US3761202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor with cross axis
Assignee: John E Mitchell Co
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Filing: 1972-01-18
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Granted: 1973-09-25
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Expires: 1992-01-18
Abstract
Abstract A multi-cylinder compressor of the nutating, or cam and wobble plate type, wherein the wobble plate is held against the cam rotor by a cross-axis mechanism that prevents rotation of the wobble plate while permitting its wobble, wherein all axial lost motion between the wobble plate and the cam is taken out by a continuous adjustable force transmitted through the cross-axis mechanism, preferably spring-maintained but capable of being positively and adjustably loaded, and wherein radial lost motion is prevented by design of the cross-axis mechanism.
Inventors
- 👤 O Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:08
CPC Classifications
F; F04; F04B; F04B27/00; F04B27/08; F04B27/10; F04B27/1036; F04B27/1054
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
211 words
In a nutating compressor or like machine of the type having a housing, a drive shaft passing through the housing, a sloping cam on the drive shaft inside the housing and rotated by the shaft, a wobble plate nutated by the rotation of the cam and at least one piston reciprocated within a cylinder in the housing by the plate; the combination of: a joint support in axial alignment with the cam on the input shaft, mounted in the housing; a crossaxis member, means mounting the cross-axis member on the support for rocking movement about a control axis transverse to the cam axis, said means preventing rotation of the cross-axis member relatively to the support about the cam axis; connections between the wobble plate and the cross-axis member providing rocking movement of the plate relatively to the cross-axis member about an oscillating axis at right angles to the control axis; means to hold the joint support against rotation in the housing; and thereby holding the cross-axis member and wobble plate against rotation relatively to the housing; and means to fix the position of the joint support axially in the housing to prevent axial lost motion in the several movable interconnections between the joint support, the cross-axis member and the wobble plate.
Claim 2
Dependent Claim
211 words
In a nutating compressor or like machine of the type having a housing, a drive shaft passing through the housing, a sloping cam on the drive shaft inside the housing and rotated by the shaft, a wobble plate nutated by the rotation of the cam and at least one piston reciprocated within a cylinder in the housing by the plate; the combination of: a joint support in axial alignment with the cam on the input shaft, mounted in the housing; a crossaxis member, means mounting the cross-axis member on the support for rocking movement about a control axis transverse to the cam axis, said means preventing rotation of the cross-axis member relatively to the support about the cam axis; connections between the wobble plate and the cross-axis member providing rocking movement of the plate relatively to the cross-axis member about an oscillating axis at right angles to the control axis; means to hold the joint support against rotation in the housing; and thereby holding the cross-axis member and wobble plate against rotation relatively to the housing; and means to fix the position of the joint support axially in the housing to prevent axial lost motion in the several movable interconnections between the joint support, the cross-axis member and the wobble plate.
Claim 3
Dependent Claim
16 words
The combination of claim 1, with frictionless thrust bearings between the cam and the wobble plate.
Claim 4
Dependent Claim
26 words
The combination of claim 1 wherein the last-named positioning means includes an unyieldable adjusting device to fix the position of the joint support in the housing.
Claim 5
Dependent Claim
28 words
The combination of claim 1, with means to prevent radial movement between the cross-axis member and the joint support and between the cross-axis member and the wobble plate.
Claim 6
Dependent Claim
58 words
The combination of claim 1, wherein the means mounting the cross-axis member on the support comprises a rock shaft device extending transversely to the axis of the cam and a journal bearing device to receive the cross shaft for rocking movement, one of said devices being on the support and the other device being on the cross-axis member.
Claim 7
Dependent Claim
20 words
The combination of claim 5 with means to prevent radial lost motion between the joint support and the cross-axis member.
Claim 8
Dependent Claim
56 words
The combination of claim 5, wherein the joint support has opposite radially extending arms, the cross-axis member being disposed between them, and radially extending rock shaft means between the cross-axis member and the arms, the arms embracing the cross-axis member with a fit that permits free rocking movement but prevents relative radial movement between these parts.
Claim 9
Dependent Claim
48 words
The combination of claim 1, wherein the connection between the wobble plate and cross-axis member includes a radially extending rock shaft device and a radially extending bearing device for the rock shaft, one of said devices being on the wobble plate and the other on the cross-axis member.
Claim 10
Dependent Claim
36 words
The combination of claim 8, with a recess in the wobble plate to receive the cross-axis member, the parts having a close fit to permit free rocking movement but to prevent radial lost motion between them.
Claim 11
Dependent Claim
99 words
The combination of claim 1, wherein the joint support has an axial shaft disposed in an axial socket in the housing, and has a bifurcated free end toward the cam, a control shaft mounted in the bifurcations and the cross-axis member to provide rocking of the cross-axis member about an axis transverse to the cam axis, the cross-axis member having second rock shaft means projecting from it along an oscillating axis at right angles to the control shaft, the wobble plate having recesses to receive the rock shaft means to permit rocking of the plate about the oscillating shaft.
Claim 12
Dependent Claim
36 words
The combination of claim 10, wherein the wobble plate has a central recess into which the cross head fits with the rock shaft means extending therefrom to engage the plate radially outwardly from the cross head.
Claim 13
Dependent Claim
33 words
The combination of claim 12, with means engaging the end of the joint support for displacing it in its socket towarD the wobble plate, thereby to take up lost motion in the connection.
Claim 14
Dependent Claim
28 words
The combination of claim 12, wherein the engaging means includes a spring acting against the end of the joint support and against means fixed to the compressor housing.
Claim 15
Dependent Claim
139 words
In a nutating compressor having a housing, a plurality of pistons and piston rods in the front end of the housing, a drive shaft journalled through the rear of the housing; a rotor cam on the shaft, a wobble plate follower adapted to receive the piston rods, anti-friction means for the cam and follower including axial thrust bearing means, an axially slidable non-rotatable joint support on the housing, means for providing rearward axial thrust on the joint support; and two-axis means between the support and the wobble plate follower, said two-axis means being disposed to receive the rearward axial thrust of the means providing same on the joint support, and to transmit the thrust through to the follower, the two-axis means also providing for the rocking movement of the follower but preventing rotation thereof relative to the piston rods.
Claim 16
Dependent Claim
139 words
In a nutating compressor having a housing, a plurality of pistons and piston rods in the front end of the housing, a drive shaft journalled through the rear of the housing; a rotor cam on the shaft, a wobble plate follower adapted to receive the piston rods, anti-friction means for the cam and follower including axial thrust bearing means, an axially slidable non-rotatable joint support on the housing, means for providing rearward axial thrust on the joint support; and two-axis means between the support and the wobble plate follower, said two-axis means being disposed to receive the rearward axial thrust of the means providing same on the joint support, and to transmit the thrust through to the follower, the two-axis means also providing for the rocking movement of the follower but preventing rotation thereof relative to the piston rods.
Claim 17
Dependent Claim
34 words
The combination of claim 14, wherein the two-axis means includes abutting shoulders adjacent the axes to prevent radial displacement of its parts and the follower, while it transmits the non-rotation and rearward axial thrust.
References Cited (Backward Citations)
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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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |