US PATENT SUBCLASS 92 / 15
WITH RELEASABLE STOP OR LATCH MEANS TO PREVENT MOVEMENT OF WORKING MEMBER

Current as of: June, 1999
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92 /   HD   EXPANSIBLE CHAMBER DEVICES

15WITH RELEASABLE STOP OR LATCH MEANS TO PREVENT MOVEMENT OF WORKING MEMBER {8}
16  DF  .~> With timing or delay means
17  DF  .~> Engages member coaxial with and rotatable relative to working member
18  DF  .~> Includes interfitting parts engageable at plural positions including position intermediate stroke limits {1}
20  DF  .~> Engages power element movable relative to working member
21 R  DF  .~> Plural selectively operable actuators for releasable means {1}
22  DF  .~> Relatively movable working members with interdependent means
23  DF  .~> Means includes element interfitting between working member and fixed part {2}
28  DF  .~> Fluid actuated (27)

DEFINITION

Classification: 92/15

(under the class definition) Apparatus comprising means engageable between a working member or a member moved thereby and a fixed part, said means when engaged being effective to prevent the movement of said working member relative to said part in at least one direction of its movement at some point along the path of travel thereof, said means being selectively disengageable to permit movement of the working member in such direction.

(1) Note. The movement preventing means may be held in operative working member movement preventing position by the working fluid in the working chamber, or may be released from such operative position by such working fluid.

(2) Note. The movement preventing means may hold the working member against movement either from the action of a mechanical force exerted thereon or from a force exerted thereon by working fluid acting against the end face thereof.

(3) Note. For classification under this definition the means must be released before any movement of the working member in the direction in which it is held against movement can occur. A mere resilient detente which is releasable responsive to a movement of the working member is excluded from this definition. Such structure is classified in subclass 30.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+, for a means to control the flow of nonworking arresting fluid for the working member.

13+, for an adjustable or disengageable stop or abutment means for varying the extent of reciprocatory movement of the working member.

30, for a resilient detente engageable between a fixed part and a working member or a member moved thereby.

SEE OR SEARCH CLASS

91, Motors: Expansible Chamber Type,

41, for a correlated control of motive fluid, and locking means for the working member of an expansible chamber motor.

188, Brakes, appropriate subclasses for a brake or latch, per se, and particularly

67, for a brake or latch for a rod. Class 188 takes a nominally claimed piston and cylinder, if the claim is otherwise directed to a brake or latch means for holding the piston against movement relative to the cylinder.