Master cylinder fast fill valving mechanism with ramp
US4790138A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1987 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | Feb 3, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T11/224
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A master cylinder (10, 210, 310, 410) includes a housing bore (14) having at one end (16) a bearing member (18) attached thereto and retaining a sleeve member (20) within the bore (14). One piston (30, 230, 530) has at one end (32, 232) thereof a fast fill mechanism (150, 350, 450). The fast fill mechanism (150, 350, 450) includes a seal support (130, 330, 430), fast fill seal (160, 360, 460), a ramp (132, 332, 432) on the fast fill seal support (130, 330, 430), and a ramp (125, 325, 425, 525) at the one end (32, 232) of the piston. The ramp (125, 325, 425, 525) at the one end (32, 232) of the one piston (30, 230, 530) may be disposed within the piston (230, 530, 441) or on a flange support (120) mounted on the one piston (30). Displacement of the one piston (30) causes an increase in fluid pressure in an associated pressure chamber (88), the pressure causing the ramps (132, 332, 432; 125, 325, 425, 525) to resiliently engage one another until one ramp (125, 332, 432) is displaced radially and permits the fast fill mechanism (150, 350, 450) to be displaced axially along the piston (30, 230, 530, 441). The fast fill seal (160, 360, 460) disengages sealingly from the one end (32, 232…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.