US3885889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for reducing effective pumping capacity of a refrigerant vapor compressor
Assignee: Individual
•
Filing: 1974-01-02
•
Granted: 1975-05-27
•
Expires: 1994-01-02
Abstract
Abstract The effective pumping capacity of a refrigerant vapor compressor is reduced by interposing a spacer plate between the valve plate and the cylinder block.
Inventors
- 👤 James D Bares
- 👤 Jr William P Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:04
CPC Classifications
F; F01; F01B; F01B31/00; F01B31/14; F04; F04B; F04B49/00; F04B49/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A method of reducing the effective pumping capacity of a refrigerant vapor compressor, which compressor includes a block having at least one cylinder bore therein with a piston reciprocally mounted in each bore and each having a predetermined fixed stroke length, a cylinder head, and a valve plate interposed between said head and said block, comprising the steps of providing a spacer plate having through bores therein corresponding to the cylinder bores and forming a continuation of each cylinder bore, said spacer plate being formed of a relatively rigid relatively non-deformable material, and interposing the spacer plate between the valve plate and block, whereby to increase the clearance volume of the cylinder bore and decrease the volumetric efficiency.
Claim 2
Independent Claim
118 words
A method of reducing the effective pumping capacity of a refrigerant vapor compressor, which compressor includes a block having at least one cylinder bore therein with a piston reciprocally mounted in each bore and each having a predetermined fixed stroke length, a cylinder head, and a valve plate interposed between said head and said block, comprising the steps of providing a spacer plate having through bores therein corresponding to the cylinder bores and forming a continuation of each cylinder bore, said spacer plate being formed of a relatively rigid relatively non-deformable material, and interposing the spacer plate between the valve plate and block, whereby to increase the clearance volume of the cylinder bore and decrease the volumetric efficiency.
Claim 3
Dependent Claim
28 words
The invention as defined in claim 1 wherein each of the through apertures have the same size and shape as the cross-sectional configuration of their corresponding cylinder bore.
Claim 4
Dependent Claim
113 words
In a refrigerant vapor compressor having a block with at least one cylinder bore therein, and with a piston reciprocally mounted in each bore and each having a predetermined fixed stroke length, said compressor having also a head, and a valve plate interposed between the head and the block, the improvement comprising, a spacer plate formed of a rigid relatively nondeformable material interposed between said valve plate and said block, said spacer plate having a through aperture corresponding to each cylinder bore and each forming a continuation of each cylinder bore, whereby to decrease the effective pumping capacity and volumetric efficiency of the compressor by increasing the clearance volume of the cylinder bore.
Claim 5
Dependent Claim
113 words
In a refrigerant vapor compressor having a block with at least one cylinder bore therein, and with a piston reciprocally mounted in each bore and each having a predetermined fixed stroke length, said compressor having also a head, and a valve plate interposed between the head and the block, the improvement comprising, a spacer plate formed of a rigid relatively nondeformable material interposed between said valve plate and said block, said spacer plate having a through aperture corresponding to each cylinder bore and each forming a continuation of each cylinder bore, whereby to decrease the effective pumping capacity and volumetric efficiency of the compressor by increasing the clearance volume of the cylinder bore.
Claim 6
Dependent Claim
30 words
The invention as defined in claim 3 further characterized by each of said apertures being the same in size or shape as the cross-section configuration of its respective cylinder bore.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |