B64B

LIGHTER-THAN AIR AIRCRAFT

In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.

B64B1/00

Lighter-than-air aircraft

B64B1/005

Arrangements for landing or taking-off, e.g. alighting gear

B64B1/02

Non-rigid airships B64B1/58 takes precedence; balloons B64B1/40

B64B1/04

the profile being maintained by ties or cords connecting opposite surfaces

B64B1/06

Rigid airships

Semi-rigid airships B64B1/58 takes precedence

B64B1/08

Framework construction

B64B1/10

Tail unit construction B64B1/12 takes precedence

B64B1/12

Movable control surfaces

B64B1/14

Outer covering

B64B1/16

rigid

B64B1/18

Attachment to structure

B64B1/20

provided with wings or stabilising surfaces

tail unit construction B64B1/10; movable control surfaces B64B1/12

B64B1/22

Arrangement of cabins or gondolas

B64B1/24

Arrangement of propulsion plant B64B1/34 takes precedence

B64B1/26

housed in ducts

B64B1/28

housed in nacelles

B64B1/30

Arrangement of propellers

B64B1/32

surrounding hull

B64B1/34

of lifting propellers

B64B1/36

Arrangement of jet reaction apparatus for propulsion or directional control

B64B1/38

Controlling position of centre of gravity

B64B1/40

Balloons B64B1/58 takes precedence; toy balloons A63H27/10

B64B1/42

Construction or attachment of stabilising surfaces

B64B1/44

adapted to maintain predetermined altitude

B64B1/46

associated with apparatus to cause bursting

B64B1/48

to enable load to be dropped by parachute

B64B1/50

Captive balloons

B64B1/52

attaching trailing entanglements

B64B1/54

connecting two or more balloons in superimposed relationship

B64B1/56

stabilised by rotary motion

B64B1/58

Arrangements or construction of gas-bags

Filling arrangements

B64B1/60

Gas-bags surrounded by separate containers of inert gas

B64B1/62

Controlling gas pressure, heating, cooling, or discharging gas

B64B1/64

Gas valve operating mechanisms

B64B1/66

Mooring attachments

B64B1/68

Water flotation gear

B64B1/70

Ballasting arrangements

B64B2201/00

Hybrid airships, i.e. airships where lift is generated aerodynamically and statically