US1965517A - Hydraulic valve tappet - Google Patents
Hydraulic valve tappet Download PDFInfo
- Publication number
- US1965517A US1965517A US626709A US62670932A US1965517A US 1965517 A US1965517 A US 1965517A US 626709 A US626709 A US 626709A US 62670932 A US62670932 A US 62670932A US 1965517 A US1965517 A US 1965517A
- Authority
- US
- United States
- Prior art keywords
- valve
- section
- piston
- hydraulic valve
- sections
- 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 - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/245—Hydraulic tappets
- F01L1/25—Hydraulic tappets between cam and valve stem
- F01L1/252—Hydraulic tappets between cam and valve stem for side-valve engines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
July 3, 1934.
W. R. VITALINI HYDRAULIC VALVE TAPPET Filed July 30, 1932 ATTORNEY Patented July 3, 1934 HYDRAULIC VALVE TAPPET Walter R. Vitalini, Milford, Mass. Application July 30, 1932, Serial No. 626,709
1 Claim.
This invention'relates to hydraulic valve tappets for internal combustion engines, and has for the primary object, the provision of a device of the above stated characte1 which will reduce the valve action noise to a minimum and automatically compensate for changes in motor temperatures and valve wear.
With this and other objects in view, this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.
For a complete understanding of my invention, reference is to be had to the followingdescription and accompanying drawing, in which Figure 1 is' a fragmentary vertical sectional view illustrating a hydraulic valve tappet constructed in accordance with my invention and associated with the valve of an engine.
Figure 2 is a fragmentary longitudinal sectional view illustrating control valves for the hydraulic valve tappets.
Figure 3 is a fragmentary sectional view illustrating a modification of my invention.
Referring in detail to the drawing, the numeral 1 indicates a fragmentary portion of an internal combustion engine including a cylinder 2 with a valve 3 associated therewith and normally held in a seated position by a spring 4 mounted on the stem 5 thereof. The base of the engine is indicated at 6 with the cam 7 operating the valve 3. Mounted in the engine above the cam '7 is a tappet unit 8 forming the subject-matter of the presentinvention. The unit 8 has formed therein a fluid chamber 9 connected to the lubricant system of the engine or preferably to the lubricant circulating pump of the engine by a pipe 10 so that lubricant will be forced into the chamber 9. A cylinder 11 is formed in the unit 8 in direct alignment with the stem of the valve 3 and has communication with the chamber 9 by a port 12 capable of being regulated by a needle valve 13.
A piston 14 is slidably mounted in the cylinder 11 and has a tight fit therewith to prevent the escape of the fluid or lubricant by the piston, andthe latter engages the stem 5 of the valve at its upper end while its lower end rides upon the cam '7. The piston 14 includes upper and lower sections 15 and 16 of tubular formation and they have their adjacent ends communicative with each other and spaced by an expansion coiled spring 17 interposed between the sections. The lower section 16 carries a mushroom shaped head 18 to engage the cam '7. When the piston '14 is in its lowermost position, the upper edge of the section 16 is slightly below the port 12 permitting the liquid or lubricant to enter between the sections and'form' a hydraulic cushion therebetween. As the section 16 is raised by the;
When the engine is running at a slow rate of speed, the section 16 of the piston can rise a small distance before the section 15 is forced.
to act, consequently permitting a more complete usage of the energy of the hot gases in the engine before exhaust takes place, however, when the engine runs at a rapid or high rate of speed, the
resistance to the flow of fluid between the chamber 9 and the cylinder by the opening 12 and the valve causes the sections 15 to act almost instantly with the section 16 of the piston.
As the temperature of the engine increases and the valve stem expands, the fluid permits the piston or the section 15 thereof to assume a position slightly nearer the section 16 automatically taking care of the expansion, due to the high temperature by allowing the excess, liquid to return to the reservoir 9.
While I have shown and described the preferred embodiment of my invention, it will be understood that minor changes in construction, combination and arrangement ofparts may be made without departing from: the spirit and scope of my invention, as claimed.
Having thus described my invention, what I claim is:
A hydraulic valve tappet comprising a hydraulically cushioned piston engaging a valve and the operating means for the latter, a cylinder guidingthe piston, said piston including axially aligned sections cooperating with the cylinder in forming a chamber between the sections, an expansion, spring between and housed by the sections, said cylinder having a port in its side, a reservoir around the cylinder, means for connecting the reservoir to the lubricant circulating pump of an engine, and a needle valve mounted in the wall of the reservoir and aligned with the fluid between the reservoir and the chamber of WAL'IER R. VITALINI.
the piston.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US626709A US1965517A (en) | 1932-07-30 | 1932-07-30 | Hydraulic valve tappet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US626709A US1965517A (en) | 1932-07-30 | 1932-07-30 | Hydraulic valve tappet |
Publications (1)
Publication Number | Publication Date |
---|---|
US1965517A true US1965517A (en) | 1934-07-03 |
Family
ID=24511501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US626709A Expired - Lifetime US1965517A (en) | 1932-07-30 | 1932-07-30 | Hydraulic valve tappet |
Country Status (1)
Country | Link |
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US (1) | US1965517A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2442566A (en) * | 1945-04-19 | 1948-06-01 | Weatherhead Co | Self-adjusting tappet |
US2484109A (en) * | 1945-03-02 | 1949-10-11 | Helmuth A Meinecke | Valve mechanism |
US2694387A (en) * | 1944-07-10 | 1954-11-16 | Bendix Aviat Corp | Internal-combustion engine |
US3071929A (en) * | 1958-01-08 | 1963-01-08 | Earl A Thompson | Mechanico-hydraulic power and control unit |
US3304925A (en) * | 1966-06-20 | 1967-02-21 | James E Rhoads | Hydraulic valve lifter |
US3817228A (en) * | 1971-10-25 | 1974-06-18 | J Bywater | Cam motion control unit |
US3938483A (en) * | 1973-08-20 | 1976-02-17 | Joseph Carl Firey | Gasoline engine torque regulator |
US3995606A (en) * | 1976-02-02 | 1976-12-07 | Joseph Carl Firey | Gasoline engine torque regulator with speed correction |
US4009694A (en) * | 1976-04-15 | 1977-03-01 | Joseph Carl Firey | Gasoline engine torque regulator with partial speed correction |
US4143629A (en) * | 1977-01-17 | 1979-03-13 | Caterpillar Tractor Co. | Speed controlled hydraulic lifter for internal combustion engines |
US5203535A (en) * | 1991-06-13 | 1993-04-20 | North American Philips Corporation | Cam actuated valve assembly with hydraulic spring |
US5421359A (en) * | 1992-01-13 | 1995-06-06 | Caterpillar Inc. | Engine valve seating velocity hydraulic snubber |
US5694893A (en) * | 1996-04-22 | 1997-12-09 | Caterpillar Inc. | Outward opening valve system for an engine |
US5709178A (en) * | 1996-04-22 | 1998-01-20 | Caterpillar Inc. | Electronically controlled outwardly opening valve system for an engine |
-
1932
- 1932-07-30 US US626709A patent/US1965517A/en not_active Expired - Lifetime
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2694387A (en) * | 1944-07-10 | 1954-11-16 | Bendix Aviat Corp | Internal-combustion engine |
US2484109A (en) * | 1945-03-02 | 1949-10-11 | Helmuth A Meinecke | Valve mechanism |
US2442566A (en) * | 1945-04-19 | 1948-06-01 | Weatherhead Co | Self-adjusting tappet |
US3071929A (en) * | 1958-01-08 | 1963-01-08 | Earl A Thompson | Mechanico-hydraulic power and control unit |
US3304925A (en) * | 1966-06-20 | 1967-02-21 | James E Rhoads | Hydraulic valve lifter |
US3817228A (en) * | 1971-10-25 | 1974-06-18 | J Bywater | Cam motion control unit |
US3938483A (en) * | 1973-08-20 | 1976-02-17 | Joseph Carl Firey | Gasoline engine torque regulator |
US3995606A (en) * | 1976-02-02 | 1976-12-07 | Joseph Carl Firey | Gasoline engine torque regulator with speed correction |
US4009694A (en) * | 1976-04-15 | 1977-03-01 | Joseph Carl Firey | Gasoline engine torque regulator with partial speed correction |
US4143629A (en) * | 1977-01-17 | 1979-03-13 | Caterpillar Tractor Co. | Speed controlled hydraulic lifter for internal combustion engines |
US5203535A (en) * | 1991-06-13 | 1993-04-20 | North American Philips Corporation | Cam actuated valve assembly with hydraulic spring |
US5421359A (en) * | 1992-01-13 | 1995-06-06 | Caterpillar Inc. | Engine valve seating velocity hydraulic snubber |
US5694893A (en) * | 1996-04-22 | 1997-12-09 | Caterpillar Inc. | Outward opening valve system for an engine |
US5709178A (en) * | 1996-04-22 | 1998-01-20 | Caterpillar Inc. | Electronically controlled outwardly opening valve system for an engine |
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