Patents by Inventor Raimund Roth
Raimund Roth 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).
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Patent number: 11111899Abstract: An axial piston machine of oblique axis design has a pivot angle that is adjustable via a set piston and a control valve and includes a first valve slide that is linearly movable relative to a first valve axis and is connected at two opposite ends to a first or a second fluid port. The first valve slide has a central region that defines a control point at which the lower of pressures at the first and second fluid ports act. The control point is connected via a fixed first throttle and a second throttle to a housing interior. A second valve slide that is linearly movable relative to a second valve axis is configured to adjust the second throttle. The first valve axis is arranged between the set piston and the control valve or a region of the control valve and is oriented transverse to the adjusting axis.Type: GrantFiled: February 12, 2020Date of Patent: September 7, 2021Assignee: Robert Bosch GmbHInventors: David Haenle, Marcus Herrmann, Raimund Roth, Thomas Abenstein
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Patent number: 11105320Abstract: A control plate, for alternatingly fluidically connecting hydrostatic operating chambers, in particular of an oblique axis type axial piston machine, with pressure medium connections, includes a first end face, a second end face, at least a first recess, a first kidney-like control opening, and at least one through-recess. The first face extends transversely to a rotation axis. The second face faces away from the first face. The first recess is bounded in the first end face by the first control opening, and at least partially forms the at least one through recess, which extends toward the second end face from the first end face at an end portion of the first control opening, and which is arranged in or counter to a rotation direction of the rotation axis. An oblique axis construction type axial piston machine includes such a control plate.Type: GrantFiled: August 22, 2019Date of Patent: August 31, 2021Assignee: Robert Bosch GmbHInventors: Alexander Bidell, Christian Hoermann, Marcus Herrmann, Raimund Roth
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Publication number: 20200326003Abstract: An axial piston machine of oblique axis design has a pivot angle that is adjustable via a set piston and a control valve and includes a first valve slide that is linearly movable relative to a first valve axis and is connected at two opposite ends to a first or a second fluid port. The first valve slide has a central region that defines a control point at which the lower of pressures at the first and second fluid ports act. The control point is connected via a fixed first throttle and a second throttle to a housing interior. A second valve slide that is linearly movable relative to a second valve axis is configured to adjust the second throttle. The first valve axis is arranged between the set piston and the control valve or a region of the control valve and is oriented transverse to the adjusting axis.Type: ApplicationFiled: February 12, 2020Publication date: October 15, 2020Inventors: David Haenle, Marcus Herrmann, Raimund Roth, Thomas Abenstein
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Publication number: 20200063724Abstract: A control plate, for alternatingly fluidically connecting hydrostatic operating chambers, in particular of an oblique axis type axial piston machine, with pressure medium connections, includes a first end face, a second end face, at least a first recess, a first kidney-like control opening, and at least one through-recess. The first face extends transversely to a rotation axis. The second face faces away from the first face. The first recess is bounded in the first end face by the first control opening, and at least partially forms the at least one through recess, which extends toward the second end face from the first end face at an end portion of the first control opening, and which is arranged in or counter to a rotation direction of the rotation axis. An oblique axis construction type axial piston machine includes such a control plate.Type: ApplicationFiled: August 22, 2019Publication date: February 27, 2020Inventors: Alexander Bidell, Christian Hoermann, Marcus Herrmann, Raimund Roth
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Patent number: 10094365Abstract: A hydrostatic axial piston machine of swashplate type of construction includes a rotatable cylinder drum that has a plurality of cylinder bores, which are arranged approximately axially, formed in the cylinder drum. A piston is inserted into each cylinder bore at one side. At the other side, each cylinder bore is freely connected via a respective passage opening to a face surface of the cylinder drum. The face surface bears against a static distributor disk. The respective mouths arranged at the face surface, or the passage openings as a whole, have a cross section that has two or four widenings with rounded corners so as to enlarge the cross-sectional area in relation to the circular shape.Type: GrantFiled: December 12, 2014Date of Patent: October 9, 2018Assignee: Robert Bosch GmbHInventors: Alexander Bidell, Wolfgang Mayer, Raimund Roth
