EP0450847A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Refrigerant compressor
Assignee: Toshiba Corp
•
Filing: 1991-03-27
•
Granted: —
•
Expires: 2011-03-27
Abstract
Abstract A refrigerant compressor comprises an hermetic type casing. These is refrigerant circulating in the casing. A compression mechanism in the casing has a first and a second part. These parts are made of iron-based metal and nodular cast iron, respectively. The first and the second parts may be couple slidably.
Inventors
- 👤 Shoichiro Kitaichi
- 👤 Shinobu Sato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 16:21
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/30; F04C18/34; F04C18/344; F04C29/00; F04C29/02; F01; F01C; F01C21/00; F01C21/08; F01C21/10; F01C21/104; F05; F05C; F05C2201/00; F05C2201/04; F05C2201/0433; F05C2201/0436; F05C2201/0439; F05C2201/0442; F05C2225/00; F05C2225/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
65 words
A refrigerant compressor comprising an hermetic type casing (16), refrigerant circulating in the casing (16), and a compression mechanism (18) characterised in that the compression mechanism (18) has a first part comprising an iron-based metal and a second part comprising a nodular cast iron and being in frictional contact with said first part for at least some period of time during operation of said compressor.
Claim 2
Dependent Claim
17 words
A refrigerant compressor as claimed in claim 1, wherein the first and second parts are coupled slidably.
Claim 3
Dependent Claim
18 words
A refrigerant compressor as claimed in claim 1 or 2, wherein the compression mechanism (18) is rotary type.
Claim 4
Dependent Claim
23 words
A refrigerant compressor as claimed in claim 3, wherein the first and second parts are a roller (34) and a cylinder (30), respectively.
Claim 5
Dependent Claim
18 words
A refrigerant compressor as claimed in claim 1 or 2, wherein the compression mechanism (18) is reciprocation type.
Claim 6
Dependent Claim
23 words
A refrigerant compressor as claimed in claim 5, wherein the first and second parts are a piston (70) and a cylinder (72), respectively.
Claim 7
Dependent Claim
25 words
A refrigerant compressor as claimed in claims 3 or 5, wherein the first and second parts are a bearing (28) and a shaft (24), respectively.
Claim 8
Dependent Claim
14 words
A refrigerant compressor as claimed in any preceding claim, wherein the refrigerant comprises 1,1,2,2-tetrafluoroethane.
Claim 9
Dependent Claim
13 words
A refrigerant compressor as claimed in claims 1-7, wherein the refrigerant comprises 1,1,1,2-tetrafluoroethane.
Claim 10
Dependent Claim
22 words
A refrigerant compressor as claimed in claims 8 or 9, further comprising a refrigeration compressor lubricant having mutual solubility with the refrigerant.
Claim 11
Dependent Claim
17 words
A refrigerant compressor as claimed in claim 10, wherein the refrigeration compressor lubricant comprises a polyglycol oil.
Claim 12
Dependent Claim
25 words
A refrigerant compressor as claimed in any preceding claim, wherein the nodular cast iron of said second part has more than 40% of spherical graphite.
Claim 13
Dependent Claim
26 words
A refrigerant compressor as claimed in any of claims 1-11, wherein the nodular cast iron of said second part has more than 70% of spherical graphite.
Claim 14
Dependent Claim
20 words
A refrigerant compressor as claimed in any preceding claim, wherein the iron-based metal of the first part comprises cast iron.
Claim 15
Dependent Claim
20 words
A refrigerant compressor as claimed in any of claims 1-13, wherein the iron-based metal of the first part comprises steel.
Claim 16
Dependent Claim
24 words
A refrigerant compressor as claimed in claim 15, wherein carbon content in said steel is within the range from about 0.05% to about 1.0%.
Claim 17
Dependent Claim
24 words
A refrigerant compressor as claimed in any of claims 1 to 13, wherein the iron-based metal of the first part comprises a sintering alloy.
Claim 18
Dependent Claim
21 words
A refrigerant compressor as claimed in claim 17, wherein a ratio of porosity of said sintering alloy is less than 30%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.