US 4,377,965 AGranted

Arrangement of a control body

OwnerKarl Eickmanninventor

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Abstract

In a number of patents my former art of control bodies which have centric and eccentric portions are disclosed for the passing and control of flow of fluid into and out of working chambers in fluid handling devices, such as fluid pumps, motors, compressors, transmissions. The invention discovers, that those control bodies of the former art under certain circumstances tend to rotate slightly by a few degrees under friction in the control mirror and then stick very strongly their seats whereby they lose their ability to adjust themselves axially and for good seal under small friction along the stationary control face of the rotor. The invention overcomes this problem by providing a retainer on a stationary portion in the device to prevent the control body from any rotation around one of its axes. The smooth operation of the control body is thereby assured and the former sticking and loss of ability to operate perfectly is overcome.

Claims5

Dependent claims

An arrangement of a control body having centric and eccentric portions, in a device which contains working chambers which contain fluid and wherein said device has passages for leading fluid to and from said working chambers;

at least one thrust-chamber for the reception of at least a portion of said control body, a rotary control face ported by said passages, a stationary control face on said control body, interrupted by contrl parts which are connected to portions of said passages and a thrust bearing means for axially bearing a fluid handling body of said device and thereby defining the axial location and fixing of said rotary control face, while fluid under pressure in said thrust chamber presses said control body towards said fluid handling body and thereby said stationary control face into sealing engagement on said rotary control face, whereby said faces seal and slide along each other when one of said bodies revolves relatively to the other of said bodies and when pressure is present in fluid in said at least one thrust chamber;
wherein
a retainer is provided in said device and engaging said control body to prevent rotation of said control body relatively to said thrust chamber,
wherein
said device includes a holding part and said control body includes an arresting part,
wherein
said parts form portions of said retainer,
wherein
one of said parts is provided with an extension;
wherein
the other of said parts is provided with an at least partially open room,
wherein
said extension is at least axially moveably fitted into said partially open room,
wherein
said holding part is an insertion provided in said device and able to be fastened to a stationary portion of said device, and,
wherein
said holding part is adjustable at least in a limited extent relatively to said stationary portion in the direction of rotation around an axis of said control body.

14 more elements

at least one thrust-chamber for the reception of at least a portion of said control body, a rotary control face ported by said passages, a stationary control face on said control body, interrupted by control ports which are connected to portions of said passages and a thrust bearing means for axially bearing a fluid handling body of said device and thereby defining the axial location and fixing of said rotary control face, while fluid under pressure in said thrust chamber presses said control body towards said fluid handling body and thereby said stationary control face into sealing engagement on said rotary control face, whereby said faces seal and slide along each other when one of said bodies revolves relatively to the other of said bodies and when pressure is present in fluid in said at least one thrust chamber;
wherein said centric and eccentric portions of said control body are of cylindrical configurations around at least two different but to each other parallel axes of said portions,
said centric and eccentric portions are axially slidably mounted with close fits in respective hollow cylindrical spaces of complementary centric and eccentric location and size respectively and relative to said centric and eccentric portions,
wherein
a retainer is located in said device for engagement of said control body to prevent rotation of said control body relatively to said thrust chamber,
wherein
said retainer is an arresting member having a non-circular portion and said control body includes a non-circular space of a configuration complementary to said non-circular portion,
wherein
said arresting member is non-rotatably fastened on a stationary portion of said device, and, wherein
wherein
said non-circular portion is axially moveably entered and fitted into said non-circular space.

8 more elements

at least one thrust-chamber for the reception of at least a portion of said control body, a rotary control face ported by said passages, a stationary control face on said control body, interrupted by control ports which are connected to portions of said pssages and thrust bearing means for axially bearing a fluid handling body of said device and thereby defining the axial location and fixing of said rotary control face, while fluid under pressure in said thrust chamber presses said control body towards said fluid handling body and thereby said stationary control face into sealing engagement on said rotary control face, whereby said faces seal and slide alone each other when one of said bodies revolves relatively to the other of said bodies and when pressure is present in fluid in said at least one thrust chamber;
wherein said centric and eccentric portions of said control body are of cylindrical configurations around at least two different but to each other parallel axes of said portions,
said centric and eccentric portions are axially slidably mounted with close fits in respective hollow cylindrical spaces of complementary centric and eccentric location and size respectively and relative to said centric and eccentric portions,
wherein
a retainer is located in said device for engagement of said control body to prevent rotation of said control body relatively to said thrust chamber, wherein said close fits permit an angular pivotion of said control body relatively to said hollow cylindrical spaces within right and left angular boundaries at which said control body would become sticking in said hollow cylindrical spaces and become unable to slide achsially in said hollow cylindrical spaces due to said sticking,
wherein
said engagement includes at least one member engaging into an outcut with limited angular space between said member and the wall(s) of said outcut,
wherein
said limited angular space resstricts the angular pivotability of said engagement to a smaller angle than the angle of said angular pivotion permitted by said close fits is,
whereby
said angular pivotion of said control body is restricted to a smaller pivotion than said pivotion between said right and left boundaries,
whereby
said sticking of said control body in said right and left boundaries is prevented and the free axial moveability of said control body remains secured,
wherein
said retainer is an arresting means having a non-circular space and said control body includes a non-circular portion of a configuration complementary to said non-circular space
wherein
said arresting means is non-rotatably united with a stationary portion of said device, and,
wherein
said non-circular portion is axially moveably entered and fitted into said non-circular space.

16 more elements

Dependencies are inferred from the claim text.