GB1450099A - Actuating force generating devices - Google Patents

Actuating force generating devices

Info

Publication number
GB1450099A
GB1450099A GB4881073A GB4881073A GB1450099A GB 1450099 A GB1450099 A GB 1450099A GB 4881073 A GB4881073 A GB 4881073A GB 4881073 A GB4881073 A GB 4881073A GB 1450099 A GB1450099 A GB 1450099A
Authority
GB
United Kingdom
Prior art keywords
piston
cylinder
rod
rearmost
connecting rod
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
Application number
GB4881073A
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.)
Tokico Ltd
Original Assignee
Tokico Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP4487773A external-priority patent/JPS49129072A/ja
Priority claimed from JP4487873A external-priority patent/JPS561484B2/ja
Application filed by Tokico Ltd filed Critical Tokico Ltd
Publication of GB1450099A publication Critical patent/GB1450099A/en
Expired legal-status Critical Current

Links

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
    • B60T13/12—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 liquid
    • B60T13/22—Brakes applied by springs or weights and released hydraulically
    • 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
    • B60T13/26—Compressed-air systems

Abstract

1450099 Hydraulic actuators TOKICO Ltd 19 Oct 1973 [20 April 1973 (2)] 48810/73 Heading F1D [Also in Division F2] An actuating-force generating-device comprises a multi-stage cylinder body 1, Fig. 1, having a plurality of cylinders 2, 3, of different diameters and arranged in series, a piston, 4 or 6, slidable in each cylinder, a piston-rod 8 fixed to the foremost piston 4 and having an actuating end projecting from the forward end of the cylinder body, a container 12 at the rear end of the cylinder body, each cylinder having a port 19 or 20 in its forward end for admission and discharge of hydraulic fluid, one or more connecting rods, e.g. 16, extending rearwardly from the piston-rod or, as shown, from the foremost piston 4 through the rearmost piston 6 in sealing relation therewith and into the container 12, resilient means, as shown, springs 29, 28, coupled to the rearmost piston 6 and the connecting rod 16 for transmitting a portion of the force of the resilient means to the rearmost piston and the remainder of the force to the connecting rod and thereby to the piston-rod 8, and means, as shown, a stop 18 fixed to the connecting rod 16, for coupling the rearmost piston and the connecting rod 16 for movement forwardly so that when the rearmost piston 6 is blocked by hydraulic fluid in its cylinder 3, only the remainder of the force of the resilient means is transmitted to the piston-rod 8 but when the rearmost piston is not so blocked, the entire force of the resilient means is transmitted to the piston-rod. In operation, when a vehicle brake actuated by piston-rod 8 is required to be applied for purposes other than a sudden stop, an electromagnetic valve 42 is de-energized, whereupon port 79 is connected to a tank 46, so pressure to the left of piston 4 is relieved, and spring 28 applies the brake via seat 75, connecting rod 16 and piston 4. If a sudden stop is required, cylinder 3 is de-pressurized in a similar manner, as well as cylinder 2, whereupon each spring urges its respective piston leftwards. If cylinder 2 is discharged more quickly than cylinder 3, the brake is first applied by spring 28 only. Subsequently, when piston 6 makes contact with the stop 18 fixed to connecting rod 16, spring 29 also acts on piston 4 via piston 6 and stop 18. If valve 42 fails to permit discharge therethrough from cylinder 2, cylinder 2 is de-pressurized via a checkvalve 32 and cylinder 3. An alternative use for the invention is in a press machine.
GB4881073A 1973-04-20 1973-10-19 Actuating force generating devices Expired GB1450099A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4487773A JPS49129072A (en) 1973-04-20 1973-04-20
JP4487873A JPS561484B2 (en) 1973-04-20 1973-04-20

Publications (1)

Publication Number Publication Date
GB1450099A true GB1450099A (en) 1976-09-22

Family

ID=26384849

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4881073A Expired GB1450099A (en) 1973-04-20 1973-10-19 Actuating force generating devices

Country Status (1)

Country Link
GB (1) GB1450099A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000227A (en) * 1977-06-10 1979-01-04 Jungheinrich Kg Hydraulic lifting device
DE4420136A1 (en) * 1994-06-09 1995-12-14 Rexroth Mannesmann Gmbh Hydraulic valve, especially for releasing a spring brake
FR2780691A1 (en) * 1998-07-01 2000-01-07 Knorr Bremse Systeme BRAKE DEVICE WITH ACCUMULATING SPRINGS, AND EMERGENCY NEUTRALIZATION DEVICE FOR SAID BRAKING DEVICE
DE19849736A1 (en) * 1998-10-28 2000-05-11 Knorr Bremse Systeme Adjustment for pre-loaded spring has first and second thrust holders and support surfaces, brake piston and housing

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000227A (en) * 1977-06-10 1979-01-04 Jungheinrich Kg Hydraulic lifting device
GB2000227B (en) * 1977-06-10 1982-02-24 Jungheinrich Kg Hydraulic lifting device
DE4420136A1 (en) * 1994-06-09 1995-12-14 Rexroth Mannesmann Gmbh Hydraulic valve, especially for releasing a spring brake
FR2780691A1 (en) * 1998-07-01 2000-01-07 Knorr Bremse Systeme BRAKE DEVICE WITH ACCUMULATING SPRINGS, AND EMERGENCY NEUTRALIZATION DEVICE FOR SAID BRAKING DEVICE
DE19849736A1 (en) * 1998-10-28 2000-05-11 Knorr Bremse Systeme Adjustment for pre-loaded spring has first and second thrust holders and support surfaces, brake piston and housing
DE19849736B4 (en) * 1998-10-28 2006-10-19 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH adjusting

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee