Spool detent device for manually operated directional control valve
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0134760
(1987-12-18)
|
우선권정보 |
JP-0024618 (1987-02-06) |
발명자
/ 주소 |
- Kubozono Shigeru (Saitama JPX)
|
출원인 / 주소 |
- Diesel Kiki Co., Ltd. (Tokyo JPX 03)
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인용정보 |
피인용 횟수 :
2 인용 특허 :
2 |
초록
▼
Provided is a device mounted on one end of valve body, remote from a manipulation lever attached to the other end of the spool, for retaining the spool at an offset position other than a position to which the spool is returned by the force of a return spring, wherein a shaft coaxial with the spool i
Provided is a device mounted on one end of valve body, remote from a manipulation lever attached to the other end of the spool, for retaining the spool at an offset position other than a position to which the spool is returned by the force of a return spring, wherein a shaft coaxial with the spool is formed directly therein with a linear guide section, a ring-like projection and a detent section, thereby the spool is retained not by pushing out balls in the direction radial from the axis of the spool, that is in the direction toward the inner wall of a casing, but by dropping the balls in the centripetal direction, that is, the direction toward the axis of the spool.
대표청구항
▼
A spool detent device for manually operated directional control valve, for holding a spool at an offset position other than a position to which said spool is returned by the force of return spring, comprising: i. a spool having a projecting part; ii. a valve body having an outer wall and a plate att
A spool detent device for manually operated directional control valve, for holding a spool at an offset position other than a position to which said spool is returned by the force of return spring, comprising: i. a spool having a projecting part; ii. a valve body having an outer wall and a plate attached to the outer wall; iii. a casing 4 secured to said plate 14 attached to the outer wall of said valve body 1 so as to surround the projecting end part of said concentrically therewith, said casing having an end wall; iv. a partition member 9 secured to the casing so as to divide the inside of the casing into two portions; v. a shaft 3 secured to the end part of said spool within said casing coaxially therewith, the overall length of said shaft extending through the partition member, said shaft having a linear guide section, a ring-like projection connected to said linear guide section through a first intermediary taper guide section which increases in diameter towards said ring-like projection, and a detent section connected to said ring-like projection through a second taper section which decreases in diameter toward said detent section, the diameter of said first intermediary taper section increasing mo gradually than the decrease in diameter of the second taper section; vi. a return spring disposed between said partition member and said plate so as to urge said shaft toward the valve body; vii. a guide sleeve 5 having a flange section and a cylindrical section, said flange section being secured to said partition member 9 coaxially with said shaft 3, and said cylindrical section having a plurality of holes adapted to receive a plurality of balls 6 which are moveable in the direction orthogonal to the axis of the guide sleeve 5; viii. a ball retainer 7 slidably disposed between said guide sleeve flange section and the end wall of said casing, said ball retainer having a conical pushing surface adapted to contact with said balls and a flange 70 contacting the flange section 50 of the guide sleeve 5; and ix. a detent force exerting spring 8 supported between the end wall 42 of said casing 4 and the flange 70 of the ball retainer 7 so as to urge said ball retainer toward said partition member, said spring 8 and said ball retainer 7 being neutralized to urge the ball retainer 7 so that the balls 6 contact the linear guide section 32, and said ball retainer 7 being moved in the axial direction when the balls 6 are pushed radially by the first moderate taper guide section 32a upon moving of the spool 2, whereby the spring 8 is compressed, and the pressure being released from the balls when the balls 6 contact the detent section 34 from the second steep taper guide section 34b, and the pressure of the spring 8 being released at the same time when the ball retainer 7 returns, so that a required retainer is generated.
이 특허에 인용된 특허 (2)
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Habiger Cyril W. (Joliet IL), Control valve with improved centering and detent mechanisms.
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Aspinwall Ronald A. (Detroit MI), Magnetic detent for a control valve.
이 특허를 인용한 특허 (2)
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Bouten, Petrus Henricus Johannes, Double solenoid valve.
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Colby, Luke S., Locking poppet valve.
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