Machine element or mechanism – Mechanical movements – Reciprocating to reciprocating
Patent
1983-09-20
1986-03-04
Tapolcai, William E.
Machine element or mechanism
Mechanical movements
Reciprocating to reciprocating
F16H 2144
Patent
active
045733694
ABSTRACT:
A linear drive has a pneumatic or hydraulic actuator cylinder, whose piston rod is fixed in place and whose moving, axially guided cylinder forms a supporting and driving part of a stroke ratio changing transmission for transmitting the relative motion between the cylinder and its axial guide to a linearly moving drive output member. A useful effect is produced by having the output member (1) guided on the outside on a slotted tube, a driving spur of the member (1) running in the slot in the tube and being fixed to the stroke ratio changing transmission that is inside. The tube placed round the cylinder is used for axially guiding the cylinder. The stroke ratio changing transmission is for example in the form of two pulleys mounted on the cylinder and a cord trained over them, the cord being fixed to the member and joined to the tube by a mounting arrangement.
REFERENCES:
patent: 2165985 (1939-07-01), Schwentler
patent: 2351049 (1944-06-01), Kaman
patent: 2732723 (1956-01-01), Crofton
patent: 2914955 (1959-12-01), Colborne et al.
patent: 3093121 (1963-06-01), Murphy
patent: 3200656 (1965-08-01), Baskett
patent: 3204208 (1965-08-01), Lyman et al.
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