Hinged closure for gas pycnometer

A pycnometric device, comprising:

• a housing defining an access opening and a locking recess extending at least partially within the housing;
• a swing arm mounted to the housing by a hinge, wherein the swing arm is configured to be selectively pivoted toward and away from the access opening;
• and
• a closure captured by the swing arm, wherein the closure is configured to be selectively moved relative to the swing arm between a retracted position and an inserted position at least partially in the access opening;
• wherein the closure comprises a cam plate configured to cooperate with a cam follower configured to extend at least partially within the locking recess when the closure is moved into a closed and sealed configuration.

A pycnometric device, comprising:

• a housing having an access opening;
• a swing arm mounted to the housing by a hinge, wherein the swing arm is configured to be selectively pivoted toward and away from the access opening, wherein the swing arm comprises:
• a support cylinder engaging the closure,
• a support flange projecting outwardly from the support cylinder, and
• a hinge extension extending from the support flange and/or the support cylinder to the hinge;
• and
• a closure captured by the swing arm, wherein the closure is configured to be selectively moved relative to the swing arm between a retracted position and an inserted position at least partially in the access opening,
• wherein the closure comprises locking features for cooperating with engagement features that are configured to extend at least partially within the housing when the closure is moved into a closed and sealed configuration.