GB1397795A - Bumper bar assembly for motor vehicles - Google Patents
Bumper bar assembly for motor vehiclesInfo
- Publication number
- GB1397795A GB1397795A GB2244872A GB2244872A GB1397795A GB 1397795 A GB1397795 A GB 1397795A GB 2244872 A GB2244872 A GB 2244872A GB 2244872 A GB2244872 A GB 2244872A GB 1397795 A GB1397795 A GB 1397795A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- rod
- grooves
- shock absorber
- passage means
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/32—Fluid shock absorbers, e.g. with coaxial coil springs
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
- F16F9/346—Throttling passages in the form of slots arranged in cylinder walls
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/48—Arrangements for providing different damping effects at different parts of the stroke
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
1397795 Bumpers FICHTEL & SACHS AG 12 May 1972 [15 May 1971] 22448/72 Heading B7J [Also in Division F2] A bumper bar assembly for motor vehicles comprises at least one shock absorber acting on a bumper bar, the or each shock absorber comprising a piston-rod 2, Fig. 2, extending into a liquid-filled cylinder 1 and carrying a piston 3 affixed thereto by riveting at pin 13, the piston 3 separating two liquid chambers, one shown at 16 and the second defined between piston 3 and a displaceable boundary surface formed by an annular piston 5 floating on the rod 2 against the elastic resistance of a spring 7 (and being of negligible size as shown in the extended position of the shock absorber prior to an impact). On impact, piston 3 is moved by rod 2 away from piston 5 while liquid flows through throttled passage means formed by grooves 4 in the inner surface of the cylinder wall, into the second chamber, and the boundary surface formed by the floating piston 5 is displaced so as to modify the total volume of the two liquid chambers in response to the change in immersion volume of rod 2, the throttling effect of the passage means 4 being such that, after an initial increase, the force provided by the shock absorber remains approximately constant throughout the remainder of the piston stroke. The grooves 4 as shown are rectilinear and have straight, tapering sides and are of uniform depth, but they may be of various shapes such as curved grooves, or grooves 604, Fig. 6, of constant width, and depth varying parabolically in the longitudinal direction. In Fig. 6, a protective tube 622 is provided surrounding part of cylinder 601 and having a base 642, which carries the end of piston-rod 602 and which also acts as the base of an attachment part 640 having transverse apertures 644 to receive a securing pin for attachment to the bumper bar or a vehicle body. As an alternative to grooves in the cylinder wall, such as in Fig. 9 the passage means between the two liquid chambers may be formed by borings 950 in piston 903 which are normally covered by a valve plate 948 under the action of spring washers 947. On another form, Fig. 4, the piston-rod 425 is a hollow tube sealed at the piston by a plate 426. Further, as in Fig. 9, the floating piston 905 may be located within the rod 902 and the elastic resistance to its movement be supplied by a cushion of gas 955 instead of a helical spring. Other forms of valve to control passage means comprising borings in the piston are described with reference to Figs. 12- 16 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712124275 DE2124275A1 (en) | 1971-05-15 | 1971-05-15 | Bumper for motor vehicles with an impact absorber |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1397795A true GB1397795A (en) | 1975-06-18 |
Family
ID=5808034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2244872A Expired GB1397795A (en) | 1971-05-15 | 1972-05-12 | Bumper bar assembly for motor vehicles |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2124275A1 (en) |
FR (1) | FR2137981B1 (en) |
GB (1) | GB1397795A (en) |
IT (1) | IT958842B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2137728A (en) * | 1983-03-29 | 1984-10-10 | Fichtel & Sachs Ag | Support body for a component supported on a piston rod |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1108053B (en) * | 1978-07-10 | 1985-12-02 | Iao Industrie Riunite Spa | HYDROPNEUMATIC ENERGY ABSORBING DEVICE PARTICULARLY FOR MOTOR VEHICLE BUMPERS |
DE3419165A1 (en) * | 1984-05-23 | 1985-11-28 | Boge Gmbh, 5208 Eitorf | IMPACT DAMPER WITH TWO SLIDING TUBES |
IT1219133B (en) * | 1988-03-22 | 1990-05-03 | Fiat Auto Spa | PASSIVE VIBRATION DAMPER IN PARTICULAR FOR THE CONNECTION OF AN ENGINE TO THE VEHICLE BODY |
US5211379A (en) * | 1991-12-18 | 1993-05-18 | P. L. Porter Company | Continuously self-compensating hydraulic positioner |
FR2742505B1 (en) * | 1995-12-13 | 1998-11-27 | Jean Perret Ets | DAMPER |
CN113931961B (en) * | 2021-09-09 | 2023-03-28 | 神龙汽车有限公司 | Novel hydraulic self-adaptive damping adjustment shock absorber |
-
1971
- 1971-05-15 DE DE19712124275 patent/DE2124275A1/en active Pending
-
1972
- 1972-05-10 FR FR7217524A patent/FR2137981B1/fr not_active Expired
- 1972-05-10 IT IT6847472A patent/IT958842B/en active
- 1972-05-12 GB GB2244872A patent/GB1397795A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2137728A (en) * | 1983-03-29 | 1984-10-10 | Fichtel & Sachs Ag | Support body for a component supported on a piston rod |
DE3311323A1 (en) * | 1983-03-29 | 1984-10-11 | Fichtel & Sachs Ag, 8720 Schweinfurt | SUPPORT BODY FOR A COMPONENT SUPPORTED ON A PISTON ROD |
Also Published As
Publication number | Publication date |
---|---|
FR2137981B1 (en) | 1973-07-13 |
IT958842B (en) | 1973-10-30 |
DE2124275A1 (en) | 1972-11-30 |
FR2137981A1 (en) | 1972-12-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PE20 | Patent expired after termination of 20 years |