Vacuum pump designed as displacement pump |
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| 申请号 | US3644702D | 申请日 | 1970-03-27 | 公开(公告)号 | US3644702A | 公开(公告)日 | 1972-02-22 |
| 申请人 | BALZERS PATENT BETEILIG AG; | 发明人 | KOHLER MARCEL; | ||||
| 摘要 | In a vacuum pump designed as a displacement pump for drawing off vapor-containing gases and having a discharge point communicating with a storage vessel having an outlet aperture for the pumped gases and containing a supply of sealing fluid covering a discharge valve, heating means are provided to heat at least that portion of the wall of the storage vessel located above the level of the sealing fluid therein. The heating means may include a double jacket heated by a through-flowing heating medium, or may be an electric heating jacket surrounding the upper portion of the storage vessel. A line may be provided to return sealing fluid from the storage vessel into the pump, this line being in heat-conducting relation with that portion of the vessel wall located above the fluid level. | ||||||
| 权利要求 | 1. In a vacuum pump designed as a displacement pump for drawing off vapor-containing gases and including a pump housing wall having a discharge port communicating with a walled storage vessel having an outlet aperture for the pumped gases and containing a supply of sealing fluid partly filling said vessel and covering a discharge valve in the discharge port, the improvement comprising heating means operable to heat at least that portion of the vessel wall located above the level of the sealing fluid in said vessel. 2. In a vacuum pump, the improvement claimed in claim 1, including a line for the return of sealing fluid from said storage vessel into said pump, said line being connected, for heat conduction, with that portion of the storage vessel wall located above the sealing fluid level therein. 3. In a vacuum pump designed as a displacement pump for drawing off vapor-containing gases and including a pump housing wall having a discharge port communicating with a walled storage vessel having an outlet aperture for the pumped gases and containing a supply of sealing fluid covering a discharge valve in the discharge port, the improvement comprising heating means operable to heat at least that portion of the vessel wall located above the level of the sealing fluid in said vessel; that portion of the vessel wall located above the sealing fluid level being formed as a double jacket heatable by a through-flowing heating medium. 4. In a vacuum pump designed as a displacement pump for drawing off vapor-containing gases and including a pump housing wall having a discharge port communicating with a walled storage vessel having an outlet aperture for the pumped gases and containing a supply of sealing fluid covering a discharge valve in the discharge port, the improvement comprising heating means operable to heat at least that portion of the vessel wall located above the level of the sealing fluid in said vessel; said heating means including electric heating means surrounding at least that portion of the vessel wall located above the sealing fluid level. 4. In a vacuum pump, the improvement claimed in claim 4, in which said electric heating means is an electric heating jacket. |
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