US3884124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic device
Assignee: Reliance Electric Co
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Filing: 1973-04-19
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Granted: 1975-05-20
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Expires: 1993-04-19
Abstract
Abstract A hydraulic motor having a stator with alternately inwardly and outwardly, radially extending reaction surfaces, a rotor disposed within said stator and having a plurality of chambers in its peripheral surface elongated in the direction of the axis of the rotor, and slippers disposed in each of the chambers for reciprocating movement therein. Each slipper has a recess in the surface facing the reaction surfaces, and a rolling element disposed in each recess contacts the reaction surface. Relative movement between the stator and rotor causes a tilting action of the slipper which is utilized to form a contact seal between the side of the slipper and the side walls of the chambers. Lubricating channels may be provided in the surface of the recess to lubricate the rolling element, utilizing the hydraulic fluid communicated to the channels by passages in the slipper. While the hydraulic device is intended primarily for use as a motor, the principles involved in the motor may be utilized effectively in a pump.
Inventors
- 👤 Robert T Eddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:03
CPC Classifications
F; F03; F03C; F03C1/00; F03C1/02; F03C1/04; F03C1/0403; F03C1/0435; F03C1/0444; F01; F01B; F01B1/00; F01B1/06; F01B1/0641; F01B1/0644; F01B13/00; F01B13/04; F01B13/06; F01B13/061
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
160 words
A hydraulic device comprising a stator means, a rotor means, one of said means having a plurality of alternate outwardly and inwardly, radially extending reaction surfaces and the other of said means having a plurality of fluid chambers with an opening facing said reaction surfaces, a slipper disposed in each of said chambers for reciprocating movement therein and having a recess in the surface facing said reaction surfaces, a rolling element disposed in said recess and contacting said reaction surfaces, each of said slippers being tiltable to both sides of the radial center line of the respective roller by the motion between the stator and rotor means to form a contact seal with both side walls of its chamber, the side walls of said slippers having a curvature which increases the sealing contact pressure as the slipper tips further from the radial center line of the respective chamber, and fluid inlet and outlet ports being alternately connected with said chambers.
Claim 2
Dependent Claim
160 words
A hydraulic device comprising a stator means, a rotor means, one of said means having a plurality of alternate outwardly and inwardly, radially extending reaction surfaces and the other of said means having a plurality of fluid chambers with an opening facing said reaction surfaces, a slipper disposed in each of said chambers for reciprocating movement therein and having a recess in the surface facing said reaction surfaces, a rolling element disposed in said recess and contacting said reaction surfaces, each of said slippers being tiltable to both sides of the radial center line of the respective roller by the motion between the stator and rotor means to form a contact seal with both side walls of its chamber, the side walls of said slippers having a curvature which increases the sealing contact pressure as the slipper tips further from the radial center line of the respective chamber, and fluid inlet and outlet ports being alternately connected with said chambers.
Claim 3
Dependent Claim
49 words
A hydraulic device as defined in claim 1 in which said stator means is annular shaped and contains the outwardly and inwardly extending reaction surfaces, and said rotor means is disposed within said stator means, and said fluid chambers are disposed in said rotor means in the periphery thereof.
Claim 4
Dependent Claim
31 words
A hydraulic device as defined in claim 1 in which said chambers are elongated in the axial direction of said rotor means and extend to the opposite edges of said means.
Claim 5
Dependent Claim
31 words
A hydraulic device as defined in claim 2 in which said chambers are elongated in the axial direction of said rotor means and extend to the opposite edges of said means.
Claim 6
Dependent Claim
35 words
A hydraulic device as defined in claim 3 in which said slippers are substantially the same length as said chambers and said rolling elements are cylindrically shaped and substantially the same length as said chambers.
Claim 7
Dependent Claim
35 words
A hydraulic device as defined in claim 4 in which said slippers are substantially the same length as said chambers and said rolling elements are cylindrically shaped and substantially the same length as said chambers.
Claim 8
Dependent Claim
170 words
In a hydraulic device having a stator means, a rotor means, one of said means having a plurality of alternate outwardly and inwardly, radially extending reaction surfaces and the other of said means having a plurality of fluid chambers with an opening facing said reaction surfaces, said chambers being elongated in the axial direction of said rotor means: a slipper element for said chambers having an elongated body of substantially the same axial length as the cylinders and elongated recess extending in the axial direction disposed in the surface of said element and facing said reaction surfaces for receiving a rolling element, said slipper element being tiltable to both sides of the radial center line of the respective roller by the relative motion between said stator and rotor means to form a contact seal with both side walls of the chamber, the side walls of said slippers having a curvature which increases the sealing contact pressure as the slipper tips further from the radial center line of the respective chamber.
Claim 9
Dependent Claim
170 words
In a hydraulic device having a stator means, a rotor means, one of said means having a plurality of alternate outwardly and inwardly, radially extending reaction surfaces and the other of said means having a plurality of fluid chambers with an opening facing said reaction surfaces, said chambers being elongated in the axial direction of said rotor means: a slipper element for said chambers having an elongated body of substantially the same axial length as the cylinders and elongated recess extending in the axial direction disposed in the surface of said element and facing said reaction surfaces for receiving a rolling element, said slipper element being tiltable to both sides of the radial center line of the respective roller by the relative motion between said stator and rotor means to form a contact seal with both side walls of the chamber, the side walls of said slippers having a curvature which increases the sealing contact pressure as the slipper tips further from the radial center line of the respective chamber.
Claim 10
Dependent Claim
39 words
A slipper element as defined in claim 7 in which longitudinal grooves are provided in the side wall of said recess and a passage connects each of said grooves with the respective fluid chamber for lubricating the rolling element.
Claim 11
Dependent Claim
25 words
A slipper element as defined in claim 7 in which a longitudinal groove is disposed on opposite sides of the external surface of said slipper.
Claim 12
Dependent Claim
54 words
A hydraulic device as defined in claim 7 in which the chambers are in the rotor means, and said slipper element applies a fluid sealing force to the walls of said rotor means defining the respective chamber as the rolling element supported by said slipper element engages said alternately outward and inward reaction surfaces.
Claim 13
Dependent Claim
47 words
A hydraulic device as defined in claim 10 in which the walls defining said chamber in said rotor means extend axially from one side of the rotor means to the other and are straight and parallel to one another in the area engaged by said slipper element.
Claim 14
Dependent Claim
42 words
A hydraulic device as defined in claim 11 in which opposite sides of said slipper element firmly contact opposite walls of the respective chamber when said slipper elements are tilted by the relative movement of the rotor means in the stator means.
Claim 15
Dependent Claim
69 words
A hydraulic device as defined in claim 12 in which opposite sides of said slipper element contact opposite walls of the respective chamber when said slipper elements are tilted by the relative movement of the rotor means in the stator means, with the margins of the longitudinal side edges of the slipper element forming the line of contact between the slipper element and the sides of the respective chambers.
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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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |