US3626979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluit compression system control
Assignee: Carrier Corp
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Filing: 1970-01-28
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Granted: 1971-12-14
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Expires: 1990-01-28
Abstract
Abstract An unloading valve for controlling the capacity of a compressor comprising a housing defining a bore, an inlet to said housing connected to the discharge side of a compressor, a first outlet from said housing connected to the suction side of said compressor, and a second outlet from said housing connected to the discharge manifold of the compressor. Disposed in the bore is a piston assembly and poppet operable in response to changes of pressure in the bore. The piston and poppet move as a result of changes of pressure in the bore, created by the bore being selectively communicated with the side of the compressor and with the discharge side of the compressor. Movement of the piston assembly and poppet selectively communicates the inlet of said valve with either the suction side of the compressor when reduced capacity is required or with the discharge manifold when rated capacity is required.
Inventors
- 👤 Richard S Abell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:07
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/007; F04B49/22; F04B49/24; F25; F25B; F25B2600/00; F25B2600/02; F25B2600/026; F25B2600/0261; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/8593; Y10T137/877; Y10T137/87788
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
196 words
An unloading valve for controlling the capacity of a fluid compressor comprising: A. a housing; B. inlet means to said housing; C. first discharge means from said housing; D. second discharge means from said housing; E. pressure-responsive means disposed in said housing having a first operating position when the fluid compressor is functioning at rated capacity and having a second operating position when said fluid compressor is functioning at reduced capacity, said pressure-responsive means communicating said inlet means and said first discharge means when in its first operating position, and communicating said inlet means with said second discharge means when in its second operating position, said pressure-responsive means including: 1. piston means reciprocally disposed in said valve housing; and 2. poppet means reciprocally disposed in said valve housing, the movement thereof being in an opposite direction to the movement of said piston; and F. means operable to vary the pressure acting on said pressureresponsive means, said pressure being of a first magnitude when it is desired to have said pressure-responsive means in its first operating position, and being of a second magnitude when it is desired to have said pressure-responsive means in its second operating position.
Claim 2
Dependent Claim
196 words
An unloading valve for controlling the capacity of a fluid compressor comprising: A. a housing; B. inlet means to said housing; C. first discharge means from said housing; D. second discharge means from said housing; E. pressure-responsive means disposed in said housing having a first operating position when the fluid compressor is functioning at rated capacity and having a second operating position when said fluid compressor is functioning at reduced capacity, said pressure-responsive means communicating said inlet means and said first discharge means when in its first operating position, and communicating said inlet means with said second discharge means when in its second operating position, said pressure-responsive means including: 1. piston means reciprocally disposed in said valve housing; and 2. poppet means reciprocally disposed in said valve housing, the movement thereof being in an opposite direction to the movement of said piston; and F. means operable to vary the pressure acting on said pressureresponsive means, said pressure being of a first magnitude when it is desired to have said pressure-responsive means in its first operating position, and being of a second magnitude when it is desired to have said pressure-responsive means in its second operating position.
Claim 3
Dependent Claim
76 words
poppet means reciprocally disposed in said valve housing, the movement thereof being in an opposite direction to the movement of said piston; and F. means operable to vary the pressure acting on said pressure-responsive means, said pressure being of a first magnitude when it is desired to have said pressure-responsive means in its first operating position, and being of a second magnitude when it is desired to have said pressure-responsive means in its second operating position.
Claim 4
Dependent Claim
76 words
poppet means reciprocally disposed in said valve housing, the movement thereof being in an opposite direction to the movement of said piston; and F. means operable to vary the pressure acting on said pressure-responsive means, said pressure being of a first magnitude when it is desired to have said pressure-responsive means in its first operating position, and being of a second magnitude when it is desired to have said pressure-responsive means in its second operating position.
Claim 5
Dependent Claim
35 words
The unloading valve in accordance with claim 1 wherein said piston assembly includes a piston portion and a stem portion and wherein said poppet means is mounted about said stem portion to move relative thereto.
Claim 6
Independent Claim
207 words
A method of operating an unloading vAlve for controlling the capacity of a compression mechanism comprising the steps of: A. selectively communicating the bore of said unloading valve with the discharge side of said compression mechanism when it is desired to operate at rated capacity, and with the suction side of said compression mechanism when it is desired to operate below rated capacity; B. moving a piston reciprocally disposed in the bore of said valve in an upward direction in said bore when said bore is in communication with the suction side of said compression mechanism and moving said piston in a downward direction in said bore when said bore is in communication with the discharge side of said compression mechanism; and C. moving a poppet disposed in said bore in an opposite direction to the movement of said piston, said poppet and piston acting in conjunction with each other to communicate the inlet of said valve with the inlet of said compression mechanism when said bore is in communication with the suction side of said compression mechanism, and communicating the inlet of said valve to the discharge side of said compression mechanism when said bore is in communication with the discharge side of said compression mechanism.
Claim 7
Independent Claim
207 words
A method of operating an unloading vAlve for controlling the capacity of a compression mechanism comprising the steps of: A. selectively communicating the bore of said unloading valve with the discharge side of said compression mechanism when it is desired to operate at rated capacity, and with the suction side of said compression mechanism when it is desired to operate below rated capacity; B. moving a piston reciprocally disposed in the bore of said valve in an upward direction in said bore when said bore is in communication with the suction side of said compression mechanism and moving said piston in a downward direction in said bore when said bore is in communication with the discharge side of said compression mechanism; and C. moving a poppet disposed in said bore in an opposite direction to the movement of said piston, said poppet and piston acting in conjunction with each other to communicate the inlet of said valve with the inlet of said compression mechanism when said bore is in communication with the suction side of said compression mechanism, and communicating the inlet of said valve to the discharge side of said compression mechanism when said bore is in communication with the discharge side of said compression mechanism.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |