Patents Assigned to Ateliers Busch SA
  • Patent number: 10260502
    Abstract: The present invention relates to a pumping method in a pumping system (SP) comprising: a primary dry screw-type vacuum pump (3) with a gas entry orifice (2) connected to a vacuum chamber (1) and a gas exit orifice (4) leading into a conduit (5) before coming out into the gas outlet (8) of the pumping system (SP), a non-return valve (6) positioned in the conduit (5) between the gas exit orifice (4) and the gas outlet (8), and an ejector (7) connected in parallel to the non-return valve (6).
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: April 16, 2019
    Assignee: Ateliers Busch SA
    Inventors: Didier Müller, Jean-Eric Larcher, Théodore Iltchev
  • Patent number: 9638181
    Abstract: A vacuum pump includes a cylinder. The cylinder includes an inner casing forming two transversely intersected, parallel cylindrical chambers, the axes of which rest in one plane, and one of the faces of which represents a wall on which a suction hole inlet is located. The cylinder also includes an outer casing disposed around the inner casing to form a confined space, provided with the inlet and an outlet, which allows a liquid to be circulated. Two pump rotors are situated in the parallel cylindrical chambers and are driven in rotation by an electric motor. A drive housing contains the motor and components for driving and synchronizing the pump rotors supporting the rotors by cantilever and serving as support and centering with respect to the cylinder. The drive housing includes two extended supports that are integrally constructed as one piece.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: May 2, 2017
    Assignee: ATELIERS BUSCH SA
    Inventors: Didier Mueller, Theodore Iltchev, Stephane Varrin, Philippe Schwob
  • Publication number: 20130259717
    Abstract: This application relates to a vacuum pump for applications in vacuum packaging machines, comprising: a cylinder, made up of the casing of two transversely intersected, parallel cylindrical chambers, the axes of which rest in one plane, and one of the faces of which represents a wall on which the suction hole is located, and the outer casing containing the casing of two parallel cylindrical chambers to form a confined space, provided with an inlet and an outlet, which allows a liquid to be circulated, carrying out the thermal exchange, and a drive housing containing the motor and the components for driving and synchronizing the pump rotors supporting said rotors by cantilever and serving as support and centring with respect to the cylinder.
    Type: Application
    Filed: September 7, 2011
    Publication date: October 3, 2013
    Applicant: ATELIERS BUSCH SA
    Inventors: Didier Mueller, Theodore Iltchev, Stephane Varrin, Philippe Schwob
  • Patent number: 7981185
    Abstract: Device for extracting droplets of a liquid agent suspended in a gaseous fluid displaced in a machine for displacement of such a gaseous fluid, the extraction device comprising a first part and a second part. The first part comprising a first element, which is of elongated shape, with a longitudinal axis termed the first axis, and is intended to ensure a filtration function inside the apparatus; and a second element, which is intended to enable at least one of the following functions, which are a function of grasping at least by hand the first part and a function of fixing this first part to the second part. The second part comprising a wall that defines a chamber which is intended to be traversed by the gaseous fluid to be filtered and receives said first element in a position termed the operational position; and comprises an opening that delimits a passageway sufficient for the insertion of the first element into the chamber.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: July 19, 2011
    Assignee: Ateliers Busch SA
    Inventor: Theo Bilger
  • Publication number: 20100135837
    Abstract: The invention relates to a pump housing (2) comprising a dual-wall casing (3) which enables a first fluid (4) to flow at least partially around a compression chamber (5) for compressing a second fluid (6), said compression being performed with at least two elongated rotors (7, 8). The dual-wall casing (3) comprises: (i) a first wall (10) which defines the volume of the compression chamber (5), and (ii) a second wall (11) which extends around the first wall (10) at a distance (12) from same such as to enable the first fluid (4) to flow therethrough. The pump housing (2) consists of two subassemblies (13, 14), namely a first subassembly (13) and a second subassembly (14), which are assembled along a sealing surface (15) that is essentially orthogonal to the longitudinal axes (70, 80) of the rotors (7, 8).
    Type: Application
    Filed: August 25, 2005
    Publication date: June 3, 2010
    Applicant: ATELIERS BUSCH SA
    Inventors: Olivier Goepfert, Philippe Schwob, Theo Bilger
  • Publication number: 20100050877
    Abstract: Device for extracting droplets of a liquid agent suspended in a gaseous fluid displaced in a machine for displacement of such a gaseous fluid, the extraction device comprising a first part and a second part. The first part comprising a first element, which is of elongated shape, with a longitudinal axis termed the first axis, and is intended to ensure a filtration function inside the apparatus; and a second element, which is intended to enable at least one of the following functions, which are a function of grasping at least by hand the first part and a function of fixing this first part to the second part. The second part comprising a wall that defines a chamber which is intended to be traversed by the gaseous fluid to be filtered and receives said first element in a position termed the operational position; and comprises an opening that delimits a passageway sufficient for the insertion of the first element into the chamber.
    Type: Application
    Filed: November 27, 2006
    Publication date: March 4, 2010
    Applicant: ATELIERS BUSCH SA
    Inventor: Theo Bilger
  • Patent number: 7625191
    Abstract: Rotary displacement machine having a housing and at least two twinned rotors of asymmetrical profile, the twinned rotors each made of a core on which projects a helicoidal thread which extends above the core like a tooth. The helicoidal thread having a first predetermined dimension in a direction radial to the longitudinal axis of the twinned rotors and above the surface of a rotor. The machine having a first flank with a position and length of arc predetermined such that the shape of the first flank and the shape of the second flank each connect to one of the opposite ends of a connecting segment which constitutes a helicoidal surface. The connecting segment having a second predetermined dimension in a direction radial to the longitudinal axis of the twinned rotors such that the ratio of the second dimension over the first dimension ranges between 0.005 and 0.1.
    Type: Grant
    Filed: February 16, 2005
    Date of Patent: December 1, 2009
    Assignee: Ateliers Busch SA
    Inventor: Olivier Goepfert
  • Publication number: 20080240967
    Abstract: Rotary displacement machine comprising un housing and at least two twinned rotors referred to as being of asymmetrical profile, these twinned rotors each being made up of a core on which projects a helicoidal thread which extends above said core in the manner of a tooth which tooth has a first predetermined dimension in a direction radial to the longitudinal axis of that of the twinned rotors under consideration and above the surface of this rotor, this machine being characterized in that instead of comprising a first flank and a second flank of which the conventional shapes and connect at a first point in such a way as to form a sharp edge along the helicoidal thread: on the one hand, said first flank has a shape, referred to as modified shape, of which the position and the length of arc are predetermined such that said modified shape of this first flank and the conventional shape of the second flank each connect to one of the opposite ends and of a short segment, referred to as connecting segment, whic
    Type: Application
    Filed: February 16, 2005
    Publication date: October 2, 2008
    Applicant: ATELIERS BUSCH SA
    Inventor: Olivier Goepfert
  • Patent number: 6702558
    Abstract: The twin screw rotors for axis-parallel installation in displacement machines for compressible media have asymmetrical transverse profiles and numbers of wraps that are ≧2. Depending upon the wrapping angle (&agr;), the pitch (L) varies, which pitch increases in a first subdivision (T1) from the suction-side screw end, reaches a maximal value (Lmax) after one wrap, decreases in a second subdivision (T2) until a minimal value (Lmin), and is constant in a third subdivision (T3). The pitch course in the first subdivision (T1) is preferably mirror-symmetrical to that in the second subdivision (T2), within the subdivisions T1 to T2, it is point-symmetrical to the mean values in almost all cases. Compact screw rotors, completely free of imbalance, can thereby be achieved with compression rates of 1.0 . . . 10.0, also without profile variation.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: March 9, 2004
    Assignee: Ateliers Busch SA
    Inventor: Ulrich F. Becher
  • Patent number: 6447276
    Abstract: Displacement machines for compressible media having single-threaded, twin screw rotors with continuously decreasing pitch to achieve an inner compression are known. The demand for compact pumps with rotors as short as possible, and the frequent, process-related demand for quick disassembly of the housing, set limits however for the wrapping angle or respectively for the variation of the end profiles, which, in turn, leads to extreme pitch ratios or to insufficient compression rates. The present invention uses screw rotors with an optimized, non-monotone pitch course and alternative end profile variation with constant diameters. Suction capability is improved with the same space requirement, and compression rates of 3.0 and more are achieved easily with only four wraps. Displacement machines equipped with such twin screw rotors provide optimal results with respect to energy requirement, temperature, construction space and servicing with application possibilities in chemistry and in semiconductor technology.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: September 10, 2002
    Assignee: Ateliers Busch SA
    Inventor: Ulrich Becher
  • Patent number: 6354823
    Abstract: The displacement machine is intended in particular for use as a pump, and has a working area, formed in a housing, which working area is limited by two end walls and a casing, and is accessible via an inlet and an outlet for a working medium. At least one rotor, movably disposed in the housing, subdivides the working area, and a guide gearing for rotor control is connected to a drive apparatus located outside the working area. The invention has as its object to propose a displacement machine which can be manufactured less expensively and with less weight than known displacement machines of this type, and in particular can be operated without any special lubricant for the bearings.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: March 12, 2002
    Assignee: Ateliers Busch SA
    Inventors: Ulrich Becher, Andreas Basteck
  • Patent number: 6290477
    Abstract: The scroll pump has the capability of preserving a minimal play between the joints disposed on the ridges of each of the spiraling walls and the flat wall facing it. Such an arrangement, possible owing to the slight difference in pressure prevailing between two adjacent transfer chambers, makes it possible to prevent wear and tear on the joints, soiling of the transfer chambers as well as overheating due to friction on the joints.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: September 18, 2001
    Assignee: Ateliers Busch SA
    Inventor: René Gigon
  • Patent number: D573609
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: July 22, 2008
    Assignee: Ateliers Busch SA
    Inventor: Théo Bilger
  • Patent number: D583389
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: December 23, 2008
    Assignee: Ateliers Busch SA
    Inventor: Théo Bilger
  • Patent number: D677281
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: March 5, 2013
    Assignee: Ateliers Busch SA
    Inventors: Didier Müller, Theodore Iltchev, Stephane Varrin, Philippe Schwob