Control component for a spring applied-pressure released hydraulic brake and hydraulic motor
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60T-013/22
출원번호
UP-0346513
(2006-02-02)
등록번호
US-7722131
(2010-06-14)
발명자
/ 주소
Daigre, Richard
출원인 / 주소
White Drive Products, Inc.
대리인 / 주소
Rankin Hill & Clark LLP
인용정보
피인용 횟수 :
1인용 특허 :
24
초록▼
A control for a hydraulic circuit includes a manifold housing and a movable member disposed in the housing. The manifold housing can include a brake port and a pressure port. The brake port is in fluid communication with an associated spring applied-pressure released brake. The pressure port is in f
A control for a hydraulic circuit includes a manifold housing and a movable member disposed in the housing. The manifold housing can include a brake port and a pressure port. The brake port is in fluid communication with an associated spring applied-pressure released brake. The pressure port is in fluid communication with an associated pump. The movable member moves between a first operating position and a second operating position when pressure is not being applied to the pressure port. In the first operating position, the movable member is disposed to allow fluid communication between the associated pump and the associated brake. In the second operating position the movable member is disposed to prohibit fluid communication in a first direction from the associated brake toward upstream the associated pump while allowing fluid communication from upstream the associated pump toward the associated brake in a second direction. The manifold housing can also include first and second motor ports. In this embodiment, each motor port is in fluid communication with an associated motor. In the first operating position, the movable member is disposed to prohibit fluid communication between the first motor port and the second motor port. In the second operating position the movable member is disposed to allow fluid communication between the first motor port and the second motor port.
대표청구항▼
The invention claimed is: 1. A control for a hydraulic circuit comprising: a manifold housing in fluid communication with an associated spring applied-pressure released brake and an associated pump; and a movable member disposed in the housing and movable between a first operating position and a se
The invention claimed is: 1. A control for a hydraulic circuit comprising: a manifold housing in fluid communication with an associated spring applied-pressure released brake and an associated pump; and a movable member disposed in the housing and movable between a first operating position and a second operating position when pressure is not being applied from the associated pump to the housing, in the first operating position the movable member being disposed to allow fluid communication between the associated pump and the associated brake, in the second operating position the movable member being disposed to prohibit fluid communication through the control from upstream the associated brake toward the associated pump while allowing fluid communication through the control from upstream the associated pump toward the associated brake in a second direction, wherein the movable member comprises a first member and a second member, the first member having a cavity that receives the second member and the second member being movable in relation to the first member when pressure is not being applied to the housing from the associated pump. 2. The control of claim 1, wherein the housing includes a pressure port that communicates with the associated pump and a brake port that communicates with the associated brake. 3. The control of claim 2, further comprising a one-way check valve disposed between the pressure port and a pump chamber and a second one-way check valve disposed between the pump chamber and the brake port. 4. The control of claim 1, further comprising first and second motor ports on the housing, each motor port being in fluid communication with an associated motor. 5. The control of claim 4, wherein in the first operating position the movable member being disposed to prohibit fluid communication between the first motor port and the second motor port, in the second operating position the movable member being disposed to allow fluid communication between the first motor port and the second motor port. 6. A hydraulic circuit comprising: a spring applied-pressure released brake; a pressure source; a control in fluid communication with the brake and the pressure source, the control operative in a first position allowing fluid communication between the pressure source and the brake to apply pressure to the brake, and in a second position; and first and second valves, the first valve interposed between the pressure source and a first chamber in the control and the second valve interposed between the first chamber and the brake, wherein the control component includes a rod movable in the first chamber, wherein the rod is movable between an extended position and a retracted position while the control remains in the second operating position, wherein fluid is drawn from downstream the pressure source and through the first valve as the rod is moved from the retracted position towards the extended position and fluid is moved from the first chamber and towards the brake through the second valve as the rod is moved from the extended position towards the retracted position. 7. The circuit of claim 6, further comprising a hydraulic motor in fluid communication with the control, in the first operating position the control prohibits fluid communication between upstream the motor and downstream the motor through the control. 8. The hydraulic circuit of claim 6, further comprising a hydraulic motor in fluid communication with the control, in the second operating position the control allows fluid communication between upstream the motor and downstream the motor through the control. 9. The hydraulic circuit of claim 6, wherein the control is configured to automatically reset from the second position to the first position when pressure is applied by the pressure source. 10. A control for a hydraulic circuit comprising: a manifold housing having a bore; a first port in fluid communication with the bore; a second port in fluid communication with the bore; a third port in fluid communication with the bore; a fourth port in fluid communication with the bore; and a push rod assembly at least partially received in the bore and including a first rod and a second rod, the first rod being received in the bore and including an internal cavity, the second rod being received in the internal cavity and movable within the internal cavity between an extended position and a retracted position, wherein the first rod is movable between a first position and a second position, when in the first position the first rod prohibiting fluid communication between the third port and the fourth port, and when in the second position the first rod being positioned to allow fluid communication between the third port and the fourth port. 11. The control of claim 10, wherein when in the first position the first rod being positioned to allow fluid communication between the first port and the second port. 12. The control of claim 11, wherein when in the second position the first rod being positioned to allow fluid communication between the first port and the second port in a first direction while prohibiting fluid communication between first port and the second port in a second direction. 13. The control of claim 10, wherein the internal cavity defines a pump chamber that is in communication with the first port and the second port. 14. The control of claim 10, further comprising a biasing member for biasing the second rod toward the extended position. 15. The control of claim 10, further comprising a pin that engages the manifold housing and the pump rod assembly first rod for limiting movement of the first rod with respect to the manifold housing. 16. A control for a hydraulic circuit comprising: a manifold housing including a bore in fluid communication with an associated spring applied-pressure released brake and an associated pump; and a first rod disposed in the bore and movable between a first operating position and a second operating position when pressure is not being applied from the associated pump to the bore, in the first operating position the first rod being disposed to allow fluid communication between the associated pump and the associated brake, in the second operating position the first rod being disposed to prohibit fluid communication through the control from upstream the associated brake toward the associated pump in a first direction while allowing fluid communication through the control from upstream the associated pump toward the associated brake in a second direction, wherein the first rod includes a cavity; and a second rod received in the cavity and being moveable in relation to the first rod. 17. The control of claim 16, further comprising first and second valves, the first valve interposed between the pressure source and the cavity and the second valve interposed between the cavity and the brake. 18. The control of claim 17, wherein the second rod is movable between an extended position and a retracted position while the first rod remains in the second operating position, wherein fluid is drawn from downstream the pressure source and through the first valve as the second rod is moved from the retracted position towards the extended position and fluid is moved from the cavity and towards the brake through the second valve as the second rod is moved from the extended position towards the retracted position. 19. The control of claim 16, wherein the first rod moves from the second operating position to the first operating position when pressure is applied to the bore by the associated pump.
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이 특허에 인용된 특허 (24)
Schexnayder Lawrence Francis (Joliet IL), Air pressure modulated brake valve system.
Bigo, Louis; Mangano, Alain; Raisin, Jean-Philippe; Ruzicka, Daniel, Hydraulic circuit having a hydraulic motor equipped with a brake for a vehicle suitable for being towed.
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