Lisa Vanderpump has been granted an emergency restraining order after she was threatened by a crazed patron at her West Hollywood restaurant, Pump.

The Real Housewives Of Beverly Hills star was meeting customers at the luxe West Hollywood bar and eatery she owns with husband Ken Todd when she was confronted by Kendrick Rustad, 47, on Saturday night.

The restaurant was packed at the time, with multiple sources telling DailyMail.com that well-dressed Rustad suddenly started shouting obscenities after spotting Lisa, 57, at around 9pm.

Target: Terrified Lisa Vanderpump has been granted emergency restraining order after a crazed patron threatened her at Pump restaurant on Saturday night

Arrested: Kendrick Rustad, 47, was arrested and released on bail; Lisa Vanderpump was granted an emergency restraining order

'He was spitting and screaming and extremely aggressive,' said a source, adding that Rustad explicitly threatened the mother-of-two's personal safety, despite not being previously known to the star.

Millionaire English-born restaurateur Lisa summoned security, who were at the scene within seconds, moving Rustad outside to the sidewalk, where he is said to have lashed out, kicking out at a crowd of onlookers who filmed the disturbance.

Police officers arrived quickly and spent 45 minutes attempting to subdue Rustad, who continued to scream abuse and spit, the source said.

'He was put in the back of the car and was trying to kick the window out, so they had to move him out of the vehicle and onto a stretcher-type thing,' the source explained.

Inviting: The incident happened inside the luxe garden restaurant Pump in West Hollywood, after 9pm on Saturday night

High-end: Pump is known for it's fabulous decor and flattering lighting

Open to the street: Pump is in West Hollywood, Los Angeles's gay neighborhood, which is known for having a tolerant and welcoming atmosphere

Rustad was arrested and booked on a misdemeanor charge, before being released on $250 bail.

An emergency restraining order was granted banning Rustad from within 100 feet of reality stars Lisa and Ken's multiple business interests - including Pump, Sur and new bar TomTom. The couple intend to return to court on Friday to extend the restraining order, the source said.

West Hollywood is Los Angeles's gay neighborhood, and is known for having a tolerant and welcoming atmosphere.

Lisa is a common sight at the lavish garden-themed Pump on busy evenings, walking around the open-air space greeting customers with a smile, and posing for selfies with fans of RHOBH and her breakout show Vanderpump Rules.

Target: Lisa was having a small family dinner when the incident happened

Socializing: Lisa is a common sight at the lavish restaurant on busy evenings, walking around the open-air space greeting customers with a smile, and posing for selfies with fans of RHOBH and her breakout show Vanderpump Rules

She was said to be too 'deeply stressed' by the unprecedented confrontation to comment, but family friend Rich Aguiar said she had been enjoying a small dinner when the incident happened.

'I was worried for her,' said Aguiar, who had been part of the family dinner party. 'She's so welcoming and open. To see somebody who was that aggressive was very disturbing.'

Aguiar praised the West Hollywood police department for their quick response, saying that multiple officers were at the scene within minutes.

The sentiment was echoed by Pump, which released a statement to DailyMail.com.

'Normally we have a very safe and friendly environment in Pump and elsewhere in West Hollywood. We hope this man gets the help he needs.'