US3688647A - Clip retainer - Google Patents

Clip retainer Download PDF

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Publication number
US3688647A
US3688647A US99795A US3688647DA US3688647A US 3688647 A US3688647 A US 3688647A US 99795 A US99795 A US 99795A US 3688647D A US3688647D A US 3688647DA US 3688647 A US3688647 A US 3688647A
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US
United States
Prior art keywords
hub
servomotor
clip
central portion
control valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US99795A
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English (en)
Inventor
Oswald O Kytta
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bendix Corp
Original Assignee
Bendix Corp
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Filing date
Publication date
Application filed by Bendix Corp filed Critical Bendix Corp
Application granted granted Critical
Publication of US3688647A publication Critical patent/US3688647A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/57—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J3/00—Diaphragms; Bellows; Bellows pistons
    • F16J3/06—Bellows pistons

Definitions

  • the servomotor shown in the FIG. 1 has a housing 5 formed by a front shell 12 and a rear shell 14.
  • the servomotor shown in the FIG. 1 has a housing 5 formed by a front shell 12 and a rear shell 14.
  • a diaphragm retainer is positioned against the reinforcing plate by clip means which partially surrounds the hub.
  • the clip means has an inner projection which fits in a slot in the hub to provide a stop for limiting the extent of movement of the control valve upon release. A tab on the projection will bias the projection against one wall of the slot to prevent any play from developing between the control valve and the projection which would cause noise and unwanted wear between the parts.
  • FIG. 1 is a sectional view of a servomotor constructed in accordance with the principles of my invention
  • FIG. 2 is a sectional view taken along line 2-2 of FIG. 1 showing the clip retaining means for holding the diaphragm retainer and plate against the hub;
  • FIG. 3 is a perspective view of the clip retaining means of the type shown in FIG. 2.
  • housing 10 is divided by wall means 16 which separates the interior thereof into a power chamber 18 and a control chamber 20.
  • Hub means 22 which is slidably retained in the rear shell 14, is secured to wall means 16.
  • Control valve means 24 upon actuation by push rod 26 by an operator will interrupt communication between the front chamber 18 and the rear chamber 20 by closing passageway 28 and permitting fluid under pressure to flow through internal bore 30 to passageway 32 into rear chamber 20.
  • a differential pressure force With fluid in the rear chamber 20 at a different pressure than the fluid in front chamber 18, a differential pressure force will be created across wall means 16. This differential pressure force will be transmitted to the hub means 22 to cause it to move.
  • an output force for pressurizing a master cylinder in a braking system (not shown) will be produced.
  • the hub means 22 includes, a cylindrical boss 34 with a 1and 37 adjacent a shoulder 36 located in the internal stepped bore 30.
  • a slot 38 adjacent the land 37 adjacent a shoulder 36 extends to the periphery of the cylindrical boss 34.
  • the wall means 16 has a flexible diaphragm 46 which has a first bead 48 sealingly retained between the front shell 12 and the rear shell 14 by periodically having wing 50 crimped down against edge 52 of the front shell 12.
  • a second bead 54 of the diaphragm mates with concentric rib 56 of the reinforcing plate 57.
  • the reinforcing plate 57 has a smooth outer rim 59 which substantially conforms to the cylindrical shape of the housing 10 and an inner edge 65 which conforms with the inverted key-hole shaped groove 44.
  • a cylindrical retainer member 64 having a similar inverted key-hole shape holds the second head 54 of the diaphragm in the arcuate rib 56 of the plate.
  • the control valve means 24 located in the internal stepped bore 30 has a plunger member 61 which includes a keeper member 58 on the front face and a rearwardly facing annular atmospheric valve seat 60 thereon on the rear face for sealing abutment with a flexible annular rubber poppet member 62.
  • the annular rubber poppet member 62 surrounds a matching tube 63 which transmits an actuation force to seat the poppet member 62.
  • the poppet member 62 has an integral flexible diaphragm portion 66 with a radial outer periphery 68 which is enlarged for sealing engagement with the sidewalls of the internal stepped bore 30.
  • the rubber poppet member 62 is biased against the atmospheric valve seat 60 by a coil spring 70 that surrounds the push rod 26 and is interposed between flange 72 and shoulder 74.
  • the control valve means 24 is retained in the deactivated position, as shown in FIG.
  • the keeper member 58 slides along the land 37 with the flexible rubber poppet 62 first seating on shoulder 82 which closes communication between the front chamber 18 and the rearchamber 20 and then the valve seat 60 moves away from .the poppet 62 to permit atmospheric pressure access to chamber 30 from whence it flows through passageway 32 into the rear chamber 20 to create the pressure differential for operating the servomotor.
  • a clip retaining means 84 is positioned in slot 38.
  • the clip retaining means 84 has a pair of prongs 86, and 87, as shown in FIGS. 2 and 3, which surround the stem section 88 of the keeper member 58 to provide a substantial uniform support around the endkeeper member 58 for stopping rearward movement when the valve means 24 is released.
  • Tab 98 secured to the center of clip retaining means will resiliently bias prongs 86 and 87 against one side of the slot 38 to assure the keeper member is stopped in the same location after each application.
  • the clip retaining means 84 has a central said fluid under pressure flows, said hub means having a radially extending external flange extending along the inner diameter of said flexible diaphragm, said output rod being retained against a reaction member which abuts a shoulder of a land in said internal bore, said hub means having a slot adjacent said land extending to the periphery of said huh;
  • keeper means attached to the control valve, said keeper means being located to slide in an axial direction through the width of said land to position said valve meanswithin said internal bore;
  • clip means located in said slot having a central portion which extends into said internal bore to surround said control valve for limiting the extent of axial movement of said keeper means to substantially the width of the land within said internal bore, said central portion having an arcuate projection extending past the periphery of said hub means at said slot, said clip means having a pair of arms secured to said arcuate projection, each of said arms having a portion which snaps into a groove in said hub means to lock said clip means in a fixed position to retain said flexible diaphragm against said external flange, said external flange transferring the force created by said pressure differential through the hub means to said output rod.
  • arcuate portion 90 which extends past the periphery of the central portion of said clip member includes:
  • a pair of arms 94 and 96 attached to the central arcuate portion 90 of the clip retaining means 84 has a shape to substantially conform to the arcuate portion of the inverted key-hole shaped section of the boss 34 and end section 65 of the diaphragm plate 57.
  • Each of the arms 94 and 96 has a pro jection 97 which snaps into an indentation 100 on the cylindrical boss 34 to fix the position of the clip retaining means 84 in the inserted position.
  • Each of the arms 94 and 96 in conjinction with the central arcuate portion 90 help to hold retainer member 64 tight against the reinforcing plate 57 and seal 92 in thefirst groove 42 to assure a seal between the front and rear chambers 18 and 20, respectively.
  • Each of the arms 94 and 96 are identical to assure a tight fit even though in the process of assembly the location of the tab 98 may in slot 38 be reversed.
  • the clip retaining means 84 will perform the dual duty of limiting the movement of the control valve and holding the diaphragm against the reinforcing plate to provide a way of easily constructing a useable servomotor.
  • a servomotor having a housing divided by wall means into a control chamber and a power chamber and operated by a control valve which allows fluid pressure into the control chamber to create a pressure differential between the control chamber and the power chamber causing the wall means to move and transmit a force to an output rod, the wall means including a flexible diaphragm, means for connecting the wall means to the output rod and for holding the control valve in an operative position, said means comprising:
  • hub means having a stepped internal bore, said internal bore being connected to said control chamber and power chamber by passages through which a resilient tab member for biasing said central portion in said slot to inhibit axial movement of said central portion corresponding to movement of said keeper means.
  • said plate means having a concentric rib which urges said seal against said flange.
  • said flexible diaphragm includes:
  • said bore includes:
  • said pair of prongs providing a uniform support for stopping said keeper means with the control valve in a released position.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Braking Systems And Boosters (AREA)
  • Actuator (AREA)
US99795A 1970-12-21 1970-12-21 Clip retainer Expired - Lifetime US3688647A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9979570A 1970-12-21 1970-12-21

Publications (1)

Publication Number Publication Date
US3688647A true US3688647A (en) 1972-09-05

Family

ID=22276661

Family Applications (1)

Application Number Title Priority Date Filing Date
US99795A Expired - Lifetime US3688647A (en) 1970-12-21 1970-12-21 Clip retainer

Country Status (3)

Country Link
US (1) US3688647A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5110317B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2118925B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005639A (en) * 1975-06-06 1977-02-01 The Bendix Corporation Backing plate means for a servomotor
US4038822A (en) * 1975-12-22 1977-08-02 The Bendix Corporation Fastener means for connecting a cylindrical body to a hub means
US4043251A (en) * 1975-03-14 1977-08-23 Aisin Seiki Kabushiki Kaisha Servomotor
US4173172A (en) * 1977-03-19 1979-11-06 Aisin Seiki Kabushiki Kaisha Tandem brake booster
US4200029A (en) * 1977-05-06 1980-04-29 Aisin Seiki Kabushiki Kaisha Diaphragm brake booster
FR2469589A1 (fr) * 1979-11-09 1981-05-22 Aisin Seiki Servomoteur, en particulier pour circuit de freinage de vehicule
FR2472095A1 (fr) * 1979-12-14 1981-06-26 Tokico Ltd Servo-surpresseur pneumatique
DE3019558A1 (de) * 1980-05-22 1981-11-26 Alfred Teves Gmbh, 6000 Frankfurt Mechanisch gesteuerter kraftverstaerker, insbesondere fuer bremsanlagen von kraftfahrzeugen
DE3210125A1 (de) * 1981-03-30 1982-10-28 Aisin Seiki K.K., Kariya, Aichi Bremskraftverstaerker fuer eine bremsanlage eines kraftfahrzeugs
US4363259A (en) * 1979-05-15 1982-12-14 Aisin Seiki Kabushiki Kaisha Brake booster
DE3220988A1 (de) * 1981-07-01 1983-01-20 Nissin Kogyo K.K., Ueda, Nagano Unterdruck-kraftverstaerker
US4398449A (en) * 1980-01-21 1983-08-16 Tokico Ltd. Pneumatic servo booster
US4434619A (en) 1980-03-24 1984-03-06 Aisen Seiki Kabushiki Kaisha Brake master cylinder assembly
US4491058A (en) * 1982-08-20 1985-01-01 Societe Anonyme Dba Stop key for the valve plunger of a power brake servomotor
DE3332546A1 (de) 1983-09-09 1985-03-28 Alfred Teves Gmbh, 6000 Frankfurt Vakuumbetriebener bremskraftverstaerker
JPS6080963A (ja) * 1983-09-09 1985-05-08 アルフレッド・テヴェス・ゲーエムベーハー バキユ−ムブレ−キ用パワ−ブ−スタ
EP0153238A1 (fr) * 1984-02-22 1985-08-28 BENDIX France Servomoteur d'assistance au freinage
US4542680A (en) * 1981-07-01 1985-09-24 Nissan Kogyo Kabushiki Kaisha Vacuum booster device
US4586427A (en) * 1979-05-10 1986-05-06 Itt Industries, Inc. Vacuum brake booster
FR2579541A1 (fr) * 1985-03-27 1986-10-03 Bendix France Cle butee pour plongeur de valve d'un servomoteur d'assistance au freinage, et servomoteur equipe d'une telle cle
US4619185A (en) * 1983-12-28 1986-10-28 Jidosha Kiki Co., Ltd. Brake booster
US4643076A (en) * 1980-04-21 1987-02-17 Jidosha Kiki Co., Ltd. Controller for valve mechanism of brake booster
FR2591172A1 (fr) * 1985-12-05 1987-06-12 Bendix France Servomoteur a depression d'assistance au freinage
FR2591171A1 (fr) * 1985-12-05 1987-06-12 Bendix France Servomoteur a depression d'assistance au freinage
US4729286A (en) * 1985-09-19 1988-03-08 Bendix France Brake booster comprising a valve plunger stop made of metal wire
US4729284A (en) * 1984-08-16 1988-03-08 Gautier Jean Pierre Stop key for the valve plunger of a braking assistance servomotor and a servomotor equipped with such a key
US4765226A (en) * 1986-04-23 1988-08-23 Bendix France Brake booster with a hinged positioning member
US4787292A (en) * 1986-09-29 1988-11-29 Jidosha Kiki Co., Ltd. Brake booster
US4953446A (en) * 1989-08-14 1990-09-04 Allied-Signal Inc. Key member for retaining a control valve in a hub
GB2239914A (en) * 1989-12-28 1991-07-17 Jidosha Kiki Co Apparatus for preventing withdrawal of a key member in brake booster
US5046399A (en) * 1988-11-11 1991-09-10 Tikico Ltd. Tandem type brake booster
US5158006A (en) * 1990-06-05 1992-10-27 Jidosha Kiki Co., Ltd. Brake booster

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2918908A1 (de) * 1979-05-10 1980-12-11 Teves Gmbh Alfred Vakuumbremskraftverstaerker fuer kraftfahrzeuge
DE3116584C2 (de) * 1980-01-15 1995-11-09 Teves Gmbh Alfred Geberzylinder
GB2068067B (en) * 1980-01-21 1983-11-09 Tokico Ltd Pneumatic servo booster
JPS5853182U (ja) * 1981-10-06 1983-04-11 クラリオン株式会社 自動はんだ付け装置
DE3344730A1 (de) * 1983-12-10 1985-06-20 Alfred Teves Gmbh, 6000 Frankfurt Vakuumbetriebener bremskraftverstaerker

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385167A (en) * 1962-11-21 1968-05-28 Girling Ltd Fluid pressure operated boosters

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1389743A (fr) * 1963-02-21 1965-02-19 Girling Ltd Perfectionnements aux relais amplificateurs ou servo-moteurs à pression de fluide

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385167A (en) * 1962-11-21 1968-05-28 Girling Ltd Fluid pressure operated boosters

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043251A (en) * 1975-03-14 1977-08-23 Aisin Seiki Kabushiki Kaisha Servomotor
US4005639A (en) * 1975-06-06 1977-02-01 The Bendix Corporation Backing plate means for a servomotor
US4038822A (en) * 1975-12-22 1977-08-02 The Bendix Corporation Fastener means for connecting a cylindrical body to a hub means
US4173172A (en) * 1977-03-19 1979-11-06 Aisin Seiki Kabushiki Kaisha Tandem brake booster
US4200029A (en) * 1977-05-06 1980-04-29 Aisin Seiki Kabushiki Kaisha Diaphragm brake booster
US4586427A (en) * 1979-05-10 1986-05-06 Itt Industries, Inc. Vacuum brake booster
US4363259A (en) * 1979-05-15 1982-12-14 Aisin Seiki Kabushiki Kaisha Brake booster
FR2469589A1 (fr) * 1979-11-09 1981-05-22 Aisin Seiki Servomoteur, en particulier pour circuit de freinage de vehicule
FR2528780A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1979-11-09 1983-12-23 Aisin Seiki
DE3042096A1 (de) * 1979-11-09 1981-06-04 Aisin Seiki K.K., Kariya, Aichi Fluiddruckbetaetigter servomotor
US4562696A (en) * 1979-11-09 1986-01-07 Aisin Seiki Kabushiki Kaisha Fluid pressure servomotor
FR2472095A1 (fr) * 1979-12-14 1981-06-26 Tokico Ltd Servo-surpresseur pneumatique
US4590845A (en) * 1979-12-14 1986-05-27 Tokico Ltd. Pneumatic servo booster
US4398449A (en) * 1980-01-21 1983-08-16 Tokico Ltd. Pneumatic servo booster
US4434619A (en) 1980-03-24 1984-03-06 Aisen Seiki Kabushiki Kaisha Brake master cylinder assembly
US4643076A (en) * 1980-04-21 1987-02-17 Jidosha Kiki Co., Ltd. Controller for valve mechanism of brake booster
DE3019558A1 (de) * 1980-05-22 1981-11-26 Alfred Teves Gmbh, 6000 Frankfurt Mechanisch gesteuerter kraftverstaerker, insbesondere fuer bremsanlagen von kraftfahrzeugen
US4406213A (en) * 1980-05-22 1983-09-27 Itt Industries, Inc. Mechanically controlled brake power booster
DE3210125A1 (de) * 1981-03-30 1982-10-28 Aisin Seiki K.K., Kariya, Aichi Bremskraftverstaerker fuer eine bremsanlage eines kraftfahrzeugs
US4472997A (en) * 1981-03-30 1984-09-25 Aisin Seiki Kabushiki Kaisha Brake power multiplying device for automobile brake system
US4542680A (en) * 1981-07-01 1985-09-24 Nissan Kogyo Kabushiki Kaisha Vacuum booster device
US4526089A (en) * 1981-07-01 1985-07-02 Nissin Kogyo Kabushiki Kaisha Vacuum booster device
DE3220988A1 (de) * 1981-07-01 1983-01-20 Nissin Kogyo K.K., Ueda, Nagano Unterdruck-kraftverstaerker
US4491058A (en) * 1982-08-20 1985-01-01 Societe Anonyme Dba Stop key for the valve plunger of a power brake servomotor
JPS6080963A (ja) * 1983-09-09 1985-05-08 アルフレッド・テヴェス・ゲーエムベーハー バキユ−ムブレ−キ用パワ−ブ−スタ
DE3332546A1 (de) 1983-09-09 1985-03-28 Alfred Teves Gmbh, 6000 Frankfurt Vakuumbetriebener bremskraftverstaerker
DE3348362C2 (de) * 1983-09-09 1993-12-16 Teves Gmbh Alfred Vakuumbetriebener Bremskraftverstärker
US4619185A (en) * 1983-12-28 1986-10-28 Jidosha Kiki Co., Ltd. Brake booster
EP0153238A1 (fr) * 1984-02-22 1985-08-28 BENDIX France Servomoteur d'assistance au freinage
US4594937A (en) * 1984-02-22 1986-06-17 Societe Anonyme D.B.A. Servomotor for braking assistance
US4729284A (en) * 1984-08-16 1988-03-08 Gautier Jean Pierre Stop key for the valve plunger of a braking assistance servomotor and a servomotor equipped with such a key
US4672882A (en) * 1985-03-27 1987-06-16 Bendix France Abutment key for the valve plunger of a braking assistance servomotor, and a servomotor equipped with such a key
FR2579541A1 (fr) * 1985-03-27 1986-10-03 Bendix France Cle butee pour plongeur de valve d'un servomoteur d'assistance au freinage, et servomoteur equipe d'une telle cle
EP0198740A1 (fr) * 1985-03-27 1986-10-22 BENDIX France Clé butée pour plongeur de valve d'un servomoteur d'assistance au freinage, et servomoteur équipé d'une telle clé
US4729286A (en) * 1985-09-19 1988-03-08 Bendix France Brake booster comprising a valve plunger stop made of metal wire
FR2591172A1 (fr) * 1985-12-05 1987-06-12 Bendix France Servomoteur a depression d'assistance au freinage
EP0227529A1 (fr) * 1985-12-05 1987-07-01 BENDIX France Société Anonyme dite: Servomoteur à dépression d'assistance au freinage
EP0230169A1 (fr) * 1985-12-05 1987-07-29 BENDIX France Servomoteur à dépression d'assistance au freinage
FR2591171A1 (fr) * 1985-12-05 1987-06-12 Bendix France Servomoteur a depression d'assistance au freinage
US4765226A (en) * 1986-04-23 1988-08-23 Bendix France Brake booster with a hinged positioning member
US4787292A (en) * 1986-09-29 1988-11-29 Jidosha Kiki Co., Ltd. Brake booster
US5046399A (en) * 1988-11-11 1991-09-10 Tikico Ltd. Tandem type brake booster
US4953446A (en) * 1989-08-14 1990-09-04 Allied-Signal Inc. Key member for retaining a control valve in a hub
GB2239914A (en) * 1989-12-28 1991-07-17 Jidosha Kiki Co Apparatus for preventing withdrawal of a key member in brake booster
GB2239914B (en) * 1989-12-28 1994-02-23 Jidosha Kiki Co Brake booster
US5158006A (en) * 1990-06-05 1992-10-27 Jidosha Kiki Co., Ltd. Brake booster

Also Published As

Publication number Publication date
FR2118925B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-10-31
FR2118925A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-08-04
JPS5110317B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1976-04-02

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