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公开(公告)号：US20200309103A1
公开(公告)日：2020-10-01
申请号：US16770625
申请日：2017-12-11
申请人： WABCO Europe BVBA
发明人： Peter Todman
摘要： A piston type pump includes a pump housing having at least one pump inlet, at least one pump outlet, and a piston arrangement connected to a drive shaft configured to, when driven, set the piston arrangement into movement. The piston arrangement includes a first primary stage piston, the first primary stage piston being slidably seated in a first primary stage cylinder formed in the pump housing, and a first secondary stage piston. The first secondary stage piston is slidably seated in a first secondary stage cylinder formed in the first primary stage piston.
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公开(公告)号：US10480465B2
公开(公告)日：2019-11-19
申请号：US15306108
申请日：2015-04-30
申请人： WABCO Europe BVBA
发明人： David Heaps , Phillip Saxton , Peter Todman
摘要： A vacuum pump suitable for mounting to an engine includes a casing, a cavity in the casing having with an inlet and an outlet, a moveable member arranged for rotation inside the cavity, wherein the movable member is movable to draw fluid into the cavity through the inlet and out of the cavity through the outlet so as to induce a reduction in pressure at the inlet, an oil supply conduit for supplying oil from a reservoir to the cavity, and a check valve having a check valve body arranged in the oil supply conduit. The check valve meters the oil flow to the cavity dependent on an oil pressure so that on exceeding an upper oil pressure threshold the supply of oil to the cavity is stopped by means of the check valve.
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公开(公告)号：US20170058846A1
公开(公告)日：2017-03-02
申请号：US15306108
申请日：2015-04-30
申请人： WABCO Europe BVBA
发明人： David Heaps , Phillip Saxton , Peter Todman
IPC分类号： F02M35/10 , F04C29/02 , F04C29/00 , F04C18/344 , F04C25/02
CPC分类号： F02M35/10229 , F04C18/3441 , F04C25/02 , F04C27/009 , F04C29/0007 , F04C29/0057 , F04C29/021 , F04C29/028 , F04C2240/30
摘要： A vacuum pump suitable for mounting to an engine includes a casing, a cavity in the casing having with an inlet and an outlet, a moveable member arranged for rotation inside the cavity, wherein the movable member is movable to draw fluid into the cavity through the inlet and out of the cavity through the outlet so as to induce a reduction in pressure at the inlet, an oil supply conduit for supplying oil from a reservoir to the cavity, and a check valve having a check valve body arranged in the oil supply conduit. The check valve meters the oil flow to the cavity dependent on an oil pressure so that on exceeding an upper oil pressure threshold the supply of oil to the cavity is stopped by means of the check valve.
摘要翻译： 适用于安装在发动机上的真空泵包括壳体，壳体中具有入口和出口的空腔，设置成在空腔内旋转的可移动构件，其中可移动构件可移动以将流体通过 通过出口进入和离开空腔，以便引入入口处的压力降低，用于将油从储存器供应到空腔的供油管道和具有布置在供油管道中的止回阀体的止回阀 。 止回阀根据油压来计量到空腔的油流量，使得在超过上油压阈值时，通过止回阀停止向空腔供油。
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公开(公告)号：US11300110B2
公开(公告)日：2022-04-12
申请号：US16770625
申请日：2017-12-11
申请人： WABCO Europe BVBA
发明人： Peter Todman
摘要： A piston type pump includes a pump housing having at least one pump inlet, at least one pump outlet, and a piston arrangement connected to a drive shaft configured to, when driven, set the piston arrangement into movement. The piston arrangement includes a first primary stage piston, the first primary stage piston being slidably seated in a first primary stage cylinder formed in the pump housing, and a first secondary stage piston. The first secondary stage piston is slidably seated in a first secondary stage cylinder formed in the first primary stage piston.
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公开(公告)号：US11168691B2
公开(公告)日：2021-11-09
申请号：US16340152
申请日：2016-10-10
申请人： WABCO Europe BVBA
发明人： David Heaps , Phillip Saxton , Peter Todman
摘要： A rotary vacuum pump includes a housing defining a pump chamber therein and a rotor extending through a first axial end panel into the pump chamber and carrying at least one vane for rotary movement of the vane within the pump chamber. The rotor comprises an annular axial end face configured to seal against a corresponding contact surface of a second axial end panel. An annular groove for reducing noise generation of the rotary vacuum pump during operation is formed at the annular axial end face of the rotor and/or the contact surface of the second axial end panel.
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公开(公告)号：US20190242383A1
公开(公告)日：2019-08-08
申请号：US16340152
申请日：2016-10-10
申请人： WABCO Europe BVBA
发明人： David Heaps , Phillip Saxton , Peter Todman
CPC分类号： F04C29/06 , F01C21/10 , F01C21/108 , F04C18/344 , F04C25/02 , F04C27/005 , F04C27/006 , F04C29/02 , F04C2220/10 , F04C2240/20 , F04C2240/54
摘要： A rotary vacuum pump includes a housing defining a pump chamber therein and a rotor extending through a first axial end panel into the pump chamber and carrying at least one vane for rotary movement of the vane within the pump chamber. The rotor comprises an annular axial end face configured to seal against a corresponding contact surface of a second axial end panel. An annular groove for reducing noise generation of the rotary vacuum pump during operation is formed at the annular axial end face of the rotor and/or the contact surface of the second axial end panel.
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