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Publication number: 20150167630Abstract: A hydrostatic axial piston machine of swashplate type of construction includes a rotatable cylinder drum that has a plurality of cylinder bores, which are arranged approximately axially, formed in the cylinder drum. A piston is inserted into each cylinder bore at one side. At the other side, each cylinder bore is freely connected via a respective passage opening to a face surface of the cylinder drum. The face surface bears against a static distributor disk. The respective mouths arranged at the face surface, or the passage openings as a whole, have a cross section that has two or four widenings with rounded corners so as to enlarge the cross-sectional area in relation to the circular shape.Type: ApplicationFiled: December 12, 2014Publication date: June 18, 2015Inventors: Alexander Bidell, Wolfgang Mayer, Raimund Roth
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Patent number: 8850953Abstract: An axial piston machine having bent axis construction, having a drive shaft rotatably supported in a housing and ending in a drive flange comprising a face on the drive shaft side, is disclosed in which ball races are formed for receiving piston heads. The piston heads are rotatably retained in the ball races by means of deformable rings. The axial piston machine having bent axis construction possesses characteristics so that pressure relief of the ball head is ensured for all cases. The rings at the inner surface comprise at least one groove running so as to connect the ring faces to each other.Type: GrantFiled: December 11, 2009Date of Patent: October 7, 2014Assignee: Robert Bosch GmbHInventor: Raimund Roth
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Publication number: 20110271828Abstract: An axial piston machine having bent axis construction, having a drive shaft rotatably supported in a housing and ending in a drive flange comprising a face on the drive shaft side, is disclosed in which ball races are formed for receiving piston heads. The piston heads are rotatably retained in the ball races by means of deformable rings. The axial piston machine having bent axis construction possesses characteristics so that pressure relief of the ball head is ensured for all cases. The rings at the inner surface comprise at least one groove running so as to connect the ring faces to each other.Type: ApplicationFiled: December 11, 2009Publication date: November 10, 2011Applicant: Robert Bosch GmbHInventor: Raimund Roth
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Patent number: 6779433Abstract: The invention relates to an axial piston engine (1) with a housing (2), inside the housing interior (4) of which a drive shaft (7) and a cylinder drum (16), arranged axially adjacent to said shaft, are rotatably mounted. The longitudinal mid-axes (9a, 9b) of the driveshaft (7) and the cylinder drum (17) run inclined to each other at an angle (W). Several piston bores (18) are arranged in he cylinder drum (16), running roughly parallel to the mid-axis thereof and in which pistons (21) may run axially up and down. The ends of said pistons, facing the driveshaft (7), are universally pivoted.Type: GrantFiled: November 6, 2002Date of Patent: August 24, 2004Assignee: Brueninghaus Hydromatik GmbHInventors: Werner Brosch, Raimund Roth
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Publication number: 20040035102Abstract: The invention relates to a hydrostatic transmission (1), comprising a hydraulic pump (2) and a hydraulic engine (3) linked with the hydraulic pump (2) via working lines. A by-pass line (6) links the high-pressure system with the low-pressure system and is connected to the high-pressure system and to the low-pressure system at branches (6a, 6b). A stop valve (7) is disposed in the by-pass line (6) and opens the by-pass line (6) when the pressure in the high-pressure system drops below the pressure in the low-pressure system. The circuit portion that extends between the branches (6a, 6b) and through the hydraulic engine (3) is longer than half the length of the entire circuit, thereby enlarging the possible applications and uses of the hydrostatic transmission (1).Type: ApplicationFiled: July 11, 2003Publication date: February 26, 2004Inventors: Raimund Roth, Werner Hoermann
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Publication number: 20030136359Abstract: The invention relates to an axial piston engine (1) with a housing (2), inside the housing interior (4) of which a drive shaft (7) and a cylinder drum (16), arranged axially adjacent to said shaft, are rotatably mounted. The longitudinal mid-axes (9a, 9b) of the driveshaft (7) and the cylinder drum (17) run inclined to each other at an angle (W). Several piston bores (18) are arranged in he cylinder drum (16), running roughly parallel to the mid-axis thereof and in which pistons (21) may run axially up and down. The ends of said pistons, facing the driveshaft (7), are universally pivoted.Type: ApplicationFiled: November 6, 2002Publication date: July 24, 2003Inventors: Werner Brosch, Raimund Roth