US4381903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opposed piston machinery
Assignee: Hamworthy Engineering Ltd
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Filing: 1980-09-25
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Granted: 1983-05-03
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Expires: 2000-09-25
Abstract
Abstract An opposed-piston compressor has a rigid yoke which interconnects the pistons, and a drive comprising a crankshaft and balance weights within the yoke, enabling the shaft bearings to be placed close to the center line of the pistons.
Inventors
- 👤 John E. L. Atkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:30
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/22; F16F15/26; F16F15/261; F04; F04B; F04B27/00; F04B27/02; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18208
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
185 words
A reciprocatory machine comprising: a casing which incorporates two opposed coaxial cylinders; a respective piston slidable in each cylinder; a rigid yoke disposed between and rigidly interconnecting said pistons which yoke is a rigid box-like frame having opposite end members, each detachably secured to a respective piston, and four spaced side members rigidly connected to and extending between the said yoke end members, the yoke being supported in the casing solely by the said pistons, the said side members defining between them a first pair of opposed lateral openings and a second pair of opposed lateral openings; a crank shaft journalled in the housing and extending through said first pair of opposed lateral openings and having a crank disposed within the yoke and a balance weight on each side of the crank said balance weights also being disposed within the yoke, said second pair of opposed lateral openings accommodating said balance weights on rotation of the crank shaft; a gudgeon pin mounted in the yoke at one end of the yoke; and a connecting rod within the yoke, connecting the crank to the gudgeon pin.
Claim 2
Dependent Claim
185 words
A reciprocatory machine comprising: a casing which incorporates two opposed coaxial cylinders; a respective piston slidable in each cylinder; a rigid yoke disposed between and rigidly interconnecting said pistons which yoke is a rigid box-like frame having opposite end members, each detachably secured to a respective piston, and four spaced side members rigidly connected to and extending between the said yoke end members, the yoke being supported in the casing solely by the said pistons, the said side members defining between them a first pair of opposed lateral openings and a second pair of opposed lateral openings; a crank shaft journalled in the housing and extending through said first pair of opposed lateral openings and having a crank disposed within the yoke and a balance weight on each side of the crank said balance weights also being disposed within the yoke, said second pair of opposed lateral openings accommodating said balance weights on rotation of the crank shaft; a gudgeon pin mounted in the yoke at one end of the yoke; and a connecting rod within the yoke, connecting the crank to the gudgeon pin.
Claim 3
Dependent Claim
26 words
A machine according to claim 1 in which the opposed cylinders are of different sizes and are interconnected, whereby the said machine forms a two-stage compressor.
Claim 4
Dependent Claim
16 words
A machine as in claim 1 or 2 in which the pistons and cylinders are over-square.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |