Patent US3834281A successfully refreshed from Google Patents.
US3834281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for axial-piston machines and the like
Assignee: Linde GmbH
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Filing: 1973-01-22
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Granted: 1974-09-10
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Expires: 1993-01-22
Abstract
Abstract A motion-transmitting system for converting linear actuating movement into a pivotal movement of a controlled member, especially for the control of an axial-piston machine having a tiltable controlled member by a working piston capable of linear movement, comprises a cylindrical guide body rotating in a cylindrical bore of a working piston and connected to the control member by a cylindrical pin received in a transverse bore of the cylindrical guide body. The pin is preferably threaded directly to the controlled member of the axial piston machine.
Inventors
- 👤 W Heyl
- 👤 K Bergmann
- 👤 H Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:04
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/122; F04B1/26; F04B1/30; F04B1/32; F04B1/324
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
263 words
A motion-transmitting mechanism for an axial piston machine comprising: a linearly shiftable working piston formed with a first cylindrical bore; a cylindrical guide body rotatably received in said cylindrical bore and snugly surrounded by said piston, said body being provided with a second cylindrical bore having an axis transverse to the axis of said first cylindrical bore and said body; a cylindrical pin rotatably received in said second cylindrical bore and shiftable therein while being snugly surrounded by said body, said pin having an end projecting from said body along the axis of said second cylindrical bore; a swingable controlled member having a swing axis and connected to said end for pivoting motion about said swing axis upon axial displacement of said piston, said axial-piston machine comprising a cylindrical drum rotatable about an axis perpendicular to said swing axis and provided with a plurality of axially reciprocable pump pistons, and a control disk acting upon ends of said pump pistons, one of said drum and said control disks constituting said controlled member, said pin threadedly engaging said control member; a cylinder receiving said working piston; and a pilot piston controllable to feed fluid selectively to opposite sides of said working piston for driving same in opposite direction, said first bore lying between said opposite sides, said working piston being formed with a passage leading from said pilot piston to one side of said working piston, said passage communicating with said first bore, said guide body being formed with a recess at least along an arc of its circumference and communicating with said passage.
Claim 2
Dependent Claim
263 words
A motion-transmitting mechanism for an axial piston machine comprising: a linearly shiftable working piston formed with a first cylindrical bore; a cylindrical guide body rotatably received in said cylindrical bore and snugly surrounded by said piston, said body being provided with a second cylindrical bore having an axis transverse to the axis of said first cylindrical bore and said body; a cylindrical pin rotatably received in said second cylindrical bore and shiftable therein while being snugly surrounded by said body, said pin having an end projecting from said body along the axis of said second cylindrical bore; a swingable controlled member having a swing axis and connected to said end for pivoting motion about said swing axis upon axial displacement of said piston, said axial-piston machine comprising a cylindrical drum rotatable about an axis perpendicular to said swing axis and provided with a plurality of axially reciprocable pump pistons, and a control disk acting upon ends of said pump pistons, one of said drum and said control disks constituting said controlled member, said pin threadedly engaging said control member; a cylinder receiving said working piston; and a pilot piston controllable to feed fluid selectively to opposite sides of said working piston for driving same in opposite direction, said first bore lying between said opposite sides, said working piston being formed with a passage leading from said pilot piston to one side of said working piston, said passage communicating with said first bore, said guide body being formed with a recess at least along an arc of its circumference and communicating with said passage.
Claim 3
Dependent Claim
41 words
The mechanism defined in claim 1 wherein said swing axis lies in a plane at least substantially perpendicular to the axis of said working piston and the axis of said first bore is at least approximately parallel to said swing axis.
Claim 4
Dependent Claim
49 words
The mechanism defined in claim 1 wherein said swing axis is at least approximately parallel to the axis of said working piston and the axis of said first bore is at least approximately perpendicular to a plane of said swing axis parallel to the axis of said working piston.
Claim 5
Dependent Claim
13 words
The mechanism defined in claim 1 wherein said controlled member is said disk.
Claim 6
Dependent Claim
142 words
The mechanism defined in claim 4 wherein said axial-piston machine comprises a housing receiving said drum and said disk, said mechanism further comprising means forming a cylinder for said piston in said housing substantially parallel to the axis of said drum and laterally offset therefrom, said piston being received in said cylinder and defining at opposite ends of said piston working chambers pressurizable to shift said working piston in opposite directions, said working piston being formed with an axially extending bore communicating with a source of control fluid and a pilot piston received within said axially extending bore of said working piston from controlling fluid flow to said cHambers; and a control pin extending laterally into said working piston and engaging said pilot piston for shifting the latter and thereby inducing said working piston to follow the motion of said pilot piston.
Claim 7
Dependent Claim
45 words
A mechanism defined in claim 5 wherein said working piston is provided with a passage extending through said first bore and formed at least in part by a sectoral recess in said guide body for communicating between one of said chambers and said pilot piston.
Claim 8
Dependent Claim
25 words
The mechanism defined in claim 6 further comprising oppositely effective spring means on either side of said working piston for yieldably biasing same against displacement.
Claim 9
Dependent Claim
64 words
The mechanism defined in claim 7 wherein the axis of said first bore is perpendicular to the axis of said working piston, the axis of the pin received in said second bore is perpendicular to the axis of said first bore and said swing axis is parallel to a plane defined by the axis of said piston and the axis of said first bore.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |