WO1996012287B1 - Solenoid with magnetic control of armature velocity - Google Patents

Solenoid with magnetic control of armature velocity

Info

Publication number
WO1996012287B1
WO1996012287B1 PCT/US1995/012890 US9512890W WO9612287B1 WO 1996012287 B1 WO1996012287 B1 WO 1996012287B1 US 9512890 W US9512890 W US 9512890W WO 9612287 B1 WO9612287 B1 WO 9612287B1
Authority
WO
WIPO (PCT)
Prior art keywords
armature
pole piece
groove
solenoid
projection means
Prior art date
Application number
PCT/US1995/012890
Other languages
French (fr)
Other versions
WO1996012287A1 (en
Filing date
Publication date
Priority claimed from US08/331,023 external-priority patent/US5565832A/en
Application filed filed Critical
Priority to JP8513330A priority Critical patent/JPH09507002A/en
Priority to AU39993/95A priority patent/AU692955B2/en
Priority to BR9506415A priority patent/BR9506415A/en
Priority to MX9602343A priority patent/MX9602343A/en
Publication of WO1996012287A1 publication Critical patent/WO1996012287A1/en
Publication of WO1996012287B1 publication Critical patent/WO1996012287B1/en

Links

Abstract

A low-noise solenoid has an armature (15) with a projecting ridge (23) receivable within a groove (25) in a pole piece (17). As the ridge (23) enters the groove (25), the magnetic force which opposes a return spring (21) decreases until there is equilibrium whereat the armature (15) remains suspended without impacting upon the pole piece (17).

Claims

AMENDED CLAIMS[received by the International Bureau on 04 April 1996 (04.04.96); original claim 2 cancelled; remaining claims amended and renumbered 1-5 (2 pages)]
1. In a solenoid actuator selectively energizeable by a source of electric current, and having a core tube with two opposite ends and a winding circumscribing said core tube, a stationary pole piece mounted at one end of said core tube, and an axially reciprocable armature slidably mounted in said core tube for movement between an energized position adjacent said pole piece when said winding is energized and a deenergized position distal from said pole piece, the improvement wherein one of said movable armature and said stationary pole piece has axially extending projection means comprising a circular ridge having a rectangular cross section, and the other of said movable armature and said stationary pole piece has a complementary groove in the form of a circular channel with a rectangular cross section having a width slightly than the width of said ridge for receiving said projections means when said armature is in said energized position at an equilibrium position whereat said armature floats with no mechanical connection between said armature and stationary pole piece.
2. A solenoid in accordance with claim 1 wherein said armature comprises said projection means and said groove is in said pole piece.
3. A solenoid in accordance with claim 1 wherein said other of said movable armature and said stationary pole piece comprises an elastomeric member seated within said groove, said groove being wider than the width of said member for leaving a recess into which said projection means can be received.
4. A solenoid in accordance with claim 1 further comprising bias means mounted within said core tube for applying a return force to said armature for urging said armature toward said deenergized position, said winding having an operating current range in which said pole piece exerts a magnetic force on said armature greater than said return force when said projection means is out of said groove and said pole 1 3
piece exerts a magnetic force on said armature equal to the return force at an equilibrium position of said armature at which said projection means is received in said groove.
5. A solenoid in accordance with claim 4 wherein said projection means is spaced from the floor of said groove at said equilibrium position.
PCT/US1995/012890 1994-10-17 1995-10-16 Solenoid with magnetic control of armature velocity WO1996012287A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP8513330A JPH09507002A (en) 1994-10-17 1995-10-16 Armature speed magnetic control solenoid
AU39993/95A AU692955B2 (en) 1994-10-17 1995-10-16 Solenoid with magnetic control of armature velocity
BR9506415A BR9506415A (en) 1994-10-17 1995-10-16 Solenoid and solenoid actuator
MX9602343A MX9602343A (en) 1994-10-17 1995-10-16 Solenoid with magnetic control of armature velocity.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/331,023 US5565832A (en) 1994-10-17 1994-10-17 Solenoid with magnetic control of armature velocity
US08/331,023 1994-10-17

Publications (2)

Publication Number Publication Date
WO1996012287A1 WO1996012287A1 (en) 1996-04-25
WO1996012287B1 true WO1996012287B1 (en) 1996-06-20

Family

ID=23292297

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/012890 WO1996012287A1 (en) 1994-10-17 1995-10-16 Solenoid with magnetic control of armature velocity

Country Status (7)

Country Link
US (1) US5565832A (en)
JP (1) JPH09507002A (en)
AU (1) AU692955B2 (en)
BR (1) BR9506415A (en)
CA (1) CA2178828A1 (en)
MX (1) MX9602343A (en)
WO (1) WO1996012287A1 (en)

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