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US 8,044,310 B2Granted
Combination pressure switch
AssigneeCondor-Werke Gebr. Frede GmbH & Co. KG.
InventorCraig R. Wildman
Life of this patent
Estimating the term…
Abstract
A combination switch including a pressure switch moveable between closed and open positions in response to a working pressure of a fluid, an unloader valve moveable between open and closed positions, a mechanical interconnection between the pressure switch and the unloader valve and operable to move the unloader valve in response to movement of the pressure switch, and a mechanical lever selectively operable to move the pressure switch between the closed and the open position.
Claims19
A combination switch, comprising:
- (a) a pressure switch moveable between a closed position and an open position in response to a working pressure of a fluid, the pressure switch comprising a pair of electrical contacts that are electrically connected in the closed position and electrically disconnected in the open position;
- (b) an unloader valve moveable between open and closed positions;
- (c) a mechanical interconnection between the pressure switch and the unloader valve and operable to move the unloader valve in response to movement of the pressure switch;
- and
- (d) a mechanical lever selectively operable to electrically connect and disconnect the pair of electrical contacts independent of movement of the pressure switch in response to a working pressure of a fluid, the manual lever further moving the unloader valve from its closed position to its open position.
2 more elements
A combination switch, comprising:
- (a) a housing having a longitudinal axis, a first fluid inlet at a first end, and a second fluid inlet at a second end;
- (b) a pressure switch disposed at the first end of the housing in fluid communication with the first fluid inlet and moveable between a closed position and an open position in response to a working pressure of a fluid, the pressure switch comprising a pair of electrical contacts that are electrically connected in the closed position and electrically disconnected in the open position;
- (c) an unloader valve disposed at the second end of the housing and moveable between:
- (i) a closed position in which the second fluid inlet is blocked;
- and
- (ii) an open position in which the second fluid inlet is connected to a fluid outlet;
- and
- (d) a mechanical lever operable to move the pressure switch and the unloader valve between the opened and the closed positions independent of movement of the pressure switch in response to a working pressure of a fluid, the manual lever further moving the unloader valve from its closed position to its open position.
5 more elements
A fluid operated device, comprising:
- (a) a combination switch including:
- (i) a pressure switch moveable between a closed position and an open position in response to a working pressure of a fluid, the pressure switch comprising a pair of electrical contacts that are electrically connected in the closed position and electrically disconnected in the open position;
- (ii) an unloader valve moveable between open and closed positions;
- (iii) a mechanical interconnection between the pressure switch and the unloader valve operable to move the unloader valve in response to the movement of the pressure switch;
- and
- (iv) a mechanical lever selectively operable to move the pressure switch and the unloader valve between the closed and the open position independent of movement of the pressure switch in response to a working pressure of a fluid;
- and
- (b) a pressure operated pump fluidly connected with the combination switch.
5 more elements
Dependencies are inferred from the claim text.