US4140439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating compressor having a cut-off device operable within predetermined angular range
Assignee: Panasonic Holdings Corp
•
Filing: 1977-04-14
•
Granted: 1979-02-20
•
Expires: 1997-04-14
Abstract
Abstract A motor compressor has a compression mechanism including compressor components such as a cylinder and a piston and a driving motor coupled to a power source for driving the compressor components through a crank mechanism, and a cut-off device for cutting off the driving motor from the power source. The cut-off device is adapted to cut off the driving motor from the power source when the rotational angle of a crank shaft of the crank mechanism is within a predetermined range at the time of shutting down of operation of the driving motor for minimizing the vibration of the motor compressor.
Inventors
- 👤 Kenichiro Imasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:54
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/02; Y; Y10; Y10S; Y10S417/00; Y10S417/902
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
177 words
A reciprocating compressor comprising: a compression mechanism having compressor components including a cylinder member, a piston member reciprocable within said cylinder member, and crank mechanism means for driving said piston member such that said piston member reciprocates within said cylinder member between a top dead center position and a bottom dead center position; motor means operatively coupled to said crank mechanism means and connectable to an electric power source for operating said crank mechanism means to thereby drive said piston member; detection means for detecting when the relative position of said piston member within said cylinder member is within a predetermined range from said bottom dead center position, said predetermined range not including said top dead center position, and for generating an electric signal representative of such detection; and cut-off means operatively connected to said motor means for cutting off said motor means from said electric power source, said cut-off means being operatively connected to said detection means for receiving therefrom said electrical signal and for initiating said cutting off only upon receipt of said electrical signal.
Claim 2
Dependent Claim
177 words
A reciprocating compressor comprising: a compression mechanism having compressor components including a cylinder member, a piston member reciprocable within said cylinder member, and crank mechanism means for driving said piston member such that said piston member reciprocates within said cylinder member between a top dead center position and a bottom dead center position; motor means operatively coupled to said crank mechanism means and connectable to an electric power source for operating said crank mechanism means to thereby drive said piston member; detection means for detecting when the relative position of said piston member within said cylinder member is within a predetermined range from said bottom dead center position, said predetermined range not including said top dead center position, and for generating an electric signal representative of such detection; and cut-off means operatively connected to said motor means for cutting off said motor means from said electric power source, said cut-off means being operatively connected to said detection means for receiving therefrom said electrical signal and for initiating said cutting off only upon receipt of said electrical signal.
Claim 3
Dependent Claim
32 words
A reciprocating compressor as claimed in claim 1, wherein said compressor components are integrally formed with said motor to form a single unit supported within a hermetically sealed housing by spring means.
Claim 4
Dependent Claim
42 words
A reciprocating compressor as claimed in claim 1, wherein said crank mechanism means comprises a crank shaft, and said detection means comprises means to detect the rotational angle of said shaft as a function of said relative position of said piston member.
Claim 5
Dependent Claim
52 words
A reciprocating compressor as claimed in claim 3, wherein said bottom dead center position of said piston member corresponds to a rotational angle position of said crank shaft of 180°, and said detection means detects when said rotational angle of said crank shaft is within a range of from 120° to 260°.
Claim 6
Dependent Claim
44 words
A reciprocating compressor as claimed in claim 3, wherein said detection means includes a magnet member provided on said crank shaft of said crank mechanism means and a magnetic detection element disposed adjacent to said crank shaft for detecting magnetism of said magnetic member.
Claim 7
Dependent Claim
34 words
A reciprocating compressor as claimed in claim 1, wherein said detection means comprises means to detect a pressure value within said compressor components as a function of said relative position of said piston member.
Claim 8
Dependent Claim
38 words
A reciprocating compressor as claimed in claim 6, wherein said detection means includes a transducer for detecting pressure within said cylinder member of the compressor components to generate an electrical signal which is supplied to said cut-off means.
Claim 9
Dependent Claim
36 words
A reciprocating compressor as claimed in claim 1, wherein said detection means comprises means to detect a vibration load for said compressor components and motor as a function of said relative position of said piston member.
Claim 10
Dependent Claim
36 words
A reciprocating compressor as claimed in claim 8, wherein said detection means includes a transducer for detecting vibration of said compression mechanism and motor to generate an electrical signal which is supplied to said cut-off means.
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) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |