US4747376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic valve clearance compensation element
Assignee: INA Waelzlager Schaeffler OHG
•
Filing: 1987-07-08
•
Granted: 1988-05-31
•
Expires: 2007-07-08
Abstract
Abstract An hydraulic valve clearance compensation element comprising a housing in which a pressure piston is guided and a pressure space is disposed behind the pressure piston, an oil inlet chamber with an oil inlet opening to supply oil to the pressure space, characterized in that the pressure space (13) and guide means (5) for the pressure piston (6,7) is formed by the base (1), the oil inlet chamber (23) is provided between the base (1) and a housing sleeve (18) which is arranged concentrically at the piston side of the base (1) and the oil inlet opening (26) is provided on the housing sleeve (18).
Inventors
- 👤 Walter Speil
- 👤 Dieter Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:52
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/245; F01L2307/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
An hydraulic valve clearance compensation element comprising a housing in which a pressure piston is guided and a pressure space disposed behind the pressure piston, an oil inlet chamber with an oil inlet opening to supply oil to the pressure space, characterized in that the pressure space (13) and guide means (5) for the pressure piston (6,7) is formed by the base (1), the oil inlet chamber (23) is provided between the base (1) and a housing sleeve (18) which is arranged concentrically at the piston side of the base (1) and the oil inlet opening (26) is provided on the housing sleeve (18).
Claim 2
Dependent Claim
104 words
An hydraulic valve clearance compensation element comprising a housing in which a pressure piston is guided and a pressure space disposed behind the pressure piston, an oil inlet chamber with an oil inlet opening to supply oil to the pressure space, characterized in that the pressure space (13) and guide means (5) for the pressure piston (6,7) is formed by the base (1), the oil inlet chamber (23) is provided between the base (1) and a housing sleeve (18) which is arranged concentrically at the piston side of the base (1) and the oil inlet opening (26) is provided on the housing sleeve (18).
Claim 3
Dependent Claim
34 words
A clearance compensation element of claim 1 wherein an oil outlet opening (27) is arranged at the circumference of the housing sleeve (18) and is offset with respect to the oil inlet opening (26).
Claim 4
Dependent Claim
33 words
A clearance compensation element of claim 2 wherein the oil outlet opening (27) is arranged at the housing sleeve (18) and is offset by 180° with respect to the oil inlet opening (26).
Claim 5
Dependent Claim
47 words
A clearance compensation element of claim 2 wherein at least one of the oil inlet opening (26) and oil outlet opening (27) is defined as an oblong hole to provide an open connection to the oil inlet chamber (23) at each stroke position of the compensation element.
Claim 6
Dependent Claim
46 words
A clearance compensation element of claim 1 wherein the housing sleeve (18) is provided with an opening (28) into which a guide means (30) is inserted and which projects into the oil inlet chamber (23) and exceeds the outer periphery (19) of the housing sleeve (18).
Claim 7
Dependent Claim
34 words
A clearance compensation element of claim 5 wherein the guide element (30) is arranged at housing sleeve (18) circumference and is spaced from the oil inlet opening (26) and the oil outlet opening (27).
Claim 8
Dependent Claim
30 words
A clearance compensation element of claim 1 wherein the outer surface (19) of the housing sleeve (18) defines the guide surface for the valve tappet in a guide bore (31).
Claim 9
Dependent Claim
51 words
A clearance compensation element of claim 1 wherein the base (1) has an opening (24) in the area of the oil inlet chamber (23) and the piston (6,7) is provided with an opening (25) communicating at each stroke position of the piston (6,7) with the opening (24) of the base (1).
Claim 10
Dependent Claim
26 words
A clearance compensation element of claim 1 wherein the housing sleeve (18) has a neck (20) connected to an area of base (1) of reduced diameter.
Claim 11
Dependent Claim
24 words
A clearance compensation element of claim 1 wherein the housing sleeve (18) has one end (21) resting on a shoulder (22) of base (1).
Claim 12
Dependent Claim
22 words
A clearance compensation element of claim 1 wherein the base (1) comprises a piston guide element (36) and a base element (37).
References Cited (Backward Citations)
DE2758957A1
Cited
US4361120A
Cited
US4541373A
Cited
JPS61210206A
Cited
JPS61210204A
Cited
US4607599A
Cited
US4633827A
Cited
DE3541198A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |