US3840087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump arrangement for the brake system of a motor car
Assignee: Robert Bosch GmbH
•
Filing: 1973-03-26
•
Granted: 1974-10-08
•
Expires: 1993-03-26
Abstract
Abstract The cam shaft of a combustion engine drives not only a conventional fuel pump, but is additionally used for driving a pump which pumps brake fluid in a brake circuit designed for unlocking brake-locked wheels. A common connecting lever connects a follower, which is actuated by the cam shaft, with both pumps for synchronous operation.
Inventors
- 👤 Loewis A Von
- 👤 K Riesenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:13
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/42; B60T8/4275; B60T8/40; B60T8/4018; B60T8/4027
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
118 words
A pump arrangement for the brake system of a motorcar, comprising an engine for driving the motorcar and including a cam shaft; a first pump for pumping fuel consumed by said engine; a brake system for the motorcar including a second pump for pumping brake fluid to said brake system; follower means including a push-rod mounted for reciprocation and having two ends; connecting means comprising a two-armed lever having first and second ends cooperating with said first and second pumps respectively, one end of said push-rod engaging said second end of said lever, the other end of said push-rod cooperating with said cam shaft so that said pumps are operated by said cam shaft via said two-armed lever.
Claim 2
Dependent Claim
118 words
A pump arrangement for the brake system of a motorcar, comprising an engine for driving the motorcar and including a cam shaft; a first pump for pumping fuel consumed by said engine; a brake system for the motorcar including a second pump for pumping brake fluid to said brake system; follower means including a push-rod mounted for reciprocation and having two ends; connecting means comprising a two-armed lever having first and second ends cooperating with said first and second pumps respectively, one end of said push-rod engaging said second end of said lever, the other end of said push-rod cooperating with said cam shaft so that said pumps are operated by said cam shaft via said two-armed lever.
Claim 3
Dependent Claim
34 words
Pump arrangement as claimed in claim 1, further comprising a pump housing for said first and second pumps; and wherein said engine includes an engine housing supporting said cam shaft and said pump housing.
Claim 4
Dependent Claim
26 words
A pump arrangement as defined in claim 1, wherein said first and second pumps have respective pistons, one of said pistons being coaxial with said push-rod.
Claim 5
Dependent Claim
18 words
A pump arrangement as defined in claim 3, wherein said one of said pistons is said second piston.
Claim 6
Dependent Claim
34 words
A pump arrangement as defined in claim 1, further comprising supporting means including a guideway, said push-rod being mounted in said guideway and said ends of said push-rod being located outside of said guideway.
Claim 7
Dependent Claim
55 words
Pump arrangement as claimed in claim 5, wherein said supporting means include a pump housing mounted on said engine and having said guideway; and wherein said first and second pumps include first and second cylinder means mounted on said housing, and having first and second inlet and outlet means for fuel and brake fluid, respectively.
Claim 8
Dependent Claim
50 words
Pump arrangement as claimed in claim 6, wherein said connecting means includes a pivot means in said housing, and a connecting lever mounted on said pivot means for angular movement and having first and second ends cooperating with said first and second pumps, and being angularlY reciprocated by said push-rod.
Claim 9
Dependent Claim
55 words
Pump arrangement as claimed in claim 1, wherein said brake system includes a master cylinder, a wheel brake cylinder, and a return conduit connecting said brake cylinder with said master cylinder; and wherein said second pump is located in said return conduit for pumping brake fluid from said brake cylinder back to said master cylinder.
Claim 10
Dependent Claim
89 words
Pump arrangement as claimed in claim 8, wherein said brake system includes a brake conduit for connecting said master cylinder with said brake cylinder, and control valve means in said brake conduit and return conduit having a first position connecting said master cylinder with said brake cylinder, and interrupting said return conduit, and a second position disconnecting said master cylinder from said brake cylinder, and connecting said return conduit with said second pump so that said second pump pumps brake fluid from said brake cylinder into said master cylinder.
Claim 11
Dependent Claim
43 words
Pump arrangement as claimed in claim 9, wherein said brake system includes sensing means for sensing a brake-locked wheel of said motor car, and operatively connected with said control valve means for shifting the same between said first position and said second position.
Claim 12
Dependent Claim
88 words
Pump arrangement as defined in claim 5, wherein said first and second pumps have first and second pistons and first and second parallel piston rods; wherein said two-armed lever has a central portion pivotally mounted on said supporting means, said first and second ends are connected with said first and second piston rods, respectively, said one end of said push-rod engaging said second end of said two-armed lever so that said first and second pistons move in opposite directions and produce suction and pressure, respectively, during simultaneous strokes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |