US3811283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-cylinder stirling gas motor with double-acting pistons
Assignee: Battelle-Institut
•
Filing: 1973-02-08
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Granted: 1974-05-21
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Expires: 1993-02-08
Abstract
Abstract Multi-cylinder Stirling gas motor with double acting pistons which are rigidly coupled with hydraulic pump pistons by piston rods. The hydraulic pumps provide pressure fluid driving two identical hydrostatic transmissions having multiple lobed rotatable disc pistons with their outer edges lying sealed within respective housings having a number of chambers which corresponds with the number of hydraulic pumps, each pair of corresponding chambers of the two hydraulic motors being connected in parallel and to the respective hydraulic pump. The disc pistons of the hydraulic motors are mounted upon respective eccentric members which can be angularly adjusted relative to each other. The rate of delivery of hydraulic fluid by the respective pumps to the chambers of both hydraulic motors is varied by relative rotation of the eccentric shafts mounting the rotatable disc pistons of the hydraulic motors to change the phase position of the rotatable disc pistons relative to each other.
Inventors
- 👤 R Hartmann
- 👤 H Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:53
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/044; F02G2244/00; F02G2244/50
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
Multi-cylinder Stirling gas motor with first, double acting pistons, second, hydraulic pump pistons, means rigidly coupling respective first and second pistons together for joint movement, two identical hydrostatic transmissions having housings and multiple lobed rotatable disc pistons with their outer edges lying sealed within the respective housings, said housings having a number of chambers which corresponds with the number of hydraulic pumps, conduit means connecting each pair of corresponding chambers of the two hydraulic motors in parallel and to the respective hydraulic pump, eccentric members mounting the respective disc pistons of the hydraulic motors, said eccentric members being angularly adjustable relative to each other, the rate of delivery of hydraulic fluid by the respective pumps to the chambers of both hydraulic motors being varied by relative rotation of the eccentric shafts mounting the rotatable disc pistons of the hydraulic motors to change the phase position of the rotatable disc pistons relative to each other.
Claim 2
Dependent Claim
154 words
Multi-cylinder Stirling gas motor with first, double acting pistons, second, hydraulic pump pistons, means rigidly coupling respective first and second pistons together for joint movement, two identical hydrostatic transmissions having housings and multiple lobed rotatable disc pistons with their outer edges lying sealed within the respective housings, said housings having a number of chambers which corresponds with the number of hydraulic pumps, conduit means connecting each pair of corresponding chambers of the two hydraulic motors in parallel and to the respective hydraulic pump, eccentric members mounting the respective disc pistons of the hydraulic motors, said eccentric members being angularly adjustable relative to each other, the rate of delivery of hydraulic fluid by the respective pumps to the chambers of both hydraulic motors being varied by relative rotation of the eccentric shafts mounting the rotatable disc pistons of the hydraulic motors to change the phase position of the rotatable disc pistons relative to each other.
Claim 3
Dependent Claim
59 words
Multi-cylinder Stirling gas motor in accordance with claim 1, comprising means sealing the rotatable disc pistons of the hydraulic motors to the wall of the respective housing and sustaining the driving force between the piston and the housing, said sealing and force sustaining means for each hydraulic motor comprising rotating rollers journally in the housing and engaging the piston.
Claim 4
Dependent Claim
23 words
Multi-cylinder Stirling gas motor in accordance with claim 2, wherein the rollers are disposed between each pair of successive chambers in the housing.
Claim 5
Dependent Claim
51 words
Multi-cylinder Stirling gas motor in accordance with claim 1, wherein the two hydraulic motors are disposed in a common housing, generally coaxial of each other, and close to each other, a common driven shaft, and means drivingly coupling the rotatable disc pistons of the hydraulic motors to the common driven shaft.
Claim 6
Dependent Claim
73 words
Multi-cylinder Stirling gas motor in accordance with claim 4, comprising a first eccentric member fixed to the driven shaft and mounting the rotatable piston of a first piston of a first hydraulic motor, and a second eccentric member mounted on the driven shaft, the second eccentric member mounting the rotatable piston of the second hydraulic motor, and means for angularly adjusting the second eccentric member angularly about the axis of the driven shaft.
Claim 7
Dependent Claim
27 words
Multi-cylinder Stirling gas motor in accordance with claim 5, comprising pairs of oppositely disposed counterweights affixed respectively to the driven shaft and to the second eccentric member.
Claim 8
Dependent Claim
26 words
Multi-cylinder Stirling gas motor in accordance with claim 6, wherein the counterweights of each pair are spaced apart the same distance axially of said driven shaft.
Claim 9
Dependent Claim
67 words
Multi-cylinder Stirling gas motor in accordance with claim 7, wherein the cylinders of the motor receiving the first pistons are disposed in a housing integrally attached to tHe common housing of the two hydraulic motors, the said cylinders of the motor receiving the first pistons and the cylinders of the hydraulic pumps being disposed in a circle coaxial of the common driven shaft of the hydraulic motors.
References Cited (Backward Citations)
US3525215A
Cited
US3630019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |