Valve-actuated suction apparatus

1. A valve-actuated suction apparatus, comprising:

an anchor member comprising a non-porous resilient material;

the anchor member comprising a flexible base seal member and an anchor member stem;

the base seal member being arranged to seal against a surface;

the anchor member stem comprising a vent port extending therethrough;

a plunger valve operable to selectively seal and unseal the vent port;

the plunger valve comprising a plunger valve head and a plunger valve stem;

the plunger valve stem being slidably disposed in the vent port and slidable between a closed position of the plunger valve wherein the vent port is sealed and an open position of the plunger valve wherein the vent port is unsealed;

the plunger valve stem comprising two or more protruding transverse flanges that sealably engage a sidewall of the vent port when the plunger valve is in the closed position;

the plunger valve stem comprising a first transverse flange that sealably engages a corresponding first transverse channel in the vent port and a second transverse flange that sealably engages either a non-channeled portion of the vent port sidewall or a corresponding second transverse channel in the vent port; and

wherein the first transverse flange is (a) outboard of the second transverse flange so as to be comparatively farther from the base seal member, or (b) inboard of the second transverse flange so as to be comparatively closer to the base seal member.

2. The apparatus of claim 1 , wherein at least one of the two or more transverse flanges sealably engages the vent port sidewall with an interference fit.

3. The apparatus of claim 1 , wherein each of the two or more transverse flanges sealably engages a corresponding transverse channel in the vent port sidewall.

4. The apparatus of claim 1 , wherein the second transverse flange sealably engages the vent port sidewall with an interference fit.

5. The apparatus of claim 1 , wherein each of the first and second transverse flanges sealably engages the vent port sidewall with an interference fit.

6. The apparatus of claim 1 , wherein portions of the plunger valve stem that do not comprise the two or more transverse flanges are equal to or smaller in cross-sectional size than the vent port.

7. The apparatus of claim 1 , wherein one of the transverse flanges is cross-sectionally larger than the other.

8. The apparatus of claim 1 , wherein the first transverse flange is cross-sectionally larger than the second transverse flange.

9. The apparatus of claim 1 , wherein the first and second transverse flanges are the same size.

10. The apparatus of claim 1 , wherein the vent port and the two or more transverse flanges have circular cross-sections, and wherein the two or more transverse flanges comprise two or more circular rings.

11. The apparatus of claim 1 , wherein the two or more transverse flanges are disposed on an outboard vent port stopper portion of the plunger valve stem, and wherein the plunger valve stem further includes an inboard air bypass neck portion of the plunger valve stem.

12. The apparatus of claim 11 , wherein the two or more transverse flanges sealably engage(s) the vent port in order to block airflow through the vent port when the plunger valve is in the closed position, and wherein the two or more transverse flanges disengage(s) from the vent port to allow airflow through the vent port when the plunger valve is in the open position.

13. The apparatus of claim 12 , wherein the inboard air bypass neck portion is arranged to allow airflow through the vent port when the plunger valve is in the open position.

14. A method of using a valve-actuated suction apparatus:

the valve-actuated suction apparatus comprising:

an anchor member comprising a non-porous resilient material;

the anchor member comprising a flexible base seal member and an anchor member stem;

the base seal member being arranged to seal against a surface;

the anchor member stem comprising a vent port extending therethrough;

a plunger valve operable to selectively seal and unseal the vent port;

the plunger valve comprising a plunger valve head and a plunger valve stem;

the plunger valve stem being slidably disposed in the vent port and slidable between a closed position of the plunger valve wherein the vent port is sealed and an open position of the plunger valve wherein the vent port is unsealed;

the plunger valve stem comprising two or more protruding transverse flanges that sealably engage a sidewall of the vent port when the plunger valve is in the closed position;

the plunger valve stem comprising a first transverse flange that sealably engages a corresponding first transverse channel in the vent port and a second transverse flange that sealably engages either a non-channeled portion of the vent port sidewall or a corresponding second transverse channel in the vent port; and

wherein the first transverse flange is (a) outboard of the second transverse flange so as to be comparatively farther from the base seal member, or (b) inboard of the second transverse flange so as to be comparatively closer to the base seal member;

the method comprising (in no particular order):

positioning the suction apparatus so that the base seal member is in contact with the surface, with the plunger valve in either the closed position or the open position;

causing the plunger valve to assume or maintain the closed position while flattening the base seal member (as necessary) against the surface to establish an airtight seal therewith; and

actuating the plunger valve to the open position while the base seal member is attached to the surface to detach the seal member from the surface.