Title: Fluid pressure operated actuator with safe disassembly means

Abstract: A fluid pressure operated actuator has a cylinder with a removable end cap and a piston rod extending axially through the end cap for transmitting piston movement to an external load and also has an internal compressed spring biasing the piston rod towards a predetermined position. To prevent violent expulsion of elements by the compressed spring upon removal of the end cap, stop means are provided on the piston rod to limit relaxation of the spring prior to the time that the end cap is fully removed from the cylinder.

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Inventors: McLuckie, Walter L. (Coal City, IL, US)

Application Number: 477759
Filing Date: 1974-06-10
Publication_date: 1976-05-11
Assignee: Caterpillar Tractor Co. (Peoria, IL)
Primary Class(es): 92/128 92/130R, 92/168, 92/171.1, 92/255
Other Classes:
US Patent Ref:

2268733	Jan, 1942	Williams	92/130.
2770037	Nov, 1956	Bjorklund et al.	92/130.
2966143	Dec, 1960	Panza	92/130.
3168854	Feb, 1965	Neilson	92/131.
3182564	May, 1965	Sobeck et al.	91/421.
3227053	Jan, 1966	Spalding	92/171.
3272088	Sep, 1966	Kistler	92/171.
3288166	Nov, 1966	Wagner	137/509.
3294030	Dec, 1966	Fox	92/128.
3499510	Mar, 1910	Taylor et al.	92/128.
3746134	Jul, 1973	Viner	188/203.

Other Refs:
Primary Examiner: Maslousky, Paul E.
Assistant Examiner:
Attorney: Phillips, Moore, Weissenberger Lempio & Strabala