US4396133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wax cylinder
Assignee: ThyssenKrupp Technologies AG
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Filing: 1981-09-30
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Granted: 1983-08-02
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Expires: 2001-09-30
Abstract
Abstract A wax cylinder for a wax spraying machine is disclosed. The wax cylinder includes a housing, an ejection cylinder having a chamber mounted in the housing. An elongated piston is slidably mounted in the chamber and includes a pressure face for pressurizing and urging wax in the chamber out through an ejection opening. The chamber is maintained in constant fluid communication with a feed line for feeding wax into the chamber throughout the stroke of the piston. A check valve is utilized to prevent back flow of wax through the feed line. Air is prevented from flowing into the chamber during the return stroke of the piston.
Inventors
- 👤 Georg Glaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:28
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/53; B29C67/00; B29C67/24; B29C67/241
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
189 words
A wax cylinder for a wax spraying machine comprising a housing, an ejection cylinder having a chamber mounted in said housing, an elongated piston slidably mounted in said chamber of said ejection cylinder and having a pressure face, said piston having a longitudinal groove extending therealong and a feed passage extending therethrough from a first end connected to said groove to a second open end in said pressure face for communication with said ejection cylinder chamber, feed line means communicating with said longitudinal groove for passing wax in a feed direction through the housing and the ejection cylinder to said longitudinal groove, a check valve in said feed line means for preventing the return flow of wax opposite the feed direction, means for preventing the rotation of said piston relative to said ejection cylinder in said chamber, means for ejecting wax from said chamber, and means for actuating longitudinal movement of said piston in said chamber to urge said pressure face into engagement with the wax in said chamber, said pressure face being operative responsive to said actuating movement to pressurize the wax for ejection through said ejecting means.
Claim 2
Dependent Claim
189 words
A wax cylinder for a wax spraying machine comprising a housing, an ejection cylinder having a chamber mounted in said housing, an elongated piston slidably mounted in said chamber of said ejection cylinder and having a pressure face, said piston having a longitudinal groove extending therealong and a feed passage extending therethrough from a first end connected to said groove to a second open end in said pressure face for communication with said ejection cylinder chamber, feed line means communicating with said longitudinal groove for passing wax in a feed direction through the housing and the ejection cylinder to said longitudinal groove, a check valve in said feed line means for preventing the return flow of wax opposite the feed direction, means for preventing the rotation of said piston relative to said ejection cylinder in said chamber, means for ejecting wax from said chamber, and means for actuating longitudinal movement of said piston in said chamber to urge said pressure face into engagement with the wax in said chamber, said pressure face being operative responsive to said actuating movement to pressurize the wax for ejection through said ejecting means.
Claim 3
Dependent Claim
19 words
A wax cylinder as set forth in claim 1, wherein said displacement piston is mounted in an overhung position.
Claim 4
Dependent Claim
69 words
A wax cylinder as set forth in claims 1 or 2, wherein said actuating means comprises a hydraulic cylinder having a stroke, the stroke being of a length equal to the length of said ejection cylinder, and wherein said longitudinal groove has a length equal to the stroke length, and said longitudinal groove being in fluid communication with said feed line means throughout the total displacement of said piston.
Claim 5
Dependent Claim
30 words
A wax cylinder as set forth in claim 3, wherein said rotation locking means comprises a rod connected to said housing and extending into a guide opening in said piston.
Claim 6
Dependent Claim
61 words
A wax cylinder as set forth in claim 1, further comprising piston rings sealingly engaging said piston to said ejection cylinder at opposite ends of said piston, said piston rings being located on said piston such that said feed line means is communicated with said longitudinal groove at a position intermediate said piston rings through the total displacement of said piston.
Claim 7
Dependent Claim
61 words
A wax cylinder as set forth in claim 2, further comprising piston rings sealingly engaging said piston to said ejection cylinder at opposite ends of said piston, said piston rings being located on said piston such that said feed line means is communicated with said longitudinal groove at a position intermediate said piston rings through the total displacement of said piston.
Claim 8
Dependent Claim
61 words
A wax cylinder as set forth in claim 3, further comprising piston rings sealingly engaging said piston to said ejection cylinder at opposite ends of said piston, said piston rings being located on said piston such that said feed line means is communicated with said longitudinal groove at a position intermediate said piston rings through the total displacement of said piston.
Claim 9
Dependent Claim
61 words
A wax cylinder as set forth in claim 4, further comprising piston rings sealingly engaging said piston to said ejection cylinder at opposite ends of said piston, said piston rings being located on said piston such that said feed line means is communicated with said longitudinal groove at a position intermediate said piston rings through the total displacement of said piston.
Claim 10
Dependent Claim
67 words
A wax cylinder as set forth in claim 2, wherein said actuating means comprises a hydraulic cylinder having a stroke, the stroke being of a length equal to the length of said ejection cylinder, and wherein said longitudinal groove has a length equal to the stroke length, and said longitudinal groove being in fluid communication with said feed line means throughout the total displacement of said piston.
Claim 11
Dependent Claim
61 words
A wax cylinder as set forth in claim 9, further comprising piston rings sealingly engaging said piston to said ejection cylinder at opposite ends of said piston, said piston rings being located on said piston such that said feed line means is communicated with said longitudinal groove at a position intermediate said piston rings through the total displacement of said piston.
Claim 12
Dependent Claim
22 words
A wax cylinder as set forth in claim 10, wherein said longitudinal groove is formed on the outer surface of said piston.
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) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |