Source: http://www.google.com/patents/USRE35136?dq=6,993,661
Timestamp: 2016-02-13 10:01:13
Document Index: 339033673

Matched Legal Cases: ['art 53', 'art 53', 'art 51', 'art 5', 'art 2', 'art 5', 'art 5', 'art 5', 'art 5']

Patent USRE35136 - Actuator of diaphragm type - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsAn actuator (1) of a diaphragm type which comprises an actuator case (2,3), a diaphragm (5) housed in the actuator case, a diaphragm plate (4) attached to the diaphragm for moving together with the diaphragm according to introduction of negative or atmospheric pressure into a negative pressure chamber...http://www.google.com/patents/USRE35136?utm_source=gb-gplus-sharePatent USRE35136 - Actuator of diaphragm typeAdvanced Patent SearchPublication numberUSRE35136 EPublication typeGrantApplication numberUS 08/330,248Publication dateJan 2, 1996Filing dateOct 25, 1994Priority dateMar 22, 1991Fee statusPaidAlso published asDE4205756A1, DE4205756C2, US5249508Publication number08330248, 330248, US RE35136 E, US RE35136E, US-E-RE35136, USRE35136 E, USRE35136EInventorsJiro Hasegawa, Ikuo Nakamura, Tadashi HishinumaOriginal AssigneeJidosha Denki Kogyo Kabushiki KaishaExport CitationBiBTeX, EndNote, RefManPatent Citations (4), Referenced by (7), Classifications (9), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetActuator of diaphragm type
US RE35136 EAbstract
1. An actuator of a diaphragm type for controlling a device mounted on an automotive vehicle, comprising:an actuator casing having first and second cup-shaped casing halves engaged with each other, the second casing half having an opening through a center part thereof; a diaphragm disposed between said first and second casing halves of said actuator casing and forming a negative pressure chamber together with said first casing half of said actuator casing, said diaphragm having a plate fitting portion in a center part thereof, said plate fitting portion having a center aperture therethrough .[.and a annular rib surrounding the center aperture.].; a diaphragm plate disposed in the actuator casing and secured to said plate fitting portion of said diaphragm, said diaphragm plate having a projecting portion with a cable connecting member projecting through the opening in said second casing half of said actuator casing; a conical spring disposed between said diaphragm plate and said first casing half of said actuator casing, said conical spring urging said diaphragm plate and said plate fitting portion toward said second casing half of said actuator casing; and said diaphragm further having an annular expansive portion having a semicircularly curved section extending toward said second casing half and located adjacent to the plate fitting portion and spaced from said diaphragm plate to form an air space with said diaphragm plate. .Iadd.2. An actuator of a diaphragm type as set forth in claim 1, wherein said diaphragm further includes an annular rib surrounding the annular expansive portion. .Iaddend. Description
This invention relates to an actuator of a diaphragm type used for actuating, for example, a throttle value in an automatic cruising control system which controls automatically a speed of an automotive vehicle at a set cruising speed.
Heretofore there has been used an actuator of a diaphragm type shown in FIGS. 3 and 4 for actuating the throttle valve in the automatic cruising control.
The diaphragm plate 54 is formed with a cable connector 54a engaged with a throttle cable 60 connected to a throttle valve (not shown) of the vehicular engine, a recess 54b for engaging with the plate fitting part 53c of the diaphragm 53 and the projection 54c for fitting a conical spring 55. The diaphragm plate 54 is attached to the diaphragm 53 by fitting the plate fitting part 53c of the diaphragm 53 into the recess 54b of the diaphragm plate 54 according to the function of the elasticity of the diaphragm 53.
The conical spring 55 is disposed between the diaphragm plate 54 and the first casing 51 of the actuator case by engaging its both ends to the projection 54c of the diaphragm plate 54 and the spring fitting part 51c of the first casing 51. Thus, a negative pressure chamber 56 is formed between the first casing 51 and the diaphragm 53 attached with the diaphragm plate 54 enerigized by the conical spring 55 in the leftward direction in FIG. 3.
The construction of the actuator of the diaphragm type for controlling a device mounted on an automatic vehicle according to this invention in order to accomplish the above-mentioned object is characterized in that it comprises an actuator case, a diaphragm housed in the actuator case, formed with a plate fitting part in the center part thereof and forming a negative pressure chamber together with the actuator case, and a diaphragm plate connected to the device and attached to the plate fitting part of the diaphragm for moving in companmy with the diaphragm according to introduction of negative pressure or atmospheric pressure into the negative pressure chamber so as to actuate the device, and the diaphragm is formed with one or both of an annular rib having a thick-walled section and an annular expansive portion having a semicircularly curved section surrounding the plate fitting part attached thereto.
The diaphragm 5 is further formed with an annular expansive portion 5d having a thickness similar to that of another part of the diaphragm body and a semicircularly curved section adjacent to and surrounding the plate fitting part 5c with the semicircularly curved section being spaced from the diaphragm plate plate 4 to form an air space 5f therebetween. Additionally, the diaphragm 5 is also formed with an annular rib 5c having a thick-walled section and good rigidity as compared with another part of the diaphragm body, and projecting on the side of the second casing 3 in the vicinity of the outer periphery of the annular expansive portion 5d in this embodiment.
The conical spring 6 is disposed between the diaphragm plate 4 and the first casing 2 of the actuator case by engaging its both ends to the projection 4c of the diaphragm plate 4 and the spring fitting part 2c of the first casing 2, respectively. Thus a negative pressure chamber 7 is formed between the first casing 23 and the diaphragm 5 attached to the diaphragm plate 4 and enerigized by the conical spring 6 in the leftward direction in FIG. 1.
In this time, the annular rib 5e formed in the thick-walled shape on the diapahragm 5 prevents the plate fitting part 5c from being pulled outwardly even if the pressure in the negative pressure chamber 7 is reduced excessively by some cause, and the other parts of the diaphragm 5 are deformed. In addition to above, the annular expansive portion 5d disposed between the annular rib 5e and the plate fitting part 5c on the diaphragm 5 absorbs tensile force to be applied on the plate fitting part 5c by deformation of portion 5d even if the annular rib 5e cannot prevent the tensile force from being applied on the plate fitting part 5c sufficiently.
As described above, in the actuator of the diaphragm type according to this invention having the aforementioned construction, the annular rib formed on the diaphragm prevents the center part of the diaphragm from being pulled outwardly even if the pressure in the negative pressure chamber is reduced excessively and the other parts of the diaphragm are deformed by the excessive force. The annular expansive portion 5d formed on the diaphragm isolates the center part of the diaphragm from the tensile force applied on the diaphragm by its own deformation even if the pressure in the neagative pressure chamber is reduced excessively. Therefore, the center part of the diaphragm is hard to be deformed and the diaphragm is never disengaged from the diaphragm plate even if the excessive force is applied on the diaphragm from one cause or another. An excellent effect can be obtained since the air is prevented from flowing into the negative pressure chamber and it is possible to actuate the device mounted on the automotive vehicle with high accuracy, such as the throttle valve of the vehicular engine, for example.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4559864 *Mar 29, 1984Dec 24, 1985Aisin Seiki Kabushiki KaishaActuatorUS4586427 *Apr 19, 1984May 6, 1986Itt Industries, Inc.Vacuum brake boosterUS4729287 *Oct 10, 1986Mar 8, 1988Alfred Teves GmbhVacuum-operated brake power booster having diaphragm edge bead retention memberDE2546480A1 *Oct 17, 1975May 6, 1976Magneti Marelli SpaKapsel des mit unterdruck arbeitenden fruehzuendungs-korrektors fuer zuendverteiler von brennkraftmotoren* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS5762315Apr 10, 1996Jun 9, 1998Fisher Controls International, Inc.Valve actuator with pliable pressure conversion deviceUS5853022 *Apr 10, 1996Dec 29, 1998Fisher Controls International, Inc.Valve actuator with instrument mounting manifoldUS5975487Apr 25, 1997Nov 2, 1999Fisher Controls International, Inc.Rotary valve actuator with high-low-high torque linkageUS5979864Apr 25, 1997Nov 9, 1999Fisher Controls International, Inc.Double convoluted pliable pressure conversion unitUS5988205Apr 25, 1997Nov 23, 1999Fisher Controls International, Inc.Rotary valve actuator with zero lost motion universal connectionUS6000675Apr 25, 1997Dec 14, 1999Fisher Controls International, Inc.Tension-spring return rotary valve actuatorUS6062534Apr 25, 1997May 16, 2000Fisher Controls InternationalDouble acting rotary valve actuator* Cited by examinerClassifications U.S. Classification92/99, 92/104, 92/105International ClassificationF15B15/10, F16J3/02Cooperative ClassificationF16J3/02, F15B15/10European ClassificationF15B15/10, F16J3/02Legal EventsDateCodeEventDescriptionApr 16, 1997FPAYFee paymentYear of fee payment: 4Apr 16, 1997SULPSurcharge for late paymentMar 15, 2001FPAYFee paymentYear of fee payment: 8RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services