material, which is at least partially without reinforcement, is formed of a tread with a shoulder on both sides thereof, each shoulder being extended by a sidewall which terminates in a bead. In accordance with the invention, the shoulders are formed by a zone whose circumferential deformations, for a deflection of the tire of between 0% and 30% of the height of the tire on the rim, are substantially equal to the radial deformations of said zone, the tire being mounted on a rim and inflated.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: May 9, 1978
    Assignee: Compagnie Generale des Etablissements Michelin
    Inventors: Jacques Boileau, Albert Mathevet
  • Patent number: 4061171
    Abstract: Tire with a tread-forming crown extended on both sides by sidewalls terminating in a bead, said tire being made of elastic material and being free of reinforcement.In accordance with the invention, each sidewall comprises at least one region in which the thickness varies and the median line of which has a curvature which changes sign, said tire being mounted on a rim and inflated.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: December 6, 1977
    Assignee: Compagnie Generale des Etablissements Michelin
    Inventors: Jacques Boileau, Albert Mathevet
  • Patent number: 4041866
    Abstract: The invention relates to a conical bimetallic facing for hollow charges and a process for the manufacture of a facing of this type comprising two successive stages:A. explosive overlaying of two blanks of metals of different types, one of which metals produces a dense nozzle which is well drawn out, and the other of which metals is able to give rise to a core which disappears either by volatilisation or by disintegration under the conditions of elevated temperature and pressure which develop when the hollow charge is fired, andB. shaping the resulting bimetallic plate by conical flow turning, in order to obtain the desired conical bimetallic facing. The invention is applicable to the manufacture of a conical bimetallic facing for hollow charges.
    Type: Grant
    Filed: April 15, 1975
    Date of Patent: August 16, 1977
    Assignees: Societe Nationale des Poudres et Explosifs, Etat Francais
    Inventors: Michel J. Thevenin, Michel Brun, Jacques Boileau, Joseph Pegoud
  • Patent number: 3977174
    Abstract: A cable for reinforcing objects formed of elastic or easily deformable material, such as automobile tires and conveyor belts, has as conventional components a core and at least one peripheral layer surrounding the core, each component being formed of elements, such as individual wires or strands of wires. The resistance of such a reinforcing cable to fatigue and/or to wear is increased due to the fact that at least two consecutive components in contact with each other in radial direction are constituted of elements made of material having moduli of elasticity which differ from one component to the other.
    Type: Grant
    Filed: February 11, 1975
    Date of Patent: August 31, 1976
    Assignee: Compagnie Generale des Etablissements Michelin, raison sociale Michelin & Cie
    Inventor: Jacques Boileau
  • Patent number: 3971424
    Abstract: A pneumatic tire has a tread comprising two wide grooves of circumferential orientation and rows of wide grooves of transverse orientation defining circumferential rows of elements in relief. The tread is characterized by the following combination:A. A middle row and two side rows of elements in relief are formed, separated in each row by grooves of transverse orientation discharging alternately, in the case of the middle row, into the wide grooves of circumferential orientation and, in the case of the side rows, into the adjacent wide groove of circumferential orientation and into the adjacent edge of the tread.B. The grooves of transverse orientation of each row of elements in relief are connected in pairs by grooves of reduced width and at most the same depth as the depth of the longitudinal and transverse grooves.C. The sum of the lengths, projected on a meridian section, of the transversely oriented grooves connected in pairs is between 0.75 and 1.5 times the width of the tread.
    Type: Grant
    Filed: July 11, 1975
    Date of Patent: July 27, 1976
    Assignee: Compagnie Generale des Etablissements Michelin
    Inventor: Jacques Boileau
  • Patent number: 3938575
    Abstract: The durability and stability of the beads of a radial ply pneumatic tire are improved by making the tensions acting on the main radial carcass ply and on the portion thereof folded over the bead ring different from each other and having the tension acting on the main radial carcass ply greater than the tension acting on the folded-over portion.
    Type: Grant
    Filed: April 9, 1975
    Date of Patent: February 17, 1976
    Assignee: Compagnie Generale des Etablissements Michelin, raison sociale Michelin & Cie
    Inventor: Jacques Boileau