GB122180A - Improvements in or relating to Control Devices for Inlet and Exhaust Valves of Internal Combustion Engines. - Google Patents

Improvements in or relating to Control Devices for Inlet and Exhaust Valves of Internal Combustion Engines.

Info

Publication number
GB122180A
GB122180A GB70/19A GB7019A GB122180A GB 122180 A GB122180 A GB 122180A GB 70/19 A GB70/19 A GB 70/19A GB 7019 A GB7019 A GB 7019A GB 122180 A GB122180 A GB 122180A
Authority
GB
United Kingdom
Prior art keywords
valve
lever
cam
spring
roller
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
Application number
GB70/19A
Inventor
Giustino Cattaneo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB122180A publication Critical patent/GB122180A/en
Expired legal-status Critical Current

Links

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
    • F01L1/30—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of positively opened and closed valves, i.e. desmodromic valves

Abstract

122,180. Cattaneo, G. Jan. 2, 1918, [Convention date]. Valve-gear.-Cam gear for operating the valves positively without valve-closing springs comprises two cam-shafts arranged one above the other with the valve lever between them, and a spring member to permit expansion of the valve stem. As shown in Fig. 1, the cams for opening and closing the valve engage the same roller 5 on the valve-lever 1, and the fulcrum 2 of the valve lever is supported by a spring 14. The two cam shafts are geared together and rotate in opposite directions. In a modification the lever closes the valve by means of a sliding collar on the valve stem which engages a helical cushioning spring. The collar and the abutment for the spring are carried by a sleeve which can be screwed along the valve stem for adjustment. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the arrangement shown in Fig. 1 (cancelled), in which the valves are opened and closed by cams on a single shaft. The inlet valve stem a is actuated by a pair of cams which engage the two arms g, i of a bellcrank lever and the exhaust valve is arranged at the opposite side of the cam-shaft and worked by similar gear. The cam o for closing the valve engages a roller on arm r pivoted at n to the bellcrank lever, the roller being pressed against the cam by a laminated spring p. A stop q on the bell-crank lever limits the relative movement of the arms r, i. In a modification, the cam o engages a roller on the lever i, and the latter closes the valve through a spring connexion on the valve stem like that described above. This subject-matter does not appear in the Specification as accepted.
GB70/19A 1918-01-02 1919-01-02 Improvements in or relating to Control Devices for Inlet and Exhaust Valves of Internal Combustion Engines. Expired GB122180A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT122180X 1918-01-02

Publications (1)

Publication Number Publication Date
GB122180A true GB122180A (en) 1920-03-18

Family

ID=32375406

Family Applications (1)

Application Number Title Priority Date Filing Date
GB70/19A Expired GB122180A (en) 1918-01-02 1919-01-02 Improvements in or relating to Control Devices for Inlet and Exhaust Valves of Internal Combustion Engines.

Country Status (1)

Country Link
GB (1) GB122180A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002507A (en) * 1959-02-03 1961-10-03 Daimler Benz Ag Valve control mechanism for internal combustion engines
US3217699A (en) * 1964-04-20 1965-11-16 Dolza John Valve actuation mechanism
US3313280A (en) * 1965-04-16 1967-04-11 Automobile Racing Club Of Okla Variable valve timing mechanism
US3430614A (en) * 1967-07-07 1969-03-04 Eaton Yale & Towne Desmodromic drive arrangement
US3463131A (en) * 1968-03-12 1969-08-26 John W Dolby Valve operating mechanism
US3610218A (en) * 1970-04-13 1971-10-05 Roger Owen Durham Desmodromic valve actuator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002507A (en) * 1959-02-03 1961-10-03 Daimler Benz Ag Valve control mechanism for internal combustion engines
US3217699A (en) * 1964-04-20 1965-11-16 Dolza John Valve actuation mechanism
US3313280A (en) * 1965-04-16 1967-04-11 Automobile Racing Club Of Okla Variable valve timing mechanism
US3430614A (en) * 1967-07-07 1969-03-04 Eaton Yale & Towne Desmodromic drive arrangement
US3463131A (en) * 1968-03-12 1969-08-26 John W Dolby Valve operating mechanism
US3610218A (en) * 1970-04-13 1971-10-05 Roger Owen Durham Desmodromic valve actuator

Similar Documents

Publication Publication Date Title
GB122180A (en) Improvements in or relating to Control Devices for Inlet and Exhaust Valves of Internal Combustion Engines.
US2663288A (en) Variable timing cam follower
GB343688A (en) Improvements in positively operated valve gear for internal combustion engines
GB126389A (en) Improvements in Valve-Operating Mechanism for Internal Combustion Engines.
GB123658A (en) Improvements in Valve Mechanism for Internal Combustion Engines.
GB122379A (en) Improvements relating to Mechanically Operated Valves of Internal Combustion Engines.
GB123578A (en) Improvements in Valve Gear for Internal Combustion Engines.
GB578468A (en) Improvements in engine valve gear
US1544784A (en) Valve-operating mechanism for internal-combustion engines
GB260506A (en) Improvements in or relating to valve actuating mechanism for internal combustion engines
GB132070A (en) Improvements relating to the Valves of Internal Combustion Engines.
GB203767A (en) Improvements in four-stroke internal combustion engines
GB125360A (en) Improvements in or relating to Valve Mechanism for Internal Combustion Engines.
GB607750A (en) Improvements in decompressor mechanism for compression ignition engines
GB149622A (en) Improvements in valve gear for internal combustion engines
GB250095A (en) Improvements relating to the valves and valve gear of internal combustion engines
GB191503324A (en) Improvements in Valve-operating Mechanism for Internal Combustion Engines.
US1738435A (en) Cam-operated balanced valve gear for steam locomotives and like engines
GB118408A (en) Improvements in Governing Internal Combustion Engines.
GB216607A (en) Improvements in and relating to the valve gear of internal combustion engines
GB191319193A (en) Improvements in Means for Operating Valves of Internal Combustion Engines.
GB179406A (en) Improvements in overhead valve gear for internal combustion engines
GB166740A (en) Improvements in or relating to valve mechanism for internal combustion engines
GB141949A (en) Improvements in valve-mechanism of internal combustion engines
GB190611270A (en) Improvements in and relating to Internal Combustion Engines.